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Document:	RV20 Optical Disk Subsystem Service Guide
Order Number:	EK-ORV20-SV
Revision:	001
Pages:	186
Original Filename:

OCR Text

EK-ORV20-SV-001

RV20
Optical Disk Subsystem
Service Guide

EK-ORV20-SV-001

RV20

Optical Disk Subsystem
Service Guide

Prepared by Educational Services

of Digital Equipment Corporation

1st Edition, February, 1988
Copyright © 1988 by Digital Equipment Corporation.
All Rights Reserved.
Printed in U.S.A.
The reproduction of this material, in part or whole, is strictly prohibited. For copy

information, contact the Educational Services Department, Digital Equipment

Corporation, Maynard, Massachusetts 01754.
The information in this document is subject to change without notice. Digital Equipment

Corporation assumes no responsibility for any errors that may appear in this document.
WARNING

Use of controls and adjustments or performance of procedures other than
those specified herein may result in hazardous radiation exposure.

cLass 1

DANGER
INVISIBLE LASER RADIATION WHEN OPEN.

LASER PRODUCTS

AVOID DIRECT EXPOSURE TO BEAM.

LEGAL NOTICE: TMSCP and STI protocols and documentation are the proprietary
information of Digital Equipment Corporation. UNIBUS/Q-BUS/BI-BUS port drivers

and documentation for MSCP/TMSCP products are also proprietary information of
Digital Equipment Corporation.

NOTICE: This equipment generates and uses radio frequency energy. It has been type
tested and found to comply with the limits for a Class B computing device in accordance
with the specifications in Subpart J of Part 15 of

FCC Rules, which are designed to pro-

vide reasonable protection against radio and television interference in a residential installation. However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause interference to radio or television reception, the
user is encouraged to try to correct the interference.

The following are trademarks of Digital Equipment Corporation, Maynard,

Massachusetts.

dlilal it]a] 18

DECwriter

Q22-Bus

DEC

DIBOL

Rainbow

VAXSstation

DECmate

MASSBUS

RSTS

VAXstation II

DECnet

PDP

RSX

VMS

DECsystem-10

P/OS

DECSYETEM-20

Professional

RV20

DECUS

Q-Bus

UNIBUS

VAX

Work Processor

Contents

Chapter 1 — Introduction
e 1-1
1.1 Product Description. . . . . . . . v v vt i
oo e 1-1
1.2 Subsystem Description. . . . . . . ...
oo 1-3
1.3 Field Replaceable Units. . . . . . . ... ... oo
1-5
e
1.4 DIagnostiCs. . . . v v v v v i e
v i 1-5
v
1.5 Tools and Equipment . . . . . .. ... .
e e e 1-6
1.6 Related Documentation. . . . . . .« v v v v v v v v vt e e
e 1-6
e
e
e
e
e
e
1.7 Drive Operation . . . . . ... ... ... ... e
e e e 1-6
e
1.7.1 Front Panel . . . . . . . . 0 i i i
1-10
e
i
.
..
.
.
.
.
1.7.2 Maintenance Panel . . .
e e 1-15
e
e
1.7.3Rear Panel. . . . . . . . 0 i i

Chapter 2 — Subsystem Testing
e e e e e 2-1
e e e e e
2.1 General . . . .
2.2 Running Level III Diagnostics Through VDS. . . . . ........... 2-2
2-2
e
2.21Equipment. . . . . .o oo e
2-2
e
e
e
e
et
et
e
2.22 HELP. . . . i i i i
2-2
....
2.2.3 Bringing VDS Up and Loading EVRVA . .. ........

2.24 ATTACHand SELECT . . . . . . ... v 2-2
2.25 RunningtheTests . . . . ... ... ... v 2-4
2.2.6 Test Descriptions. . . . . . .« v v v v v v e v v i 2-7
e 2-14
o o
2.2.7 Error Reporting. . . . . . . ...
Contents

1iii

2.3 Running Level III Diagnostics Through MDM . . ... ........
.. 2-20
23.1 Equipment.

. . . . . ... ..

e 2-20

23.2HELP. . . . .

2-20

2.3.3Bringing MDM Up.

. . . ... ... . e 2-21

234 MenuMode . . ....... .. ... ... e 2-24

2.3.5 RunningtheTests . . .. ... ... .................. 2-25
2.3.6 Error Reporting.

. . . .. . ... ..

. .. e 2-217

2.4 Running Level IIR Data Reliability Diagnostics Through VDS . .
241 Equipment.
24.2HELP.

. . . 2-27

. . . ...
e e e e
e 2-27

. . .. e 2-28

2.4.3 Bringing VDS Up and Loading EVRVB

. .. ............ 2-28

244 ATTACHand SELECT . . .. ... ... ... ...

... ..... 2-28

2.45RunningtheTests . . . ......................... 2-30
2.4.6 Test Descriptions.

. . . ... ....... ... .. .. ... ..... 2-30

24TEventFlags . . . ... ...
248 Error Reporting.

.. .. . .. . .. 2-31

. . . ...... ....
. .. . ... ... . .
... 2-32

2.5 Running Level 2R DUP Tests Through VDS . . . ... .. .. ... ... 2-33
251 Equipment.
26 2HELP.

. . . ... ... ...

2-33

. . ...

2-33

2.5.3 Bringing VDS Up and Loading EVRVC
26,4 ATTACHand SELECT.

............... 2-33

. ... ... ... .............. 2-33

25,5 RunningtheTests . . ... ....................... 2-34
2.6.6 Error Reporting. . . . .. .. ..... ... ... ... ... ..... 2-35

26 VMS Error Logs.

. . . . ... .. .

. e, 2-35

2.7 Power-Up Testing the Drive Subsystem Controller . . . .. .....
.. 2-37
2.7.1 PerformingtheTest . . . .. ... ................... 2-39

2.7.2 Controller Fatal Error Indication

. .. ................ 2-40

Chapter 3 — RV20 Drive Off-Line Testing
3.1 General . . . . . . ...
e, 3-1
3.2 T ests.

. .

e e

3.3 Power-Up Procedure (SAM 1000).

e e

e, 3-1

. . . . ... ... ... ... .. .... 3-5

3.3.1 AC Power Problem Isolation (SAM 1001). . . ... ......
... 3-6

3.3.2 AC Power Distribution Problem Isolation (SAM 1002). ...
. .. 3-7

3.3.3 DC Power Problem Isolation (SAM 1003)

. ............. 3-8

3.3.4 Operator Panel Initialization Problem Isolation (SAM 1004) . . .3-10
3.3.5 Maintenance Panel Initialization Problem Isolation (SAM 1005) .3-11

3.4 Entering Automatic Self-Test Mode (SAM 1006)

. .. ... ....... 3-12

3.5 Entering CE Mode (SAM 1007).

it 3-13

Contents

. . . . . . . . .

3.6 Diagnostic Test Procedure. . . . . .. ... ... ooy 3-14
3.6.1 Changinga TestorOption . . . ... ... ........ ..., 3-15
3.6.2 Changing Input Parameters . .. ... ... ............. 3-16

..., 3-18
......
3.6.3 Selecting a Testing Option . . . . .. .....

3.6.4 Performing the Test to Read/Modify Data in the EEPROM. . . .3-19
e 3-21
e
e
3. 7Failure Analysis . . . . . ... . i
3.7.1 SAM Failure Codes 07,0B,and0C . . . . ... ... ... ... .. 3-57

3.7.2SAM FailureCode 42 . . . ... ......... e 3-58

e e e e e e e 3-59
3.7.3 SAM FailureCode 43 . .. ............. e
3-60
it
i
i
i
i
.
.
.
.
.
.
.
.
.
3.7.4 SAM Failure Code 4F
3.7.5 SAM Failure Code 79 . . . . . . . o i i i i i i ittt 3-61
376 SAM Failure Code TA . . . . . . . i i i i it ittt e e e e e e 3-61
et o 3-62
3.7.7SAMFailureCode 7B . . . . . . . .« ¢« i i i i i i e
3-64
i
e
i
i
i
i
i
i
.
.«
.
.
.
.
.
.
7TE
3.7.8SAM Failure Code
3.7.9 SAM Failure Code 80 . . . . . . . . . i i i i i it v it 3-64
3.7.10 SAM Failure Code 81. . . . . . . .« i i v i vt v vt vt v 3-65
v v i vt v e 3-65
3.7.11 SAM Failure Code 90. . . . . . . . .
3.7.12SAM FailureCode 9D . . . . . . . . . i i i vt v it i e 3-66
i v i v v it v vy 3-66
3.7.13 SAM Failure Code CO . . . . . . .. .
v v it 3-67
3.7.14 SAM Failure Code C1 . . . . . .. ..
v v 3-68
..
..
3.7.15 SAM FailureCode C2 . . . . ..
3.716 SAM Failure Code C3 . . . . . . . i i i i v i vt v v v oo 3-69
e e 3-71
3.7.17 SAM FailureCode C4 . . ... ... ... ... .. e

Chapter 4 — Removal and Replacement

41 General . . . ...

e e I 4-1

4.2 Chapter Organization. . . . ... ... ..oy 4-1

4.3 Removal and Replacement — External Parts. . . . ... ... .. .. .. 4-2
4.3.1 Filter Grill and Filter Removal and Replacement . . . . . . .. .. 4-2
4.3.2 Front Bezel Removal and Replacement. . . . . ... ... ..... 4-4
4.3.3 Top Cover Removal and Replacement. . . . ... .......... 4-5
.. 4-6
4.3.4 Operator Panel Removal and Replacement. . . . . ... ....
... .. 4-7
4.3.5 Maintenance Panel Removal and Replacement . . . ...
... .. 4-8
...
.
4.4 Removal and Replacement — Internal Rear Parts. . . .
4.4.1 Power Supply Removal and Replacement . . ............ 4-8
4.4.2 PCA Removal and Replacement . . . . . ... ... ......... 4-10
4.4.3 Card Rack Removal and Replacement . . ... ........... 4-14
4.4.4 Card Rack Backplane Removal and Replacement. . . . .. .. .. 4-15

Contents

4.5 Removal and Replacement — Internal Front Parts . ... ... ... .. 4-16
4.56.1 Fan Assembly Removal and Replacement . . . .. ......... 4-20

4.5.2 Baseplate Removal and Replacement . . . . . ............ 4-21
4.5.3 Spindle Pulley Belt Removal and Replacement . . . ... ...
.. 4-24
4.5.4 Spindle Grounding Brush Removal and Replacement . . . . . .. 4-26
4.5.5 Spindle Assembly Removal and Replacement . . . . ... ... .. 4-26
4.5.6 Spindle Motor/Cable Assembly Removal and Replacement . . . .4-28
4.5.7 Spindle Brake Removal and Replacement . . . ... ... ... .. 4-30

4.5.8 Baseplate Terminator PCA Removal and Replacement . . . . . . 4-30
4.5.9 Carriage Assembly Removal and Replacement . . . ... ... .. 4-32
4.5.10 Guardband Sensor Removal and Replacement. . . ... ... .. 4-35
4.5.11 Tachometer Sensor Removal and Replacement . . . .. ...
.. 4-37
4.5.12 Interlock Solenoid Removal and Replacement . . . . .. ... .. 4-38

4.5.13 Carriage Lock Solenoid Removal and Replacement . . . . . . . . 4-40

Figures
1-1 RV20 Subsystem

. . . . ... ... .. ... . .

1-2

1-2 RV20 Subsystem Block Diagram . . . .. ..................

1-3

1-3 RV20 Front Panel . . . . .. ... ... .. ... . . . . . . . . ... ...,

1-7

1-4 RV20 Maintenance Panel

1-6 RV20 Rear Panel

. . ... ... ... ................ 1-10

. .. .............. e

e e 1-16

2-1 Drive Subsystem Controller LEDs . . . . ... ............... 2-37

4-1 Filter Grill Removal.

. . . . . ... ... ... ... .. .. .. .. ..... 4-3

4-2 Front Bezel Removal . . . . ... ... .................... 4-4
4-3 RV20 Internal Parts Locations . . . ... .................. 4-8

4-4 Power Supply Removal . . . . . ... ... ... ... ... .. ....... 4-9
4-5 Card Rack Slot Assignments . . . ... ... ................ 4-11

4-6 Card Rack Serviceand Removal . . ... .................. 4-12

4-71 PCA Mounting Brackets . . . . . ... ................. .. .4-13
4-8 Card Rack Backplane. . . . ... ....................... 4-15
4-9 RV20 Baseplate Parts Locations . . . . . ... ... ............ 4-16

4-10 RV20 Wiring . . . ... ... ... e, 4-18
4-11 Baseplate Wiring.

. . . . ... ... ... .. ... .. 4-19

4-12 Spindle Parts . . . . . .. .. ... .. . .. e, 4-25
4-13 Baseplate Terminator PCA. . . .. ... ... ... .. ... .. ..... 4-31
4-14 Carriage Location . . . ... ... ..............e 4-33

4-15 Carriage Removal . . . .. ... ... .. ... ... ... .. ... ..., 4-34
4-16 Interlock Solenoid Removal . . ... .................... 4-39

4-17 Carriage Lock Solenoid Removal . . .. ... ............... 4-41

Contents

Tables

v i 1-4
1-1 Field Replaceable Units. . . . . . .. ... oo
e e e 1-6
1-2 Related Documentation. . . . . . . .« c v vt v v vt b e e
1-3 Operator Panel Controls and Indicators . . . . ... ............ 1-8
1-4 Maintenance Panel Controls and Indicators. . . . . ... ... ... ... 1-11
e e 2-6
2l Level IIIMesStS . . v v v v v vt e e et e e e et ot o e e
e 2-14
e
i
o
2-2Message Fields. . . . ... ...
e e e e e e 2-15
e e e
03 Brror Classes. . o v v v v v v e e e e e e e e e
e e e e e 2-16
24 Brror Codes . . . . v v v i i e e e e e e e e e e
e e e 2-34
e
e
e
e
et
e
e
e
e
e
i
v
v
v
v
v
v
.
.
.
2.5 Level 2R DUP Tests
2-36
.......
........
..
2-6 VMS Error Log Format/Event Codes . . .
e e e e 3-3
Bl RV20 TeStS . . v v v v v e v b e et et e e e e
e 3-22
e
e e
v
i
v
i
v
v
v
v«
.
.
.
.
.
.
Codes
failure
Failure/Sub
3-2
e 3-49
e
e
e
e
oo
o
vt
v
vt
it
v
i
v
v
.
.
.
.
.
.
.
3.3 SAMFailureCodes
3-53
...,
...
...
...
..
.
.
.
Codes
3-4 SAM Failure Code 7E, Subfailure

3.5 SAM Failure Code CO, SubfailureCodes . . ... ... ... ....... 3-56

Contents

Uil

Chapter 1
Introduction

1.1 Product Description
The RV20 optical disk drive is a random-access mass storage device using removable media. The RV20 is a Write-Once Read-Many (WORM) drive that uses
a laser system to write and read data. Each RV20 disk cartridge can store up
to one gigabyte of information per side.

The RV20 drive uses its own internal bus, the ISI bus. The ISI bus can support up to four drives in a subsystem (one master with three daisy-chained
slaves). Each drive in a subsystem must have a unique ISI address (control
module number), 0 to 3.

1.2 Subsystem Description
The RV20 subsystem is contained in an H9643 cabinet. All drives in the subsystem are powered through an 874 power controller also contained in the
H9643. The power controller connects to site power. The H9643 may also contain an RA- series disk drive that is independent of the RV20 subsystem.
Figure 1-1 shows the H9643 cabinet with four RV20s and an RA- series disk
drive installed.

Introduction

1-1

Figure 1-1 RV20 Subsystem

—
—
S
E——

\é\

SHR-0259-87

The RV20 subsystem consists of up to four RV20s cabled in a daisy-chain configuration. A subsystem can be any combination from the minimum configura-

tion of one master drive to a maximum configuration of four RV20s (one
master drive with three slave drives daisy-chained off of the master).

A master

drive contains a drive subsystem controller module that is the interface between the ISI bus and LESI. The H9643 can also hold four master RV20

drives (four separate subsystems). The LESI data leaves the drive subsystem
controller in the master and enters a KLESI adapter module in the BI- or
Q-Bus host system. Figure 1-2 is a block diagram of a four-drive RV20 subsystem (one master with three slaves).

1-2

Introduction

Figure 1-2 RV20 Subsystem Block Diagram

VAX HOST
P ]

KLESI

ADAPTER [®

LESI

DRIVE

SUBSYSTEM

CONTROLLER

ISI

] ADDRESS
0

MASTER

—
oo

HOST
BUS

RV20

ISI

(OPTIONAL)

¢ ADDRESS

RV20

=] APPAESS

SLAVE

CPU

(OPTIONAL)

ISI

SLAVE

ISI

SLAVE

RV20
(OPTIONAL) Lo ADD;!ESS

SHR-0258-87

1.3 Field Replaceable Units
The subsystem Field Replaceable Units (FRUs) are listed in Table 1-1.

Introduction

1-3

Table 1-1 Field Replaceable Units
Part Number

Part Name

T1014

KLESI-B adapter module

M7740

KLESI-Q adapter module

BC17Y-XX

LESI interface cable

29-26800

ISI interface cable

29-26458-00

ISI terminator assembly

29-26450-00

Rear panel ground strap E2

29-26454-00

Filter grill

29-26448-00

Air filter

29-26452-00

Start/Stop switch (operator panel)

29-26463-00

Write Protect switch (operator panel)

29-26438-00

Operator panel PCA

29-26434-00

Maintenance panel

29-26430-00

Power supply

29-26460-00

Card rack backplane

29-26459-00

Drive subsystem controller

29-26429-00

ECC PCA

29-26427-00

ISI PCA

29-26435-00

Servo/drive control (S/DC) PCA

29-26439-00

Modulator demodulator synchronizer (MDS) PCA

29-26428-00

Read/write control (R/WC) PCA

29-26437-00

Servo systems PCA

29-26436-00

Error signal generator (ESG) PCA

29-26455-00

Fan assembly

29-26425-00

Spindle

29-26424-00

Spindle pulley belt

29-26476-00

Spindle grounding brush

29-26440-00

Spindle bearing

29-26431-00

Spindle motor assembly

29-26449-00

Spindle brake

29-26457-00

Baseplate terminator PCA

29-26426-00

Carriage

29-26432-00

Tachometer sensor

29-26433-00

Guardband sensor

29-264566-00

Interlock solenoid

29-26469-00

Carriage lock solenoid

1-4

Introduction

1.4 Diagnostics
The subsystem can be tested through the host or an individual drive can be
taken off-line and tested.

The subsystem is tested using two types of host diagnostics, listed next and
described in detail in Chapter 2.

Level III diagnostics that are run through the host supervisors
(VAX Diagnostic Supervisor on BI systems and MicroVAX
Diagnostic Monitor on MicroVAX systems).

Level IIR Data Reliability Diagnostics (BI-based host systems only)

These diagnostics isolate problems to a simple corrective action or to one of

two failed items: an RV20 drive or the communication path to the host.
The drive subsystem controller has a set of basic self-tests that are implemented on power-up. Test results are shown in the series of LED indicators on
the board. This power-up sequence is described in Chapter 2.
When an RV20 drive is isolated as the failed item, a failure code and subfailure
code (when one applies) are also called out by the diagnostic. These codes correspond to the codes listed in Chapter 3 of this guide. Chapter 3 outlines specific
corrective actions to take to correct problems in an RV20 drive.

1.5 Tools and Equipment
There are no special tools or equipment needed to repair the RV20 subsystem,
but be sure you have a static kit.

You cannot use customer media to run some of the tests. You will need a dedicated diagnostic test disk to run the Level III tests on the subsystem. Chapter
2 gives instructions on how to create a dedicated diagnostic test disk from a
blank disk. If you are running tests on a multidrive subsystem, it is recommended that you have one test disk for each drive in the subsystem.

Introduction

1-6

1.6 Related Documentation
Table 1-2 lists documentation related to the RV20 subsystem.
Table 1-2 Related Documentation
Manual

Part Number

Description

RV20 Optical Disk

EK-ORV20-OM

Customer document that explains

Subsystem Owner’s

- the basic operations of the

Manual

RV20 drive. Instructions are given
in this manual for loading, unload-

ing, and write-protecting disks.
This manual also contains basic
maintenance and testing
information,

RV20 Optical Disk

EK-ORV20-IN

Subsystem Installation
Guide

Contains instructions for
installing an RV20 subsystem at
a customer site from unpacking
through verification. This manual
also contains basic power-up confi-

dence checks on the system, as
well as instructions for installing

an add-on RV20 to an existing
subsystem.

1.7 Drive Operation
The front, maintenance, and rear panels of the RV20 drive are shown in
Figures 1-3, 1-4, and 1-5. The following paragraphs describe the panels.

1.7.1 Front Panel
The front panel (Figure 1-3) consists of the cartridge door, the filter grill, the
operator panel and the maintenance panel. These are described next.

Cartridge door — When opened, allows for a disk to be inserted into the drive.
When closed, protects internal parts of the drive from exposure to dust and

dirt.
Filter grill — Houses the air filter, which protects the internal components of

the drive from excessive dust and dirt. The filter should be inspected regularly,
cleaned as needed, and replaced when frayed or damaged.

1-6

Introduction

Figure 1-3 RV20 Front Panel

DOOR

CARTRIDGE

\‘k dlilglilt]all]

E—

DISPLAY

tart Write
top

PR—

Protect

—J

TMSCP
UNIT

FILTER
GRILL

D HEE

MAINTENANCE
PANEL ACCESS

NUMBER

Power

DOOR

)
OPERATOR PANEL

SHR-0308-87

Operator panel — The operator panel consists of a hexadecimal display,
Start/Stop-Ready switch/indicator, Write Protect switch/indicator, and Power

indicator/address plug. Table 1-3 lists these controls and indicators and describes their functions.

TMSCP unit number — This recessed area on the front panel is for the numbered labels that correspond to the TMSCP unit number you assign during installation.

Maintenance panel access door — Allows access to the maintenance panel.
which is shown in Figure 1-4. Table 1-4 describes all the switches and indicators on the maintenance panel.

Introduction

1-7

Table 1-3 Operator Panel Controls and Indicators

Switch/Indicator
Hexadecimal display

Type/Color
@ 2 red LEDs

Action
This display gives a 2-digit
hexadecimal status code.

When a failure is detected

during normal operation, FA
is displayed and the drive

stops functioning. During a

diagnostic session, this display flashes test results.

Start/Stop switch

2 position pushbutton

Pressing this switch in (the
Start position) will cause the
spindle motor to spin the

disk up to speed.
When this switch is in the

Start position, pressing this
switch out (the Stop position)

will cause the spindle motor
to spin the disk down.

Ready indicator

Green LED

When on, indicates that

(located on the

the spindle motor is up to

Start/Stop switch)

speed.
When flashing, indicates

spindle is in the process of

spin-up or spin-down.
When off, indicates that spin-

dle motor is off.

1-8

Introduction

Table 1-3 Operator Panel Controls and Indicators (Cont)
Switch/Indicator

Type/Color

Write Protect

2 position pushbutton

Action

Pressing this switch will
prevent any writing to the

Switch

disk inside the RV20.

When on, indicates that

Write Protect

Yellow LED

Indicator

(located on the

the disk inside the RV20

Write Protect switch)

is write protected. This indi-

cator will be on regardless of

which of the two methods of
write protecting a disk has
been used (host command,
Write Protect switch, or with

the Write Protect tab on the
disk cartridge).
Power indicator

Address plug

Green LED

This light is on when

(located on the

power is present inside

address plug)

the drive.

Switchcap

Labelled on top with control

module (CM) number. The
front bezel must be removed

to see the CM number that a

drive has been assigned.

Introduction

1.7.2 Maintenance Panel

The maintenance panel (Figure 1-4) is located behind the maintenance panel
access door on the front panel. It contains a two-digit hexadecimal display and
the controls and indicators described in Table 1-4.
The hexadecimal display is used to display data input to the drive. This data
includes test options, test numbers, test parameters, and memory locations.
The display goes blank while you press the ENTER key, indicating the drive

has received the input data. When appropriate, the drive outputs data (on the
display) in reply to the inputs. If an invalid test number is input, the display
flashes three times and FF is displayed in the operator panel hexadecimal display.

During diagnostic testing, two-digit (hexadecimal) test and subtest numbers display. Diagnostic testing is described in more detail in Chapter 3.
Figure 1-4 RV20 Maintenance Panel
HEXADECIMAL
DISPLAY

INCR MSD

KEY

INCR LSD

/ KEY

ENTER KEY

[:I [:I

START/STOP KEY

AND INDICATOR \*E] E:}'._V AND INDICATOR
DISP MEM KEY —

AND INDICATOR

Ao]

;

F1 KEY AND /
INDICATOR

CE MODE KEY

AND INDICATOR

\ MASTER

RESET KEY
SHR-0335-87

1-10

Introduction

Table 1-4 Maintenance Panel Controls and Indicators

Control/Indicator

Description

Purpose

Comment

Hexadecimal
display

LED

Displays data
inputs and

Blanks while you
press the ENTER

outputs

key.

INCR MSD key

Membrane key Increments
most significant

digit of the

The data input is
represented as a
hexadecimal value from

hexadecimal

0 to F. It is dis-

display.

played as the left
or most significant

digit in the
2-digit hexadecimal

display.

Stepped or continuous.
key pressing cycles
the digit from O to F,

restarting at 0 once
F is reached.

INCR LSD key

Membrane key Increments

The data input is

hexadecimal

represented as a
hexadecimal value
from 0 to F. It is

display.

displayed as the

least significant
digit of the

right or least

significant digit
in the 2-digit
hexadecimal display.
Stepped or continuous

key pressing cycles
the digit from 0 to F,
restarting at 0 once

F is reached.

Introduction

1-11

Table 1-4 Maintenance Panel Controls and Indicators (Cont)
Control/Indicator

START/STOP key

= Description

Purpose

Comment

Membrane key When in Idle
mode, pressing

this key begins
execution of a
diagnostic test

or validates an

option.
When in Run mode,

pressing this key
stops execution

of the diagnostic
test currently
running.

When in Stopped
mode, pressing

this key restarts

the test or
subtest.

START/STOP

LED

indicator

INluminates to

Located in the

indicate the

START/STOP key.

START/STOP key Flashes while a

ENTER key

Membrane key

has been

test or subtest

pressed.

executes.

This key causes

Selecting a test

the firmware to

in Stopped mode

save the data

terminates the

byte currently

current test and

displayed on the

places the

maintenance

subsystem in Idle

panel.

mode.

Pressing this key

The new test number

exits Stopped

replaces the last

mode and enters

test number

Idle mode,

entered.

allowing
selection of a
test or option.

1-12

Introduction

Table 1-4 Maintenance Panel Controls and Indicators (Cont)

Control/Indicator

Description

Purpose

Comment

ENTER indicator

LED

Blanks while

Located in the

the ENTER key

ENTER key.

is pressed.

DISP MEM key

Membrane key When in Idle

When in Display

mode, pressing

mode after a

this key enters

memory location

the Display mode.
This allows a

or parameter is
displayed, pressing

memory or

the key returns

parameter

the drive to

location to be

Idle mode.

displayed and/or
modified.

DISP MEM
indicator

LED

When in Stopped

When in Display

mode, pressing

this key enters

the key returns

Display mode.

the drive to
Stopped mode.

Illuminates when
DISP MEM key

Located in the
DISP MEM key.

has been pressed.

CE MODE key

Membrane key When in Normal

All maintenance

mode, pressing

panel functions

this key enters

except master reset

the CE mode.

are enabled or

disabled via the
CE mode key.

Introduction

1-13

Table 1-4 Maintenance Panel Controls and Indicators (Cont)

Control/Indicator

Description

CE MODE

LED

indicator

Purpose

Comment

Illuminates to

Located in the

indicate the

CE mode key:.

RV20 is in CE

mode.

Upon entry of CE
mode, all maintenance
panel indicators

illuminate while the
hexadecimal display

cycles through 00,
11, 22, ... FF. This

is followed by a similar

check of the operator
panel hexadecimal

display.
F1 key

Membrane key If yourun a
diagnostic
in Stopped or
Idle mode and
an error is

encountered,
pressing this
key displays

subfailure codes
on the operator

panel.
When in Display
mode, pressing

this key displays

the most significant
byte of the current
memory address on

the operator panel.

1-14

Introduction

Table 1-4 Maintenance Panel Controls and Indicators (Cont)
Control/Indicator

Description

F'1 indicator

LED

Purpose

Comment

INluminates when

Located in the F1

the F1 key has

key.

been pressed.

Master Reset key

Membrane key Pressing this key

This key can be used

causes the RV20

anytime, regardless

to go through

of current

a power-up reset

operations.

sequence.

1.7.3 Rear Panel
The rear panel (Figure 1-5) consists of the following.

Circuit breaker (CB1) — CB1 is used to apply power to the RV20. This breaker

will trip in the event of a serious current or voltage problem.

AC input connector (J20) — This connects the power cord to the 874 power
controller.

Ground strap (E2) — All RV20 drives must be fitted with a ground strap.
LESI connector (J61) — This connects the master drive to the KLESI adapter
in the host via the BC17Y-XX LESI interconnect cable.

ISI IN connector (J18) — In the RV20 master drive, this connector terminates
at J19. In a daisy-chain configuration, the ISI interface cable connects from the

previous drive to this connector.

IST OUT connector (J17) — In a daisy-chain configuration, the ISI interface
cable connects from this connector out to the next drive. This connector must
be terminated at J62 when it is the last slave in a daisy-chain configuration or

‘on a one-drive subsystem.

Master terminator connector (J19) — A terminator assembly must be installed
in J19 (from J18) for the master RV20 in a subsystem (including a subsystem

~ that consists of one drive).

Slave terminator connector (J62) — A terminator assembly must be installed in
J62 (from J17) for the last slave drive in an RV20 subsystem (this includes a
subsystem that consists of one drive).

Introduction

1-15

Figure 1-6 RV20 Rear Panel

[

LESI

ISI'IN

INTERFACE

CONNECTOR

J18

CB 1

GROUND
STRAP
E2

pini

MASTER
TERMINATOR
CONNECTOR

AC POWER
CONNECTOR
J20

J19

IS1 OUT

CONNECTOR
J17

SLAVE
TERMINATOR
CONNECTOR
J62
SHR-0283-87

1-16

Introduction

Chapter 2
Subsystem Testing

2.1 General
This chapter gives instructions on how to run tests on the RV20 subsystem.

Paragraphs 2.2 and 2.3 give instructions on running Level III diagnostics
through the VAX Diagnostic Supervisor (VDS) and MicroVAX Diagnostic
Monitor (MDM). The Level III diagnostics are run in standalone mode; the system must be taken off-line to run them. These tests detect errors and specify
one of the following failed items.

An RV20 drive

The communication path to the host

When an RV20 drive is isolated as the failed item, a failure code and subfailure
code (when one applies) are also called out by the diagnostic. These codes correspond to the codes listed in Chapter 3 of this guide. Chapter 3 outlines specific
corrective actions to take to correct problems in a RV20 drive.

Paragraph 2.4 gives instructions on running the extensive Level IIR Data
Reliability diagnostics for BI systems. These data reliability diagnostics can
only be run in user mode.

Paragraph 2.5 gives instructions on running the on-line Level Il DUP tests and
Paragraph 2.6 gives information on VMS error logs. Paragraph 2.7 describes
the power-up test the drive subsystem controller module performs when a master RV20 is powered up.

Subsystem Testing

2-1

2.2 Running Level lll Diagnostics Through VDS
On Bl-based systems, the Level III diagnostics are run through VDS. Level III
diagnostics can only be run in standalone mode. The system must be taken

off-line to run Level III diagnostics.

2.2.1 Equipment
To run Level III diagnostics, EVRVA must be available in the Field Service

account or on a loadable device.
You must also use your own test disk to test drives; never use customer media

for testing. A test disk can be created from a blank disk with test 32. Make

sure that the drive to be tested has a test disk installed and the Start/Stop
switch is pressed in.

2.2.2 HELP
Help is available throughout VDS. Typing HELP will display a list of topics

that have on-line help. Typing HELP followed by the desired toplc or command
will display information about that topic.

Additional information can be obtained from the host system documentation

and also the VAX Diagnostic Supervisor User’s Guide (EK-VXDSU-UG).

2.2.3 Bringing VDS Up and Loading EVRVA
Begin the test session by running the Diagnostic Supervisor. Entry into the
Diagnostic Supervisor is indicated by the DS > prompt.
Load the Level III diagnostics with the following command and press the

RETURN key (<CR>).

DS>

LOAD

EVRVA

<CR>

DS>

When the diagnostics are loaded, the DS > prompt comes up.

2.2.4 ATTACH and SELECT
The ATTACH command is used to specify a device on the system under test.
A device cannot be accessed by VDS unless it has first been ATTACHed.

2-2

Subsystem Testing

Before the RV20 can be tested, its type, location, and characteristics must be
ATTACHed. The subsystem is connected to the drive subsystem controller in
the master RV20. The master connects to the KLESI-B adapter in the host,
which is connected to the processor. The complete path from processor to device must be established with two ATTACH sequences before testing can begin.
To ATTACH the subsystem, use the following standard ATTACH sequence for
all VDS diagnostic packages.

ATTACH DEVICE_TYPE DEVICE_LINK DEVICE_NAME BI

NODE #

The ATTACH sequence can be entered on one line or you will be prompted for
each parameter in the command.
Example:

DS>

ATTACH

DWBLA

ATTACH

<CR>

HUB

BLAO

<CR>

DS>
or

DS>

Device Type? DWBLA <CR>
Device Link? HUB <CR>
Device Name? BLAO <CR>
BI NODE # (HEX)? 4 <CR>
DS>

The first ATTACH sequence is successful when the DS > prompt reappears

without any error messages. The next ATTACH sequence has the following
format.

ATTACH DEVICE_TYPE DEVICE_NAME DEVICE CSR_ADDRESS VECTOR BR

Because the subsystem has been ATTACHed with the first ATTACH command
string. the supervisor now recognizes the DEVICE_TYPE as RV20. The
DEVICE is the logical name of the controller (MUXX). Further, you must
know the CSR and vector addresses, as well as the BR level because they are
also part of the command string.

Subsystem Testing

2-3

Here is an example of the second ATTACH sequence. Remember, the ad-

dresses are probably different for your subsystem.

DS>

ATTACH

RVZ20

BLAO

MUAO

774500

300

<CR>

DS>

The second ATTACH sequence is successful when the DS > prompt reappears

without any error messages.

The next step is to SELECT the drive subsystem controller.

DS>

SELECT

MUAQO

<CR>

DS>

2.2.5 Running the Tests
When the controller is SELECTed, you can SELECT and SET the test param-

eters you want to use in this testing session.

The tests only run on drives that have disks installed and spinning. (This is the

case if the Ready indicator, located on the drive’'s Start/Stop switch, is on.)
When a set of tests is running on a multidrive subsystem, a test runs on each
drive before the next test is performed.

CAUTION
Never use customer media when running Level [ll tests. Use a

scratch disk or a dedicated test disk.
There are 32 Level III tests. Table 2-1 lists the tests and the duration of each

one. There are two sets of tests: functional tests (1 to 19) and utility tests (20
to 32). The complete functional test set takes about twenty minutes per drive
to run.

Some of the utility tests are not actually tests. Utility test 22, for example,
forces a statistical report to be printed out after the current tests are complete.

The complete set of utilities and utility tests takes between 5 and 6 hours per
drive to run.

Paragraph 2.2.6 gives descriptions of all the tests, what they do. and any equipment or user input needed for the tests to run.

2-4

Subsystem Testing

The following are some of the more common commands used in VDS.

SHOW TESTS — This command lists all the RV20 tests. Table 2-1 lists the

RV20 tests and gives the duration of each (per drive in the subsystem).

SET TRACE — Traces the test and output status of each test as it runs.
START — Runs the tests.

The complete functional test set is the default testing mode. To run the complete functional test set (tests 1 to 19), type START without any qualifiers.
DS>

START

<CR>

To run a Specific functional test, type START followed by the test number. For
example, to run test 10, type the following.

DS>

START/TEST=10:10

<CR>

To run a series of tests in sequence, type the starting and the ending test
numbers in the test number field of the string. For example, to run tests 6
through 15, type the following.

DS>

START/TEST=06:15

<CR>

To run utility tests (tests 20 to 32), the section qualifier must be used with the
START command. The START command must be in the following format.
START/SECTION::UTILITY/TEST=nn:nn

If no /TEST qualifier is given in the command. the entire utility test set will

run. To run all the utility tests, type the following.
DS>

START/SECTION:UTILITY

<CR>

To run a specific utility test, include the test number in the string. For example, to run utility test 20, use the following command.

DS> START/SECTION:UTILITY/TEST=20:20 <CR>

Subsystem Testing

2-5

To run a series of utility tests in sequence. type the starting and the ending

test numbers in the test number field of the string. For example, to run utility
tests 25 through 32, type the following.

DS> START/SECTION:UTILITY/TEST=25:32 <CR>

To run a test or series of tests a specified number of times, use the PASSES

qualifier with the START command. For example, to run utility tests 25
through 32 three times, type the following.
DS>START/SECTION:UTILITY/TEST

25:32/PASSES=3

<CR>

Table 2-1 Level III Tests
Test

Test

Number Number Test

Test

(VDS)

Duration

(MDM)

Name
Functional Tests

1-4 seconds

Power-up initialization

1-4 seconds

Steps 1-4 initialization

1-4 seconds

Diagnostic SA wrap

1-4 seconds

Vector and BR level

1-4 seconds

Purge and poll

1-4 seconds

Small ring buffer initialization

1-4 seconds

Large ring buffer initialization

1-4 seconds

Get DUST status

1-4 seconds

CPU/server bus data

1-4 seconds

Internal drive microdiagnostic

8 minutes per drive

Drive spin-up

1 minute per drive

Drive spin-down

1 minute per drive

Illegal command and function

1 minute per drive

Basic seek

2 minutes per drive

Serpentine/pump seek

4 minutes per drive

17%

Basic read

2 minutes per drive

18*

Basic write

2 minutes per drive

CPU/drive bus data

1 minute per drive

Subsystem Testing

Table 2-1 Level III Tests (Cont)
Test

Test

Number Number Test
(MDM) Name
(VDS)

Test
Duration

Utility Tests

1
2
3
4
5
6
7
8
9
10
11
12
13

20
21
22
23
24
25
26
27
28
29
30
31
32

Enable RV20 firmware error logs
Update serial RAM revision level
Force diagnostic statistical report
Seek reliability
Short data reliability
Read data reliability
Data reliability spin-down/spin-up
Write data reliability
Disk allocation utility
Drive power margins
Update drive revision levels
Write protect
Initialize diagnostic test disk

< 10 seconds
< 10 seconds
< 10 seconds
45 minutes per drive
5 minutes per drive
2 hours per drive
5 minutes per drive
2 hours per drive
2 minutes per drive
20 minutes
< 10 seconds
10 seconds
2 minutes

* MDM exerciser tests

2.2.6 Test Descriptions
Functional Test 1 — Register Existence

This test first checks for the existence of the address of the IP and SA
registers for the subsystem.

If these register addresses are nonexistent, the subsystem will be dropped

from testing and the error reported.

Functional Test 2 — Power-Up Initialization

This test initiates and reports the results of the drive subsyStem controller
Level A diagnostics.

The following types of testing are performed by the Level A microdiagnostics:

EEPROM — This test checksums and verifies the integrity of the EPROM
in the drive controller.

Subsystem Testing

2-7

MPU — This test verifies basic functionality of the MPU.
RAM — This tests and verifies the integrity of the RAM.

TIMERS — The two internal programmable timers are tested and verified

to be operational.
Functional Test 3 — Steps 1-4 Initialization

Steps 1, 2, 3, and 4 of the initialization sequence are performed and all
bits are checked in the SA register to make sure the steps were completed
correctly and there were no errors.
Functional Test 4 — Diagnostic SA Wrap
The drive subsystem controller is initialized in Diagnostic Wrap mode.
Then the test floats a 1 bit through the SA register to make sure it echoes
properly. This process is then repeated, floating a 0 bit through the SA

The initialization sequence is started with the interrupt enable bit set to
verify the subsystem’s vector and BR level. The priority level of the interrupt request is also verified.

Failure of the drive subsystem controller to vector properly will cause this
test to fail. Possible reasons for an incorrect interrupt include incorrect
hardware configuration, broken hardware, and operator error (hardware attach performed incorrectly). A completed interrupt at the wrong BR level

will be reported.
Functional Test 6 — Purge and Poll

This test performs the first three steps of the initialization sequence. When
the host responds to the step 3 transition it writes a 1 bit to bit 15 of the

SA register, thereby requesting the execution of purge and poll testing.
The host then waits for the SA register to transition to 0, simulating a

“purge completed” host action. Then the host writes the SA register to 0
and reads the IP register to simulate a ‘“‘start polling” command from the
host to the port. This must be completed by the host within 100 milliseconds. The test is complete when the drive controller announces the transi-

tion to step 4 in the SA register.

2-8

Subsystem Testing

Functional Test 7 — Small Ring Buffer Initialization, Steps 1-4

The drive subsystem controller is initialized without interrupts and using
the smallest ring buffer. This is the first time that the initialization sequence is carried out to completion. Initialization with the smallest ring
buffer selected minimizes the host memory area with which the drive subsystem controller must be able to communicate and verifies basic TMSCP
communications between the host and the controller. The smallest possible
ring buffer is a buffer of two 32-bit slots.

Functional Test 8 — Large Ring Buffer Initialization

With interrupts disabled, the initialization sequence is executed with the

largest possible ring buffer selected. The largest possible ring buffer is a

buffer with 256 32-bit slots.

A failure to complete the initialization sequence without error will be reported.

Functional Test 9 — Get DUST Status

The Get DUST status test requests and tests the DUST status of each
subsystem under test for the following two specific cases.
°

No modifiers set

Illegal modifier set

DUST status is received from the subsystem under test after the program
issues the GET DUST STATUS command available in DUP. The response
packet received from the subsystem is tested against a known good mask.

If the expected and received packets do not match (excluding variable bits,
which will be discounted), an error is reported. When no modifiers are set,
the subsystem should return successful status. When modifiers are set, the
subsystem should return bad status and also indicate which byte of the
command packet is incorrect (A0Q1).
Functional Test 10 — CPU/Server Bus Data

This test transfers data from the host to the drive subsystem controller,
and then the data is transferred by the controller back to the host. The
data is compared by the host to ensure its integrity. The goals of this test
are to verify correct DUP server operation and the integrity of the data
path from the host to the controller. The transfer length varies between
one word and one kbyte and utilizes multiple host buffers to emulate nor-

mal bus transfers. This test passes if all data compares correctly and there
are no errors during the command/response exchanges.

Subsystem Testing

2-9

Functional Test 11 — Internal Drive Microdiagnostic
This test initiates and verifies correct operation of the drive microdiagnos-

tics. This test is used to verify the correct operation of the RV20 drive. It
runs all RV20 CE mode diagnostics except the 4X tests. Chapter 3 gives

‘details on the drive’s tests and the various error codes.
This test calls out only the drive itself as a failed unit. It also calls out
primary and secondary (if applicable) failure codes. These codes corresponc
to the SAM codes given in Chapter 3. Chapter 3 also lists corrective ac-

tions (usually FRU replacements) to get the drive working again. This test
passes if the drive’s internal microdiagnostics complete without error.
Functional Test 12 — Drive Spin-Up

This test verifies that the SPINUP command is operational. It passes if

the drive unit spins up properly with no errors.
Functional Test 13 — Drive Spin-Down

This test verifies that the SPINDOWN command is operational. It passes
if the drive unit spins down properly with no errors.

Functional Test 14 — Illegal Command and Function
This test issues all illegal drive ISI commands and verifies that the con-

troller will respond with an “illegal command’ response. It passes if the
illegal command is reported with the correct illegal command response

packet.
Functional Test 15 — Basic Seek
This test will seek to the last physical sector on the disk and then return

to track 0. That last physical sector address is then halved. A seek to the
new sector address is then done, followed by a return to track 0. This con-

tinues until the sector address is less than 5. This test then starts at track
0 and performs 200 two-track seeks. This test makes sure that the drive is
capable of performing a basic set of seek operations.
Functional Test 16 — Serpentine/Pump Seek
This test performs a serpentine seek pattern on the disk. It is used to

verify that the drive is capable of performing a complex set of seek operations. This test passes only if all seeks are completed with no errors.

2-10

Subsystem Testing

Functional Test 17 — Basic Read (Non-blank Disk Required)
This test reads and verifies data from the first 16 sectors after BOT. If a
diagnostic test disk is used, known data patterns will be read, allowing for
data comparisons. If a nondiagnostic test disk is used, data will be read
and stored in a buffer. Another read will be performed and the data read
will be compared against the data in the buffer. This test verifies that the
drive can read data consistently.

Functional Test 18 — Write Data (Diagnostic Test Disk Required)
This test will write one sector of each of 16 data patterns at the end of
any previously written data. The test will then read verify that the data is
correct. This test passes when all data is written to and read from
correctly.

Functional Test 19 — CPU/Drive Bus Data

This test transfers data given by the host to the RV20 drive subsystem
controller’s data buffer, and then reads the data back to the host. The host
software verifies that the data transferred is correct. This test utilizes multiple buffers and emulates normal transfers from the drive to the host.

Utility Test 20 (Utility Test 1 in MDM) — Enable RV20 Firmware Error Logs
This is not a test, but an instruction to enable the firmware error logs to
be printed out during the test session.

Utility Test 21 (Utility Test 2 in MDM) — Update Serial RAM Revision Level
This utility reads and updates the controller revision level in the controller
serial RAM. The program reads and displays the current controller revision
level for the operator, and then prompts the operator for the new controller revision to be written into the controller serial RAM. Both values are in
decimal. <Ctrl/C> can be used at any time to exit this utility.
Utility Test 22 (Utility Test 3 in MDM) — Force Diagnostic Statistical Report
This is not a test but a command to force a statistical report after the
current testing session ends. The statistical report contains information
pertaining to the performance of the drive during the tests. This report
also calls out the failed FRU in the event of a failed test.

- Utility Test 23 (Utility Test 4 in MDM) — Seek Reliability
This tests the drive to the specified seek error rate by issuing 105 seek

commands. It is used to verify that the drive has no errors in 105 seeks.
This test passes only if no errors are detected in 10° seeks.

Subsystem Testing

2-11

Utility Test 24 — Short Data Reliability (Non-blank Disk Required)
This test reads known diagnostic data patterns on the test disk for a
five-minute period of time. If sufficient tracks have not been written on the

test disk, the test starts over at BOT and continues testing until approximately five minutes have elapsed. This test verifies that the drive can read
data properly. It can also run on a nontest disk by reading a sector of data
twice and comparing the two buffers returned. Data compares are performed as much as possible, but the test tries to keep the drive streaming.
This test passes if no hard errors are detected. The read reliability rate is

not calculated by this test.

Utility Test 256 — Read Data Reliability (Non-blank Disk Required)
This test reads known diagnostic data patterns on the test disk. If suffi-

cient tracks have not been written on the test disk, the test starts over at
BOT and continues testing. The complete test takes approximately 30 minutes per drive and keeps a statistical error log. To have confidence that the

read error rate has been met, this test must be run for five passes. This
test passes if no hard data or functional errors occur. If one of these errors
does occur, then the test is aborted. This test takes significantly longer

(possibly twice as long) if the diagnostic disk is not used.
NOTE
When invoked individually, this test can be used to perform extensive drive compatibility testing by swapping the disk cartridge with a disk cartridge written in another drive.

Utility Test 26 (Utility Test 7 in MDM) — Data Reliability Spin-down/Spin-up
(Non-blank Disk Required)
This test performs a read data reliability test (similar to test 25) for a random period of time. Next, the drive is spun down. After a period of not
more than seven seconds, the drive is spun back up. This cycle repeats for

approximately five minutes. This test verifies that data reliability is not
affected by the constant spin-up and spin-down of the drive motor. It
passes only if there are no hard data errors, compare errors, or errors of
any other type.

2-12

Subsystem Testing

Utility Test 27 — Write Data Reliability (Test Disk Required)
This test verifies the write reliability of not more than 2.3% of the available sectors. The drive’s direct read during write capability verifies that the
data is written correctly. The data patterns written are diagnostic data patterns. This test must be specifically invoked and should only be executed if

the write error reliability of the drive is in question. Each pass of this test
fills a large portion of the free sectors. This test passes if there are no

hard data or functional errors. To have confidence that the write error rate
has been met, this test should be run for five passes.

Utility Test 28 (Utility Test 9 in MDM) — Disk Allocation Utility (Non-blank
Disk Required)

This test reads the entire disk and indicates the number of retired blocks

and the amount of usable space available on the disk. It does not perform
data compares of the data on the disk. The test time is dependent on the

amount of data on the disk. This test passes only if there are no hard data
errors, or errors of any other type.

Utility Test 29 (Utility Test 10 in MDM) — Drive Power Margins (Test Disk
Required)

This utility allows the operator to do a test of the subsystem’s voltage

margining capability. This utility tests the subsystem by running the
drive’s internal microdiagnostics (test 11) using +/- 5% offsets to the

power supply voltages (+5, -5, +12, -12). This test verifies that the drive’s
power margining is within specifications. It passes when the unit completes
it without error.

Utility Test 30 (Utility Test 11 in MDM) — Update Drive Revision Levels
This utility reads/updates the drive’s top revision level and reads the

drive’s serial number. This utility does not run by default.
Utility Test 31 (Utility Test 12 in MDM) — Write Protect (Test Disk Required)
This test verifies the write protect functionality of the disk cartridge and

disk drive switch. This test is not run as part of the basic test sequence
and must be specifically invoked due to the manual intervention required
for setting the write protect conditions. It passes only if the drive cannot
be written to when write protect is enabled, and can be written when write
protect is disabled.

Subsystem Testing

2-13

Utility Test 32 (Utility Test 13 in MDM) _ Initialize Diagnostic Test Disk
(Blank Disk Required)

This test creates a diagnostic test disk from a blank disk. If the disk is not
blank, you are prompted as to whether you wish to create a diagnostic test
disk. Once a test disk is created, any data previously on the disk is lost.
The test creates a test disk by formatting the disk using the ANSI tape

format, writing 1000 sectors of data patterns on the disk.
If an error code of 1B (hex) was returned during a previous read test, this

test must be run to reformat the disk. Once this test is run, the disk will
always be a diagnostic test disk.

2.2.7 Error Reporting
If an error report is requested when setting up the tests, four numbers are

called out in an error report. They are the message field, error class, error

code, and the procedure where the error occurred (the “where’”’). The where information has to do with TMSCP protocol, which is proprietary information of
Digital Equipment Corporation. The other three numbers are given in the fol-

lowing tables: Table 2-2, Message Fields: Table 2-3, Error Classes: and Table
2-4, Error Codes.
Table 2-2 Message Fields*
Field

Meaning

Bit 7

Set if diagnostic test is being aborted.

Bit 6

Set if command causing error is

Bit 5

Set if command causing error is an ISI command.

a TMSCP command.

Bits 0-4:

-0000 0000

Diagnostic test exit status is normal. Command was completed successfully with no error logs.

0000 0001

0000 0010

Diagnostic test has completed successfully.

Packet contains only an error log (no error code or error class
in report).

0000 0011
0000 0100

Packet contains only the error code.
Packet contains the end message information from a TMSCP
command.

0000 0101

Packet contains the end message information from an ISI
command.

2-14

Subsystem Testing

Table 2-2 Message Fields* (Cont)
Field

Meaning

0000 0110

An expected error was found.

0000 0111

Unexpected message from controller and/or drive unit.

0000 1000

Diagnostic abort is pending.

0000 1001

Diagnostics were unable to send to host.

0000 1010

Write protect information is provided.

0000 1011

Disk capacity information is provided.

0001 0000

Diagnostic test not available.

0001 0001

Results of the internal drive microdiagnostics.

0001 0010

The illegal command given to the drive was not handled
properly.

0001 0011

The packet contains byte compare error information.

0001 0100

The test is ready to receive data from the host.

0001 1111

The packet contains test data.

* The diagnostic prints these values in hex.
Table 2-3 Error Classes

Class

Meaning

No error

Seek error

Drive error

Drive status

Data error

Status error

Last fail error

Unexpected error number

System service error
Controller error

Formatter error

Host buffer access error
Serious exception
Tape transfer error

0D
OE

Subsystem Testing

2-15

Table 2-4 Error Codes

Code

Meaning

Invalid I/O channel was specified

Invalid interrupt type

Invalid service

Invalid number of seconds specified

Buffer pointer was a null pointer

Task name was invalid

Task is already created

Device being opened is an unknown device

Device specified is already allocated

Item code for information about an I/O device was invalid

Data buffer pointer was lost

Data buffer counter is bad

Host packet was not present when expected

An invalid command number was given

There was no room to store a reference to a local data buffer

No data buffer in the DB information block left

Command information was lost

Data pattern numbers do not agree

An illegal pattern number was specified

A sector read error occurred

The drive was in the wrong position for the read

Invalid data pattern format (Run Initialize Diagnostic Test Disk util-

ity to reformat disk.)
1C

Diagnostic code bug

Requested drive is unavailable

Fatal drive error occurred

Unit is spun up

Unit has a volume mounted

Unit is write protected

Unit has a duplicate unit number

Start/Stop switch is out

Write Protect switch is in

Unit has a blank disk mounted (a blank disk should not be mounted)

Unit does not have a blank disk mounted (a blank disk should be
mounted)

Unit does not have a diagnostic disk mounted

Unable to send to host

2-16

Subsystem Testing

Table 2-4 Error Codes (Cont)
Code

Meaning

Unit has a fault condition

Unit does not have a blank or diagnostic disk mounted (a blank or
diagnostic disk should be mounted)

Unit does not exist

Drive is still connected

Duplicate TMSCP unit number

Drive is already on-line

Drive is still on-line

EOT encountered

Drive is still on-line — unload ignored

Unit is unknown

No volume

Unit is inoperative

Unit is disabled

60
61

Unit is hardware write protected
Unit is software write protected

Unit is data safety write protected

Long gap encountered

Unrecoverable read error

Post field detected
Overwrite attempted

73
74

Soft write error

Soft read error

76
77
78
79
TA

Recoverable hard read error
ECC read error
Unrecoverable read error
Secondary revector control table used

Bad media limits found
End of media found

Secondary replacement area used

Unknown host buffer
Odd transfer address

Odd byte count

Nonexistent host memory

Parity error

85
86

Invalid page table entry
Compare modified read or write error

Subsystem Testing

2-17

Table 2-4 Error Codes (Cont)
Code

Meaning

Controller code bug

Drive has available status

Unrecognized error log event code

Unrecognized error log format code

Inconsistent internal control structure

LESI parity error from LESI adapter to drive subsystem controller

LESI parity error from drive subsystem controller to LESI adapter

Drive subsystem controller memory error

Drive command timeout

Controller-determined transfer error

Position error

Drive detected error

Controller-determined protocol error

Drive failed initialization

Drive ignored initialization

Drive clock dropout

Controller detected state parity error

Drive seek retry applied

Soft seek error

Not a tape format

No secondary revector control table

Secondary revector control table is full

No secondary replacement area

Secondary replacement area is full

Invalid message length

Invalid command

Command aborted

Compare error

BOT encountered

Tape mark encountered

Record data truncated

Position lost

Serious exception

LEOT detected

Message from internal diagnostic

Formatter error

2-18

Subsystem Testing

The following are two examples of error reports generated by the diagnostics.
The first example calls out the error that occurred and then names the drive
that failed (Drive 2). The report begins with the name of the test that failed

(Test 11: Internal Drive Microdiagnostic Test) and also includes a message field
(Message: 11).

Table 2-2 lists the message fields in binary code. When you convert 11 hex to
binary, the result is 0001 0001, Table 2-2 defines this field as “Results of the
internal drive microdiagnostics.”

In this example, both primary and secondary fault codes were generated after
the message field (7B and 01, respectively). These codes correspond to the

SAM failure and subfailure codes described in Chapter 3 of this guide.

Test

11:

Internal

Drive Microdiagnostic

System Service error occurred on RV20
ALl values are printed in Hexadecimal
Port (drive) being tested is: 02

Message:

Secondary

Fault

Code:

Primary

Bytes in Error:
Seek Retry Applied:
Hard Seek Errors:
Recov Hard Read Errors:
Data Error Count:
ECC Error Count:
Kbytes read:
Sectors Addressed:
1 x 10_9 Writes:

Test

subsystem

Fault Code:

0000
0000
0000
0000
0000
0002
000007FO
0000FQ001C
0000

Soft Seek Errors:
Soft Write Errors:
Recov Soft Read Errors:
Nonrecov Read Errors:
Other Drive Errors:
Retry Count:
Kbytes Written:
1 x 10_5 Seeks:
1 x 10_9 Reads:

0000
0002
0000
0000
0002
0000
00000cC67
0000
0000

The next example calls out the error that occurred and then names the drive
that failed (Drive 2). The report begins with the name of the test that failed
(Test 29: Drive Power Margins Test) and also calls out message field, error
class, error code, and “where’” information relative to the error that caused the
test to fail.

In this example, message field 88 is called out, indicating that the diagnostic
aborted (Table 2-2). Error class 02 is called out. indicating that a drive error
caused the problem (Table 2-3). And error code 2A is called out, indicating that
a diagnostic test disk was not mounted in the drive (Table 2-4). In this case,
you would insert a test disk in the drive and run the test again.

Subsystem Testing

2-19

Test

29:

System

AlLL

Drive

Service

values

Port

are

(drive)

Power

Margins

error

occurred

printed

being

tested

on RV20
Hexadecimal

is:

Message:

Error

Where:

Code:

Bytes

Seek

Retry

Hard

Seek

Error:

Recov

Hard

Data

Error

ECC

Error

Kbytes

10_9

subsystem

02
-

class:

02
XX

0000

Soft

Seek

0000

Soft

Write

Errors:

0000

Recov

Soft

Read

0000

Nonrecov

0000

Other

Drive

0002

Retry

Count:

Applied:
Errors:

Count:
Count:

read:

Sectors

Test

Addressed:

Writes:

Errors:

0002

Read

0000

Read

Errors:

000007FO

Kbytes

0000FO001C

10_5

Seeks:

10_9

Reads:

0000

Errors:

Written:

0000
0002
0000

00000cC67
0000

0000

2.3 Running Level lll Diagnostics Through MDM
On the MicroVAX, the Level III diagnostics are run through MDM, The system must be taken off-line to run MDM.

2.3.1 Equipment
To run the RV20 diagnostics under MDM, you need the version of MDM that

contains the RV20 diagnostics.
You must also use your own test disk to test drives; never use customer media
for testing. A test disk can be created with test 13. Make sure that the drive

being tested has a test disk installed and the Start/Stop switch is pressed in.

2.3.2 HELP

Help
is available throughout MDM. Type HELP at the MDM
> > prompt and a
summary of all available commands is displayed on the screen. Additional information can be obtained from the host system documentation and the
MicroVAX Diagnostic Monitor User’s Guide (AA-FM7AA). A sample HELP

screen follows,

220

Subsystem Testing

2.3.3 Bringing MDM Up
To start the tests, you must first boot MDM. Once MDM is booted, the disclaimer screen appears.
MicroVAX

Maintenance

CONFIDENTIAL

System

Use

Authorized

2.xx

SOFTWARE

EQUIPMENT

Only

Version

DIAGNOSTIC

PROPERTY

DIGITAL

CORPORATION

Pursuant

Valid

Right-to-use

License

The

current

Press

the

enter

date

RETURN

the

new

(DD-MMM-YYYY
MDM>>

CLEAR

and

time

key

date

CPU_DISPLAY

FILE_NAME

continue,

and

time;

- Set

CLEAR ERROR_LOG
CONFIGURE

c¢sr

4-MAY-1987
then

14:04:56.88

press

the

RETURN

key.

HH:MM]:

HELP

CONNECT

is:

the

CPU display to O.

Clear the
Configure

file_name VECTOR

error logs.
the system.

vector

Assign

CONTINUE
DISABLE
DISABLE ALL

Proceed
Disable
Disable

ENABLE
ENABLE

Enable
Enable

diagnostic_name
diagnostic_number
:

Enable the execution of a diagnostic.
Enable the diagnostics indexed by the
number.

HALT
IGNORE csr
RESTART
SELECT
SELECT diagnostic_name
SELECT diagnostic_number

DISABLE diagnostic_name
DISABLE diagnostic_number

ENABLE
ENABLE
EXIT

ALL

Disable
Disable

BR_LEVEL br_Llevel

diagnostic

CSR.

from MDM CTRL-C>>.
selected diagnostics.
all the diagnostics.
the execution of a diagnostic.
the diagnostics indexed by the

number.

Exit

selected diagnostics.
all the diagnostics.

from

MDM.

Stop diagnostic execution with cleanup.
Don’t load a diagnostic for CSR.
Return to the main menu.
Select the following diagnostic.
Select the indicated diagnostic.
Select the diagnostics indexed by the
number.

Subsystem Testing

2-21

SELECT
SET

BELL
BELL

Select

OFF
ON

CLOCK

the

Disable

DD-MMM-YYYY

Enable

HH:MM

Set

following

bell

the

DETAILED_MESSAGE

OFF

Disable

DETAILED_MESSAGE

Enable

diagnostic

system

the

diagnostic.

diagnostic

error.

clock.

display

detailed

messages.

ERROR

CONTINUE

Set

continue

ERROR

HALT

Set

halt

SERVICE

Set

the

testing

mode

service.

VERIFY

Set

the

testing

mode

verify.

Set

the

MODE

PASSES

number

PROGRESS

BRIEF

Enable

brief

PROGRESS

FULL

Enable

full

PROGRESS
SECTION

TEST

OFF

error.

passes.

progress
progress

messages.
messages.

Disable

progress

EXERCISER

Set

the

test

section

FUNCTIONAL

Set

the

test

section

functional.

UTILITY

Set

the

test

section

utility.

ALL

Enable

all

messages.

tests

that

exerciser.

match

section

and

mode.

Enable

test_range

tests
3-5.

1,
TIME

SHOW

DDDD

HH:MM:SS.CC

Set

the

total

test_range,

execution

BUS

Show

the

active

CLOCK

Show

the

current

CONFIGURATION

BRIEF

Show

ERRORS

the
Show the
Show the
Show the
lLevel.
Show the
Show the
Show the
Show the
Show the
Show the

MEMORY

Show

FULL
DEFAULT
DEVICE

DEVICE

FRU

DEVICE

TESTS

DEVICE

UNITS

DEVICE

UTILITIES

DISCLAIMER

START

the

CSRs

date

for

time.
the

and

bus.

time.

system

configuration.
full system configuration.
current settings.
device’s CSR, vector, and BR

device’s

FRUs.

functional and exerciser
device’s units.
utility

message.

accumulated

errors.

system

memory

Start

the

selected

usage.

diagnostic.

ALL
diagnostic_name

Start

all

the

Start

the

indicated

START

diagnostic_number

Start

the

diagnostic

enabled

diagnostics.

diagnostic.

indexed

number.

diagnostic
diagnostic

ENABLE ulist
DISABLE ulist

2-22

Subsystem Testing

Enable or Disable unit testing.
ulist:

tests.

disclaimer

START
START

UNITS
UNITS

example,

3-5

etc.

the

Input the date and time at the disclaimer screen. The display echoes the date
and time you typed in and then asks if you want to enter menu mode.
Enter Menu mode by typing 1 and pressing the RETURN key. Proceed to
Paragraph 2.3.4 for details on Menu mode.

If you don't want to enter menu mode, press the 2 key and RETURN. The
following screen is displayed.
The

current date and
Do

want

you
1
2

time

is:

the

enter

4-MAY-1987 14:05:02.18

mode?

Yes
No

Type the number;

then press the RETURN key.

> 2

CAUTION: You are about to enter command line mode
There are no menus once you enter this mode.
Refer to the MDM User’s Guide for detailed instructions.

return to the menu mode from command

type

Line mode

"RESTART"” and press the RETURN key, or reboot the system.

Type 2 and press

or type 1

the RETURN

key to proceed,

and press the RETURN key to enter menu mode. > 2

MDM>>

Press 2 and RETURN to enter command line mode, where tests can be set up
> > prompt is displayed, signifying that you are in the
and run. The MDM
MicroVAX diagnostic monitor.

> > prompt, type CONFIGURE and then press RETURN. When
At the MDM
> > prompt comes up. At that prompt,
the configure is done, another MDM
select the RV20 you want to test and then press RETURN.
MDM>>
MDM>>
MDM>>

CONFIGURE <CR>
SELECT RVZ20A <CR>
.

> > prompt displays again. you may begin testing the RV20
When the MDM
subsystem. Proceed to Paragraph 2.3.5.

Subsystem Testing

2-23

2.3.4 Menu Mode
If you choose to enter menu mode, the Main Menu is displayed.

MAIN

Test

the

system

Display

System

Display

the

System

Display

the

Service

Exit

MicroVAX

Configuration
Utilities

and

Devices

Maintenance

System

Option 1 performs basic Verify mode testing (no write operations) on the RV20
subsystem as well as the other selected devices on the system.
Option 2 displays the current system configuration and lists the devices the
CPU recognizes on the system. This allows you to quickly check the system. If
a device physically present on the system is not listed on the system configura-

tion and devices display, then there is a problem.

Option 4 selects the Service Menu. This is the option to select when you want
to run RV20 diagnostics.

MAIN

SERVICE

CAUTION:

This

personnel
1

Set

Exercise

Display

Enter

Type
or

2-24

the

type

test

and

the

system

Subsystem Testing

message

the

for

use

commands

qualified

could

service

destroy

data.

parameters

continuously

device

commands

then

press

intended

Misuse

system

number;
0

only.

press

the

RETURN

RETURN
key

key,
return

the

Main

Menu.

If you choose option 1, the basic testing parameters currently SELECTed will
be displayed. You may SET new parameters at this screen.
If you choose option 2, you will run the Service mode tests. These tests perform write operations on the diagnostic test disk. If you wish to run the
Service mode tests without overwriting data on the diagnostic test disk, press
in the Write Protect switch on the front panel of the RV20 being tested.
Another way to write protect the diagnostic test disk is to turn the Write
Protect tab on the disk to the WRITE PROTECT position.

Option 4 takes you out of Menu mode and brings you into Line mode, where
you will be at the MDM
> > prompt.

Option 3 brings you to the Device Menu, where you can select an RV20 controller from the devices available on the system. When an RV20 controller has
been selected, you can run specific tests and series of tests.
2.3.5 Running the Tests
In Line mode, once the RV20 subsystem is SELECTed, you may SELECT and
SET the test parameters you want to use in this testing session.

The tests only run on drives that have disks installed and spinning. (This is the
case if the Ready indicator, located on the drive’s Start/Stop switch, is on.)
When a set of tests is running on a multidrive subsystem, a test runs on each
drive before the next test is performed.
CAUTION

Never use customer media when running Level Il tests. Use a
scratch disk or a dedicated test disk.

There are 32 Level III tests. Table 2-1 lists the tests and the duration of each
one. There are two sets of tests: functional tests (1 to 19) and utility tests (20
to 32). The complete functional test set takes about twenty minutes per drive
to run.

Some of the utility tests are not actually tests. Utility test 19, for example,
forces a statistical report to be printed out after the current tests are complete.
The complete set of utilities and utility tests takes between 5 and 6 hours per
drive to run.

Paragraph 2.2.6 gives descriptions of all the tests. what they do. and any equip-

ment or user input needed for the tests to run.

Subsystem Testing

2-25

The following are some of the more common commands used in MDM. (Typing

HELP will display all the available commands.)
SET DETAILED MESSAGE OFF — This command gives a brief message if a

test fails (in either mode).
SET DETAILED MESSAGE ON — This comand causes a detailed error re-

port to display on the screen when a test fails.

SET PROGRESS OFF — This command does NOT give a progress report on
the screen.
SET PROGRESS BRIEF — This command gives a screen message at successful completion of a test (full number of passes). For example, if you run test
number 5 ten times, the screen displays a message after the tenth pass of the
test.

SET PROGRESS FULL — This command gives a screen message at each run

(“pass’’) of each test (regardless of whether the test passes or fails). If a test
fails, a detailed error report is given.

SET MODE VERIFY — This command selects Verify mode (functional tests 1
to 11). See Table 2-1 for test names. These tests take five to six minutes per
drive to run.
SET MODE SERVICE — This command selects Service mode (tests 1 through

19). These tests take about 16 minutes per drive to run.

SET SECTION FUNCTIONAL — This command selects functional tests 1
through 19. Verify mode runs tests 1 to 11; Service mode runs all 19 tests.

SET SECTION UTILITY — This command seleCts utility tests 20 through 32.
These are extensive tests that take between seven and eight hours per drive to
run. Reter to Paragraph 2.2.6 for more information on the utilities.

SET SECTION EXERCISER — If in Verify mode, this command selects only
one test, the basic read test. If in Service mode, this command selects only two
tests, the basic read test and the basic write test. The exerciser is used at the

same time as other devices on the system. For example, if you have a TK50
tape drive in your system. the exerciser can run an RV20 basic read test while
also running a TK50 basic read/write test.

SET TEST ALL — This command runs all tests in the mode and section selected. For example, in the functional section, Verify mode runs tests 1 to 11

and Service mode runs tests 12 to 19.

2-26

Subsystem Testing

SET TEST NN — This command runs a specific test or a specific series of
tests.

SET TEST 2 — runs test 2

SET TEST 2-4 — runs tests 2, 3, and 4
SET TEST 2,4-6,8 — runs tests 2, 4, 5, 6. and 8

SET PASSES NN — This command runs tests a specified number of times.
For example, the command SET PASSES 10 runs each test that is set to run
10 times.

SHOW CONFIGURATION — This command shows the number of RV20 controllers being tested.

SHOW DEFAULT — This command shows the current selected testing
parameters.

2.3.6 Error Reporting

If an error report is requested when setting up the tests, the codes given in the
error report define and isolate problems. Refer to Paragraph 2.2.7.

2.4 Running Level IIR Data Reliability Diagnostics
Through VDS
In Bl-based systems, extensive Level IIR data reliability diagnostics are run
through VDS. The Level IIRs can be run in user mode. The system does not
have to be taken off-line to run these diagnostics.
2.4.1 Equipment

To run the Level ITR diagnostics, EVRVB must be available in the Field
Service account or on a loadable device.

Unlike other RV20 diagnostics, you can use customer media for the Level IIR
tests. Running these tests can isolate a problem to the customer media (refer

to the description of Test 1 in Section 2.4.6.)

Subsystem Testing

2-27

2.4.2 HELP
Help is available for all the Level IIR tests. Typing HELP will display an extensive file (EVRVB.HLP) that details ATTACH sequences, device names, commands, and event flags.

Additional information can be obtained from the host system documentation

and the VAX Diagnostic Supervisor User’'s Guide (EK-VXDSU-UG).

2.4.3 Bringing VDS Up and Loading EVRVB
Begin the test session by running the Diagnostic Supervisor. Entry into the
Diagnostic Supervisor is indicated by the DS > prompt.
Load the Level IIR diagnostics with the following command and press the

RETURN key (<CR>).

DS>

LOAD

EVRVB

<CR>

DS>

When the diagnostics are loaded, the DS > prompt comes up.

2.4.4 ATTACH and SELECT
The ATTACH command is used to specify a device on the system under test.
A device cannot be accessed by VDS unless it had first been ATTACHed.
Before the RV20 can be tested, its type. location, and characteristics must be

ATTACHed. The subsystem is connected to the drive subsystem controller in

the master RV20. The master connects to the KLESI-B adapter in the host,

which is connected to the processor. The complete path from processor to device must be established with two ATTACH sequences before testing can begin.
To ATTACH the subsystem with the standard ATTACH sequence for all VDS

diagnostic packages, use the following format.
ATTACH

DEVICE_TYPE

DEVICE_LINK

|
DEVICE_NAME

NODE
#

The ATTACH sequence can be entered on one line or you will be prompted for

each parameter in the command.

2-28

Subsystem Testing

Example;

DS>

ATTACH

DWBLA

ATTACH

<CR>

HUB

BLAO

<CR>

DS>

Device Type? DWBLA <CR>
Device Link? HUB <CR>
Device Name? BLAO <CR>
BI NODE # (HEX)? 4 <CR>
DS>

The first ATTACH sequence is successful when the DS
> prompt reappears
without any error messages. The next ATTACH sequence has the following
format.

ATTACH

DEVICE_TYPE

DEVICE_NAME

DEVICE

CSR_ADDRESS

VECTOR

Because the subsystem has been ATTACHed with the first ATTACH command
string, the supervisor now recognizes the DEVICE_TYPE as RV20. The
DEVICE is the logical name of the controller (MUXX). Further, you must
|
know the CSR and vector addresses, as well as the BR level, because they are
also part of the command string.

Here is an example of the second ATTACH sequence. Remember, the addresses are probably different for your subsystem.

DS>

ATTACH

RV20

BLAO

MUAQO

774500

300

<CR>

DS>

The second ATTACH sequence is successful when the DS
> prompt reappears
without any error messages.

The next step is to SELECT the drive subsystem controller.

DS>

SELECT

MUAQ

<CR>

DS>

Subsystem Testing

2-29

2.4.5 Running the Tests
When the controller is SELECTed, you can SELECT and SET the test parameters for this test session. Paragraph 2.4.6 describes the tests, and Paragraph
2.4.7 contains information on the event flags that can be set with EVRVB.
The tests only run on drives that have disks installed and spinning. (This is the

case if the Ready indicator, located on the drive’s Start/Stop switch, is on.)
When tests are running on a multidrive subsystem, a test runs on each drive
before the next test is performed.

2.4.6 Test Descriptions
EVRVB consists of three tests: Test 1 — Basic Functional Test, Test 2 —
Basic Read Test, and Test 3 — Multiunit Test. The complete test set takes
roughly 60 minutes per drive to run.
Test 1 — Basic Functional Test

This test performs a quick verification of read operations. It should be used to

verify the integrity of customer media. It executes ONLINE with the Clear
Serious Exception Modifier set. then sets the unit characteristics, and resets
any residual errors. The order of operations is as follows.
e

Rewinds to BOT

Spaces forward to LEOT, determining file numbers

Rewinds and reads records of the first file, determining record count

Repositions by record, and ensures correct position by reading
record counts (This sequence spaces over a few records in each direction, then reads the next subsequent record to check the unit’s
honesty.)

Spaces forward to the next file, reads records of the file, and determines record count

Reverses one file, then spaces forward and rereads records of the
file, comparing against the last read

2-30

Rewinds to BOT

Spaces forward to LEOT

Rewinds to BOT

Subsystem Testing

Test 2 — Basic Read Test

This test performs a rewind, and then reads until EOT, LEOT, or fatal error is
encountered. It keeps track of the number of records per file read, and the
total bytes read. If a fatal error is encountered, a message is reported, the unit
is repositioned to BOT, and is prevented from executing further read operations. This test is a streaming type of operation. Data compares are performed during the test according to the event flags set by the user.

Test 3 — Multiunit Test (Version 1.1 and later)

This test exercises up to four available drives at a time in a sequential “round
robin’’ manner. The test executes like Test 2, and can test all drives
simultaneously.

2.4.7 Event Flags

The following event flags can be set while under Diagnostic Supervisor control,
To set an event flag, type
SET

EVENT

FLAGS

followed by one of the numbers defined below.
Event Flag Definitions

EF#4 — enables host program data compares on all read operations from the
diagnostic disk.

EF#5 — inhibits all data compares.

EF#6 — inhibits autodrop. This flag prohibits the program from dropping any
unit that has exceeded the specified failure rate. When this flag is reset, the
program drops any units that have exceeded the specified failure rate.

EF#7 — inhibits autoadd. This flag inhibits the program from picking up units
that were dropped from testing during a previous test cycle. When set, and the
program drops a unit due to an excessive failure rate, the unit will stay deselected until the operator changes the event flag or restarts the program. If
reset, the program will attempt to pick up all units previously dropped at the
start of a new pass of the test cycle.

Subsystem Testing

2-31

2.4.8 Error Reporting
When an an error occurs, a detailed error report prints out.

A sample error

report follows.

ERROR

MESSAGES

*%%***k*x*x

Pass
Soft

EVRVB

FORMAT

RV20

LEVEL

DIAGNOSTIC

1, test 2, subtest 0, error
error while testing MUAQ:

UNIT FAILED TO CORRECTLY
FAILING COMMAND: READ
DETECTING

PROCESS:

EXECUTE

1.0

****k*xkxx

18-JAN-1988

8:07:26.28

COMMAND

VMS

PREVIOUS COMMAND: READ
BYTE/ACTION COUNT: 32767,

LAST
Item

1 RECORDS/FILE
91, CURRENT FILE NUMBER:
2048

RECORD COMPLETE
Count Complete:

IEXTENDED

IPACKET

Packet

REPORT:

CONTAINED

WITHIN

ICONTENTS:

BYTES

COMMAND

ICONTENTS:

BYTES

END

Sent

THE

"P6"

BUFFER

PACKET

RESPONSE

*=*

0000003F
00000001
00000021
00001000
00023 FEQD
00000000
00000000
**

ERROR

DATA

Received

ICOMMAND REFERENCE NUMBER (LW)
IRESERVED(W)
|
UNIT NUMBER(W)
IMODIFIERS(W)
| RESERVED(B)
|
IBYTE COUNT (LW)
IBUFFER DESCRIPTORCLW)
IBUFFER DESCRIPTOR(LW)
IBUFFER DESCRIPTORCLW)

OPCODE(B)

0000003F
00000001
00081008
00001000
00000000
0000001F

ICOMMAND REFERENCE NUMBERCLW)
iRESERVED(W)
|
UNIT NUMBER(W)
ISTATUS(W)
|
FLAGS(B)
|
ENDCODE(B)
IBYTE COUNT
(HOST BYTE COUNT) (LW)
IBYTE COUNT (TAPE RECORDY (LW)
IPOSITION (OBJECT COUNT) (LW)

NOTE

Field information is clustered into 3 unique data types: (LW) =
32 bits, (W) = 16 bits, (B) = 8 bits. All packet data is in hex.

The data contained within a packet is not ‘‘indexed’’ for specific definition. Byte 6, for example, is not ‘‘keyed’’ into a specific ASCIl message. Instead, when extended error message
information is requested, the user is required to understand
the meaning of each field produced in the display.

2-32

Subsystem Testing

2.5 Running Level 2R DUP Tests Through VDS
On Bl-based systems, the Level 2R Diagnostic Utility Protocol (DUP) on-line.
diagnostic package runs under VMS and the VAX Diagnostic Supervisor (VDS).

It interfaces to the subsystem by way of the VMS DUP FYDRIVER. The pack-

age can be run in user mode, so an RV20 suspected of failure can be taken
off-line and tested without taking the entire subsystem off-line.
2.5.1 Equipment

To run Level 2R DUP diagnostics', EVRVC must be available in the Field
Service account or on a loadable device.

You should also have a dedicated diagnostic test disk in the drive you are testing, although this is not a requirement for running these tests. If desired, a
dedicated diagnostic test disk can be created with Level 2R DUP test 21. If a
diagnostic test disk is not used, some of the tests cannot run. Refer to the test
descriptions given in Paragraph 2.2.6.

2.5.2 HELP

HELP is available throughout VDS. Typing HELP will display a list of topics
that have on-line help. Typing HELP followed by the desired topic or command

will display information about that topic.

Additional information can be obtained from the host system documentation
and also the VAX Diagnostic Supervisor User's Guide (EK-VXDSU-UG).

2.5.3 Bringing VDS Up and Loading EVRVC
Begin the test session by running the Diagnostic Supervisor. Entry into the
> prompt.
supervisor is indicated by the DS

Load the Level 2R DUP diagnostic package with the following command and
press the RETURN key (<CR>).
DS>

LOAD

EVRVC

<CR>

DS>

When the diagnostics are loaded. the DS > prompt comes up.

2.5.4 ATTACH and SELECT

The standard ATTACH and SELECT sequehces are used to bring the Level 2R
DUP tests on-line. Refer to Paragraph 2.2.4 for the ATTACH and SELECT
|
command sequences.

Subsystem Testing

2-33

2.5.5 Running the Tests

The Level 2R DUP diagnostic package consists of 22 tests. The test names
and their durations are listed in Table 2-5. All the Level 2R DUP tests are also
part of the Level III tests described earlier in this chapter. Table 2-5 contains a

column that references the corresponding Level III test number from Table 2-1.
This cross reference column is provided so that you can locate test descriptions
in Paragraph 2.2.6.

Table 2-5 Level 2R DUP Tests
Level

Level

IIDUP

1III

Test

Test Name

Test Duration

Service Tests

Get DUST status

1-4 seconds

CPU/server bus data

1-4 seconds

3*
4%

11
12

Internal drive microdiagnostic
Drive spin-up

8 minutes per drive
1 minute per drive

Drive spin-down

6*
7*

14
15

Illegal command and function
Basic seek

8*
O
10

16
17
18

Serpentine/pump seek
Basic read
Basic write

11%*

CPU/drive bus data
Seek reliability

1 minute per drive

1 minute per drive
2 minutes per drive

4 minutes per drive
2 minutes per drive
2 minutes per drive
1 minute per drive
45 minutes per drive

12*

13%*

Short data reliability

5 minutes per drive

Read data reliability

2 hours per drive

15%*

Data reliability spin-down/spin-up

15 minutes per drive

Utility Tests

Write data reliability

Disk allocation utility

2 hours per drive
2 minutes per drive

Drive power margins

20 minutes

Update drive revision levels

< 10 seconds

Write protect

10 seconds

Initialize diagnostic test disk

2 minutes

Force diagnostic statistical report

< 10 seconds

* Default tests

2-84

Subsystem Testing

There are three groups of Level 2R DUP tests: Default, Service, and Utility.
Default tests are the tests that are run if no specific test number is given in
the START (or RUN) command. The Default tests are tests 1 to 9 and tests
11, 12. 13, and 15 (see Table 2-5). The Service tests consist of tests 1 through
15 (all the Default tests as well as tests 10 and 14). The Utility tests are tests
16 through 22. These tests are usually run individually and sometimes require
operator intervention. Refer to Table 2-5 for test durations and Paragraph 2.2.6
for test descriptions.

The commands used to run the Level 2R DUP tests are the same ones used to
run any tests under VDS, Refer to Paragraph 2.2.5 for examples.
2.5.6 Error Reporting

If an error report is requested when setting up the tests. the codes given in the

error report define and isolate problems. Reter to Paragraph 2.2.7.

2.6 VMS Error Logs
Whenever the host system detects an RV20 subsystem failure, error codes are

generated by the VMS error logger. The error log report calls out a format
code and an event code. Table 2-6 lists all the format and event codes generated for the RV20 subsystem.

To get a printout of the error log for a failed drive in an RV20 subsystem, use
LOG command and include the device name of the
the ANALYZE/ERROR
drive that failed.
Example:

ANALYZE/ERROR_LOG/INCLUDE=MUAO

Remember that this is merely one example of the ANALYZE command. There
are many qualifiers that can be used with this command. More information can
be obtained by typing HELP at the system prompt. Refer also to the VAX/
VMS Error Log Utility Reference Manual.

Subsystem Testing

2-35

Table 2-6 VMS Error Log Format/Event Codes
Format

Event

Code

006A

Description
Inconsistent internal control structure (drive subsystem

controller microcode bug)

00AA

LESI parity error (LESI adapter to drive subsystem
controller)

00CA

LESI parity error (drive subsystem controller to LESI
adapter)

012A

Drive subsystem controller memory error

0007

Compare modified read or write failure

0069

Nonexistent host memory error

0089

Host memory parity error

00ES8

Unrecoverable read or write error

0108

One-symbol recoverable ECC error

0128

Two-symbol recoverable ECC error

0148

Three-symbol recoverable ECC error

0168

Four-symbol recoverable ECC error

0188

Five-symbol recoverable ECC error

01A8

Six-symbol recoverable ECC error

01C8

Seven-symbol recoverable ECC error

01ES8

Eight-symbol recoverable ECC error

0208

Nine-symbol recoverable ECC error

0228

Ten-symbol recoverable ECC error

0308

Overwrite attempted

002B

Command timeout

004B

Controller detected transmission error

006B

Positioner error

00AB

Drive clock dropout

O00EB

Drive detected error

010B

Controller detected state parity error

014B

Controller detected protocol error

016B

Drive failed initialization

018B

Drive ignored initialization

0103

Unit off-line — disabled due to invalid characteristic

2-86

Subsystem Testing

2.7 Power-Up Testing the Drive Subsystem Controller
The drive subsystem controller module has a set of power-up tests that run
whenever power is applied to the master drive in an RV20 subsystem. The results of the tests are indicated by seven LEDs located on the module. These
LEDs are numbered DO through D6. Figure 2-1 shows the location of the
LEDs on the drive subsystem controller.
Figure 2-1 Drive Subsystem Controller LEDs

FRONT OF DRIVE

LESI LED D6

“DIAG” LED D5
IS| LED D4

Subsystem Testing

2-37

The seven LEDs are divided into a group of three test LEDs (D4 to D6) and

another group of four communications LEDs (DO to D3). After all the power-up
tests run (or when a failure occurs in one of the tests), the three test LEDs are
updated as described below. Then communication with the drives in the subsystem is attempted and the communication LEDs are updated.
D6 — LESI LED

As with all seven LEDs, on power-up. D6 lights up. The drive subsystem controller checks for the presence of the KLESI adapter. The adapter is assumed

to be present if the CIP (Cable In Place) signal is asserted. If the CIP signal is
not asserted, D6 is extinguished. If CIP is asserted, a handshake test is done.
When the handshake test passes, D6 is extinguished.
It is important to remember the limitations of D6. D6 is extinguished if the

test passes, but it is also extinguished if the CIP signal is not present. The
meaning of this extinguished LED should not be misinterpreted to mean the

test definitely passed. If the LED stays on., however, you can be sure that
the CIP signal is present and the LESI handshake test did indeed fail.
D5 — “DIAG” LED

As with all seven LEDs, on power-up, Db lights up. Upon successful completion
of the Level A microdiagnostics that do not require driving the ISI bus, D5 is
extinguished.
D4 — ISI Bus LED

As with all seven LEDs, on power-up, D4 lights up. After the power-up micro-

diagnostics pass, the remaining microdiagnostics run. These tests drive the
data and control lines on the ISI bus. When these tests pass., D4 is

extinguished.

D0 to D3 — Communications LEDs
The four yellow communication LEDs correspond to the Control Module (CM)
number (0 to 3) that each of the drives in the subsystem has been assigned.
The master RV20 is always CM 0. The first slave in the daisy-chain is always

CM 1, the second slave in the chain is always CM 2 and the third slave is
always CM 3. The CM number for each drive is stamped on top of the Power
indicator/address plug on the RV20 front panel.

2-38

Subsystem Testing

On power-up. all four of these LEDs light up. After successful completion of
the Level A microdiagnostics, communication is attempted with each of the
drives in the subsystem. As communication is established with each drive, the
corresponding LED (D0 to D3) is extinguished. If all four LEDs stay on, it
may be due to a faulty drive, Level A microdiagnostics failure, or a fatal error
encountered by the drive subsystem controller.

2.7.1 Performing the Test
Make sure that the entire subsystem is cabled properly. including the cabling

to the host from J61 on the master drive. Make sure that all the slave drives
are powered up and have passed their internal power up/self-tests. The test is
executed by powering up the master RV20.
WARNING

Don’t forget to extend the cabinet’s stabilizer leg before pulling

the drive from the cabinet

Pull the master RV20 out of the cabinet to expose the top cover,

Remove the rear piece of the top cover on the RV20 master drive.
Locate the drive subsystem controller module in the card cage (top
PCA). Locate the seven LEDs on the outer edge of the PCA (Figure
2-1).

Begin the test by powering up the master drive.

Observe the three test LEDs.

All three test LEDs light up, and then the Level A microdiagnostics run. At

the end of the microdiagnostics, all three test LEDs extinguish. If any of the
three LEDs stays on, this indicates a test failure. (Refer to the descriptions of
each LED above.)

A flashing sequence follows, indicating the results at the end of the Level A
microdiagnostics. If all three LEDs extinguish and no flashing sequence occurs,
it is likely that the drive subsystem controller encountered a fatal error. Refer
to Paragraph 2.7.2 to determine the problem.

If only D5 flashes, this indicates that no CIP signal is present. This could be
because the LESI cable from J61 to the host is not connected. It could also be
because there is no LESI adapter in the host. a bad LESI adapter is in the
host. or the LESI cable is bad.

If only D5 and D6 flash, this indicates that the CIP signal is present. and the
potential for establishing communication with the host exists.

Subsystem Testing

2-89

If all three LEDs flash successively, this indicates that the Level A microdiag-

nostics passed and communication with the host has been established.

Observe the four communications LEDs. The LEDs corresponding to
the CM number of each drive in the subsystem extinguish. If the
Level A microdiagnostics do not pass, this communication is never

established and all four of these LEDs stay on.

2.7.2 Controller Fatal Error Indication
The LEDs are set to a unique state if the drive subsystem controller encounters a fatal error. Possible causes of a fatal error include the following.
°

Power fail interrupt in the controller (the system still has power)

Lost communication with the LESI adapter

U/Q port fatal error
When a fatal error occurs, the seven LEDs are set to the following state.

2-40

3 test LEDs (D4, D5, and D6) — Off

4 communications LEDs — On

Subsystem Testing

Chapter 3
RV20 Drive Off-Line Testing

3.1 General
This chapter describes how to detect, isolate and correct RV20 drive problems.
It explains in detail how to run standalone tests on a single RV20 optical disk
drive. The goal of these tests is to isolate a problem to the Field Replaceable
Unit (FRU).
-

The Structured Analysis Method, or SAM, is used to test RV20 drives and

correct errors. This chapter contains SAM procedures to help you detect and
correct basic power-up problems (Paragraph 3.3). It tells you how to run automatic self-tests (Paragraph 3.4), and how to enter CE mode (Paragraph 3.5).

Paragraph 3.6 gives instructions on how to run CE mode tests from the RV20
maintenance panel. Paragraph 3.7 explains, through the use of tables and ma-

trices, how to correct problems using the SAM error codes generated by the
drive.

3.2 Tests
Table 3-1 lists all the RV20 standalone tests. The tests are listed with the test
numbers corresponding to each of three possible modes.

Standalone tests can be run three ways: in automatic self-test mode, CE mode,

and from the host. Instructions for running automatic self-tests and CE mode
tests are given in this chapter. Instructions for running tests from the host are
given in Chapter 2 of this manual.

In addition to the standalone tests, there is also a set of 23 tests that are run

on every power-up or master reset of the drive. These power-up reset diagnostics verify that the reporting mechanisms in the drive (including the operator

and maintenance panel displays) are working properly. These tests also verity

RV20 Drive Off-Line Testing

3-1

that all the timers are functional and that both the RAM and ROM can be
addressed. Error codes 01—2D are generated due to failure of any of these
tests.

The standalone tests are divided into 6 groups: 2X (20-series tests), 3X (30-

series tests), 4X (40-series tests), 5X (50-series tests), 6X (60-series tests), and
7X (70-series tests).

The 2X, 3X, and 4X tests check the individual units of the RV20 (common
memory, ECC, parity and ISI and SIA interfaces).

The 5X tests verify functionality of the drive control and servo control processors, their immediate support hardware, and their communications paths.

The 6X tests verify the functionality of the hardware required to bring the
drive to its “Ready’’ state. These tests ensure that all the servo loops that
need to be closed are indeed working properly. These tests check the tracking
and focus circuitry, and laser power and spindle motor functions.

The 7X tests b‘ring everything together and perform basic seeks and header
reading.

To perform the full test set, the RV20 must be in CE mode (see cautionary
note at Paragraph 3.5). In addition, the following must be done.
o

In a master RV20, the drive subsystem controller module must be
removed for the 4X test to run (see Paragraph 4.4.2).

Terminators must be installed in the J17 and J62 terminator connectors in the rear of the unit, regardless of the master/slave configuration of the drive.

A disk must be inserted into the drive (in order for 6X and 7X tests
to run).

When a CE mode test fails, a failure code is displayed. The failure code corre-

sponds to a list that gives specific corrective actions (FRUs that need replacing
or procedures that have to be performed). Paragraph 3.7 contains this list. The
corrective actions are listed by highest probability of the cause of failure.
After each corrective action, all the CE mode tests must be run again to see if
the problem was solved. It is very important that all the tests be run again.
The tests build on each other and running one specific test can sometimes
cause false error codes.

3-2

RVZ20 Drive Off-Line Testing

Table 3-1 RV2(0 Tests

Test

Self-

CE Mode Host

Test

Name

Description

—

Runs all tests (See Paragraph 3.6.1)

—

Runs all 2X tests

72-1

SWTCHSUB

2K ROM and 2K RAM addressing

test

72-2

ROMSUBTST = Checksum test for Z80 program

72-3

COMEMSUB

memory

—

—
—

15
16
17
——
—
—
—
—
—
—
—
—

18
19

Destructive RAM test on 64K
COMEM

72-4
72-5

PARITYSUB
RAM2KSUB

COMEM and SIA parity test
2K RAM test

26
27

72-6
72-7

MEM-REF

COMEM refresh test
Unsolicited interrupts test

30
31

—
73-1

—
ECC-TSTDF

ECC-TSTVA
ECC-TSTPF

Runs all 3X tests
Data field ECC test
Vector address field ECC test
Post field ECC test

40
41
42
43
44
45
46
47
48
49
4A

—
74-1
74-2
74-3
74-4
74-5
74-6
74-7
74-8§
74-9
74-A

—
UNITIDSUB
ISIRSTSUB
ISIPARSUB
FUNCTSUB
ATTENSUB
DMARYTSUB
DMAREDSUB
INTERSUB
PAUSESUB
ZROFILSUB

Runs all 4X tests
ISI unit ID test
ISI reset circuitry test
ISI parity test
ISI function word test
ISI attention test
ISI DMA write test
ISI DMA read test
DMA interrupt test
ISI pause test
IST zero fill test

50
51

—
75-1

—
UPNOLO
UPLOECHO

Runs all 56X tests
Z80 dual port RAM test
7Z80/8039 dual port RAM test

32
33

73-2
73-3

52
53

75-2
75-3

1B
1C

54
55

75-4
75-5

LOBUSSUB

8039/8031 8-bit bus communications

test

LOECHOSUB
LOTYMSUB

8039/8031 dual port RAM test
8039/8031 internal timers test

RV20 Drive Off-Line Testing

3-3

Table 3-1 RV20 Tests (Cont)

Self-

CE Mode Host

Test

Name

Description

Test

75-6

DPRWPCHK

Z80 lockout of dual port RAM test

75-7

ROMCHKSUB

8031 ROM checksum test

75-8

SKBYTESUB

Seek error data test

76-9

DCPTYMOUT

8039 watchdog timer test

75-A

SCPTYMOUT

8031 watchdog timer test

75-B

LSYNCINIT

Line sync monitor/60 Hz test

65C

75-C

CKDRDWREG

MDS DRDW register test

75-D

TSTSIAPAR

SIA and ECC bus parity test

—

Runs all 6X tests
Spindle down test

76-1

BRAKESUB

76-2

TIMEUPSUB

Spindle up test

76-3

PWRCTLSUB

Power control loop test

76-4

FOCUSSUB

Focus loop test

76-5

NULFSMSUB

FSM nulling test

76-6

CORTRKSUB

Coarse tracking loop test

76-7

FYNTRKSUB

Fine tracking loop test

76-8

INTRPTSUB

Lower deck interrupt signal test

—

76-9

76-A

RHIT-SUB

Reading header signal test

76-B

QUADSUB

Quadsum test

76-C

CARLOCSUB

Carriage lock test

76-D

GARBNDSUB

Guard band sensor test

76-E

LGWRAPSUB

MDS long wrap test

—

Runs all 7X tests

Interrupt speed test

77-1

JPBACKSUB

Jumpback test

77-2

NOJPBKSUB

No jumpback seek test

77-3

OCILSKSUB

Oscillating seek test

77-4

SEC-TEST

Sector interrupt test

77-56

LOWPARSUB

SDC/MDS parity test

77-6

SHWRAPSUB

MDS short wrap test

—

Load/modify EEPROM data

—

Read EEPROM data

—

Initialize EEPROM

3-4

RV20 Drive Off-Line Testing

3.3 Power-Up Procedure (SAM 1000)
ASSUMPTION: The proper ac power cable has been installed, connecting the
RV20 subsystem to a live site power outlet. The Start/Stop switch on the operator panel is in the STOP position. A data cartridge is not installed.
y

Set CB1 on the rear panel to the ON (1) position. Does CB1
trip?

Do the cooling fans for both the power supply and card
rack begin to operate?

Does the Power indicator on the front panel
illuminate?

Does the operator panel hexadecimal display

cycle through all codes (00, 11, 22, . . . FF),
and then go blank?
n

Does the maintenance panel hexadecimal
display indicate 00 with all indicators except CE mode extinguished?

Perform SAM procedure 1001.

Perform SAM procedure 1002.
1

Perform SAM procedure 1003.
1

Perform SAM procedure 1004.
1

Perform SAM procedure 1005.

The RV20 has now been successfully po-

wered up and is ready for host communication, automatic self-test (Paragraph 3.4)
or CE Mode operation (Paragraph 3.5).

RV20 Drive Off-Line Testing

3-6

3.3.1 AC Power Problem Isolation (SAM 1001)
ASSUMPTION: Conditions assumed for SAM procedure 1000 are true. CB1
trips on power-up.

Set CB1 to the OFF (0) position. Remove connector P15 from

the power supply. Reset CB1 to the ON (1) position. Does CB1
trip?

Set CB1 to the OFF (0) position. Reinstall P15 at power

supply. Remove power connector from the card rack cool~

ing fan. Reset CB1 to the ON (1) position. Does CB1
trip?

Set CB1 to the OFF (0) position. Remove P16 at the

power supply. Reset CB1 to the ON (1) position.
Does CB1 trip?

Set CB1 to the OFF (0) position. Check the power
wiring to the card rack cooling fan for short circuits

between conductors or from conductors to chassis
ground. Repair/replace as necessary. Reinstall all

connectors and perform SAM procedure 1000.
1

Set CB1 to the OFF (0) position. Reinstall P16 at
the power supply and the power connector on the
card rack cooling fan. Replace the S/DC PCA and
perform SAM procedure 1000.

Set CB1 to the OFF (0) position. Check power wiring from P15 to the baseplate (refer to Figure 5 in

the Removal and Replacement section) for short circuits between conductors or to the chassis ground.

Repair/replace as necessary. Reinstall all connectors
and perform SAM procedure 1000.
1

Set CB1 to the OFF (0) position. Replace the card
rack cooling fan. Reinstall all connectors and perform SAM procedure 1000.

Set CB1 to the OFF (0) position. Replace the power
supply, ensuring that the new power supply is set
for the correct site power. Reinstall all connectors
and perform SAM procedure 1000.

RV20 Drive Off-Line Testing

3.3.2 AC Power Distribution Problem Isolation (SAM 1002)
ASSUMPTION: Conditions assumed for SAM procedure 1000 are true. Cooling

fans for the power supply and/or card rack do not operate when the RV20 is
powered up.

Are both cooling fans inoperative?

:|3

5|r n Is the power supply fan inoperative?
lr Is the card rack fan inoperative?

Set CB1 to the OFF (0) position. Replace the power sup-

ply, making sure that the new power supply is set for the

correct site power. Perform SAM procedure 1000.

Set CB1 to the OFF (0) position. Check and repair/replace
the power connection to the card rack cooling fan,
Perform SAM procedure 1000.

2
|

Set CB1 to the OFF (0) position. Replace the card rack

cooling fan. Perform SAM procedure 1000.

RV20 Drive Off-Line Testing

3-7

3.3.3 DC Power Problem Isolation (SAM 1003)
ASSUMPTION: Conditions assumed for SAM procedure 1000 are true. DC

power does not come up when RV20 is powered up.
n

Set CB1 to the OFF (0) position. Remove P16 at the power

supply. Reset CB1 to the ON (1) position. Does the power indicator on the operator panel illuminate?
y

Set CB1 to the OFF (0) position. Reinstall P16 at the

power supply. Remove the carriage board from the card
rack backplane (Figure 4-8). Set CB1 to the ON (1) posi-

tion. Does the power indicator on the operator panel

1lluminate?

n
|

Set CB1 to the OFF (0) position. Reinstall the carriage board at the card rack backplane. Remove the

R/WC PCA from the card rack. Set CB1 to the ON
(1) position. Do the Power indicators on the operator
panel illuminate?

Set CB1 to the OFF (0) position. Reinstall the
R/WC PCA in the card rack. Remove the ESG
PCA from the card rack. Set CB1 to the ON

(1) position. Do the Power indicators on the operator panel illuminate?
y

Set CB1 to the OFF (0) position.
Reinstall the ESG PCA in the card rack.
Remove the S/DC PCA from the card
rack. Set CB1 to the ON (1) position. Do

the Power indicators on the operator

panel illuminate?
Set CB1 to the OFF (0) position. Remove
P14 at the power supply. Using an ohmmeter set to the lowest range, insert the

common lead into P14 at 4, 5, or 6. The
resistance reading to P14 at 1 and 2

should be > 0.3 O; to P14 at 3, 7, and 9
should be > 6 O. If readings are abnormal, use standard troubleshooting meth-

ods to locate the cause of the problem

ONONONONONGO,
3-8

RV20 Drive Off-Line Testing

and repair/replace the failing component.
Perform SAM procedure 1000.

Set CB1 to the OFF (0) position.
Disconnect the ac power cable. Remove
and replace the power supply. Perform

SAM procedure 1000.

Set CB1 to thé OFF (0) position. Remove
and replace the carriage. Perform SAM
procedure 1000.

Set CB1 to the OFF (0) position. Replace
the RIWC PCA. Perform SAM procedure
1000.

Set CB1 to the OFF (0) position. The
ESG PCA contains the overtemperature

sensing circuitry. If the temperature at

the card rack exceeds 700C + 30C, this
circuitry shuts off dc power. If overtem-

perature appears to be causing loss of dc
power, correct the condition and perform
SAM procedure 1000.

Set CB1 to the OFF (0) position. Replace
the ESG PCA. Perform SAM procedure
1000.

Set CB1 to the OFF (0) position. Replace
the S/DC PCA. Perform SAM procedure
1000.

Set CB1 to the OFF (0) position.
Remove P16 at the power supply and
P10 at the card rack. Check for and re-

pair any damage to mating connections.
Replace the ribbon cables. Perform SAM
procedure 1000.

RV20 Drive Off-Line Testing

3-9

3.3.4 Operator Panel Initialization Problem Isolation
(SAM 1004)
ASSUMPTION: Conditions assumed for SAM procedure 1000 are true.
Operator panel hexadecimal display does not cycle through correct power-up
sequence.

Does the operator hexadecimal panel display cycle through
codes 00, 11, 22, . .. FF only once?

Does the operator panel hexadecimal display show a code

of 01 through 2D?
y

Does the operator panel hexadecimal display show a
code of 007

I
1

cycle through a sequence of codes?
1

I
2

Set CB1 to the OFF (0) position. Replace the

ISI PCA. Perform SAM procedure 1000.

I
3

Does the operator panel hexadecimal display

Set CB1 to the OFF (0) position. Replace the

operator panel. Perform SAM procedure 1000.

Set CB1 to the OFF (0) position. Replace the
ribbon cable from the operator panel (J30) to
the card rack backplane (J38). Perform SAM
procedure 1000.

This is a Go/No-Go failure code. Refer to the

appropriate SAM failure code table for corrective action. Perform SAM procedure 1000.

Set CB1 to the OFF (0) position. Replace the

S/DC PCA. Perform SAM procedure 1000.

Ensure that the Start/Stop switch is in the
STOP (released) position.

3-10

RVZ20 Drive Off-Line Testing

3.3.5 Maintenance Panel Initialization Problem Isolation
(SAM 1005)
ASSUMPTION: Conditions assumed for SAM procedure 1000 are true. The
maintenance panel hexadecimal display does not show a code of 00 with all

Is the maintenance panel hexadecimal display blank?

———
o
QU o

e BN

Does the maintenance panel hexadecimal display show a
|

code other than 007
N ——
<

indicators except CE mode extinguished after power-up sequence.

Are any or all of the maintenance panel indicators,
except CE Mode, illuminated?

Set CB1 to the OFF (0) position. Replace the ICI
controller PCA. Perform SAM procedure 1000.
Set CB1 to the OFF (0) position. Replace the maintenance panel. Perform SAM procedure 1000.
Set CB1 to the OFF (0) position. Replace the ribbon

cable from the maintenance panel (J40) to the card
rack backplane (J39). Perform SAM procedure 1000.
Make sure the Start/Stop switch on the operator

panel is in the STOP (released) position.
Set CB1 to the OFF (0) position. Replace the S/DC
PCA. Perform SAM procedure 1000.

Set CB1 to the OFF (0) position. Replace the ECC
PCA. Perform SAM procedure 1000.

This implies normal conditions. The maintenance

panel hexadecimal display shows a code of 00 and all
indicators, except CE mode, are extinguished.
Perform SAM procedure 1000.

RV20 Drive Off-Line Testing

3-11

3.4 Entering Automatic Self-Test Mode
(SAM 1006)
ASSUMPTION: The RV20 power-up or reset sequence has completed normally:

operator panel Power indicators are illuminated, the operator panel hexadecimal
display is blank, the maintenance panel hexadecimal display shows a code of
00, and all maintenance panel key indicators are extinguished.
n

Insert a data cartridge and press the operator panel Start/Stop

switch to the START position. Does the maintenance panel
hexadecimal display begin to display test numbers (11, 12, 13,

etc.)?
y

Does the operator panel continuously flash a sequence of

three 2-character codes followed by a blank?
n

Do the maintenance and operator panel hexadecimal
displays blank, and does the Ready indicator. (in the
operator panel Start/Stop switch) illuminate after 3

==
Ul
B — QO — D) — =

to 4 minutes?
1

Replace the ISI PCA.

Replace the S/DC PCA.

Replace the R/'WC PCA.

Replace the MDS PCA.
Replace the operator panel.
Replace the maintenance panel.

Replace the ribbon cable from the operator panel
(J30) to the card rack backplane (J38).

Replace the ribbon cable that leads from the maintenance panel (J40) to the card rack backplane (J39).

This is a self-test failure. The three codes are: (1)

test number, (2) failure code, and (3) subfailure code.
Refer to the appropriate SAM failure code table for
corrective action.
1

This indicates normal completion of automatic self-

tests. The RV20 is spun up and ready for host
communication.

3-12

RV20 Drive Off-Line Testing

3.5 Entering CE Mode (SAM 1007)
ASSUMPTION: The RV20 power-up sequence has completed normally: the op-

erator panel Power indicators are illuminated, the operator panel Start/Stop
switch is in the STOP (released) position, the unit is spun down, and the operator panel Start/Stop indicator is extinguished.
n

Press and release the CE mode key on the maintenance panel.
Does the CE mode indicator illuminate?
y

Do all maintenance panel key indicators illuminate, while
the maintenance panel hexadecimal display steps through

codes 00, 11, 22, . . . FF? Then, do the display and all the
indicators except CE mode extinguish?
y

Does the operator panel hexadecimal display cycle
through codes 00, 11, 22, . . . FF, and then display
00?
y

‘Does the maintenance panel hexadecimal display show a code of 147

Make sure the Start/Stop switch on the opera-

tor panel is in the STOP (released) position,
the unit is spun down, and the operator panel

Start/Stop indicator is extinguished.
DN —

Replace the maintenance panel.
Replace the S/DC PCA.

— OV

e GO =

Replace the ISI PCA.

Replace the operator panel.

- Replace the ribbon cable that leads from the
maintenance panel (J40) to the card rack backplane (J39).

-3

Replace the ribbon cable from the operator

panel (J30) to the card rack backplane (J38).

)

- Replace the MDS PCA.
Replace the R/WC PCA.

At this point, entry into CE mode is complete.
The RV20 is in Idle mode and under control of

the maintenance panel. Proceed to Paragraph
3.6.

RV20 Drive Off-Line Testing

3-13

3.6 Diagnostic Test Procedure
1.

Perform SAM procedure 1000, as described in Paragraph 3.3.

To place the RV20 in the CE mode, perform SAM procedure 1007, as de-

scribedin Paragraph 3.5.
At this point, the RV20is in Idle mode andis under the control of the
maintenance panel.

NOTE

To ensure that the host does not access the external interface
bus during 4X CE test operation, disconnect the external interface cable to the host prior to performing CE mode tests. In a
master RV20, the drive subsystem controller must be removed

in order to run 4X tests.

NOTE

To run 6X and 7X tests, a data cartridge must be installed in
the RV20 and the Start/Stop switch on the operator panel must

be pressed to the START position.

To run the indicated test, proceed to 'step 3.

To select or chahge a test or option, refer to Paragraph 3.6.1.
To change input parameters, refer to Paragraph 3.6.2.
To change a testing option, refer to Paragraph 3.6.3.
To perform the test to read/modify data in the EEPROM, proceed to
Paragraph 3.6.4.

To run the test indicated, press the maintenance panel START/STOP key.
The Start/Stop indicator flashes and the maintenance panel shows the current test number.

If an illegal test number is selected, the maintenance panel flashes and FF
is displayed on the operator panel.
If failures occur, the operator panel displays the failure codes. Successful

completion is indicated by 00 on the operator panel.

3-14

RV20 Drive Off-Line Testing

To temporarily halt a testing session, press and hold the START/STOP
key. When the test that is currently running concludes, the testing session
halts. The Start/Stop indicator extinguishes, and the operation is then in
Stopped mode.

To resume testing after a test session has been halted, press the START/
STOP key again. The Start/Stop indicator flashes and the testing session
resumes where it was halted.

3.6.1 Changing a Test or Option

Make sure you have performed steps 1 and 2 from Paragraph; 3.6 before‘beginning the procedures in this section.
1.

To select or change a test or an option, use the INCR MSD and INCR
LSD keys to enter the number of the desired test in the hexadecimal display. Refer to Table 3-1 for a list of the available tests.
Test selection is accomplished by setting the MSD to the desired test
group, and setting the LSD to the desired test number. To run test 25, set

2 as the MSD and 5 as the LSD. If you want to run an entire set (2X, 3X,
4X), set 0 as the LSD. For example, if you set 20, then all 2X tests will
run. If you set 30, then all 3X tests will run. Test select codes of 1X are
options that run all the CE mode tests sequentially. The 1X options are as
follows.
Code

10/11

|
Option

Run all tests (excluding CE mode tests A1 and A2). Stop on
first failure or on completion of one pass.

Run all tests (excluding CE mode tests Al and A2) using current voltage margin parameter. Run until first failure.

Run all tests (excluding CE mode tests Al and A2). Increment
voltage margin parameter. Run until first failure.

Same as 10/11, except do not stop on one-time failures.

Same as 12, except do not stop on one-time failures.

Same as 13, except do not stop on one-time failures.

RV20 Drive Off-Line Testing

3-16

To enter the test selected, press the ENTER key. The hexadecimal display
goes blank while the ENTER key is pressed. When the key is released, the
new test number is displayed.
To run the test selected, press the START/STOP key. The Start/Stop indi-

cator flashes and the maintenance panel shows the current test number.
If an illegal test number is selected, the maintenance panel flashes and FF

is displayed on the operator panel.

If failures occur, the operator panel displays the failure codes. Successful

completion is indicated by 00 on the operator panel.

3.6.2 Changing Input Parameters
Make sure you have performed steps 1 and 2 from Paragraph 3.6 before beginning the procedures in this section.
To change input parameters, proceed as follows.

Press the DISP MEM key until the Disp Mem indicator lights up, and a
memory display option code is displayed.

Use the INCR MSD and INCR LSD keys to set the maintenance panel
hexadecimal display to the desired code. Memory display option codes are

as follows.

Code

Option

Lower half of common memory/2K RAM

Lower half of common memory/2K hidden ROM

Upper half of common memory/2K RAM

Upper half of common memory/2K hidden ROM

ECC parameters

Voltage margin parameters

CE test parameters

Press the ENTER key. The next two maintenance panel displays show the
upper and lower bytes of the selected memory address.
For memory display options 00, 01, 02, and 03:
a.

Use the INCR MSD and INCR LSD keys to set the display to the

upper byte of the address.

3-16

Press ENTER.

RV20 Drive Off-Line Testing

Use the INCR MSD and INCR LSD keys to set the display to the
lower byte of the address.

Press ENTER.

For memory display options 04, 05, and 06, enter the default memory ad-

dress by pressing ENTER twice.

The maintenance panel displays the contents of the selected memory ad-

dress. The operator panel displays the lower byte of the selected memory
address.

To display the upper byte of the selected memory address on the operator
panel, press the F1 key.

To step the maintenance and operator panel displays to the next memory
location in sequence, press ENTER. Each time ENTER is pressed, the displays step to the next location.

To change the ECC, voltage margin, or CE testing options:

Use the INCR MSD and INCR LSD keys to set the display to the
new value.
ECC:

first = sector buffer number (1 through 44)

second = number of bytes/code word to be altered

Voltage Margin:

first = voltage margin control (refer to the RV20 Technical Manual
(EK-ORV20-TM).

CE Testing Options:
first = test repetition count
second = pass count
third = fail count

fourth = run option

Refer to Paragraph 3.6.3 for specific information about testing options.

After setting the display to each new value, press ENTER.

RV20 Drive Off-Line Testing

3-17

After displaying or altering the selected memory address, press the DISP
MEM key until the Disp Mem indicator extinguishes.

Refer to Paragraph 3.6, step 3, for information about running tests.

3.6.3 Selecting a Testing Option
1.

To select a testing option while in Idle mode, use the INCR MSD and
INCR LSD keys to enter the number of the desired option in the hexa-

decimal display. (Refer to Paragraph 3.6.1 for more specific instructions on
modifying the testing options.)
The following is a list of available testing options.

Code
00

Option

Loop Until FC = 1 or PC = TRC. The test is éxecuted repeatedly until fail count (FC) equals 1 or pass count (PC) equals test
repetition count (TRC).

Loop Until FC = TRC or PC = 1. The test is executed until

the FC equals the TRC, or the PC equals 1.
02

Loop Until FC = TRC or PC = 255 Decimal. The test is ex-

ecuted repeatedly until the FC equals the TRC or the PC equals
255.

Loop Until PC = TRC or FC = 255 Decimal. The test is executed repeatedly until the PC equals the TRC or the FC equals
255,

Loop Forever Until FC = 1. Test executioh stops on detection
of the first failure. As long as no failures are detected, the test
is executed endlessly.

Loop Forever and Ignore Errors. The test is executed endlessly,

regardless of failures detected.

To enter the test option, press the ENTER key, then the START/STOP
key. If an invalid option number is selected, the maintenance panel hexa-

decimal display flashes FF.
Once an option is entered, all tests executed use that option until it is

changed.
Refer to Paragraph 3.6, step 3, for information about running tests.

3-18

RV20 Drive Off-Line Testing

3.6.4 Performing the Test to Read/Modify Data in the EEPROM
There are two tests on the EEPROM: Al and A2. These tests have to be run
from the maintenance panel and are not run under the Run All Tests options
listed in Paragraph 3.6.1. Test Al allows you to access the EEPROM and read
and/or modify data. Test A2 is a test that tries to restore some basic numbers
in the EEPROM in the event that the EEPROM is completely inaccessible.

To start the test, proceed as follows. (These instructions assume that you are
in CE mode from Paragraph 3.6, steps 1 and 2.)

Enter a test number (Al or A2) on the maintenance panel hexadecimal
display with the INCR LSD and INCR MSD keys. Press ENTER.

For test Al, start the test by pressing the maintenance panel START/
STOP key. If a 9D, 9E, or 9F appears on the operator panel, this indicates
that a problem exists with the EEPROM. You will not be able to access

the EEPROM until the problem is corrected or test A2 is run. Try to run

test A2 by entering A2 on the maintenance panel hexadecimal display (see
1., above). If error codes still appear, follow the corrective procedures in
Paragraph 3.7 for the specific error code displayed.

If a 00 appears on the maintenance panel hexadecimal display, you will
access the default address in the EEPROM if you press the ENTER key

on the maintenance panel. Go to step 6 to exit the test.

1If 00 is the first address of the EEPROM that is to be read/modified,
press the ENTER key. If 00 is not the desired address, then enter the
desired address with the INCR LSD and INCR MSD keys. When the desired address appears on the maintenance panel, press the ENTER key.

The address you select appears on the operator panel display and the contents of that location appears in the maintenance panel display.

RV20 Drive Off-Line Testing

3-19

To change the contents of the memory address, use the INCR LSD and
INCR MSD keys to enter the new contents value. When the new contents
value appears in the maintenance panel display, press ENTER. The new
value is then stored in local RAM.
If no change to the contents of the memory address is desired, press the
ENTER key. When the ENTER key is pressed, the next successive ad-

dress appears on the operator panel display and the contents of that address appears in the maintenance panel display.
Only addresses 00H through 23H are accessible. The assigned addresses

follow.

Address

Contents

TMCSP unit number (in hex)

Hardware revision (8-bit binary)

03—05

Model code (8-bit binary)

N1, NO (BCD) of 8-digit serial number

N3, N2 (BCD) of 8-digit serial number

N5, N4 (BCD) of 8-digit serial number

N7, N6 (BCD) of 8-digit serial number

LSD of 2-digit (alpha) site code (ASCII)

MSD of 2-digit (alpha) site code (ASCII)

OE—1F

Unused

LSB of operating parameter mode

MSB of operating parameter mode

LSB of attention delay parameter

MSB of attention delay parameter

If you try to access an address out of the 00 to 23 range (or if you try to
input an illegal value in 20H to 23H), then the maintenance panel display
flashes a value three times.

To exit the test (and store the new data), press the START/STOP key or
the CE MODE key on the maintenance panel. This writes the new data
that was entered/modified into the EEPROM.
To quit the test without saving the changes, press the MASTER RESET

key on the maintenance panel.

3-20

RV20 Drive Off-Line Testing

3.7 Failure Analysis
The SAM failure and subfailure codes provide a structured system of corrective
actions to resolve functional problems within the RV20.

There are 135 SAM failure codes that can be generated by the drive. Each
code is listed in a chart with the corrective action (in specific order) that should
be taken. Table 3-2 contains a brief description of all the error codes. The table
also lists the tests that can cause each of the failure codes. Additionally, the

table lists the tables or paragraphs in this chapter that describe the action to
be performed to correct the problem. Most of these corrective actions are removal and replacement of FRUs.

After doing any corrective action called out in this section, you must run all

the CE mode tests (except the Al and A2 tests) again to see if that procedure
solved the problem. If not, go on to the next procedure. After each corrective
action, replace the original part and run all the CE mode tests again.
CAUTION

It is very important that you run ALL the CE mode tests after
doing a corrective procedure. The RV20 CE mode tests ali build
on each other and running a test at random can generate erroneous error codes.

Of the 135 codes, 116 are simple procedures. These codes are given in Table
3-3. When these failure codes appear, there are no subfailure codes or additional steps to perform before FRU removal and replacement begins. The left
column of the table contains the corrective actions and the paragraph reference
in this book. The failure code is located on the top row. The column under the

failure code gives the order of corrective actions to be performed.

The remaining 19 codes are described in the following separate paragraphs.
These sections give details on actions to take to correct the problem. These 19
codes require additional steps before simple corrective actions can be taken.

Most of these involve specific subfailure codes that further isolate the problem

in order to get to a simple corrective procedure. Some of the 19 codes have
tables of subfailure codes similar to Table 3-3. The 19 codes are as follows.

07, 0B, 0C, 42, 43, 4F, 79, 7A, 7B, 7E, 80, 81, 90, 9D, C0, C1, C2, C3, C4

RV20 Drive Off-Line Testing

3-21

Table 3-2 Failure/Subfailure Codes
Fail.

Mnemonic (or

Maint.

Code Subfail. Code)

Reference

SETROMTST

Table 3-3

- CE Mode Tests
That Failed

Description

Power-up/reset

Failure of firmware

diagnostics -

controlled switch to
select 2K hidden ROM.

CHKSUMTST Table 3-3

SETRAMTST

Table 3-3

'CHKRAMTST Table 3-3

Power-up/reset

Incorrect checksum in the

diagnostics

internal controller ROM.

Power-up/reset

Failure to select internal

diagnostics

controller 2K ROM.

Power-up/reset

“Stuck” bits in the

diagnostics

internal controller RAM or
incorrect addressing to the
RAM.

LWHRDCORE Table 3-3

Power-up/reset

Dual port RAM error

diagnostics

when the drive went
through internal controller

initialization.

LWHRDCORE Table 3-3

Power-up/reset

Device fault present in

diagnostics

the drive when the
internal controller

went through
initialization checks.

LWHRDCORE Paragraph

3.7.1

Power-up/reset

Failure in the basic

diagnostics

communications test

between the internal
controller and the

drive.
08

LWHRDCORE Table 3-3

Power-up/reset

MDS PCA failed to

diagnostics

generate simulated

sector interrupt

pulses during power-up
initialization.

3-22

RV20 Drive Off-Line Testing

Table 3-2 Failure/Subfailure Codes (Cont)
Fail.

Mnemonic (or

Code Subfail. Code)
09

Maint.

CE Mode Tests

Reference

That Failed

LWHRDCORE Table 3-3

Description

Power-up/reset

Servo control

diagnostics

microprocessor (8031)
ROM integrity test
failed during power-up
initialization.

O0A

Table 3-3

POLTYMTST

Power-up/reset

Failure of the counter

diagnostics

timer circuit on the ICI
PCA.

CHKTYMTST Paragraph
3.7.1

Power-up/reset

Failure of the counter

diagnostics

timer circuit on the ICI
PCA.

Drive took more than six

Paragraph

seconds to communicate

3.7.1

with the internal
controller after
initialization.
0D

Table 3-3

Table. 3-3

Table 3-3

Power-up/reset

Bad controller parity at

diagnostics

power-up/reset.

Power-up/reset

Failure of the Z80 to

diagnostics

properly address COMEM.

Power-up/reset

Failure of the ECC PCA to

diagnostics

identify itself.

Power-up/reset

ECC PCA generating

diagnostics

unsolicited interrupts.

Power-up/reset

Z80 unable to write to a

diagnostics

single address in 2K RAM.

Power-up/reset

S/DC PCA generating

diagnostics

unsolicited interrupts.

Power-up/reset

Z80 encountered program

diagnostics

logic that erroneously
invoked a restart 38

command.

RV20 Drive Off-Line Testing

3-23

Table 3-2 Failure/Subfailure Codes (Cont)
Fail.

Maint.

CE Mode Tests

Code Subfail. Code)

Reference

That Failed

Description

Table 3-3

Mnemonic (or

Table 3-3

|
20

Table 3-3

Power-up/reset

Failure of high/low

diagnostics

COMEM select logic.

Power-up/reset

Z80 unable to write to a

diagnostics

single address in COMEM.

Power-up/reset

diagnostics
Power-up/reset

diagnostics
21

Table 3-3

Power-up/reset

= Bad ECC or SIA bus

parity.
= Read laser fault present

at power-up/reset.
= Write laser fault present

diagnostics

at power-up/reset.

Power-up/reset

Quad sum fault present

diagnostics

at power-up/reset,.

Power-up/reset

Verify header fault

diagnostics

present at power-up/
reset.

Table 3-3

Power-up/reset

Seek fault present at

diagnostics

power-up/reset.

Power-up/reset

Data sync fault present

diagnostics

at power-up/reset.

Power-up/reset

diagnostics
27

Table 3-3

Power-up/reset

diagnostics
28

3-24

Table 3-3

RV20 Drive Off-Line Testing

=~ Wobble fault present at

power-up/reset,
=~ PLL fault present at

power-up/reset.

Power-up/reset

Focus fault present at

diagnostics

power-up/reset.

Power-up/reset

Line sync fault present at

diagnostics

power-up/reset.

Power-up/reset

Motor speed fault present

diagnostics

at power-up/reset.

Table 3-2 Failure/Subfailure Codes (Cont)

Fail. Mnemonic (or
Code Subfail. Code)

Maint.
Reference

Table 3-3

CE Mode Tests
That Failed

Description

Power-up/reset

MPU timeout fault

diagnostics

present at power-up/
reset.

Table 3-3

Power-up/reset
diagnostics

TSTSETROM

reset.

Table 3-3

Power-up/reset = Tracking fault in the
drive.
diagnostics

Table3-3

21,22

= MPU self-test fault
present at power-up/

Failure of the ROM/RAM

switch logic to select
program ROM.

TSTSETRAM

Table3-3

Failure of the ROM/RAM

switch logic to select
program RAM.

TSTSETCOM

Table3-3

Failure of the high/low

common memory page

select logic.

SEC-TEST

Table 3-3
‘

S/DC PCA not interrupting

the ISI or interrupts are
irregular.

READTST

- Table 3-3

TSTCHKSUM Table 3-3

DMA read logic failure.

48, 49

Failure to read correct

program ROM data.

Table 3-3

CHKZROFIL

BINARYCNT Table3-3

FILLZERO

Table 3-3

DMA zero fill logic not

functioning properly.

23,31—33,
47—49

Failure to verify memory
test pattern.

Failure to fill memory
with Os.

WALKONE

Table 3-3

“Stuck’’ bits in memory.

RV20 Drive Off-Line Testing

3-25

Table 3-2 Failure/Subfailure Codes (Cont)
Fail.

Maint.

CE Mode Tests

Code Subfail. Code)

Mnemonic (or

Reference

That Failed

Table 3-3

FILLONE

Description

Failure to fill memory
with 1s.

WALKZERO

Table3-3

“Stuck” bits in memory.

ONEZERO

Table 3-3

Failure to write byte
“stripes’’ in opposite

areas of memory.

CHECKER

Table3-3

Failure to write a pattern
to memory in which no two

adjacent cells are the
same.

S3E

CHECKALT

Table3-3

Failure to verify a
previously written

alternating pattern in
memory.

BINARYCHK

Table3-3
‘

23,31—33,

Failure to validate data

and address range of
memory.

PARITYCNT

Table3-3

Failure of parity check on

write to common memory.

PARITYCHK

Table3-3

Failure of parity check on

read from common
~

Subfailure

Paragraph

code 01

3.7.2

memory.

Failure of the MDS PCA
to long wrap data from
COMEM.

Subfailure

Paragraph

code 02

3.7.2

—

Communication breakdown
between internal controller

and drive during long
wrap test.

3-26

RV20 Drive Off-Line Testing

Table 3-2 Failure/Subfailure Codes (Cont)

Fail. Mnemonic (or

Code Subfail. Code)

Subfailure
code 03

Maint.

Reference

CE Mode Tests

That Failed

Paragraph 75
3.7.2

Description

MDS PCA not generating
two BOS pulses within 10
milliseconds with the PLL
Reset switch closed.

Subfailure
code 01

Paragraph 76
3.7.3

Failure of interleave
table logic on MDS PCA.

Subfailure
code 02

Paragraph —
3.7.3

Communication breakdown
between internal controller
and drive during short
wrap test.

Subfailure
code 03

Paragraph 76
3.7.3

No sector interrupts
occurring.

Subfailure
codes 20—2D

Paragraph —
3.7.3

Refer to Code 7A,
subfailure codes 20—2D.

ZRO COMEM Table 3-3

Bit is stuck to 1 or
0 in a CE selected
or default data field
buffer in common
memory.

PARBYTS2F

Table 3-3

Bit is stuck to 1 or
0 in a CE selected

or default ECC buffer
in common memory.

DF
CHECK

Table3-3

WRTLSROFF Table3-3

ECC PCA returned a good

data status, but did not
actually correct the data.

Drive electronics failed to

software write protect the

drive.

COMEMSUB

Table 3-3

Internal controller failed

to pass the common

memory subtest due to
parity.

RV20 Drive Off-Line Testing

3-27

Table 3-2 Failure/Subfailure Codes (Cont)
Fail.

Mnemonic (or

Maint.

CE Mode Tests

Code Subfail. Code)

Reference

That Failed

Table3-3

COMEMSUB

Description
Internal controller failed
to pass the common
memory subtest due to

parity.
4C

COMEMSUB

Table3-3

Improper addressing of
COMEM by the Z80.

COMEMSUB

Table 3-3

Memory refresh function
not refreshing COMEM.

4FE

TSTSIAPAR

Table3-3

Parity on the SIA bus or
no forced parity

being reported.
4F

UNSOL IN

Paragraph

3.7.4

TSTUIDBUS

Table 3-3

Unsolicited interrupts in

the drive.

“Stuck’ bits in the ISI
bus or a failure of the

device address switch
register to produce

valid numbers.
51

TSTBADID

Table 3-3

Drive responding to the
incorrect unit ID.

TSTGOODID

Table 3-3

41, 44

Failure to respond to the
proper unit ID.

TSTBSRID

Table 3-3

41, 45

Failure of the bit

significant response after
successful unit selection.
54

TSTBUSIDFL Table 3-3

ISI bus not idle when it

should be.
566

~ TSTUNITID

Table 3-3

41, 44—49

Failure of the ICI
interface logic response
to unit select.

3-28

RV20 Drive Off-Line Testing

Table 3-2 Failure/Subfailure Codes (Cont)

Maint.

Code Subfail. Code)

Reference

CE Mode Tests
That Failed

Description

TSTICIPLO

Table 3-3

Unit selection when an ISI

Fail. Mnemonic (or

bus parity error is present
on bits 0—7.

TSTICIPHI

Table 3-3

Unit selection when an ISI

bus parity error is present
on bits 8—15.

SETFUNWRD Table 3-3

44, 46—49

Failure of the function
word request logic to be
set after receipt of a
function word.

SETDMARYT Table 3-3

Failure to properly set up
for a DMA write
operation.

TSTDMARYT Table3-3

TSTICIRST

Table 3-3

TSTWRDCTR Table 3-3

46, 47

SETDMARED Table 3-3

47—49

TSTDMARED Table 3-3

47—49

Failure of DMA write.

Failure of the ICI reset
circuitry.

Failure of the DMA word
counter logic.

Failure to set up properly
for a DMA read operation.

Data transfer failure from

common memory to the
ISI bus during a DMA

read.

TSTUPUID

Table 3-3

SETPAUTST

Table3-3

Failure of the ISI unit
select circuitry.

Failure to acknowledge
function word or failure to
enable pause.

RV20 Drive Off-Line Testing

3-29

Table 3-2 Failure/Subfailure Codes (Cont)
Fail.

Mnemonic (or

Maint.

CE Mode Tests

Code Subfail. Code)

Reference

That Failed

Table3-3

TSTPAUSET

Description
Failure to set pause
on the last DMA of a
previously verified block

of data.

TSTPAUSET

Table3-3

Failure of the ISI logic to
clear pause.

SETFUNACK

Table 3-3

Erroneous readback of a
previously written function

word.
64

TSTFUNWRD Table 3-3

Erroneous readback of a
previously written function

word.
65

TSTFUNREQ

Table 3-3

Failure of a function word
write to set a function

word request.

TSTWRCLR

Table3-3

|
67

SETATTN

Table 3-3

Failure to clear function
word request.

Failure to set
ATTENTION.

CLEARATTN

Table3-3

Failure to clear
ATTENTION.

TSTATTNID

Table 3-3

Failure to set proper
ATTENTION bit.

SETDMAZRO Table 3-3

ICI fails to properly set
up for a DMA write
operation.

TSTZROFIL

Table 3-3

ICI fails to properly set
up for a DMA write
operation.

TEST-0061

Table 3-3

Failure of ICI reset

circuitry.

3-30

RV20 Drive Off-Line Testing

Table 3-2 Failure/Subfailure Codes (Cont)
Fail. Mnemonic (or

Code Subfail. Code)

Maint.

Reference

FILLCOMEM Table3-3

CE Mode Tests

That Failed

Description

MPU is unable to write

pattern to common
memory.

Failure to put the drive

TSTLODECK Table3-3

51—5F,61—6D
71—717

into diagnostic mode.

CMDLODECK Table 3-3

51—5E, 61—6D

Failure to accept a

7177

diagnostic command.

CLRFLGREG Table3-3

Failure to clear the dual

TSTFLGREG Table 3-3

51, 52

TSTPADDRS Table3-3

51, 52

port RAM flag registers.

Failure of flag register

bit operations.

Port addressing failure

on data in ports 12—1F
(hex) of the dual port
RAM.

WALKIPORT Table3-3

Data mismatches in ports
12—1F (hex) in the dual

port RAM.

ECHO1FLAG Table 3-3

Failure during the echo

test of a dual port RAM
flag register.

ECHO1PORT Table3-3

TSTDPRWP

Table 3-3

CHKBADPAR Paragraph 5C

Subfailure
- code 01

Failure during dual port
RAM echo test.

Failure of dual port RAM

write protect circuit.

Servo/drive control parity

3.7.4

error, or an MDS PCA

Paragraph 5C
3.7.5

Parity circuitry
failure on S/DC PCA.

parity error.

RV20 Drive Off-Line Testing

3-31

Table 3-2 Failure/Subfailure Codes (Cont)
Fail.

Mnemonic (or

Maint.

CE Mode Tests

Code Subfail. Code)

Reference

That Failed

Description

Internal controller

7TA

3-32

Subfailure

Paragraph

code 02

3.7.56

Subfailure

Paragraph

code 03

3.7.5

Subfailure

Paragraph

code 04

3.7.5

Subfailure

Paragraph

code 20

3.7.56

Subfailure

Paragraph

code 21

3.7.5

Subfailure

Paragraph

code 22

3.7.5

Subfailure

Paragraph

code 23

3.7.5

Subfailure

Paragraph

code 24

3.7.5

Subfailure

Paragraph

code 25

3.7.5

Subfailure

Paragraph

code 26

3.7.5

Subfailure

Paragraph

code 27

3.7.5

Subfailure

Paragraph

code 28

3.7.5

Subfailure

Paragraph

code 29

3.7.5

Subfailure

Paragraph

code 2A

3.7.5

Subfailure

Paragraph

code 2B

3.7.5

RVZ20 Drive Off-Line Testing

parity error.
5C

Failure of 8039 to clear

S/DC parity error.

Failure of 8039 to
respond to a report error.

Read laser fault.

Write laser fault.

—

Quad sum fault.

—

Verify header fault.

—

Seek fault.

—

Data sync fault.

—

Wobble fault.

—

PLL fault.

—

Focus fault.

—

Line sync fault.

—

Motor speed fault.

—

MPU timeout fault.

Table 3-2 Failure/Subfailure Codes (Cont)
Fail.

Mnemonic (or

Maint.

CE Mode Tests

Code Subfail. Code)

Reference

That Failed

Description

—

MPU self-test fault.

—

Tracking fault.

Parity circuitry error

Subfailure

Paragraph

code 2C

3.7.5

Subfailure

Paragraph

code 2D

3.7.5

Subfailure
code 01

Paragraph
3.7.6

Subfailure
code 02

Paragraph
3.7.6

Parity error on the ISI
PCA.

Subfailure
code 03

Paragraph
3.7.6

Failure of 8039 to
accept clear errors

on the MDS PCA.

command.

Subfailure

Paragraph

code 04

3.7.6

Subfailure
code 05

Paragraph
3.7.6

BOS circuitry failure
on MDS PCA.

Subfailure
code 06

Paragraph
3.7.6

Sector interrupt.

Table 3-3

Failure of 8039 to
accept report errors
command.

Failure of the DRDW
threshold register on the
MDS PCA.

CLRLODECK Table3-3

51, 52

ENDLODECK Paragraph

Subfailure
code 2

51—5E, 61—6E

Drive diagnostic subtest

3.7.5

71—77

failure.

Table 3-4

51—5E, 61—6E
71—77

Failure of 8039 to
write/read to the dual
port RAM.

51—5E, 61—6E
71—717

Failure of 8031 to
write/read to the dual

- Drive reset failure.

Subfailure
code 03

Table 3-4

port RAM.

RV20 Drive Off-Line Testing

3-33

Table 3-2 Failure/Subfailure Codes (Cont)
Maint.

CE Mode Tests

Code Subfail. Code)

Reference

That Failed

Table 3-4

Fail.

Mnemonic (or

Subfailure

code 04
7E

Subfailure

Table 3-4

code 05
7E

Subfailure

Table 3-4

code 06
7E

Subfailure

Table 3-4

code 07

Subfailure

Table 3-4

code 08
7E

Subfailure

Table 3-4

code 09
7E

Subfailure

Table 3-4

code OA
7E

Subfailure

Table 3-4

code 0B
7E

Subfailure

Table 3-4

code 0C

Subfailure

Table 3-4

codes 0D—OF,

Description

51—5E,61—6E

Failure in dual port RAM

71—177

switch logic.

51—5E, 61—6E

Failure in 8031/8039 8-bit

71—77

communications bus.

51—5E,61—6E

Failure of 8039 internal

71—77

timer.

51—5E,61—6E

Failure of 8031 internal

71—77

timers.

51—5E, 61—6E

Failure of 8039 internal

71—77

RAM.

51—5E, 61—6E

Failure of 8031 internal

71—77

RAM.

51—5E,61—6E

Failure of 8031 program

71—1717

memory checksum.

51—56E, 61—6E

Failure of 8039 watchdog

71—77

timer.

51—5E,61—6E

Failure of 8031 watchdog

71—-717

timer.

51—5E,61—6E

8031-t0-8039

7177

communications

10, 11
7E

Subfailure

breakdown.
Table 3-4

codes 12,13

7TE

Subfailure

51—5E,61—6E

- T1-=77

Table 3-4

code 20

51—5E,61—6E.

Improper laser read
current low status at
power control loop reset.

Subfailure

Table 3-4

code 21

3-34

bits stuck on 1 or 0.

71—1717

Dual port RAM failure:

RV20 Drive Off-Line Testing

51—5E, 61—6E

Improper laser write

71—717

current low status at power

control loop reset.

Table 3-2 Failure/Subfailure Codes (Cont)
Fail. Mnemonic (or

CE Mode Tests

Reference

That Failed

Description

Subfailure
code 22

Table 3-4

51—5E, 61—6E
71—717

Improper laser read power
status at power control

Subfailure
code 23

Table 3-4

Subfailure
code 24

Table 3-4

Subfailure

Table 3-4

Code Subfail. Code)

Maint.

code 25

loop reset.

51—5E, 61—6E
71—717

Improper laser write power
status at power control
loop reset.

51—5E,61—6E
71—71

Improper laser dying
status at power control
loop reset.

51—5E, 61—6E
T1—77

Improper state of

diagnostic retract status

after focus retract for 5600

milliseconds.

Subfailure
code 26

Table 3-4

51—5E, 61—6E
T1—77

Improper laser read
current low status at
power control loop
initialization.

Subfailure

code 27

Table 3-4

51—5E, 61—6E
71177

Improper laser write

current low status at power
control loop
initialization.

Subfailure
code 28

Table 3-4

Subfailure

Table 3-4

code 29

Subfailure
code 2A

51—5E, 61—6E
T1—717

51—5E, 61—6E
71—177

Improper laser read power
low status at power control
loop initialization.

Improper laser write power

control loop

initialization.

Table 3-4

51—5E, 61—6E
71—717

Improper laser dying
status at power control
loop initialization.

RV20 Drive Off-Line Testing

3-35

Table 3-2 Failure/Subfailure Codes (Cont)
Fail.

Mnemonic (or

Maint.

CE Mode Tests

Code Subfail. Code)

Reference

That Failed

Description

Table 3-4

51—5E, 61—6E

Improper diagnostic retract

71—77

status during the focus

Subfailure

code 40

loop test. Status said
focus never retracted.

Subfailure

Table 3-4

code 41

51—5E, 61—6E
71—717

Improper diagnostic retract
status during the focus

loop test. Status said
focus was not in
equilibrium.

Subfailure

Table 3-4

code 42

51—5E,61—6E

Improper diagnostic retract

7177

status during the focus

loop test. Status said
focus never fully ramped to
upper limit of travel.
7E

Subfailure

Table 3-4

code 43

Subfailure

Table 3-4

code 44

51—5E, 61—6E

Drive did not capture focus

71—77

during the focus loop test.

51—5E,61—6E

Improper diagnostic

7177

S-curve in status during

the focus loop test. Status
said focus signal did not
have full sine wave.

Subfailure

Table 3-4

code 45

51—5E, 61—6E
71—77

Improper diagnostic
S-curve out status during

the focus loop test.

Status said focus signal
did not have full sine
wave.

Subfailure

Table 3-4

code 46
7E

Subfailure

Table 3-4

code 47

51—5E, 61—6E

Failure of carriage to

7177

retract.

51—5E,61—6E

Improper diagnostic

71—77

S-curve in status during
focus loop test. Status not

correct with focus at
retract.

3-36

RV20 Drive Off-Line Testing

Table 3-2 Failure/Subfailure Codes (Cont)
Fail.

Mnemonic (or

Maint.

CE Mode Tests

Code Subfail. Code)

Reference

That Failed

Description

Table 3-4

51—5E, 61 —6E
7177

Improper diagnostic
S-curve out status during

Subfailure
code 48

focus loop test. Status not

correct with focus at
retract.

Subfailure
code 49

Table 3-4
-

51—5E,61—6E
7177

Improper laser read power
during the focus loop test.
Status said the laser
shut off during the test.

Subfailure
code 4A

Table 3-4

51—5E, 61—6E
11-=-717

Improper diagnostic
S-curve in status during
focus loop test. Status did

not toggle during ramp up
of focus.

7TE

Subfailure
code 4B

Table 3-4

51—5E,61—6E
71—77

Improper diagnostic
S-curve out status during
focus loop test. Status did

not toggle during ramp up
of focus.

Subfailure
code 4C

Table 3-4

51—5E, 61—6E
71—77

Improper focus status
during the focus loop test.
Status not bad before focus

was initialized/captured.
7E

Subfailure
code 4D

Table 3-4

51—5E,61—6E
7177

Improper latched focus on
the SDC during the focus
loop test. Status did not

match focus status.
7E

Subfailure
code 60

Table 3-4

51—5E, 61—6E
71—717

Improper wobble status.
Wobble is good when it
should be bad.

Subfailure
code 61

Table 3-4

51—5E, 61—6E
7177
|

Improper wobble status.
Wobble is bad when it
should be good.

RVZ20 Drive Off-Line Testing

3-37

Table 3-2 Failure/Subfailure Codes (Cont)
Fail.

Maint,

CE Mode Tests

Code Subfail. Code)

Mnemonic (or

Reference

That Failed

Table 3-4

Subfailure

code 62

Description

51—5E,61—6E

Bad interrupt signal from

T1—77

the MDS to the SDC.
Interrupt signal is too

long.
7E

Subfailure

Table 3-4

code 63

51—5E,61—6E

No interrupt signal from

7T1—77

the MDS to the SDC.,
Interrupt of 8039 did not
occur,

Subfailure

Table 3-4

code 64

51—5E,61—6E

No interrupt signal from

71—717

the MDS to the SDC. No
interrupt signal within 10

milliseconds.

Subfailure

Table 3-4

code 70
7E

Subfailure
code 71

Subfailure

Table 3-4
|

Table 3-4

code 72

51—5E, 61—6E

Quadsum low status is not

71—77

bad when it should be.

51—5E, 61—6E

Quadsum low status is not

71—77

good when it should be.

51—5E,61—6E

Quadsum high status is

7177

not good when it should

be.
7E

Subfailure

Table 3-4

code 73
7TE

Subfailure

Table 3-4

code 74

51—5E, 61—6E

Line sync never

71—-77

initialized.

51—5E,61—6E

No 50/60 Hz signal from

T1—77

the power supply and line
sync never initialized.

Subfailure

Table 3-4

code 75

51—5E, 61—6E

Improper read current low

71—717

status with bad quadsum
low status. Status not
true when it should be.

Subfailure

Table 3-4

code 7E

51—5E, 61—6E

Lower deck not responding

711—717

to the upper deck for a
diagnostic command.

3-38

RV20 Drive Off-Line Testing

Table 3-2 Failure/Subfailure Codes (Cont)
Fail. Mnemonic (or

Maint.

CE Mode Tests

Code Subfail. Code)

Reference

That Failed

Description

Subfailure
code 80

Table 3-4

51—5E, 61—6E
71—77

Motor spin down time
exceeds 3 seconds.

Subfailure
code 81

Table 3-4

51—5E, 61—6E
71—"717

Motor speed greater than
3% above normal.

Subfailure
code 82

Table 3-4

51—5E, 61—6E
71—77

Motor speed is slower than
3% below normal.

Subfailure
code 83

Table 3-4

51—5E, 61—6E
T1—T17

Defective or blocked
tachsensor slot on the

Subfailure
code 90

Table 3-4

51—5E,61—6E
71—T77

Bad ‘““coarse status true”
with the FSM nulled.

Subfailure

Table 3-4

51—5E, 61—6E

Bad diagnostic position-in

code 91

spindle motor.

71—717

signal. Signal did not

change states with the
F'SM driven in a positive
and negative direction
after the FSM was
nulled.

Subfailure
code 92

Table 3-4

51—5E, 61—6E
7177

Bad diagnostic coarse
status. Signal did not

change states with the
F'SM driven in a positive
and negative direction
after the FSM was nulled
and the coarse loop
enabled.

Subfailure
code 93

Table 3-4

51—5E, 61—6E
71—"17

Bad diagnostic push-pull-in
signal. Signal did not

change states with the
F'SM driven in a positive
and negative direction
after the FSM was nulled
and the coarse and fine
loops were enabled.

RV20 Drive Off-Line Testing

3-39

Table 3-2 Failure/Subfailure Codes (Cont)
Fail.

Maint.

CE Mode Tests

Code Subfail. Code)

Mnemonic (or

Reference

That Failed

Table 3-4

51—5E, 61 —6E

Bad diagnostic

71—77

push-pull-out signal,

Subfailure

code 94

Description

Signal did not change

states with the FSM driven
in a positive and negative
direction after AGC, the
F'SM was nulled and the

coarse and fine loops
were enabled.
7E

Subfailure

Table 3-4

code 95

51—5E, 61—6E

Bad tracking polarity

71—77

status. Signal did not
change states with the
FSM driven in a positive

and negative direction
after the FSM was nulled
and the coarse and fine

loops were enabled.
7E

Subfailure

Table 3-4

code 96

51—5E, 61—6E

7177

Bad track crossing status.

Signal did not change
states with the FSM driven
in a positive and negative

direction after AGC, the
FSM was nulled and the
coarse and fine loops were

enabled.

Subfailure

Table 3-4

code 97
7E

Subfailure

51—5E, 61—6E

Bad position LED status.

T1—717
Table 3-4

code 98

51—5E,61—6E

Bad diagnostic tracking

71—717

status. Status did not
come true with the coarse

and fine loops closed.
7E

Subfailure

Table 3-4

code 9A

3-40

RV20 Drive Off-Line Testing

51—5E, 61—6E

Bad carriage lock

T1—-77

assembly.

Table 3-2 Failure/Subfailure Codes (Cont)
CE Mode Tests

Fail.

Mnemonic (or

Maint.

Code Subfail. Code)

Reference

That Failed

Description

Subfailure

Table 3-4

51—5E, 61—6E

Tracking would not

7177

initialize.

Subfailure
code 9C

Table 3-4

51-5E, 61-6E
71-77

“Off track status’ not
bad with tracking disabled.

Subfailure
code B0

Table 3-4

51—5E, 61—6E
71—1717

Retract sensor did not
change states during a

code 9B

seek out from the home
position.

Subfailure
code B1

Table 3-4

Subfailure
code B2

Table 3-4

51—5E, 61—6E
7177

8031 failed to read headers
during a seek. No reading
headers signal.

51—5E, 61—6E
7117

Failure with data sync
during a seek by the 8031.
Reading header signal, but
no data sync.

Subfailure
code B3

Table 3-4

51—5E, 61—6E
71—717

8031 did not get access to
the dual port RAM during
a seek and, therefore,

could not read headers.

7E
7E

Subfailure

code B4

Table 3-4

Subfailure
code B5

Table 3-4

Subfailure
code B6

Table 3-4

51—5E,61—6E Failure in reading headers
71—77

by the 8031 during a seek.

51—5E, 61—6E
T1—77

Failure in track crossings
during a seek by 8031.

51—5E, 61—6E
~
71—77

Failure in tracking after a
seek by the 8031. 8031

No matching headers.

8031 lost track crossings.

could not capture tracking
after a seek.

Subfailure
code B9

Table 3-4

51—5E, 61—6E
7177

8031 unable to complete a
seek after maximum
retries applied.

RV20 Drive Off-Line Testing

3-41

Table 3-2 Failure/Subfailure Codes (Cont)

Fail. Mnémonic (or

Maint.

CE Mode Tests

Code Subfail. Code)

Reference

That Failed

Table 3-4

Subfailure

code BA

Subfailure

Table 3-4

code BC
TE

Subfailure

Table 3-4

code CO

Description

51—5E,61—6E

No increment track signal

71717

on the SDC.

51—5E,61—6E

No sequential sectors read

71—1717

by 8031 during a seek.

51—5E,61—6E

Bad reading header signal

71—717

during the reading
header/increment track
signal test.

Subfailure

Table3-4

code C1

51—5E, 61—6E

Phase-lock loop (PLL)

7177

status was good when it
should be bad.

Subfailure

Table 3-4

code C2
7E

Subfailure

Table 3-4

code C3

Subfailure

Table 3-4

code C4

Subfailure

Table 3-4

code C5
7E

Subfailure

Table 3-4

code C6

51—5E,61—6E

Bad data sync status when

7171

it should be good.

51—5E,61—6E

Sync lost status was bad

7177

when it should be good.

51—5E, 61—6E

Good data sync status

71717

when it should be bad.

51—5E, 61—6E

Sync lost status was good

71-177

when it should be bad.

51—5E,61—6E

Phase-lock loop (PLL)

71-=-T77

status was bad when it
should be good.

Subfailure

Table 3-4

code C1

51—5E, 61—6E

7171

Phase-lock loop (PLL)

status was good when it
should be bad.

Subfailure =

Table3-4

code C2

Subfailure

Table 3-4

code C3

3-42

RV20 Drive Off-Line Testing

51—5E,61—6E

Bad data sync status when

7177

it should be good.

51—5E,61—6E

Sync lost status was bad

7177

when it should be good.

Table 3-2 Failure/Subfailure Codes (Cont)
Fail. Mnemonic (or

Maint.

CE Mode Tests

Code Subfail. Code)

Reference

That Failed

Description

Subfailure
code C4

Table 3-4

51—5E,61—6E
71—177

Good data sync status
when it should be bad.

Subfailure
code CH

Table 3-4

51—5E, 61—6E
71—77

Sync lost status was good
when it should be bad.

Subfailure
code C6

Table 3-4

51—5E, 61—6E
71—717

Phase-lock loop (PLL)
status was bad when it
should be good.

CHECKCART Paragraph 61—6E, 71—77

3.7.9

3.7.10

Data cartridge not

inserted in the drive.

Start/Stop switch on

the operator panel is
not depressed to the

Start position.

SET-UPECC

Paragraph 31—33

IDENT-ECC

Table3-3

31,32

ENCODE-DF

Table 3-3

DECODE-DF

Table 3-3

ENCODE-VA Table3-3

DECODE-VA

Table 3-3

ENCODE-PF

Table 3-3

DECODE-PF

Table3-3

3.7.11

ECC data buffer number

exceeds 48 (decimal).

Improper response from
the ECC PCA.

Failure to encode the user
data field.

Failure to decode the user
data field.

Failure to encode the

vector address field.

Failure to decode the
vector address field.

Failure to encode the
postfield.

Failure to decode the
postfield.

RV20 Drive Off-Line Testing

3-43

Table 3-2 Failure/Subfailure Codes (Cont)

Fail.

Maint.

CE Mode Tests

Code Subfail. Code)

Mnemonic (or

Reference

That Failed

Table 3-3

KILL-DF

Description
Failure of the ECC PCA to
correct an erroneous user

data field.

KILL-VA

Table 3-3

ECC PCA failed to correct
an erroneous vector

address.

KILL-PF

Table 3-3

ECC PCA failed to correct
an erroneous postfield.

- 9C

CHKDMAWRT Table 3-3

Addressing failure after
DMA write.

KILL-VA

Paragraph

Al, A2

3.7.12

Subfailure

Paragraph

code 01

3.7.12

Subfailure

Paragraph

code 02

3.7.12

EERAMTEST

Table3-3

Bad controller parity.

Bad EEPROM parity.

Al, A2

Failure in volatile RAM of
EEPROM.

EECHKSUM

Table3-3

Al, A2

Failure of EEPROM
checksum.

SPINUP

Table 3-5

77X

Drive not READY within
five and one half seconds

of a spinup command.

CO0

Subfailure

Table 3-6

—

code 01

CO0

Subfailure

cartridge present

status.

Table 3-6

—

code 02

Start/Stop switch not
pressed in.

Table 3-6

code 03

—

No device fault or device
error occurred, yet
drive is not READY.

3-44

RV20 Drive Off-Line Testing

Table 3-2 Failure/Subfailure Codes (Cont)
Fail.

Mnemonic (or

Maint.

- CE Mode Tésts

That Failed

Description

Table 3-6

—

Power supply overtemperature condition.

Subfailure

Table 3-6

—

Subfailure

Table 3-5

C0O0

Subfailure
codes B1—BC

Table 3-5

Cl1

Subfailure

Paragraph —
3.7.14

‘accept spindown command.

Subfailure
code 02

Paragraph —
3.7.14

No device error occurred,
yet drive did not spin

Code Subfail. Code)

Reference

Subfailure
code 04

CO0

code 06

codes 20—2D

code 01

Card cage overtemperature

condition.

Refer to code 7A, sub-

failure codes 20—2D.

—

to code 7E, subRefer
failure codes B1—BC.

Failure of 8039 to

down within five seconds.

Paragraph
3.7.14

—

Subfailure
code 03

NO-JUMPBK Paragraph 72
3.7.15

Excess error recovery
in the drive.

Jumpbacks occurring when

they are disabled, or

drive is unable to spiral

across media.

Subfailure
code 01

Paragraph —
3.7.15
|

Failure of 8039 to respond
to a disable jumpbacks
command.

Subfailure
code 02

Paragraph —
3.7.15

Failure of 8039 to
acknowledge a disable

Subfailure
code 03

Paragraph
3.7.15

Subfailure

Paragraph —

code 04

3.7.15

—

jumpbacks command.

Excess error recovery
in the drive.

Seek to track 1000

aborted, 8039 busy.

RV20 Drive Off-Line Testing

3-45

Table 3-2 Failure/Subfailure Codes (Cont)

Fail.

Mnemonic (or

Maint.

CE Mode Tests

Code Subfail. Code)

Reference

That Failed

Description

Subfailure

Paragraph

—

Seek to track 1000 not

code 05

3.7.15

initiated after seek
command accepted by

the 8039.

Subfailure

Paragraph

code 06

3.7.15

Subfailure

Paragraph

code 07

3.7.15

—

No on-track status after
seek was initiated.

—

Drive not spiraling across
10 tracks within 150 milliseconds.

C2
C2

Subfailure

Paragraph

code 0A

3.7.15

Subfailure
code 0B

Paragraph

—

3.7.156

8039 does not respond to
a clear errors command.

Subfailure

Paragraph

Refer to code 7A, sub-

codes 20—2D

3.7.15

failure codes 20—2D.

Subfailure

Paragraph

Refer to code 7E, sub-

codes B1—BC

3.7.15

failure codes B1—BC.

JUMPBK-TST Paragraph

3.7.16

Seek error, no seek byte
status available.

Subfailure

Paragraph

code 01

3.7.16

Failure of jumpbacks
when they are enabled.

—

Failure of 8039 to respond
to an enable jumpbacks
command.

Subfailure

Paragraph

code 02

3.7.16

Subfailure

Paragraph

code 03

3.7.16

Subfailure

Paragraph

code 04

3.7.16

—

Excess error recovery
in the drive.

—

Seek to track 1000
aborted, 8039 busy.

—

Seek to track 1000 not
initiated after seek
command accepted by
the 8039.

3-46

RV20 Drive Off-Line Testing

Table 3-2 Failure/Subfailure Codes (Cont)
Fail. Mnemonic (or

Code Subfail. Code)

Maint.

Reference

CE Mode Tests

That Failed

Description

Subfailure
code 05

Paragraph —
3.7.16

No on-track status
after seek was initiated.

Subfailure
code 06

Paragraph —
3.7.16

Drive not spiraling across
10 tracks within 150 milli-

Subfailure
code 07

Paragraph —
3.7.16

Good on-track status when
it should be bad.

Subfailure
code 08

Paragraph —
3.7.16

Seek to track 0 not
successful.

Subfailure

Paragraph —

Jumpback not occurring,

3.7.16

no device fault or error.

Subfailure
code 0A

Paragraph —
3.7.16

Seek error, no seek byte
status available.

Subfailure

Paragraph —
3.7.16

a clear errors command.

Subfailure
code 0C

Paragraph —
3.7.16

Power supply overtemperature condition.

Subfailure
code 0D

Paragraph —
3.7.16

Card cage overtemperature condition.

Subfailure
codes 20—2D

Paragraph
3.7.16

Refer to code 7A, subfailure codes 20—2D.

Paragraph
Subfailure
codes B1—BC 3.7.16

Refer to code 7E, subfailure codes B1—BC.

OCIL-SEEK

code 09

code 0B

seconds

Paragraph 72
3.7.17

8039 does not respond to

Failure to perform

seeks within a specified
time.

Subfailure
code 01

Paragraph —
3.7.17

Failure of 8039 to
respond to an enable
jumpbacks command.

RV20 Drive Off-Line Testing

3-47

Table 3-2 Failure/Subfailure Codes (Cont)

Fail.

Maint.

CE Mode Tests

Code Subfail. Code)

Mnemonic (or

Reference

That Failed

Description

Subfailure

Paragraph

—

Failure of 8039 to

code 02

3.7.17

respond to a report
errors command.

Subfailure

Paragraph

code 03

3.7.17

Subfailure

Paragraph

code 04

3.7.17

Subfailure

Paragraph

code 05

3.7.17

—

Excess error recovery
in the drive.

—

Seek to track 1000
aborted, 8039 busy.

—

Seek not initiated
after seek command

accepted by the 8039.

Subfailure

Paragraph

code 06

3.7.17

Subfailure

Paragraph

code 07

3.7.17

—

No on-track status after
seek was initiated.

—

Drive unable to per-

form a series of
two-track seeks.

Subfailure

Paragraph

code 08

3.7.17

—

Drive unable to perform a series of
hundred-track seeks.

Subfailure

Paragraph

code OA

3.7.17

Subfailure

Paragraph

code OB

3.7.17

—

Seek error, no seek
byte status available.

—

8039 does not respond
to a clear errors
command.

3-48

Subfailure

Paragraph

Refer to code 7A, sub-

codes 20—2D

3.7.17

failure codes 20—2D.

Subfailure

Paragraph

Refer to code 7E, sub-

codes B1—BC

3.7.17

failure codes B1—BC.

RVZ20 Drive Off-Line Testing

Table 3-3 SAM Failure Codes
SAM FAILURE CODE -->

Replace the
ISI

312

OF,

|12

[13}17

182021 | 22|23

PCA.

Replace the
ECC

14,16,

0€,|

01-04f 05,06|07+] 08]09] 0A,0B+|OC*{OD | 11

PCA.

Replace the card

Replace the

Verify that all

card rack backplane
cables are properly
installed/seated at

311

both .ends.

rack

S/DC

backplane.

Replace the

MDS

PCA.

Replace the guard

Replace the baseplate

band

PCA.

Replace the
R/WC

PCA.

sensor.

terminator

PCA.

Replace the carriage.
ESG

PCA.

Replace

the

Replace
Systems

the Servo
PCA.

the power
supply to backplane
power supply
control cable.
Replace

Replace the
power supply.
Replace

the

tachometer.

Replace the spindle
brake assembly
(if applicable).
Inspect spindle belt.
I1f 0K, replace the
spindle motor assembly.

RV20 Drive Off-Line Testing

3-49

Table 3-3 SAM Failure Codes (Cont)
SAM

Replace
ISI

the

PCA.

Verify that all
card rack backplane
cables are properly
installed/seated at
both ends.
Replace the card
rack backplane.

Replace the
S/DC PCA.
Replace
MDS

the

PCA.

Replace the
R/WC PCA.

Replace
band

the

guard

sensor.

Replace

the

terminator

baseplate
PCA.

Replace

the

carriage.

Replace

the

ESG

Replace

the

Servo

Systems

PCA.

Reptace the
power supply to
backplane power
supply control cable.
Replace the
power supply.
Replace

the

tachometer.

Replace the spindle
brake assembly
(if applicable).
Inspect spindle belt.
If 0K, replace the
spindle motor
assembly.
Verify

that
terminators are
installed and that
the ISI bus cable
is disconnected.
In the master RV20,
remove the drive
subsystem
controller.

3-560

37-39,
3A-3F

41,44-46
2

PCA.

Replace
ECC

-->

CODE

FAILURE

RV20 Drive Off-Line Testing

Table 3-3 SAM Failure Codes (Cont)
5A-50,
SAM

FAILURE

Replace
IS1

-->

the

50-59

SF,60,61

62,64

63,65-68]69
2

6A,68

6C,6E

PCA.

Replace
ECC

CODE

the

PCA.

Verify that all
card rack backplane

cables are properly
installed/seated at

both

ends.

Replace

the

Replace

the

rack

S/0C

PCA.

Replace
MDS

the

PCA.

Replace
band

the

PCA.

Replace
R/WC

card

backplane.

the

guard

sensor.

Replace the baseplate
terminator PCA.
Replace

the

carriage.

Replace

the

ESG

PCA.

Replace the Servo
Systems PCA.
Replace the power
supply to backplane
power supply
control cable.
Replace the
power supply.
Replace

the

tachometer.

Replace the spindle
brake assembly
(if applicable).
Inspect spindle
bett. If 0K,

replace the spindle
motor assembly.
Verify

that

terminators

are

installed and that
the ISI bus cable
ijs disconnected.
In the master RV20,
remove the drive
subsystem

controller.

RV20 Drive Off-Line Testing

3-51

Table 3-3 SAM Failure Codes (Cont)
SAM

Replace
ISI

the

72-78

91-99,9A

9cC

PCA.

the

Replace
ECC

-->

CODE

FAILURE

PCA.

Verify that all
card rack backplane
cables are properly
installed/seated at
both ends.
Replace the card
rack backplane.

Replace the
S/DC PCA.

Replace the
MDS PCA.
ReplLace the
R/WC PCA.
Replace
band

the

guard

sensor.

Replace the baseplate
terminator PCA.
Replace

the

carriage.

Replace

the

ESG

Replace

the

Servo

Systems

PCA.

Replace

the power
supply to backplane
power supply
control cable.

Replace the
power supply.
Replace

the

tachometer.
Replace the spindle
brake assembly
(if applicable).
Inspect spindle belt.
If 0K, replace the
spindle motor
assembly.
*

Refer

3-62

Paragraph

3.7.1

before

beginning

RV20 Drive Off-Line Testing

these

procedures.

9€E,9F

Table 3-4 SAM Failure Code 7E, Subfailure Codes
SAM

FAILURE

SUBFAILURE

Replace

CODE

7E,

CODE

-->

ESG

PCA.

the

02-09,0A-0F,
10, 12, 13

20-24,
26-29,
2A

40-42|43)

44|

45,48 | 46|

47,4A)

48] 4c]4D]

Verify that all
card rack backplane
cables are properly
installed/seated at
both ends.

Replace

the

carriage.

Replace

the

Servo

Replace

the

S/DC

Replace

the

R/WC

Replace

the

ISI

PCA.

Replace

the

MDS

PCA.

Try a new
cartidge.

PCA.

Systems

PCA.

data

Replace carriage
lock solenoid.
Replace
band

the

gquard

sensor.

Inspect spindle belt.
If OK, replace the

spindle motor
assembly.
Replace

the

terminator

baseplate
PCA.

Replace the
power supply.
Replace the
tachometer sensor.

Replace the spindle
brake assembly
(if applicable).

RV20 Drive Off-Line Testing

3-53

Table 3-4 SAM Failure Code 7E, Subfailure Codes (Cont)
SAM

Replace

7E,

CODE

FAILURE

SUBFAILURE

CODE

-->

ESG

PCA.

the

62-64

71,72,
75

Verify that all
card rack backplane
cables are properly
installed/seated
at both ends.

Replace

carriage.

the

Replace the
Servo Systems

PCA.

Replace

the

S/DC

Replace

the

R/WC

Replace

the

ISI

PCA.

Replace

the

MDS

PCA.

Try a new data
cartridge.

Replace carriage
lock solenoid.

Replace
band

the

gquard

sensor.

Replace the spindle
motor assembly.
Replace

the

baseplate

terminator

PCA.

Replace the
power supply.

Replace the
tachometer sensor.

Replace the spindle
brake assembly.
(if applicable).
Check and clean any
tachsensor slots on
the tachometer.

3-64

RV20 Drive Off-Line Testing

94,
83

Table 3-4 SAM Failure Code 7E, Subfailure Codes (Cont)
SAM

FAILURE

SUBFAILURE

CODE

-->

ESG

PCA.

the

Replace

B1,82,

7E,

CODE

9cC

B3,8BA|

BS]|

B6|

B9]

BC}

CO}J

}C3 | CS5

Verify that all
card rack backplane
cables are properly
installed/seated at
ends.

both

carriage.

Replace

the

Replace
Systems

the Servo
PCA.

Replace

the

PCA.

S/DC

Replace the
R/WC PCA.

Reptace

ISI

Replace

the

MDS

PCA.

Try

PCA.

data

new

cartridge.

Replace carriage
lock solenoid.

guard

the

Replace
band

sensor.

Inspect spindle belt.
If OK, replace the

spindle motor
assembly.

the baseplate

Replace

terminator

PCA.

Replace the
power supply.

the

Replace

tachometer

Replace

the

Verify

that

sensor.

spindle

brake assembly
(if applicable).
connectors

on baseplate terminator
PCA and card rack
backplane are properly
installed.

Verify that
band sensor
mounted and
mounting
tight.

the guard
is properly
that

screws

are

RV20 Drive Off-Line Testing

3-66

‘Table 3-56 SAM Failure Code C0, Subfailure Codes
SAM

FAILURE

SUBFAILURE

CODE cCO,
CODE -->

Replace

data

Replace

the

terminator

Verify
Stop

baseplate
PCA.

that

switch

START

cartridge.

Start/
is

position.

Replace

the

Verify

that

S/DC

PCA.

inter-

connect cable is
properly installed
from

operator

J38

panel

backplane.

Replace

operator

Replace

the

ESG

panel.
PCA.

Replace the spindle
brake assembly
(when applicable).
Inspect spindle belt.
0K, replace the
motor

I1f

spindle

assembly.

Verify
rack
are

that all card
backplane cables

properly

seated

installed/

both

ends.

Replace

the

R/WC

Replace

the

carriage.

PCA.

Replace

the

MDS

Replace

the

Servo

Systems

PCA.

Replace

the

Replace

power

Replace
to

PCA.

supply.

power

backplane

supply

ESG

PCA.

supply
power

control

cable.

Replace

the

tachometer.

Replace

fan

assembly.

3-66

RV20 Drive Off-Line Testing

3.7.1 SAM Failure Codes 07, 0B, and 0C
When SAM failure code 07, 0B, or OC is displayed, the problem is that the
carriage is failing to find the home position. Proceed as follows.

Remove the top cover and the disc.

2. Power down the drive and wait 30 seconds. Note that the Carriage is in the
home position.

Power the drive up again and observe the carriage. The carriage should

move to the rear (about one-half inch) and then return back to the home

position. It should remain there, locked by the solenoid.

If any of the following occur, power down the drive and proceed to steps 4
through 8.

The carriage makes a high pitched sound while moving to the home
position.

The carriage moves to the home position more than once.

The carriage doesn’t move at all.

If a, b, or ¢ did not occur, then proceed directly to step 9.

Check to make sure the carriage is not rubbing against the guard band
sensor, the solenoid, or the magnet. Check to make sure the carriage rails

are not damaged and are free from dirt.

Check to make sure that the carriage isn't stuck to the rubber bumper.

Check all connections on the baseplate terminator PCA.

Power up the drive again. If steps 4 to 6 do not correct the problem, re-

place the guard band sensor as described in Chapter 4.

If step 7 doesn’t solve the problem, replace the baseplate terminator PCA
|

as described in Chapter 4.

9. If step 8 doesn’t solve the problem, proceed with the corrective actibns
given in Table 3-3 for the specific failure code (07, 0B, or 0C).

RV20 Drive Off-Line Testing

3-57

3.7.2 SAM Failure Code 42
When SAM failure code 42 is displayed, there is an accompanying subfailure
code. The subfailure code determines what corrective actions have to be taken.

There can be subfailure codes of 01, 02, or 03.

To find the subfailure code, gain access to the maintenance panel on the front

of the drive and press F1. The subfailure code appears on the operator panel
hexadecimal display while F1 is pressed. The corrective actions that need to be

performed for each of the two subfailure codes are listed below.
After performing a corrective action for a subfailure code, always run all the

tests again to see if that procedure solved the problem. If the problem still
exists, perform the next procedure.

SUBFAILURE CODE 01
Replace the MDS PCA as described in Chapter 4.
Replace the ECC PCA as described in Chapter 4.
Replace the ISI PCA as described in Chapter 4.

Replace the R/WC PCA as described in Chapter 4.
Verify that all the card rack backplane cables are properly installed and are

seated at both ends.
6.

Replace the card rack backplane as described in Chapter 4.

SUBFAILURE CODE 02

Replace the S/DC PCA as described in Chapter 4.

Verify that all the card rack backplane cables are properly installed and are

Replace the card rack backplane as descrlbed in Chapte1 4,

seated at both ends.

SUBFAILURE CODE 03
1.

Replace the MDS PCA as describedin Chapter 4,

Replace the S/DC PCA as describedin Chapter
4

Replace the R/WC PCA as described in Chapter 4
Verify that all the card rack backplane cables are properly 1nstalled and are

seated at both ends.

3-68

Replace the card rack backplane as described in Chapter 4.

RV20 Drive Off-Line Testing

3.7.3 SAM Failure Code 43

When SAM failure code 43 is displayed, there is an accompanying subfailure
code. The subfailure code determines what corrective actions have to be taken.
There are 17 possible subfailure codes for code 43. They are as follows.
01, 02, 03, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 2A, 2B, 2C, 2D

After performing a corrective action for a subfailure code, always run all the
tests again to see if that procedure solved the problem. If the problem still
exists, perform the next procedure.
SUBFAILURE CODE 01

Replace the MDS PCA as described in Chapter 4.
Replace the ECC PCA as described in Chapter 4.
Replace the ISI PCA as described in Chapter 4.
Replace the R/IWC PCA as described in Chapter 4

Verify that all the card rack backplane cables are properly installed and are
6.

seated at both ends.

Replace the card rack backplane as described in Chapter 4

SUBFAILURE CODE 02

Replace the S/DC PCA as described in Chapter 4

Verify that all the card rack backplane cables are properly installed and are

Replace the card rack backplane as described in Chapter 4,

seated at both ends.

SUBFAILURE CODE 03

Replace the MDS PCA as described in Chapter 4
Replace the S/DC PCA as described in Chapter 4.
Replace the ISI PCA as described in Chapter 4.
Replace the R/WC PCA as described in Chapter 4.

Verify that all the card rack backplane cables are properly installed and are
6.

seated at both ends.

Replace the card rack backplane as described in Chapter 4.

RV20 Drive Off-Line Testing

3-59

SUBFAILURE CODES 20 — 2D
These subfailure codes correspond to the subfailure codes for SAM failure code

CO that are listed in Table 3-5. Refer to Table 3-5 for the proper corrective

actions for these subfailure codes.
For example, the corrective action for SAM code 43, subfailure code 23, 1s the
same as for SAM code CO0, subfailure code 23.

3.7.4 SAM Failure Code 4F

When SAM failure code 4F is displayed, there is an accompanying subfailure

code. The subfailure code determines what corrective actions have to be taken.,

There are 16 possible subfailure codes for code 4F. They are as follows.
01, 02, 03, 04, 05, 06, 07, 08, 09, 0A, 0B, 0C, 0D, OE, OF, 20

To find the subfailure code, gain access to the maintenance panel on the front
of the drive and press F1. The subfailure code appears on the operator panel

hexadecimal display while F1 is pressed. The subfailure codes are listed below,

followed by the actions that need to be taken to correct the problem.

After performing a procedure for a subfailure code, always repeat all the tests
to see if that procedure solved the problem. If the problem still exists, perform

the next procedure.

SUBFAILURE CODES 01, 02, OF, and 20
1.
2.

Replace the ISI controller PCA as described in Chapter 4.
Verify that all the card rack backplane cables are properly installed and

Replace the card rack backplane as described in Chapter 4.

seated at both ends.

SUBFAILURE CODES 03 — O0E
1.

Replace the ECC PCA as described in Chapter 4.

Verify that all the card rack backplane cables are properly installed and

seated at both ends.
3.

3-60

Replace the card rack backplane as described in Chapter 4.

RV20 Drive Off-Line Testing

3.7.5 SAM Failure Code 79

When SAM failure code 79 is displayed, there is an accompanying subfailure

code. The subfailure code determines what corrective actions have to be taken.

To find the subfailure code, gain access to the maintenance panel on the front
of the drive and press F1. The subfailure code appears on the operator panel
hexadecimal display while F1 is pressed.

If subfailure codes 01, 02, or 03 are displayed while pressing F1, then pro-

ceed to steps 2 through 5. If a subfailure code other than 01, 02, or 03
appears while pressing F'1, then replace the MDS PCA as described in
4
Chapter

Replace the S/DC PCA as described in Chapter 4. After the PCA has been
replaced, run all the tests again. If subfailure code 01, 02, or 03 is still
present, proceed to step 3.

3. Replace the MDS PCA as described in Chapter 4. After the PCA has been
replaced, run all the tests again. If subfailure code 01, 02, or 03 is still
present, proceed to step 4.

Verify that all the card rack backplane cables are properly installed and are

Replace the card rack backplane as described in Chapter 4.

seated at both ends. Then run all the tests again. If a subfailure code is
|
still present, proceed to step 5.

3.7.6 SAM Failure Code 7A

When SAleailure code 7A is displayed, there is an accompanying subfailure

code. The subfailure code determines what corrective actions have to be taken,
There are 18 possible subfailure codes for code 7A. They are as follows.
01, 02, 03, 04, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 2A, 2B, 2C, 2D

After performing a corrective action for a subfailure code, always run all the
tests again to see if that procedure solved the problem. If the problem still
exists, perform the next procedure.

RV20 Drive Off-Line Testing

3-61

SUBFAILURE CODES 01, 03, and 04
1.

Replace the S/DC PCA as describedin Chapter 4.

Verify that all the card rack backplane cables are properly installed and are

Replace the card rack backplane as described in Chapter 4.

seated at both ends.

SUBFAILURE CODE 02
1.

Replace the IST PCA as described in Chapter 4.

Replace the S/DC PCA as described in Chapter 4.

Verify that all the card rack backplane cables are properly installed and are

Replace the card rack backplane as described in Chapter 4.

seated at both ends.

SUBFAILURE CODES 20 — 2D
These subfailure codes correspond to the subfailure codes for SAM failure code
CO that are listed in Table 3-5. Refer to Table 3-5 for the proper correctlve
actions for these subfailure codes.
For example, the corrective action for SAM code 7A, subfailure code 23, is the

same as for SAM code CO, subfailure code 23.

3.7.7 SAM Failure Code 7B
When SAM failure code 7B is displayed, there is an accompanying subfailure

code. The subfailure code determines what corrective actions have to be taken.
There are 20 possible subfailure codes for code 7B. They are as follows.

01, 02, 03, 04, 05, 06, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 2A, 2B, 2C, 2D
To find the subfailure code, gain access to the maintenance panel on the front

of the drive and press F1. The subfailure code appears on the operator panel
hexadecimal display while F1 is pressed. The corrective actions that need to be

performed for each of the subfailure codes are listed below.
After performing a corrective action for a subfailure code, always run all the

tests again to see if that procedure solved the problem. If the problem still
exists, perform the next procedure.

3-62

RV20 Drive Off-Line Testing

SUBFAILURE CODE 01

Replace the MDS PCA as described in Chapter 4.

Verify that all the card rack backplane cables are properly installed and are

Replace the card rack backplane as described in Chapter 4.

seated at both ends.

SUBFAILURE CODE 02

Replace the ISI PCA as described in Chapter 4.

Verify that all the card rack backplane cables are properly installed and are

Replace the card rack backplane as described in Chapter 4.

seated at both ends.

SUBFAILURE CODES 03 and 04

1.
2.

Replace the S/DC PCA as described in Chapter 4.
Replace the ISI PCA as described in Chapter 4.

Verify that all the card rack backplane cables are properly installed and are

Replace the card rack backplane as described in Chapter 4.

seated at both ends.

SUBFAILURE CODES 05 and 06

1.
2.
3.

Replace the MDS PCA as described in Chapter 4.
Replace the S/DC PCA as described in Chapter 4.
Replace the ISI PCA as described in Chapter 4.

Verify that all the card rack backplane cables are properly installed and are

Replace the card rack backplane as described in Chapter 4.

seated at both ends.

SUBFAILURE CODES 20 — 2D

These subfailure codes correspond to the subfailure codes for SAM failure code
CO0 that are listed in Table 3-5. Refer to Table 3-5 for the proper corrective
|

action for these subfailure codes.

For example, the corrective action for SAM code 7B, subfailure code 23, is the
same as for SAM code CO0, subfailure code 23.

RV20 Drive Off-Line Testing

3-63

3.7.8 SAM Failure Code 7E

When SAM failure code 7E is displayedc, there is an accompanying subfailure
code. The subfailure code determines what corrective actions have to be taken.
There are 91 different subfailure codes for SAM failure code 7E. They are lis-

ted in Table 3-4.

To find the subfailure code, gain access to the maintenance panel on the front
of the drive and press F'1. The subfailure code appears on the operator panel
hexadecimal display while F1 is pressed. Each of the subfailure codes is listed

in Table 3-4 with the actions that need to be taken to correct the problem.

After you perform a procedure in Table 3-4, always repeat all the tests to see if
that procedure solved the problem. If the problem still exists, go on to the next
procedure for that failure code in Table 3-4.

3.7.9 SAM Failure Code 80
When SAM failure code 80 is displayed, the problem may be that there is no
data cartridge in the drive. If this is the case, insert a data cartridge into the

drive and run all the tests again. If failure code 80 comes up again, proceed to
step 1.

Replace the S/DC PCA as described in Chapter 4. After the PCA has been

replaced, run all the tests again. If failure code 80 appears again, proceed
to step 2.

Replace the ISI controller PCA as described in Chapter 4. After the PCA
has been replaced, run all the tests again. If failure code 80 appears again,

proceed to step 3.

Verify that all the card rack backplane cables are properly installed and
seated at both ends. Then run all the tests again, If failure code 80 appears again, proceed to step 4.

Replace the baseplate terminator PCA as described in Chapter 4. After the
PCA has been replaced, run all the tests again. If failure code 80 appears
again, proceed to step 5.

Replace the operator panel as described in Chapter 4. After replacing the
operator panel, run all the tests again. If failure code 80 appears again,

proceed to step 6.

3-64

Replace the card rack backplane as described in Chapter 4.

RV20 Drive Off-Line Testing

3.7.10 SAM Failure Code 81
When SAM failure code 81 is displayed, the problem may
be that the Start/
Stop switch on the front panel is not in the START position. If this is the
case, put the switch into the START position and run all the tests again. If
failure code 81 appears again, proceed to step 1.

Replace the S/IDC PCA as described in Chapter 4. After the PCA has been
replaced, run all the tests again. If failure code 81 appears again, proceed
to step 2.

Replace the ISI PCA as described in Chapter 4. After the PCA has been
replaced, run all the tests again. If failure code 81 appears again, proceed
to step 3.

Verify that all the card rack backplane cables are properly installed and
seated at both ends. Then run all the tests again. If failure code 81 appears again, proceed to step 4.

Replace the operator panel as described in Chapter 4. After replacing the
operator panel, run all the tests again. If failure code 81 appears again,
proceed to step 5.

Replace the card rack backplane as described in Chapter 4.

3.7.11 SAM Failure Code 90
When SAM failure code 90 is displayed, the problem may be that the proper

ECC parameter has not been entered.

Use the instructions in Paragraph 3.6.2 to access the ECC parameters section
of memory. The second memory location in the ECC area is the “Number of
Bytes/codewords to be altered.” This number should be 30 hexadecimal (48
decimal) or less. If the memory contains a number larger than 30, reset it to
30. After resetting the ECC parameter, run all CE mode tests again. If SAM
failure code 90 appears again, proceed as follows.

Replace the ECC PCA as described in Chapter 4. After the PCA has been
replaced, run all the tests again. If failure code 90 appears again, proceed
to step 2.

Replace the ISI PCA as described in Chapter 4. After the PCA has been
replaced, run all the tests again. If failure code 90 appears again, proceed
to step 3.

RV20 Drive Off-Line Testing

3-65

Verify that all the card rack backplane cables are properly installed and
seated at both ends. Then run all the tests again. If failure code 90 appears again, proceed to step 4.

Replace the card rack backplane as described in Chapter 4.

3.7.12 SAM Failure Code 9D
When SAM failure code 9D is displayed, there is an accompanying subfailure

code. The subfailure code determines what corrective actions have to be taken.
There are two subfailure codes for SAM failure code 9D: 01 and 02.
To find the subfailure code, gain access to the maintenance panel on the front
of the drive and press F1. The subfailure code appears on the operator panel

hexadecimal display as long as F1 is pressed. The subfailure codes are listed
below, followed by the actions that need to be taken to correct the problem.

After performing a procedure for a subfailure code, always repeat all the tests
to see if that procedure solved the problem. If the problem still exists, perform

the next procedure.

SUBFAILURE CODE 01
1.

Replace the ISI PCA as described in Chapter 4.

Verify that all card rack backplane cables are properly installed and seated

at both ends.
3.

Replace the ESG PCA as described in Chapter 4.

SUBFAILURE CODE 02
1.

Replace the ESG PCA as described in Chapter 4.

Verify that all card rack backplane cables are properly installed and seated

at both ends.

Replace the ISI PCA as described in Chapter 4.

3.7.13 SAM Failure Code CO
When SAM failure code CO is displayed, there is an accompanying subfailure

code. The subfailure code determines what corrective actions have to be taken.
There are 19 different subfailure codes for SAM failure code C0O. They are

listed in Table 3-5.

3-66

RV20 Drive Off-Line Testing

To find the subfailure code, gain access to the maintenance panel on the front
of the drive and press F1. The subfailure code appears on the operator panel
hexadecimal display while F1 is pressed. Each of the subfailure codes is listed
in Table 3-5 with the actions that need to be taken to correct the problem.
After you perform a procedure in Table 3-5, always repeat all the tests to see if
that procedure solved the problem. If the problem still exists, go on to the next
procedure for that failure code in Table 3-5.

3.7.14 SAM Failure Code C1
When SAM failure code C1 is displayed, there is an accompanying subfailure

code. The subfailure code determines what corrective actions have to be taken.
There are 3 subfailure codes for SAM failure code C1: 01, 02, and 03.

After performing a procedure for a subfailure code, always repeat all the tests
to see if that procedure solved the problem. If the problem still exists, perform
the next procedure.

SUBFAILURE CODE 01

1.
2.

Replace the S/DC PCA as described in Chapter 4.
Replace the ISI PCA as described in Chapter 4.

Verify that all card rack backplane cables are properly installed and seated
at both ends.

SUBFAILURE CODE 02

If your RV20 is equipped with a spindle brake, replace the spindle brake
assembly.

Verify that all card rack backplane cables are properly installed and seated

at both ends.

Replace the baseplate terminator PCA as described in Chapter 4.
Replace the S/DC PCA as described in Chapter 4.

RV20 Drive Off-Line Testing

3-67

S Ov s o=

SUBFAILURE CODE 03
Replace the ESG PCA as described in Chapter 4.
Replace the Servo Systems PCA as described in Chapter 4.

Replace the R/WC PCA as described in Chapter 4.
Replace
the MDS PCA as described in Chapter 4.

Replace the S/DC PCA as described in Chapter 4.
Verify that all card rack backplane cables are properly installed and seated

at both ends.

3.7.15 SAM Failure Code C2
When SAM failure code C2 is displayed, there is an accompanying subfailure

code. The subfailure code determines what corrective actions have to be taken.
There are 32 subfailure codes for SAM failure code C1. They are as follows.
01, 02, 03, 04, 05, 06, 07, 0A, 0B, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 2A,
2B, 2C, 2D, B1, B2, B3, B4, B5, B6, B9, BA, BC

followed by the actions that need to be taken to correct the problem.

After performing a procedure for a subfailure code, always repeat all the tests

to see if that procedure solved the problem. If the problem still exists, perform
the next procedure.

SUBFAILURE CODES 01, 02, 04, 05, 06, and 0B
1.

Replace the S/DC PCA as described in Chapter 4.

Replace the ISI PCA as described in Chapter 4.

Verify that all card rack backplane cables are properly installed and seated
at both ends.

S ov ik o=

SUBFAILURE CODES 03, 07, and 0A

Replace the ESG PCA as described in Chapter 4.
Replace the Servo Systems PCA as described in Chapter 4.
Replace the R/WC PCA as described in Chapter 4.

Replace the MDS PCA as described in Chapter 4.
Replace the S/DC PCA as described in Chapter 4.
Verify that all card rack backplane cables are properly installed and seated

at both ends.

3-68

RVZ20 Drive Off-Line Testing

SUBFAILURE CODE 06

1.
2.

|
Replace the S/DC PCA as described in Chapter 4.
Verify that all card rack backplane cables are properly installed and seated

S Ok

at both ends.

Replace the ESG PCA as described in Chapter 4.
Replace the Servo Systems PCA as described in Chapter 4.
Replace the R/WC PCA as described in Chapter 4.
Replace the card rack backplane as described in Chapter 4.

SUBFAILURE CODES 20 — 2D

These subfailure codes correspond to the subfailure codes for SAM failure code
CO that are listed in Table 3-5. Refer to Table 3-5 for the proper corrective
actions for these subfailure codes.

For example, the corrective action for SAM code C2, subfailure code 23, is the
same as for SAM code C0, subfailure code 23.

SUBFAILURE CODES B1, B2, B3, B4, B5, B6, B9, and BC

These subfailure codes correspond to the subfailure codes for SAM failure code
7E that are listed in Table 3-4. Refer to Table 3-4 for the proper corrective

actions for these subfailure codes.

For example, the corrective action for SAM code C2, subfailure code B3, is the
same as for SAM code 7E, subfailure code B3.

3.7.16 SAM Failure Code C3
When SAM failure code C3 is displayed, there is an accompanying subfailure
code. The subfailure code determines what corrective actions have to be taken.
There are 36 subfailure codes for SAM failure code C3. They are as follows.

01, 02, 03, 04, 05, 06, 07, 08, 09, 0A, 0B, 0C, 0D, 20, 21, 22, 23, 24, 25, 26, |
27, 28, 29, 2A, 2B, 2C, 2D, B1, B2, B3, B4, B5, B6, B9, BA, BC

followed by the actions that need to be taken to correct the problem.

After performing a procedure for a subfailure code, always repeat all the tests
to see if that procedure solved the problem. If the problem still exists, perform
the next procedure.

RV20 Drive Off-Line Testing

3-69

SUBFAILURE CODES 01, 03, and 0B

Replace the S/DC PCA as described in Chapter 4.

Replace the ISI PCA as described in Chapter 4.

Verify that all card rack backplane cables are properly installed and seated

at both ends.
Replace the card rack backplane.

SUBFAILURE CODES 02, 08, and 0A
S ok W

Replace the ESG PCA as described in Chapter 4.
Replace the Servo Systems PCA as described in Chapter 4.

Replace the R/WC PCA as described in Chapter 4.

Replace the MDS PCA as described in Chapter 4.
Replace the S/DC PCA as described in Chapter 4.

Verify that all card rack backplane cables are properly installed and seated
at both ends.

Replace the card rack backplane.

SUBFAILURE CODES 04, 05, 07, and 09
1.

Replace the S/DC PCA as described in Chapter 4.

Verify that all card rack backplane cables are properly installed and seated
at both ends.

Replace the ESG PCA as described in Chapter 4.

Replace the R/WC PCA as described in Chapter 4.

Replace the card rack backplane.

SUBFAILURE CODE 06
1.

Replace the MDS PCA as described in Chapter 4.

Replace the R/WC PCA as described in Chapter 4.

Replace the S/DC PCA as described in Chapter 4.

Verify that all card rack backplane cables are properly installed and seated

~at both ends.
5.

Replace the card rack backplane.

SUBFAILURE CODE 0C
1.

Replace the power supply as déscribed in Chapter 4.

Replace the S/DC PCA as described in Chapter 4.

3-70

RV20 Drive Off-Line Testing

SUBFAILURE CODE 0D

1.
2.
3.

Verify that the fan is operating. If it is not, replace the fan assembly as
described in Chapter 4. If the fan is operating, go on to step 2.
Replace the ESG PCA as described in Chapter 4.
Replace the S/DC PCA as described in Chapter 4.

SUBFAILURE CODES 20 — 2D

These subfailure codes correspond to the subfailure codes for SAM failure code
CO that are listed in Table 3-5. Refer to Table 3-5 for the proper corrective
actions for these subfailure codes.

For example, the corrective action for SAM code C3, subfailure code 23, is the
same as for SAM code CO, subfailure code 23.

SUBFAILURE CODES Bl1, B2, B3, B4, B5, B6, B9, and BC

These subfailure codes correspond to the subfailure codes for SAM failure code
7E that are listed in Table 3-4. Refer to Table 3-4 for the proper corrective
actions for these subfailure codes.

For example, the corrective action for SAM code C3, subfailure code B3, is the
same as for SAM code 7E, subfailure code B3.

3.7.17 SAM Failure Code C4
When SAM failure code C4 is displayed, there is an accompanying subfailure
code. The subfailure code determines what corrective actions have to be taken.
There are 33 subfailure codes for SAM failure code C4. They are as follows.

01, 02, 03, 04, 05. 06, 07, 08, 0A, 0B, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
2A, 2B, 2C, 2D, B1, B2, B3, B4, B5, B6, B9, BA, BC

To find the subfailure code, gain access to the maintenance panel on the front
of the drive and press F1. The subfailure code appears on the operator panel
hexadecimal display while F1 is pressed. The subfailure codes are listed below,
followed by the actions that need to be taken to correct the problem.
After performing a procedure for a subfailure code, always repeat all the tests
to see if that procedure solved the problem. If the problem still exists, perform
the next procedure.

RV20 Drive Off-Line Testing

3-71

SUBFAILURE CODES 01, 02, 04, and 0B
1.

Replace the S/DC PCA as described in Chapter 4.

Replace the ISI PCA as described in Chapter 4.

Verify that all card rack backplane cables are properly installed and seated
at both ends.

S O Lo

SUBFAILURE CODES 03, 07, 08, and 0A

Replace the ESG PCA as described in Chapter 4.
Replace the Servo Systems PCA as described in Chapter 4.

Replace the R/WC PCA as described in Chapter 4.
Replace the MDS PCA as described in Chapter 4.

Replace the S/DC PCA as described in Chapter 4.
Verify that all card rack backplane cables are properly installed and seated

at both ends.

Replace the card rack backplane as described in Chapter 4.

SUBFAILURE CODES 05, and 06
1.

Replace the S/DC PCA as described in Chapter 4.

Verify that all card rack backplane cables are properly installed and seated

at both ends.

Replace the ESG PCA as described in Chapter 4.

Replace the R/WC PCA as described in Chapter 4.

Replace the card rack backplane as described in Chapter 4.

SUBFAILURE CODES 20 — 2D
These subfailure codes correspond to the subfailure codes for SAM failure code

CO that are listed in Table 3-5. Refer to Table 3-5 for the proper corrective
actions for these subfailure codes.
For example, the corrective action for SAM code C4, subfailure code 23, is the

same as for SAM code CO, subfailure code 23.
SUBFAILURE CODES B1, B2, B3, B4, B5, B6, B9, BA, and BC
These subfailure codes correspond to the subfailure codes for SAM failure code

7E that are listed in Table 3-4. Refer to Table 3-4 for the proper corrective

actions for these subfailure codes.

For example, the corrective action for SAM code C4, subfailure code B3, is the

same as for SAM code 7E, subfailure code B3.

3-72

RVZ20 Drive Off-Line Testing

Chapter 4

Removal and Replacement

4.1 General
This chapter gives removal and replacement procedures for all major assemblies
in the RV20 drive. Paragraph 4.2 contains information about the organization
of this chapter. The rest of the chapter deals W1th the removal and replacement
procedures.

4.2 Chapter Organlzatlon
The removal and replacement procedures are set up as follows.

Paragraph 4.3 contains external parts removal and replacement information.
The following external parts are included.

Topcover

Filter grill and filter

Maintenance panel

Front bezel

° Operator panel

Paragraphs 4.4 and 4.5 both contain internal parts removal and replacement
information. Paragraph 4.4 covers the following internal rear parts.
e

Power supply

(Card rack

(Card rack backplane

Printed circuit assemblies

Remouval and Replacement

4-1

Paragraph 4.5 contains internal front parts removal and replacement informa-

tion. Many of the procedures involve removal of other assemblies as well. The
following internal front parts are covered.

Fan assembly

Baseplate*

Spindle assembly

Spindle pulley belt

Spindle grounding brush

Spindle motor/cable assembly

Spindle brake

Baseplate terminator PCA

Carriage assembly

e Tachometer sensor

Guardband sensor

Interlock solenoid

Carriage lock solenoid

4.3 Removal and Replacement — External Parts
This paragraph gives removal and replacement procedures for the external

assemblies.

4.3.1 Filter Grill and Filter Removal and Replacement
To remove the filter grill/filter assembly, proceed as follows.
1.

Make sure all power is removed from the system (CB1 on the rear
panel is in the OFF position).

On the right side of the front panel, push the grill latch to the right
so the grill comes out about one-half inch (Figure 4-1).
Unlatch the filter grill, swinging it out to the left, and remove it
(Figure 4-1).

The filter lies inside the filter grill. Replace it if necessary.

* The baseplate is not a field replaceable item. Many of the internal front parts

require removal of the baseplate, however, so the baseplate removal and replacement is included in Paragraph 4.5.

4-2

Removal and Replacement

/ /

Figure 4-1 Filter Grill Removal

[

SHR-0312-87

To replace the filter grill/filter assembly proceed as follows.
1.

Place the filter inside the filter grill so it lies flat.

On the left side of the front panel, insert the filter grill. Secure the
grill on the right side by snapping it into place (Figure 4-1). The grill
only goes in one way; it should snap in easily. If you are not sure if
the grill is in properly, power up the drive and check to make sure
the cartridge door can open and close without obstruction from the
grill.

Removal and Replacement

4-3

- 4.3.2 Front Bezel Removal and Replacement
To remove the front bezel, proceed as follows.

Make sure all power is removed from the system (CB1 is in the OFF
position),

Remove the filter grill as described in Paragraph 4.3.1.
|

WARNING

Make sure that the H9643 stabilizer leg is extended before pulling the RV20 out from the cabinet. Failure to extend the stabi-

lizer leg will cause the H9643 cabinet to tip forward when the
RV20 is pulled out. Never extend more than one RV20 drive at

a time.

Release the ESD bracket at the rear of the drive. Then pull the
RV20 out from the H9643 cabinet. Now remove the three securing

screws on the top of the bezel (Figure 4-2).
4.

Remove the two screws holding the grill latches to the RV20 frame
(Figure 4-2).

Slip the bezel off the RV20 frame.

Figure 4-2 Front Bezel Removal

SECURING
SCREWS

=
GRILL

LATCH

4-4

Oom
DOOR

RELEASE

Removal and Replacement

GRILL

LATCH

SHR-0317-87

To replace the front bezel, proceed as follows.

Slip the bezel onto the front of the RV20. Line up the screw holes on

the top of the bezel.

Replace the two grill latches just below the cartridge door (Figure |
Replace the three securing screws on the top of the bezel (Figure
|
|
4-2).
Install the filter grill on the front of the drive..

4.3.3 Top Cover Removal and Replacement

The top cover is made up of two pieces that fit together. To remove the top
cover, proceed as follows.

WARNING

Make sure that the H9643 stabilizer leg is extended before pulling the RV20 out from the cabinet. Failure to extend the stabilizer leg will cause the H9643 cabinet to tip forward when the
RV20 is pulled out. Never extend more than one RV20 drive at
.

a time.

Remove the two screws securing the rear piece of the top cover to
the frame of the RV20.

Lift the back piece of the top cover up and off the frame.

To remove the front piece of the top cover, you must remove the
front bezel as described in Paragraph 4.3.2.

Working from the front, slide the front piece of the top cover back,
and lift it up and out.

To replace the top cover, proceed as follows.
1.

Replace the front piece of the top cover first. Insert it so that it
catches on the side rails and slide it forward into place.
Replace the front bezel as described in Paragraph 4.3.2.

Replace the rear piece of the top cover. First, mate it with the front
piece. Lay the rear piece down so that the allen screw holes in the
rear line up.

Secure the rear cover with two screws.

Removal and Replacement

4-5

4.3.4 Operator Panel Removal and Replacement
To remove the operator panel, proceed as follows.

CAUTION
Use a static discharge kit with a grounded wrist strap whenever accessing the internal parts of the RV20.

Make sure all power is removed from the system (CB1 is in the OFF

position).
2.

Remove the top cover and front bezel as described in Paragraph
4.3.3.

Remove the two operator panel holding screws and the operator
panel.

Disconnect P30 from the operator panel. Make note of the cable

orientation.
To replace the operator panel, proceed as follows.

Connect P30 to the operator panel. Be careful to positibn the cable
correctly. When looking at the cable from the front, the red stripe
should be to the right.

Place the operator panel into the front chassis and secure it with two
SCrews.

Replace‘ the top cover and front bezel as described in Paragraph
4.3.3.

4-6

Removal and Replacement

4.3.5 Maintenance Panel Removal and Replacement
To remove the maintenance panel, proceed as follows.
CAUTION

Use a static discharge kit with a grounded wrist strap whenever accessing the internal parts of the RV20.

Make sure all power is removed from the system (CB1 is in the OFF
position and the power cord is removed from its power outlet).

Remove the top cover and front bezel as described in Paragraph
4.3.3.

Remove the two maintenance panel holding screws and the maintenance panel.

Disconnect P40 from the maintenance panel. Make note of the cable
orientation.

To replace the maintenance panel, proceed as follows.
1.

Connect P40 to the maintenance panel. Be careful to position the cable correctly. When looking at the cable from the front, the red stripe
should be closest to the top of the drive.

Place the maintenance panel into the front chassis and secure it with
two screws.

Replace the top cover and front bezel as described in Paragraph
4.3.3.

Removal and Replacement

4-7

4.4 Removal and Replacement — Internal Rear Parts
This paragraph gives removal and replacement procedures for the internal rear
parts. These parts are shown in Figure 4-3.

4.4.1 Power Supply Removal and Replacement
To remove the power supply, proceed as follows.
CAUTION
Use a static discharge kit with a grounded wrist strap whenever accessing the internal parts of the RV20.
WARNING
Hazardous voltages are present in the power supply. The capacitors in the power supply must have time to discharge before any work is attempted. The RV20 must be powered down
for at least five full minutes before these removal procedures

are attempted.

Figure 4-3 RV20 Internal Parts Locations

CARD RACK
ASSEMBLY

PRINTED CIRCUIT
/—ASSEMBLIES ,

INTERMEDIATE
CROSS MEMBER
STIFFENER

BASEPLATE
ASSEMBLY

4-8

Remouval and Replacement

Make sure all power is removed from the system (CB1 is in the OFF
position). Remove the power cord from ac input connector J20 on the
rear of the RV20 (see Figure 4-4).
|

Remove the top cover as described in Paragraph 4.3.3. Remember to
extend the H9643 cabinet stabilizer leg before attempting to slide the
RV20 out.

Disconnect P14, P15, and P16 on the side of the power supply. P14
and P15 are identical, so make sure you know which one is which
when you replace the power supply. Note the orientation of P16. P16
is not keyed. It is very important that P16 is replaced properly.

Remove the four power supply mounting screws and hardware from
the top of the power supply (Figure 4-4).

Figure 4-4 Power Supply Removal
MOUNTING
SCREWS

MOUNTING

SCREWS

CIRCUIT
gngKER

ATl

AC INPUT

AC POWER

cABLE

CONNECTOR

J20

|
SHR-0318-87

Removal and Replacement

4-9

Remove the remaining two screws that secure the cross-member stiffener (Figure 4-3), and remove the stiffener. Make note of the stiffener orientation,

Grasp the power supply on both ends. You may have to shift the
entire supply slightly toward the front of the drive to get a good hold
on it. When you have a good hold on the power supply, lift it straight
up out of the drive.
To replace the power supply, proceed as follows.
1.

Place the power supply in position inside the RV20. Line up the
mounting holes in the power supply with the mounting holes on the

chassis.

Put the cross-member stiffener in place. Make sure the cable to J15
is positioned correctly inside the stiffener.
Secure the power supply to the chassis with the mounting hardware
and four screws. Remember to secure the ground strap.
Secure the cross-member stiffener to the cross member with two

SCIrews.
5.

Connect P14 and P15 to the power supply.

Orient P16 properly and install it in the power supply.

Replace the top cover as described in Paragraph 4.3.3.

4.4.2 PCA Removal and Replacement
The procedure is the same for removal and replacement of all printed circuit
assemblies in the card cage. Figure 4-5 shows the position of each PCA in the
backplane. There are eight slots in the card rack. The top slot is for the RV20

drive subsystem controller PCA. This PCAis in RV20 master drives only. The
top slotis unused in RV20 slave drives. The remaining seven slots contain the
following seven PCAs (in top-to-bottom order).

Error correction and common memory interface (ECC) PCA

ISI PCA

Servo/drive control (S/DC) PCA
Modulator demodulator synchronizer (MDS) PCA

Read/write control (R/WC) PCA
Error signal generator (ESG) PCA

Servo systems PCA

4-10

Remouval and Replacement

Figure 4-5 Card Rack Slot Assignments
DRIVE
SUBSYSTEM

CONTROLLER
(RV20 MASTER
ONLY)

ECC PCA

:_"_'_':h----———-------q‘_‘::fi'1

/ ISI PCA

‘I///— S/DC PCA
'

—— MDS PCA

_‘l\- R/WC PCA
——————

ge—

N ESG
-

PCA

SERVO
SYSTEMS
PCA
SHR-0320-87

To remove a PCA from the card rack, proceed as follows.
CAUTION

Use a static discharge kit with a grounded wrist strap when-

ever accessing the internal parts of the RV20.

Make sure all power is removed from the system (CB1 is in the OFF
position).

Remove the top cover as described in Paragraph 4.3.3. Remember to

extend the H9643 cabinet stabilizer leg before attempting to slide the
RV20 out.

Removal and Replacement

4-11

Lift the card rack up from the chassis and place it in the service

position shown in Figure 4-6.
Figure 4-6 Card Rack Service and Removal
FWD

CARD RACK REMOVAL POSITION
SHR-0321-87

4-12

Removal and Replacement

Remove the PCA mounting brackets on both sides of the card rack
(Figure 4-7).

Release the injector tabs on either side of the desired module by pull- |
ing up (use Figure 4-3 as a guide, if necessary).

Carefully slide the module out of the card rack and place on a nonconductive surface.

To replace a PCA in the card rack, proceed as follows.
1.

Slide the module into its slot along the card guides on either side of
the card rack.

Engage the injector tabs on either side of the module by pushing
down.

Replace the PCA mounting brackets on both sides of the card rack
(Figure 4-7) and secure with four screws.

Seat the card rack back into its closed position. To accomplish this,
lift the card rack up slightly from its service position, straighten it
out, and slide the rack down so it is flush with the chassis (Figure

4-6).
5.

Replace the top cover as described in Paragraph 4.3.3.

CARD RACK ASSEMBLY

g L£

Figure 4-7 PCA Mounting Brackets

SHR-0322-87

Removal and Replacement

4-13

4.4.3. Card Rack Removal and Replacement
To remove the card rack, proceed as follows.

CAUTION

Use a static discharge kit with a grounded wrist strap when~ever accessing the internal parts of the RV20.

Make sure all power is removed from the system (CB1 is in the OFF‘
position).

Remove the top cover as described in Paragraph 4.3.3. Remember to
extend the H9643 cabinet stabilizer leg before attempting to slide the
|
|
RV20 out.

Lift the card rack up from the chassis and place it in the service
position shown in Figure 4-6.

Remove the PCA mounting brackets on both sides of the card rack

(Figure 4-7).

Remove each module, one at a time, by releasing the injector tabs on

‘either side of the modules (use Figure 4-3, if necessary). Slide each
module out of the card rack and place on a non-conductive surface.
6.

Disconnect all connectors at the rear of the card rack and make note

of their orientation and location (Figure 4-8). All connectors on the
modules have a J designation, and all connectors going into the mod-

ules have a P designation.
7.

Carefully place the card rack into its removal position (Figure 4-6),
and lift it out of the chassis.

Place the card rack on a non-conductive surface.

To replace the card rack, proceed as follows.
1.

Slide the card rack into the chassis vertically, and place the rack in
its service position (45 degree angle, see Figure 4-6).

Connect all module connectors at the rear of the card rack.

Replace all modules into their proper positions in the card rack.

Replace the PCA mounting brackets on both sides of the card rack

and secure with four screws.

4-14

Removal and Replacement

Figure 4-8 Card Rack Backplane
P60 TO

CARD RACK

J60

MOUNTING

SCREWS

)
CHASSIS

J12

POWER
SUPPLY

s
J13

TO
TERMINATOR
POWER

MOUNTING
SCREW

MOUNTING

TO
170 PORT

SCREWS
~

HARDWIRED

TO CARRIAGE\

——— CARRIAGE

BOARD

33333333333

Replace the top cover as described in Paragraph 4.3.3.

4.4.4 Card Rack Backplane Removal and Replacement
To remove the card rack backplane, proceed as follows.

Follow the instructions for removing the card rack in Paragraph
4.4.3.

Remove the six screws that secure the card rack backplane to the

card rack frame (Figure 4-8).
3.

Slide the backplane out of the card rack.

To replace the card rack backplane, proceed as follows.
1.

Slide the new card rack backplane into the card rack frame and se-

cure with six screws (Figure 4-8).
2.

Replace the card rack as described in Paragraph 4.4.3.

Removal and Replacement

4-15

4.5 Removal and Replacement — Internal Front Parts
This paragraph gives removal and replacement procedures for the internal parts
that are housed under the front half of the top cover. Most of these parts are

attached to the baseplate assembly, so the majority of these procedures require
you to remove the baseplate assembly from the RV20 frame.
The removal and replacement procedures for the spindle pulley belt, the baseplate terminator PCA, and the fan assembly are the only ones that do not re-

quire removal of the baseplate assembly.
Figure 4-3 shows the baseplate assembly in the frame. Figure 4-9 shows the

baseplate removed from the RV20 frame. Figure 4-9 provides two views of the
baseplate assembly. Familiarize yourself with the illustration. Some procedures

in this section require you to work from the bottom of the baseplate. This is
the second view, Figure 4-9 (2 of 2). The illustration will be referred to through-

out this paragraph.
Figure 4-9 RV20 Baseplate Parts Locations (1 of 2)
CARRIAGE

CARTRIDGE
DOOR
ACTUATOR

POSITIONER

CARRIAGE

MOTOR
MAGNET

RAIL

BASEPLATE
TERMINATOR

PCA

CARTRIDGE
:
DOOR
ACTUATOR

DATA

CARTRIDGE
FLAG
CARTRIDGE

DOOR

SPINDLE
MOTOR/BRAKE
ASSEMBLY

SPINDLE

MOTOR

SPINDLE
PULLEY

SPINDLE
ASSEMBLY

BELT

TACHOMETER
SENSOR

4-16

Remouval and Replacement

Figure 4-9 RV20 Baseplate Parts Locations (2 of 2)
SPINDLE GROUNDING
BRUSH AND
BALL BEARING

SPINDLE
ASSEMBLY

INTERLOCK
SOLENOID

POSITIONER
MOTOR
MAGNET

CARTRIDGE
DOOR

CARRIAGE
LOCK
SOLENOID

Figures 4-10 and 4-11 show wiring paths through the RV20. These illustrations
will also be referred to throughout this paragraph.

Removal and Replacement

4-17

F igure 4-10 RV20 W iring
POWER SUPPLY
VOLTAGE
HARNESS

TOJ12

TOJ14

TOJ11

TO J22

R
Y
e
@
/
/
/
A
n
r
: 13 23

I&now EzZaso2Q0 -——o—o TE<wm&oo zZ2OLo 3w-S_n o@ -c————

POWER SUPPLY
SIGNAL CABLE

-Q

A as

MAINTENANCE
PANEL CABLE
TO J39

53e

CABLE OPERATOR
PANEL
TO J38

£)

CABLE OPERATOR

4-18

Removal
and Replacement

Figure 4-11 Baseplate Wiring

OID=.<NT2. o\! o

CABLE
GROUND
m< 197 i
T

WHITE

)

\ EWN Z

AN 552 &
’

o2 3

CABLE ASSEMBLY
INTERNAL POWER

o >w

fas) — < Q p4

w 2

pV4

(0
=
2

IS ROUTED UNDER
THE BASEPLATE

Removal and Replacement

SHR-0328-87

4-19

4.5.1 Fan Assembly Removal and Replacement
The fan assembly is shown in Figure 4-3. To remove the fan assembly, proceed
|
as follows,

CAUTION

Use a static discharge kit with a grounded wrist strap whenever accessing the internal parts of the RV20.

Make sure all power is removed from the system (CB1 is in the OFF

position).
2.

Remove the top cover and front bezel as described in Paragraph
4.3.3. Remember to extend the H9643 cabinet stabilizer leg before

pulling the RV20 out.

Remove the four screws that secure the cross-member stiffener to the
intermediate cross member (Figure 4-3). Remove the stiffener.

Disconnect the fan power plug on the top of the fan assembly (Figure
4-10).

The fan assembly sits inside the intermediate cross member. The
power plug is its only anchor. Lift the fan assembly up and out of the

intermediate cross member.
To replace the fan assembly, proceed as follows.

Seat the fan assembly inside the intermediate cross member with the
fan grill facing toward the front of the RV20.

2.
3.

Connect the fan power plug.
Replace the cross-member stiffener on the intermediate cross member. Seat the cable assembly properly on the stiffener and secure
with four screws.

Replace the top cover and front bezel as described in Paragraph
4.3.3.

4-20

Removal and Replacement

4.5.2 Baseplate Removal and Replacement
The baseplate assembly is shown in Figure 4-3. To remove the baseplate assembly, proceed as follows.
|
CAUTION

Use a static discharge kit with a grounded wrist strap whenever accessing the internal parts of the RV20.

Make sure all power is removed from the system (CB1 is in the OFF
position).

Access the internal parts of the RV20 by removing the front bezel

and the top cover as described in Paragraph 4.3.3. Remember to extend the H9643 cabinet stabilizer leg before pulling the RV20 out.

3.
4,

Remove the four screws that secure the cross-member stiffener to thev

cross member (Figure 4-3). Remove the stiffener.

Remove the ground strap next to the rear of the carriage rail (Figure
4-11).

CAUTION

Do not allow the ground strap to touch the carriage assembly
or the carriage PCA. Doing so could seriously damage the carriage assembly.

Disconnect P15 at the power supply to free the cable harness that

sits on the cross member. Lay the cables on the baseplate. Make
sure the cables are not touching the carriage assembly.

Figure 4-10 shows the cable routing paths. Notice that on the left
side of the frame, there is a harness hold down attached to the
frame. Use a screwdriver to pry open the hold down. Remove the
cable.

Disconnect the fan power plug.

Place the card rack assembly in the service position shown in Figure
4-6.

Remove P34 and P33 from the card rack backplane to access carriage connector P11 on the card rack backplane (use Figure 4-8. if
necessary).

Removal and Replacement

4-21

10.

Using extreme care, disconnect carriage connector P11 from the card
rack backplane.

11.

Remove the front cross member (Figure 4-3) by removing the three
screws securing it to the frame. Lift the front cross member straight
up and out from the frame.

12.

Disconnect P21 on the rear of the baseplate terminator PCA (Figure

4-11).
13.

Locate the four screws that secure the baseplate to the RV20 frame.
These screws sit on blue rubber shock mounts. Remove these four
SCrews.

14.

Make sure the cartridge door is closed.

CAUTION
If there is resistance when lifting the baseplate, set it back
down and make sure all wires and plugs have been
disconnected.
15.

Grasp the baseplate assembly at the front and rear and very carefully
lift it up out of the chassis. Place the baseplate assembly on a nonconductive surface.

To replace the baseplate assembly, proceed as follows.
1.

Make sure that all wires, cables, and connectors inside the chassis

are out of the way. Grasp the baseplate assembly at the front and
rear. Using the four screw holes as a guide, carefully place the baseplate into the frame.

Install the four screws to secure the baseplate to the chassis.

4-22

Remouval and Replacement

Slide the manual door release to the side and make sure the car-

tridge door assembly is in the open position.

Connect P21 at the rear of the baseplate terminator PCA (Figure
4-9).

Connect the ground strap to the screw just to the left of the carriage
rail.

CAUTION

Do not allow the ground strap to touch the carriage assembly
or the carriage PCA. Doing so could seriously damage the carriage assembly.

Install the front cross member with three screws.

Connect carriage connector P11 to the card rack backplane.

Connect P34 and P33 to the card rack backplane (use Figure 4-8, if
necessary).

Seat the card rack back into its closed position (Figure 4-6).
10.
11.

Connect the fan power plug.

Install the cable harness into the hold down on the left side of the

frame (Figure 4-10).
12,

Replace the intermediate cross-member stiffener on the cross member. Seat the cable assembly on the stiffener. Connect P15 to the
power supply.

13.

Secure the cross-member stiffener to the cross member with four
SCrews.

14.

Replace the front bezel and top cover as described in Paragraph
4.3.3.

Removal and Replacement

4-23

4.5.3 Spindle Pulley Belt Removal and Replacement

To remove the spindle pulley belt, proceed as follows.
CAUTION
Use a static discharge kit with a grounded wrist strap whenever accessing the internal parts of the RV20.

Make sure all power is removed from the system (CB1 is in the OFF

position).
2.

Remove the top cover and front bezel as described in Paragraph
4.3.3. Remember to extend the H9643 cabinet stabilizer leg before

pulling the RV20 out.

Remove the two screws that secure the spindle motor cover (Figure
4-12). Remove the motor cover.

Use extreme care while removing the pulley belt. The belt must be
replaced exactly as it sits on the spindle. Be careful not to twist the

belt.

Remove the belt by rotating the spindle while sliding the belt

off.

To replace the spindle pulley belt, proceed as follows.
1.

Rotate the spindle while slipping the pulley belt over the spindle and

pulley. Make sure that the belt is oriented properly.
WARNING

Failure to orient the belt properly will cause a fault upon

power-up.
2.

‘

Rotate the spindle to make sure that the belt is oriented properly.
There should be very minimal resistance to the rotation.

3.
4.

Replace the motor cover and secure with two screws.
Replace the top cover and front bezel as described in Paragraph
4.3.3.

4-24

Removal and Replacement

Figure 4-12 Spindle Parts

SPINDLE
BRAKE
ASSEMBLY

DRIVE

MOTOR
PULLEY

CARRIAGE
LOCK
SPRING
DETENT
SHR-0329-87

Removal and Replacement

4-25

4.5.4 Spindle Grounding Brush Removal and Replacement
To remove the spindle grounding brush, proceed as follows.
CAUTION

Use a static discharge kit with a grounded wrist strap whenever accessing the internal parts of the RV20.

Remove the baseplate as described in Paragraph 4.5.2.

The grounding brush holds down a ball bearing on the bottom of the

spindle (if necessary, use Figure 4-16 to locate the grounding brush

and ball bearing). Working from the bottom, remove the screw that
holds the spindle grounding brush.

’-,Ca’refully remove the spindle grounding brush and the ball bearing
from the center of the spindle.

To replace the spindle grounding brush, proceed as follows.
1.

Replace the ball bearing in the center of the retainer hole in the

spindle.
2.

Position the center section of the brush on the ball bearing in the

center of the spindle.

Replace the holding screw on the outside edge of the grounding
brush.

Replace the baseplate as described in Paragraph 4.5.2.

4.5.5 Spindle Assembly Removal
and Replacement
To remove the spindle, proceed as follows.

CAUTION
Use a static discharge kit with a grounded wrist strap whenever accessing the internal parts of the RV20.

4-26

Remove the baseplate as described in Paragraph 4.5.2.

Removal and Replacement

Remove the spindle pulley belt. Proceed as follows.
a.

Remove the two screws that secure the spindle motor cover

Use extreme care while removing the pulley belt. The belt must
be replaced exactly as it sits on the spindle. Be careful not to
twist the belt. Remove the belt by rotating the spindle while slid-

(Figure 4-12). Remove the motor cover.

ing the belt off.

Working from the bottom of the baseplate, remove the three screws

Lift the spindle out of the baseplate.

Remove the spindle grounding brush. Proceed as follows.

from the bottom of the spindle (Figure 4-12).

a. Remove the screw that holds the spindle grounding brush (use
Figure 4-16, if necessary).

Carefully remove the spindle grounding brush and the ball bear-

ing from the center of the spindle.

To replace the spindle, proceed as follows.

Replace the spindle grounding brush and ball bearing at the bottom

of the spindle. Proceed as follows.

Replace the ball bearing in the center of the retainer hole in the
spindle,

Position the center section of the brush on the ball bearing in

the center of the spindle.

Replace the holding screw on the outside edge of the grounding
brush.

Seat the spindle in the baseplate and secure it with three screws. Be
careful to turn the screws in evenly to ensure proper seating of the
spindle.

Removal and Replacement

4-27

Install the spindle pulley belt. Proceed as follows.
a.

Rotate the spindle while slipping the pulley belt over the spindle
and pulley. Make sure that the belt is oriented properly.

WARNING
Failure to orient the belt properly will cause a fault upon
power-up.

Rotate the spindle to make sure that the belt is oriented prop-

erly. There should be very minimal resistance to the rotation.
c.

Replace the motor cover and secure with two screws.

Replace the baseplate as described in Paragraph 4.5.2.

4.5.6 Spindle Motor/Cable Assembly Removal and
Replacement
To remove the spindle motor/cable assembly, proceed as follows.
CAUTION
Use a static discharge kit with a grounded wrist strap whenever accessing the internal parts of the RV20.

Remove the baseplate as described in Paragraph 4.5.2.

Remove the spindle pulley belt. Proceed as follows.

Remove the two screws that secure the spindle motor cover

(Figure 4-12). Remove the motor cover.

Use extreme care while removing the pulley belt. The belt must
be replaced exactly as it sits on the spindle. Be careful not to
twist the belt. Remove the belt by rotating the spindle while sliding the belt off.

Working from the bottom of the baseplate, follow the wiring from the

spindle motor to the baseplate terminator PCA (Figure 4-11).
Disconnect the connector on the baseplate terminator PCA.

4-28

Removal and Replacement

Remove any cables and tie wraps from the spindle motor to the spindle brake (if so equipped) and to the baseplate terminator PCA
(Figure 4-11).

Remove the four mounting screws securing the spindle motor.

Locate and inspect the drive motor pulley (Figure 4-12). Note the orientation of the set screw and standoff for pulley replacement.
Remove the spindle pulley. Loosen the set screw enough to remove
the pulley from the motor shaft. Do not remove the set screw.

Remove the spindle motor (Figure 4-12).

To replace the spindle motor/cable assembly. proceed as follows.

Return the pulley to the motor shaft and secure by tightening the set
screw. Make sure that the pulley is positioned away from the base to
allow enough clearance for the pulley to move freely.

Mount the spindle motor on the baseplate with four screws.

Reroute the cables from the motor to the spindle brake (if so
equipped) and to the baseplate terminator PCA. Secure the cables
with a tie wrap, if necessary.

Connect the connector to the baseplate terminator PCA and the spindle brake (if so equipped).

Replace the spindle pulley belt. Proceed as follows.

Rotate the spindle while slipping the pulley belt over the spindle
and pulley. Make sure that the belt is oriented properly.

WARNING

Failure to orient the belt properly will cause a fault upon
power-up.

Rotate the spindle to make sure that the belt is oriented properly. There should be very minimal resistance to the rotation.

Replace the motor cover and secure with two screws.

Replace the baseplate as described Paragraph 4.5.2.

Removal and Replacement

4-29

4.5.7 Spindle Brake Removal and Replacement

Not all drives are equipped with a spindle brake. If your drive is so equipped,
the brake is located just behind the spindle (Figure 4-9). It is mounted on the

baseplate with two screws. The wiring is shown in Figure 4-11.
To remove the spindle brake, proceed as follows.
CAUTION
Use a static discharge kit with a grounded wrist strap whenever accessing the internal parts of the RV20.

Remove the baseplate as described in Paragraph 4.5.2.

Working from the bottom of the baseplate, locate the spindle brake

assembly wiring and disconnect molex connector P32.

Working from the top of the baseplate, remove the two screws and
-

mounting hardware that secure the spindle brake to the spindle.
Remove the brake assembly from the spindle.

Lift the spindle brake cable and P32 up through the baseplate.

To replace the spindle brake assembly, proceed as follows.
1.

Working from the top of the baseplate, thread connector P32 and the

spindle brake cable through the baseplate.
~ 2.

Put the brake assembly in place and secure it with two sets of
mounting hardware.

Working from the bottom of the baseplate, connect P32.

Replace the baseplate as described in Paragraph 4.5.2,

4.5.8. Baseplate Terminator PCA Removal and Replacement
To remove the baseplate terminator PCA, proceed as follows.

CAUTION
Use a static discharge kit with a grounded wrist strap whenever accessing the internal parts of the RV80.

4-30

Remouval and Replacement

Make sure all power is removed from the system (CB1 is in the OFF
position).

Remove the top cover as described in Paragraph 4.3.3. Make sure
that the H9643 cabinet stabilizer leg is extended before pulling the
RV20 out.

Make sure the cartridge door is in the open position to allow room
for the baseplate terminator PCA to be removed. Use the manual
door release to open the cartridge door. (Figure 4-2 shows the location of the manual door release.)

Disconnect all leads on the baseplate terminator PCA, noting their
locations and orientation. J25 and J26 on the front of the PCA are
particularly important because they are identical. Make sure you
know which one is which.

5.
6.

Disconnect the four screws that hold the baseplate terminator to the

baseplate (Figure 4-13).

Carefully slide the PCA out toward the front of the baseplate.

Figure 4-13 Baseplate Terminator PCA
WRITE/PROTECT
SWITCH
BASEPLATE
TERMINATOR
PCA

DATA
CARTRIDGE

SHR-0330-87

Removal and Replacement

4-31

To replace the baseplate terminator PCA, proceed as follows.
1.

Make sure that the cartridge door is in the open position to allow

adequate clearance for the baseplate terminator PCA (see Figure
4-13). Carefully slide the PCA in from the front of the baseplate and

line it up with its four screw holes.

Check the operation of the data cartridge flag (Figure 4-13). The cable that sits underneath the PCA can get in the way if it is improperly seated.
Insert the four PCA mounting screws but do not tighten them yet.

Close the cartridge door and make sure that it is not interfering with

the Write Protect switch (Figure 4-13).
Tighten the four screws that hold the baseplate terminator to the

baseplate.

Connect all leads on the baseplate terminator PCA. Make sure that
P21 is oriented properly. Pin 1 of P21 must plug into pin 1 of J21 on
the PCA. Pin 1 of P21 is marked with a small triangle.
7.

Replace the top cover as described in Paragraph 4.3.3.

4.5.9 Carriage Assembly Removal and Replacement
To remove the carriage assembly, proceed as follows.
WARNING

Never disassemble the laser optics on the carriage assembly.
Invisible Class 3B laser beam can cause serious eye damage.

CAUTION
Use a static discharge kit with a grounded wrist strap whenever accessing the internal parts of the RV20.

4-32

Remove the baseplate assembly as described in Paragraph 4.5.2.

Remouval and Replacement

Remove the motor magnet positioner (Figure 4-14). Use extreme caution when removing the positioner. Proceed as follows.

Using Figure 4-14, find the motor magnet mounting plate.
Locate the four screws that secure the mounting plate to the

baseplate. You must remove these four screws without disturbing
the voice coil.

Remove the four screws (the lower two first, then the upper two)

while holding the positioner steady with your other hand.
c.

Use extreme care as you slide the positioner toward the rear.

If necessary, remove the motor magnet positioner from its mounting
plate by removing the three securing screws (Figure 4-14).

Figure 4-14 Carriage Location
MOTOR
MAGNET
ASSEMBLY

REAR
CRASH

CARRIAGE

ASSEMBLY
(REF)

MOTOR MAGNET

MOUNTING PLATE

SENSOR

Removal and Replacement

SHR-0331-87

4-33

Remove the two screws that secure the upper carriage guide rail

(Figure 4-15), and remove the rail.
5.

Grasp the voice coil carefully and raise it back to gain access to the
flex cable hold-down screw (Figure 4-15).

Remove the flex cable hold-down screw.

Carefully slide the carriage assembly off the lower carriage guide rail
and place it on a non-conductive surface.

Figure 4-15 Carriage Removal
UPPER
CARRIAGE

CARRIAGE
ASSEMBLY
T0

INTERMEDIATE
STIFFENER

CARRIAGE
GUIDE

GROUNDING
STRAP
FWD

SHR-0332-87

4-34

Removal and Replacement

To replace the carriage assembly, proceed as follows.

Hold onto the voice coil of the carriage assembly and line up the flex
cable. Secure the flex cable with the hold-down screw (Figure 4-14).

Carefully put the carriage assembly in place on the lower carriage
guide rail.

Place the upper carriage guide rail (Figure 4-14) in place and secure it
with two screws.

4,
5.

If the motor magnet positioner has been separated frorh its mounting

plate, reposition it now. Replace the three screws (Figure 4-14).

Replace the motor magnet positioner (Figure 4-14). Use extreme caution when handling the positioner. Proceed as follows.

Use extreme care as you slide the positioner toward the voice

coil, The four screw holes should be lined up.

Replace the four screws (the upper two first, then the lower two)
while holding the positioner steady with your other hand.

Replace the baseplate assembly as described in Paragraph 4.5.2.

4.5.10 Guardband Sensor Removal and Replacement

Figures 4-9 and 4-14 show the location of the guardband sensor. Figure 4-11
shows the wiring from the guardband sensor to P25 and P26 on the baseplate
terminator PCA.

To remove the guardband sensor, proceed as follows.
CAUTION

Use a static discharge kit with a grounded wrist strap whenever accessing the internal parts of the RV20.

Remove the baseplate as described in Paragraph 4.5.2.

Removal and Replacement

4-35

Working from the bottom of the baseplate, release the cablerestraining hardware (hold-down clamps or tie wraps) to free the sen-

Sor wires,
3.

At the baseplate PCA, disconnect P25 and P26 and make note of
their locations. Make sure they are marked. The connectors are

identical.
4.

Remove the small screw holding the sensor to the baseplate.

At the carriage assembly, release the carriage lock solenoid momentarily to allow the carriage to move back toward the motor magnet,
Carefully move the carriage assembly toward the motor magnet

positioner.

Pull the guardband sensor wires out through the top of the baseplate.
If there is resistance, make sure that the cable-restraining hardware

has been released to free the wires from the main cable harness.

To replace the guardband sensor, proceed as follows.
1.

Insert the sensor wires down through the top of the baseplate.

Attach the sensor to the baseplate with the small screw.

Carefully slide the carriage forward so the carriage lock solenoid
engages.

Working from the bottom of the baseplate, attach the wires to the

main cable harness.

4-36

At the baseplate terminator PCA, connect P25 and P26.

Replace the baseplate as described in Paragraph 4.5.2.

Removal and Replacement

4.5.11 Tachometer Sensor Removal and Replacement
The tachometer sensor (Figure 4-12) is hardwired to the baseplate terminator
PCA. The path is shown in Figure 4-11.

To remove the tachometer sensor, proceed as follows.
CAUTION

Use a static discharge kit with a grounded wrist strap whenever accessing the internal parts of the RV20.

Remove the baseplate as described in Paragraph 4.5.2.

Remove the spindle as described in Paragraph 4.5.5.

Remove the screw that holds the tachometer sensor to the baseplate
(see Figure 4-12).

Disconnect sensor connector P22 on the front of the baseplate terminator PCA.

Working from the bottom of the baseplate, release the cable-

restraining hardware (hold-down clamps or tie wraps) to free the senSor wires.

Pull the sensor down through the opening. Make sure that the cablerestraining hardware has been released to free the wires from the
main cable harness.

To replace the tachometer sensor, proceed as follows.

1.
2.

Insert the sensor wires through the square hole located on the base-

plate below the sensor mount (Figure 4-12).

Attach a new tachometer sensor to the baseplate with the small
SCrew.

Working from the bottom of the baseplate, attach the wires to the
main cable harness.

At the baseplate terminator PCA, connect P22,

Replace the spindle as described in Paragraph 4.5.5.

Replace the baseplate as described in Paragraph 4.5.2.

Removal and Replacement

4-87

4.5.12 Interlock Solenoid Removal and Replacement
To remove the interlock solenoid, proceed as follows.

CAUTION
Use a static discharge kit with a grounded wrist strap whenever accessing the internal parts of the RV20.

Remove the baseplate as described in Paragraph 4.5.2.

Working from the bottom of the baseplate, locate the interlock solenoid (see Figure 4-16). Operate the cartridge door and notice how the

solenoid works. Leave the door in the closed (solenoid engaged)

position.
3.

Disconnect the J70 connector, which is wired to the two solenoid

tabs.
4.

Remove the three screws that secure the solenoid assembly adapter

plate to the baseplate.
5.

Turn the solenoid over and remove the two mounting screws that
hold the solenoid to the adapter plate and remove the solenoid.

To replace the interlock solenoid, proceed as follows.

1.
2.

Mount the new solenoid on the adapter plate with two screws.
Install the solenoid adapter plate on the baseplate, using the three
mounting screws, but do not tighten the screws.

Connect the J70 connector, which is wired to the two solenoid tabs.

Check to be sure the solenoid is working properly by moving the cartridge door to the open, and then the closed position. Make sure the

solenoid engages properly when the cartridge door is in the closed
position,

4-38

Replace the baseplate as described in Paragfaph 4.5.2,

Removal and Replacement

Figure 4-16 Interlock Solenoid Removal

NOTE:

MECHANICAL DOOR RELEASE
MUST BE PUSHED TO THE LEFT
TO OPEN DOOR MECHANISM
MANUALLY.

MECHANICAL

FWD

DOOR RELEASE
MECHANISM \

BALL
BEARING

INTERLOCK
SOLENOID
MECHANISM

)

BOTTOM VIEW

Removal and Replacement

SHR-0333-87

4-39

4.5.13 Carriage Lock Solenoid Removal and Replacement
To remove the carriage lock solenoid, proceed as follows.
CAUTION
Use a static discharge kit with a grounded wrist strap whenever accessing the internal parts of the RV20.
Remove the baseplate as described in Paragraph 4.5.2.
The carriage lock solenoid is shown in Figure 4-9. Figure 4-17 is a
more detailed set of illustrations of the solenoid. Working from the

bottom of the baseplate, make sure the motor magnet is facing you
while you perform this procedure.
Disconnect the J71 connector, which is wired to the two solenoid
tabs.
Remove the solenoid from the baseplate by removing two screws.

Remove the solenoid from the baseplate casting. Be careful when removing it. The plunger is holding the carriage assembly.
WARNING
When the plunger has been removed, the carriage is no longer
locked in place. Be very careful not to move the baseplate, as
the carriage can be damaged.

To replace the carriage lock solenoid, proceed as follows.
Install the new plunger through the baseplate casting to reengage the

carriage (Figure 4-17).
Seat the new solenoid into the installed plunger. Line up the base of

the solenoid with the holes in the baseplate.
Secure the solenoid to the baseplate with two screws.
Connect the J71 connector, which is wired to the two solenoid tabs.
Very carefully turn the baseplate over.

Once the baseplate is turned over, check to be sure the solenoid is
operating properly. Release the solenoid by hand to allow the carriage
to move. Gently slide the carriage back so it is not engaged by the
solenoid. Then move the carriage forward to make sure the carriage
lock solenoid engages properly.

Replace the baseplate as described in Paragraph 4.5.2.

4-40

Removal and Replacement

Figure 4-17 Carriage Lock Solenoid Removal

TIP

MOUNT

PLUNGER

TIP

PLUNGER

TIP

MOUNT

SOLENOID /Q
PLUNGER

VIEW []

P/0

BASEPLATE

(BASEPLATE CASTING
REMOVED FOR CLARITY)

SCREW (2)

CARRIAGE
INTERLOCK
SUPPORT
BRACKET

P/O

BASEPLATE

/ %f
VIEW[{

\{_ .
|

(BOTTOM VIEW)
SHR-0334-87

Removal and Replacement

4-41

Index

Card rack removal and replacement,

AC power distribution problem isolation, 3-7

AC power problem isolation, 3-6
Address plug, 1-9

Automatic self-test mode, 3-12

4-14 to 4-156

Card rack backplane removal and replacement, 4-15

Carriage lock solenoid removal and
replacement, 4-40 to 4-41

Carriage removal and replacement,
4-32 to 4-35

Connectors, 1-15, 1-16

Baseplate

Parts locations, 4-16 to 4-17
Removal and replacement, 4-21 to
4-23

Cover removal and replacement, 4-5
D

DC power problem isolation, 3-8 to

Wiring, 4-19

Baseplate terminator PCA removal

and replacement, 4-30 to 4-32
Bezel removal and replacement, 4-4
to 4-5

Block diagram, 1-3

Brake, spindle, removal and replace-

3-9

Diagnostic test disk, 1-5
Diagnostics, 1-5
See also Tests

Drive subsystem controller
Fatal error indication, 2-40
Function, 1-2, 1-3

ment, 4-30

Testing, 2-37 to 2-40

CB1, 1-16

EEPROM

CE mode
Tests, 3-1 to 3-4

Entering, 3-13

Contents, 3-20
Read/modify test procedure, 3-19
to 3-20

Index-1

EVRVA, 2-2

Maintenance panel, 1-10 to 1-15

EVRVB, 2-27

Initialization problem isolation,

EVRVC, 2-33

3-11

Equipment, 1-5

Removal and replacement, 4-7

Error classes, 2-15

Master reset, 1-10, 1-15

Error codes, 2-16 to 2-18

Message fields, 2-14 to 2-15

Error logs, 2-35, 2-36

MicroVAX Diagnostic Monitor

Error reporting

See MDM

Level III, 2-14 to 2-20, 2-27

Level IIR, 2-32
Level 2R DUP, 2-35

Error Reports, 2-19 to 2-20

o)
Off-line testing, 3-1

On-line testing, 2-1

Operation, 1-6 to 1-16

Failure analysis, 3-21

Operator panel, 1-7, 1-8 to 1-9
Initialization problem isolation,

Failure codes, SAM, 3-22 to 3-72

3-10

Fan removal and replacement, 4-20

Removal and replacement, 4-6

Field replaceable units, 1-4

Filter grill/filter removal and replacement, 4-2 to 4-3

Front bezel removal and replace-

Parts locations, 1-7, 1-10, 1-16, 4-4,
4-8, 4-11, 4-16 to 4-17, 4-19,

ment, 4-4 to 4-5

Front panel, 1-6 to 1-9

4-31

Power controller, 1-1
Power indicator, 1-7, 1-9

Guardband sensor removal and replacement, 4-35 to 4-36

Power supply removal and replacement, 4-8 to 4-10

Power switch CB1, 1-16
Power-up procedure, 3-5

H
H9643 cabinet, 1-2

PCA removal and replacement, 4-10
to 4-13

ISI bus, 1-1
Interlock solenoid removal and re-

placement, 4-38 to 4-39
K

RA- series disk drive, 1-1

Ready indicator, 1-8
Rear panel, 1-15, 1-16

Related documentation, 1-6
Removal and replacement proce-

KLESI adapter, 1-2

dures, 4-1

MDM, 2-1, 2-20 to 2-27

SAM, 3-1, 3-3 to 3-13

Index-2

Failure codes, 3-22 to 3-72
Procedure 1000, 3-5

Procedure 1001, 3-6
Procedure 1002, 3-7

Procedure 1003, 3-8 to 3-9
Procedure 1004, 3-10
Procedure 1005, 3-11
Procedure 1006, 3-12

Procedure 1007, 3-13
Test Procedure, 3-14 to 3-20

Start/stop switch, 1-7, 1-8
Structured Analysis Method
See SAM
T

TMSCP unit number, 1-7
Tachometer sensor removal and replacement, 4-37

Terminators, rear panel, 3-2
Tests

Descriptions, 2-7 to 2-14, 2-30 to

Sensors

Guardband, removal and replace-

2-31

Level III, 2-2, 2-20

ment, 4-35 to 4-36

Tachometer, removal and replace-

Level 2R DUP, 2-33
Level IIR Data Reliability, 2-27

ment, 4-37

List, 2-6 to 2-7, 2-34

Solenoids

Carriage lock, removal and re-

Running, 2-4 to 2-7, 2-25 to 2-27,

placement, 4-40 to 4-41

Interlock, removal and replacement, 4-38 to 4-39

2-30

Tools, 1-5

Top cover removal and replacement,

Spindle brake removal and replace-

4-5

ment, 4-30

Spindle grounding brush removal and
replacement, 4-26

Spindle motor/cable assembly removal and replacement, 4-28 to

VAX Diagnostic Supervisor
See VDS

4-29

VDS, 2-1, 2-2 to 2-20, 2-27 to 2-35
VMS Error Logs, 2-35, 2-36

placement, 4-24 to 4-25

Spindle pulley belt removal and reSpindle removal and replacement,
4-26 to 4-28

Standalone tests, 3-1

Wiring, 4-18, 4-19

Write Protect switch/indicator, 1-7,
1-9

Index-3

Digital EqQuipment Corporation e Shrewsbury, MA

01545