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EK-0TS11-PS-1

June 1980

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Document:	TS11 Pocket Service Guide
Order Number:	EK-0TS11-PS
Revision:	1
Pages:	76
Original Filename:

OCR Text

EK-OTS11-PS-001

TS11

POCKET SERVICE GUIDE

- digital equipment corporation ® maynard, massachusetts

1st Edition, June 1980

The material in this manual is for informational purposes and is subject to change without notice.
Digital Equipment Corporation assumes no
responsibility for any errors that may appear
in this manual.
Printed in U.S.A.

The following are trademarks of Digital
Equipment Corporation, Maynard, Massachusetts.

DIGITAL

DEC

IAS

MASSBUS

DIBOL

PDT

DIGITAL Logo

RSTS

RXX

DECwriter

DECUS

VMS

EduSystem
DECsystem-10

UNIBUS
DECnet

VT
0S/8

DECSYSTEM 20

CHAPTER1
et
ek

INTRODUC

General .......o

Subsystem Overview ....................
TS11 Assemblies...........ccoviian.s
Controls and Indicators..................
Operator Panel (Normal Mode)........

Operator Panel (Maintenance Mode}). ..
Maintenance Panel (Test Panel) .......

TOOIS vt

Spares Kit List..............oviett
Applicable Documentation. .............

System Diagnostics .................. ..

fed

ok pad pocd ped pewch pned ook

CHAPTER 2

INSTALLATION

M7982 Installation ....... P
Installation Checklist. . .................

TROUBLESHOOTING

General ..ot

UTSTM... ...

Lo
B ==

UG B

W L) L) L0 W0 W) L) L0 0 W W) L W
hrbinb bbb
D=

CHAPTER 3

PETSM ... e

Initialization Microdiagnostics...........
Off-Line Microdiagnostics ..............

ErrorCodes ....ooiiiiiiiiiiii i
onn.
iii
Fatal Errors. . ... ovii
Non-Fatal Errors ...................
Off-Line Test Errors ................

iv.

CONTENTS

CHAPTER 3

3.6
3.6.1
3.6.2
3.6.3
3.7
3.8
3.8.1
3.8.2
3.8.3
3.84
3.8.5
3.9
3.9.1

TROUBLESHOOTING (CONT)

How To Run Microdiagnostics.......... 36
Internal Microdiagnostics (Inline). . ... 36
Internal Microdiagnostics (Initialization) .............. ... 36
Off-Line Microdiagnostics (Customer
Confidence and Maintenance......... 36
Customer Confidence Check............ 36
Operating Instructions For PDP-11
Based Diagnostics ..................... 37
Data Reliability Program Tests....... 37
Control Logic Program Tests........ .37
Program Control Flags .............. 38
Hardware Parameters ............... 38
~ Software Parameters ................ 39
Special Techniques .................... 39
Dead Track Card Identifier .......... 41

CHAPTER 4
REMOVAL AND
REPLACEMENT
4.1
4.2
4.3
4.4

4.5
4.5.1
45.2
4.6
4.6.1
4.6.2
4.7
4.7.1
4.7.2

Special Procedures.....................
Module Replacement...................
Operator Panel........................
BOT/EOT Sensor.....................
Capstan Wheel........................
Capstan Wheel Removal............ .
Capstan Wheel Replacement. ........
Fixed Reel Assembly ..................
Fixed Reel Assembly Removal.......
Fixed Reel Assembly Replacement ...
Snap Lock Hub Assembly..............
Snap Lock Hub Assembly Removal...
Snap Lock Hub Assembly Replace-

4.8
4.8.1
4.8.2
4.9
4.10
4.10.1
4.10.2
4.11

Lower Roller Assembly ................ 45
Lower Roller Assembly Removal ... .. 45
Lower Roller Assembly Replacement. . . 46
Upper Roller Assembly ................ 46
Tension Arm Assembly ................ 47
Tension Arm Assembly Removal . .. .. 47
Tension Arm Assembly Replacement. . . 47
AC Input/Line Filter Box .............. 48

42
43
43
44
44
44
44
44
44
44
45
45

ment .........
... .,
.. 45

CONTENTS

CHAPTER 5
5.1

5.2
5.2.1
5.2.2
5.2.3
5.24
5.2.5
5.2.6
5.2.7
5.2.8
5.2.9

ADJUSTMENTS

‘Quick Reference Adjustment
Specification . ................
... .. ... 49

Adjustment Procedures.................
Tension. .......oovuviiiinennnnn
Tape Path Alignment Adjustment. . ...
Final Tension Adjustment............
Speed Test...............ccouvnt..
Preamplifier Amplitude Adjustment ...
Threshold Adjustment . ..............
V.C.O. Adjustment. . ................
Skew Meter Calibration .............
Head Skew Adjustment..............

APPENDIX A

APPENDIX
B

TROUBLESHOOTING
FLOWCHART

52
52
53
55
55
55
56
57
58
58

FIGURES

1-1
1-2
1-3
1-4
- 1-5
1-6
1-7
2-1
2-2
4-1
5-1
5-2
5-3
5-4
5-5
5-6
5-7
5-8
A-1
A-2
A-3

TS11 Subsystem Block Diagram ......... 2
TS11 Subsystem Major Assemblies....... 3
Transport Assemblies — Front View...... . 4
Transport Assemblies — Rear Vlew ....... 5
Maintenance Panel. ..................... 7
LogicRock ..., 8
Operator Panel — Maintenance Mode ..... 9
M7982 Interface Module............... 16
Typical Subsystem Configurations ....... 17
Deck Plate Assembly (Rear View)....... 46
Tension Arm Adjustment............... 53
Capstan Gimbal Adjustment ............ 54
Tape Path Guides ..................... 54
Capstan Speed Adjustment ............. 56
Read Preamp Locator.................. 57
Read Preamp Adjustment............... 58
Threshold and VCO Adjustment. ........ 59
Head Skew Adjustment ................ 60
TS11 Register Summary................ 61
Bus Address Register .................. 62
Data Buffer Register . .................. 62

CONTENTS

FIGURES (CONT)
A-4
A-5

STATUS Register..................... 63
Residual Frame Count Register ......... 63

A-6
A-7
A-8
A-9

Extended STATUS RegisterO0..........
Extended STATUS Register 1..........
Extended STATUS Register2..........
Extended STATUS Register 3..........

B-1

Troubleshooting Flowchart. ............. 66

64
64
65
65

TABLES
2-1

2-2
3-1

3-2
3-3
34

Interrupt Vector and Address
Assignments ................. ...,
Address and Vector Examples ..........
Test Descriptions. .....................

15
15
19

3-5
3-6
4-1

Fatal Microprocessor Errors .. ..........
Non-Fatal Microprocessor Errors. .......
Customer Confidence or Maintenance
Mode Test Errors .....................
Bring-Up Procedure Errors .............
Dead Track/Module Locations..........
Module and Adjustment Number........

24
28

5-1

Adjustment Specifications ......... SO 49

31
40
41
43

INTRODUCTION

1.1

GENERAL

This document is designed for use by someone trained to
service a TS11 Subsystem. Procedures are brief, concise, and support the maintenance philosophy of module
replacement.

The first two chapters present product overview and installation information for quick review. Chapter 3 is
troubleshooting information. Use of diagnostics and
maintenance panel features allow quick location of malfunctions. Chapter 4 describes removal and replacement
procedures and Chapter 5 explains how to check and adjust the TS11.

Programming information is not provided but register
summaries and definitions are found in Appendix A and
a Troubleshooting Flowchart in Appendix B.

This chapter is a compilation of information and reference material needed to service the TS11 Subsystem. It
is intended to provide a quick overview of the product.

2Ingig [-1

—— id" sNg

>11S.LwasAsqns-NVy.o1Sd¥lDgweldeLlSdqVDNV _|MOLOW
2

INTRODUCTION

r—

OSN8NOo

INTRODUCTION

1.2

SUBSYSTEM OVERVIEW

The TS11 Subsystem Block Diagram is shown in Figure 1-1.

1.3 TS11 ASSEMBLIES
Major TS11 assemblies are shown in Figures 1-2, 1-3,
and 1-4.

LOGIC RACK

POWER SUPPLY

=
I

==—=r

TRANSPORT

MAINTENANCE
PANEL

POWER
CONTROLLER

lf [ll“

“NNIINIHI“
m
i

““

ml”

UNIBUS
INTERFACE

MA-4001

Figure 1-2

TS11 Subsystem Major Assemblies

INTRODUCTION

72 PIN

OVER TQOP
CONNECTORS

—

LOGIC
ENCLOSURE

MODULE
CONNECTORS

[

NNNNNnEINnAn
AY

[Te]

[e)]

[<o]

l 1
N N

o8]

gy0 Soo
9y
O 00 O

gL 08 OeEo0
© WLN
/Mo
0

BBb

TEST

POINTS

0N
L INTENANCE
MAINTENANCE

5\d,
P 1]

PANEL
e

e - -

PICO FUSES
TOTS11

‘“51)7982)

TO
J1 ON (G159)
CAPSTAN MOTHER
MODULE
(70-13581)

BOARD

ASSEMBLY

gsgxMJgsocN;ofiss)AD
(

‘

(READ CABLE)

(70-13582)

TO WRITE HEAD

(WRITE CABLE)
(70-14149)
NOTE:

M8922 AND M8962 MODULES IN SLOTS
7 AND 8 ARE JOINED BY AN OVER-THE-TOP

MODULE CONNECTOR.
MA-4003

Figure 1-3

Logic Rack

INTRODUCTION

CAPSTAN POWER AMP
UPPER ARM

G159-CAPSTAN SERVO
AND OPERATING PANEL

LIMIT

(SEE DETAIL A)

SWITCHES

UPPER

REEL MOTOR

"“
TENSION ARM ASSY.
|~ (SEE DETAIL B)

cimm

CAPACITOR_]

M@
— G057 PREAMP

(SEE DETAIL D)

////fi..\ TENSION ARM ASSY.

\ @:L\ (SEE DETAIL B)

REELSERvo/l

G158

~_CAPSTAN MOTOR

BOARD

AND TACH ASSY.

(SEE DETAIL C)

LOWER

CAPACITOR

LOWER ARM

REEL

LIMIT

MOTOR

SWITCHES

FIXED END

—

TENSION ARM

TRANSDUCER \ \\\\

G159

[]s3

121

\\\TENSION

sa[]

SPRING

sg@U;U J5 [

/1 \R26

R87 R95
F

TENSION

ARM PIVOT

DETAILD
E—

DETAILC

PREAMP
ADJUST

SERVO

POSTS

SWITCH
e

3415

J2[]

DJ16

DJ13
CJ14

MA-4007

Figure 1-4

Transport Assemblies (Rear View)

INTRODUCTION

1.4 CONTROLS AND INDICATORS
The following three sections offer a brief explanation of
TS11 Subsystem controls and indicators.

1.4.1 Operator Panel (Normal Mode)
Refer to Figure 1-5 while reading the following text.
Control Functions
LOD (load)

Used to load, unload, or rewind
tape

NOTE
Tape will not rewind if M7982 is not powered
up.

ONL (on-line)

Used to place unit on-line or offline

Indicator Functions

LOD (load)

Tape loaded and reel motors
energized when on

ONL (on-line)

TS11 ready for system commands
when on

UOK
(microprocessor

Correct microprocessor
operation when on

okay)

check error)

Tape reel status change
occurred when on

DCK (density
check)

Incorrect tape density
being read when on

WLK (write

locked)

No reel mounted or no
write-ring in mounted reel when on

BOT (beginning
of tape)

BOT marker is over sensor
when on

EOT (end of
tape)

EOT marker is over or
passed sensor when on

VCK (volume

INTRODUCTION

OPERATOR PANEL

(GREEN)

(BLUE)

(WHITE)

(RED)

—~

LOD { ONL | UOK | VCK | DCK | WLK | BOT | EOT

TENSION ARM

ASSY. W/ROLLER
TAPE GUIDE

SNAP
HUB ASSY

SUPPLY REEL

BUFFER

ARM ASSY \/
FIXED TAPE

GUIDE

BOT/EOT ASSY —
TAPE CLEANER—

ERASE HEAD—

READ/WRITE
HEAD

FIXED TAPE

GUIDE

TENSION
ARM ASSY.

W/ROLLER
TAPE GUIDE

CAPSTAN

TAKE-UP REEL

ROLLER

TAPE GUIDE
MA-3998

Figure 1-5

Transport Assemblies (Front View)

INTRODUCTION

iNDICATOR FUNCTION

SWITCH FUNCTION

START/

(GREEN) (BLUE)\__

CONTROL
& INDICATOR

|
!

1
NONE

INDICATORS
(WHITE)

1
&

_J (RED)

K’“’J

CONTROL &
INDICATOR

LSB

MSB
* = ALSO LOADS TAPE
IF NOT LOADED

(IF ALL DISPLAY
LIGHTS ARE OUT)
MA-4000

Figure 1-6

1.4.2

Operator Panel (Maintenance Mode)

Refer to Figure 1-6 while reading the following text.

Control Functions

ONES

Enters one into LSB position and
shifts entire register contents left
when pressed

START/STOP

Loads tape if not loaded and causes
selected test to run when pressed
and halt when released

ZEROS

Enters zero into LSB position and
shifts entire register contents left
when pressed

Indicator Functions

All indicators are used to display in octal notation (377
max.) the number of the test entered by means of the
ones and zeros controls. A test failure causes an error
code to be displayed.

INTRODUCTION

‘J,»MODULES
LOGIC

ENCLOSURE

4
ANALOG

VTEST POINTS
TEST .

(O skew ouT

TEST

rD4 ()

pOINTS

roe O

R00O

ASSEMBLY

©OF*

Onros

O nro2

Oor

MAINTENANCE PANEL LEDS
PC1Y

PCIO

PCY

PCB

PC7

PC6

PCS

PC4

O
EXT MEM

STK

RESET

PERR

ACLO

STEP

CLK

STOP,

CROM

PC3

Pél’

PERR

O
|

HALT

DIS ERR

MAINT MODE

(g?ig)

(@:)

(??)

AUN

ENB ERR

NORMAL

PC1

IGEN)

CO000j|0O00
QOO0

]

()

OO
OO

J36

PCO

QE@©

¥
~—_MOTHER BOARD

PANEL

]
MA-4005

Figure 1-7

1.4.3

Maintenance Panel

Maintenance Panel (Test Panel)

Refer to Figure 1-7 while reading the following text.

Test Points

RD0O—RD7; RDP

Function

Read channel analog test points,

these signals are preamplifier
outputs for data and parity

channels
SKEW OUT

Analog output of internal skew
meter, signal is overall skew as

function of voltage

INTRODUCTION

Indicators

PC11—PCO

Function

Displays contents of
MiCroprocessor program counter,
PCOis LSB

EXT MEM

STK PERR

Indicates which of two 2K memory
banks is accessed when PC displays
an address larger than 3777(8); i.e.,
0—3777 always accesses same
ROMs on M8964 but 4000—7777
access one of two banks of ROMs
on M8968 depending on state of
EXT MEM bit
Indicates stack parity error has
occurred when on

ACLO

Indicates ac line voltage went
below acceptable limits when on

CLK STOP

Indicates microprocessor clock not
running when on

CROM PERR

Indicates control ROM parity error
occurred when on

Controls

Function

RESET SW

Resets microprocessor to PC=0
for a reinit and clears registers
when pushed

STEP SW

Causes microprocessor to do one
instruction when pushed

HALT/RUN SW

Disables or enables microprocessor

DIS ERR/ENB
ERR SW

Disables or enables halt-on-error
function

MAINT MODE/
NORMAL SW

Places transport into maintenance
or normal mode

NORMAL SW

mode

INTRODUCTION

1.5 TOOLS
In addition to the standard DIGITAL tool kit the following tools are required to service the TS11.

Description

DEC Part Number

Oscilloscope with
probes (2-X10)

—

Standard amplitude tape

29-11696

Master skew tape

(600 ft)
(1200 ft)

29-22020
29-19224

BOT/EOT markers

90-09177

Hub spanner wrench

29-22999

Double height extender

Wo8g4

1-3/8 in. socket
(3/4 in drive)

Tension gauge

—

(0—500 gram)
Hub height gauge

96-07951

Roller height gauge

96-07952

1.6

SPARES KIT LIST

DEC Part Number

Description

Preamplifier module

G057

Read/write module

G157

Reel servo module

G158

Capstan servo module

G159

UNIBUS interface
PE control

M7982
M8922

Read control
PE format

M8923
M8924

Write control

M8929

Microprocessor

M8962

Stack
ROM board
1/0 shift reg
I/0Osilo

M8963
M8964
M8965
M8966

INTRODUCTION

DEC Part Number

Description

I/O control

M8967

ROM extension
Pico fuses 5A
Switch toggle
Switch push button
EOT/BOT assembly

M8968
12-05747
12-09590
12-11079
12-11720

Bulbs (GE #73)

12-12716-01

Snap lock hub assembly

12-13119

Fixed roller assembly
CD kit case
Capstan driver

12-16060

29-23083
54-13692

board extender

Tension arm

70-14014

Limit switch

70-15666

Capstan wheel

74-18010

Capstan wheel clamp

74-18021

Lens caps

Color

Logo

Green
Blue

LOD
ONL

12-14343-20

White
White
White
White
White

VOK
VCK
DCK
WLK
BOT

12-14343-22

Red

EOT

12-14343-21
12-14343-23
12-14343-24

12-14343-25
12-14343-26
12-14343-27

1.7 APPLICABLE DOCUMENTATION
The following documentation is available if more information on the TS11 Subsystem is required.
Field Maintenance
Print Set

MP00848
MP00849

TS04-A-1
TS11-A

TS11 Subsystem
Technical Manual
{User Manual plus

EK-OTS11-TM

theory of operation
and servicing)

TS11 Subsystem

User’s Guide
{(installation,

microd:agnostic
operation, customer

care and operating
information)

EK-OTS11-UG

INTRODUCTION

All TS11 options are covered by the following Illustrated Parts Breakdowns (IPBs).
872 Power Controller

EK-00872-1P

861 Power Controller

EK-00861-1P

TS11 A (standalone)
TS11 B (TS11 A and

EK-TS11A-IP
EK-TS11B-IP

H9502 cabinet)

TS11 C (TS11 A and

EK-TS11C-IP

H9546 cabinet)

TS11 D (TS11 A and

EK-TS11D-IP

H950 cabinet)

1.8 SYSTEM DIAGNOSTICS
Section 3.8 provides operational details for the follow-

ing tests.

Transport Control Logic Test (CZTSI)
This test causes data-wraparounds through the TS11,
the serial bus, the I/O silo, and the formatter. The output of this test calls out a failing module when an error
occurs.

Transport Data Reliability Test (CZTSH)
This test simulates a worst case operating environment

for the transport by executing commands in random order, with random record lengths and data. This test is
mainly a confidence test.

INSTALLATION

2.1 M7982 INSTALLATION
M7982 vector and address settings are listed in Table 21. An example of these settings is given in Table 2-2 and
Figure 2-1 indicates switch locations on the TS11 interface module. Figure 2-2 shows a typical Subsystem configuration.
2.2

INSTALLATION CHECKLIST

Unpack and place.

Inspect for the following things.

Broken components

Shorted pins

Proper card seating

Complete plug seating

Set M7982 address and vector switches.

Remove the bus grant card (G727, G7270).

. Cut CA1 to CBI (NPG) jumper on the SPC backplane slot.

Insert the M7982 module, and connect the serial
bus interface cable attached (TS11-J1 to motherboard J4).
NOTE

The M7982 LED lights up if the imterface
cable is reversed.

. Verify correct voltage and frequency at the rear of
the transport.

INSTALLATION

Table 2-1

Interrupt Vector and Address Assignments
Interrupt

UNIBUS

TS11

Vector

Address

]

224

772 520

TSBA /TSDB

772 522

TSSR

Table 2-2

Floating

772 524

TSBA/TSDB

rank 37

772 526

TSSR

Floating

772 530

TSBA /TSDB

rank 37

772 532

TSSR

Floating

772 534

TSBA/TSDB

rank 37

772 536

TSSR

Address and Vector Examples
ADDRESS

X X X

xx1

2
0

xx1

X X X

x x off

8
0

EfO

E34

xxx

71109

onoffon

off onoff

2%«

onoffon

onxx

on=0;off =1

VECTOR

X X X

4
0

E34

on=0;off =1

onoffon

off
x x

INSTALLATION

NOTE
When 50 Hz power is used, both switches on
the G158 board must be in the open or off position. (At 60 Hz both must be closed or on.)
Also, verify that the ac input box (TS04 Power

Supply) is correct. It is necessary to check the
tension arm adjustment when changing from
60 Hz to 50 Hz power.

W30 WZI

W10

O W50 W4I
W6
O

O
W70

TS11 (M7982)

PUSH HERE TO
TURN ON

PUSH HERE TO

[JLED

WQI W80

PRIORITY
ON]

OFF

100

|1000000000| 1

PLUG

TURN OFF
MA-3988

Figure 2-1

M7982 Interface Module

8. Power up the transport and verify all voltages. (Refer to Paragraph 5.1).

9. Place the transport in maintenance mode and view
the PC lights. Check for errors.

INSTALLATION

10.

Load a tape (tape will not be positioned at BOT).

11.

Run internal diagnostics, the control logic test,
then the data reliability test. (Test 47 fails in auto-

sequence mode if the TS11 is not powered up.)

M7982 MOUNTS

PDP-11

IN EXPANDER

CPU

BOX
EXPANDER

BOX[ -

i1 1

J1/M7982

(TYPICAL)

SERIAL BUS CABLE

(TYPICAL)

TS11

(32
L

J'|

J4/MOTHER
BOARD

ASSEMBLY

NOTE:

NPG JUMPER, CA1 TO CB1,

FOR EACH M7982 SLOT

MUST BE CUT.
MA-.3985

Figure 2-2

Typical Subsystem Configurations

TROUBLESHOOTING

3.1

GENERAL
Sections 3.2, 3.3, and 3.4 describe microdiagnostics; Section 3.5 details error codes and error tables. Section 3.6
describes microdiagnostic operation; Section 3.7 describes the customer confidence check. Section 3.8 de-

scribes PDP-11 based diagnostic operation and Section
3.9 lists special troubleshooting aids.

3.2 INTERNAL MICRODIAGNOSTICS (IN-LINE)
These five tests verify basic microprocessor operation.
They run anytime the transport is powered up and has
not executed a subsystem command for approximately
500 milliseconds. Brief test descriptions follow.
3.2.1

UTSTM

This tests M8962, M8964, and MB8968 boards and
checks all transport instructions, the input bus, and the
output bus.

3.2.2

STAKM

3.2.3

I0TSM

This tests 64 byte push/pop RAM on the M8963 board
and communications with the G159 board. Also,
STAKM tests parity, overflow detection, attention
branch logic, and the attention register of the stack. It
performs a data wraparound on the capstan bus and
checks the CBUS and branch logic.

This tests functionality on the MB8965, M8966, and
M8967 boards and attention logic on M8963. ICTSM
performs a simple handshake over the TS11 bus.
3.2.4

CATSM
This tests functionality of the G159 and the remainder

of M¥8963 not checked by STAKM and I0TSM.
CATSM checks the IKHz clock, simulated capstan motion, and the logic part of the digital servo system.

TROUBLESHOOTING

3.2.5

PETSM

This tests some functionality of M8923, G157, M8929,
M8924, and M8922. It checks M8929 clock logic and

silo interface to the

M8966, G157, and M8923 puise generators. Also checked is the center frequency of VCO on

M&922 and M8924 window logic. PETSM checks data
through the G157, M8923-24-22 boards. Performs

XORs and checksums for the formatter table lookup
ROMs on the M8922 board.
3.3

INITIALIZATION MICRODIAGNOSTICS
These tests are internal (inline) diagnostics but run un-

der special conditions to check more hardware. They alter registers in the transport and reset them to a specific

initial value. If a customer operation was taking place

when these were invoked, data could be altered. These

diagnostics are invoked by power-up, maintenance
panel reset, subsystem initialize, or the UNIBUS initialize.
3.4

OFF-LINE MICRODIAGNOSTICS
Confidence and Maintenance Tests)

(Customer

These tests check transport functionality including tape

motion, read data, and write data. A standard amplitude tape must be loaded on the transport to run the off-

line tests. Each test is briefly described in Table 3-1.

Table 3-1 Test Descriptions
Test

No,

Description

Field Service PM Test (Test 0 is illegal) — Causes
tests 2 through 47 to auto sequence to completion or
error

Capstan Board Clock Test — Tests capstan 1 ms
clock, TAC sync flop, and TAC attention logic

Capstan Simulated Motion Forward Test — Sets
capstan maintenance signal to prevent motion and

simulates acceleration and deceleration in forward,

capstan should not move, reel motors may shift

position slightly

Capstan Simulated Motion Reverse Test — Same as
Test 3, but in reverse

TROUBLESHOOTING

Table 3-1 Test Descriptions (Cont)
Test

No.

Description

Reel Motors Off Test — Turns reel motors off and
checks G159 board for negation of reel motor on
signal

Reel Motors On Test — Same as Test 5, but turns

Tach Phase Forward Test — Checks tach phase duty

motors on and looks for assertion of signal

cycle and relationship between tach phases 1 and 2 in
forward

NOTE

If a tach “fin” is bent, it may not be seen on the
scope (because of 500 or so others) but the test
will detect it.

Tach Phase Reverse Test — Same as Test 7, but in
reverse

Forward Speed Test — Checks forward capstan
speed

Reverse Speed Test — Checks reverse capstan
speed

Capstan Deceleration Test — Checks capstan
stop time in number of ticks

1/0 Micro Basic Test - Checks I/O micro atten-

tion logic and data path
15

1/0 Micro Flag and Frame Counter Test - Rechecks data path, sets and resets 1/O flag bits,
clocks and rotates a pattern through frame
counter

I1/0 Silo Good Parity Data Test - Writes 1/0
silo with good parity and returns it to main mi-

cro with silo parity error register to check for errors

1/0 Silo Bad Parity Data Test ~ Same functionality as Test 16 but causes bad parity and looks
for error in silo parity error register

TROUBLESHOOTING

Table 3-1 Test Descriptions (Cont)
Test

No.

Description

I/O Loop-around zeroes Test - Writes into 1/0
extended address, OP code, and shift registers,

then shifts eight times and looks for error
21

I/O

Loop-around

ones

Test Wraparound

Same as test 20 but with ones to test for bits that

cannot be set to one
22

I/O Loop-around MUX Test - Checks 1/O’s
ability to multiplex shifting sequence from 5-bit
to 21-bit, to 23-bit shift, checks /O STWORD

and STBYT instructions
23

Write Board Clock Test - Fills I/O silo with data
and checks M8929’s ability to empty silo at three
selectable data rates

Formatter Flag and Sync-up Test - Sets and

clears formatter flag control bit, and tests write
board formatter and silo for sync-up time by
writing special pattern into I/O silo and timing

formatter’s time to fill up formatter’s silos (done
in formatter wraparound mode)
25

Formatter Peak Shift and FWD/REV MUX
Test —~ Checks formatter’s ability (M8924 boards)

to shift data and phase window to follow peak
shift and FWD/REV MUX (M8923 and G157)
26

Formatter Table Look-up ROM Checksum Test
— Checks M8922 ROMs by checksum testing all

ROM locations
27

Not Used

Skew Meter Calibration Test — Checks skew meter circuit with microprocessor generated data

Data Head Test - Writes data at 40 percent
threshold and verifies each head, five out of eight
64 byte bursts can be read without error

TROUBLESHOOTING

Table 3-1 Test Descriptions (Cont)
Test
No.

Description

Erase Head Test - Checks that erase head can

reduce residual tape signal to less than 7 percent
34

Minimum Amplitude Test — Checks capability to
read most 3200 FCI data written at 80 percent

threshold
35

Maximum Amplitude Test — Checks capability
to prevent reading most 3200 FCI data transitions when written at 120 percent threshold

Secondary Pulse Test — Checks for excess characters in record after write head turnoff

Feedthrough Test — Checks for noise when read-

ing during write at 7 percent threshold
40

Tracking Test — Checks that tape path across

head is same in forward and reverse
41

PE Data Test - Writes 72 records at normal

thresholds; sets errors for more than four bad records42

PE Data Test - Writes 72 records, reads reverse
without checking errors, and reads forward at 70

percent threshold; sets error for more than 30

bad records
43

PE Data Test -~ Writes 72 records and reads re-

verse at 60 percent threshold; sets error for more
than 30 bad records
44

PE Signal Sag (RD FWD) - Writes 64 records

and positions back and forth over data 10 times,

checks to read 32 or more records at 70 percent
threshold on final read forward
45

PE Signal Sag (RD REV) Test - Same as Test 44
but read reverse is final operation

Rewind Test - Checks that rewind stops at BOT
and no limit switch error

TROUBLESHOOTING

Table 3-1 Test Descriptions (Cont)
Test

No.

Description

NOTE
This test may be used to rewind tape if M7982 is
not powered up.

I/O Serial Bus Wraparound Test - Checks basic

serial bus operation, alsc, sends out bad serial
bus parity to the UNIBUS interface to set SPE
bit in TSSR after this test
NOTE
This test fails if M7982 is not powered up.
Auto Sequence Stops here. Tests 50 through 57 run

manually only
50

Forward/Reverse Skew Test — Checks head skew

in forward and reverse
NOTE
A skew tape must be mounted for proper oper-

ation.

Forward Read Test - Causes normal PE read
cycle, forward at BOT, reverse at EDT

Reverse Read Test — Causes normal PE read
cycle, forward at BOT, reverse at EOT

Write Zeros Test - Causes 256 character, all zero

records to be written on tape, rewinds when EOT
is hit
54

Write Alternating Ones Test — Same as Test 53
with alternating ones pattern (Parity track will
always be a one though)

Stack Test — Causes stack verify test to loop with
good

and

bad

parity;

if error,

will

halt

1772-1774
56

CBUS Test - Causes CBUS communication test
to loop; if error, will halt at 1775-1777
Manual Switch and Light Test - Scans reel mo-

tors on, operator panel switches, limit switches,
write lock switch, and BOT/EOT sensors, these

~are then displayed in operator pane! indicators

TROUBLESHOOTING

3.5 ERROR CODES
This section describes the three error code classes and
defines the error codes.
3.5.1
Fatal Errors
These errors are caused by a failure in the main micro

and are identified by all operator panel lights out and
the CLK STP and CROM PERR lights on. The PC
lights indicate the fatal error. Accepted range is from
1750—1777. Values outside this range indicate CROM
parity errors. Table 3-2 lists the fatal error, error description, and the module that probably failed.
NOTES

The display in the operator lights and
switches at this point may not apply to the
error.

To loop microdiagnostics on error halt,
raise
the
override
switch.
Set
the
HALT/RUN switch to halt (for single
step). Set the HALT/RUN switch to run
to loop continuously. Press the step switch
to recycle.

Table 3-2

Fatal Microprocessor Errors

Error
(PC counter)

1750

Probable
Test Error Description

Module

Main micro detected

M8967

CROM parity error in
I/O during operational

code
OP END entry called at
wrong time; microcode

bug halt

IOM received bad data
from I/O at end of data
operation when
expecting record-length
flags, probably means

1/0 microproblem

Start I/O operation
called at wrong time;
probably microcode bug

TROUBLESHOOTING
Table 3-2

Fatal Microprocessor Errors (Cont)

Error
(PC counter)

.
Test Error Description

Probable
Module

1751

DISPM

Spurious ATTN (Noise
on .NATTN line?)

M8963

1752

DISPM
MTCTM

Fatal stack parity error
or overflow error
occurred, may be
hardware failure of
stack board or

M8963

microcode stack bug

halt

1753

DISPM

Stack not empty and
- nothing more to do
could be hardware stack
pointer problem or
microcode bug (too
many pushes or pops)

MTCTM

Maintenance mode fatal
microcode bug halt

1754

UTSTM

1755

UTSTM

1756

UTSTM

Stack pointer will not
hold data

M8962

M8963
M8964

Failure of one of branch

M8964

tests

MEg968
M8962

Failure of
Z bit test -

M 8962

Z bit says result of last

M8964

arithmetic operation
was Zero)
1757

UTSTM

Failure of N bit test -

M8962

(N bit says result of last

M8964

arithmetic operation
was negative or OBUS
bit 7 was a one during

last instruction)
1760

UTSTM

Failure of C bit test (C bit says result oflast
arithmetic operation
should have cauged
carry out of high order
stage of ALU)

M8962
M8964

TROUBLESHOOTING

Table 3-2

Fatal Microprocessor Errors (Cont)

Error
(PC counter)
1761

UTSTM

Test Error Description

Probable
Module

Failure of ones (not Z)

MB962

test - the Z bit was set
even though result of

M8964

last operation was non-

zero

1762

UTSTM

Failure of write/read

external test -

M8964
M 8962

unsuccessful attempt to

write and read an

external register (the PC
buffer)

Failure of register

1763

M8962

address/data test - each
internal register written
with its own number,
but gave discrepancy
when read back

1764

UTSTM

Failure of register test 2

~ each register written

M8962

M8964

with complement of its
own number, but gave

discrepancy when read
back

1765

UTSTM

1766

Failure of add

M8962

arithmetic function

M8964

UTSTM

Failure of ASUB test

M 8962

1767

UTSTM

Failure of BSUB test

1770

UTSTM

Failure of shift test -

unsuccessful attempt to
shift (rotate) data left or

M 8964

M8962

M8964

M&962

M 8964

right

1771

UTSTM

Failure of logical

operands test (AND,

OR, NAND, XOR, etc.)

1772

STAKM

Failure of stack parity

test — bad parity written
into the stack, but stack
parity error not detected

M8963

M8964

M8963

TROUBLESHOOTING

Table 3-2

Fatal Microprocessor Errors (Cont)

Error

(PC counter)

1773

STAKM

Probable
Module

Test Error Description

Failure of stack

M8963

underflow/overflow test
- attempted to push
data on stack past
location 77 (overflow)
or pop data off stack
past location zero
(underflow), and did not

get error (or attention
condition)

1774

STAKM

Failure of stack address

M8963

data test — some
location(s) of stack do

not contain correct data
after being written
1775

STAKM

1776

STAKM

1777

STAKM

Failure of capstan bus
data-wrap test - data
written into light

G159
M8963

cable

Failure of CBUS branch
condition test

M8963

Failure of limit
attention flag - limit
attn was enabled, and
status of limit switch
does not agree with
corresponding position
in attention register

CBUS

MB8963

TROUBLESHOOTING

3.5.2

Non-Fatal Errors

Errors are identified by CLK STP off and operator
panel light values from 100-337 (octal). Table 3-3 lists
error code, error description, the module that probably
failed, and scope loop.
NOTES
This error table is valid when in-line or

initialize microdiagnostics are running.
If off-line tests were being run see OffLine Test Errors.
To scope ioop these tests, enter maintenance mode (on-line switch to off posi-

tion, maintenance switch up, press
RESET). Enter the off-line test number
(see the scope loop column in Table 3-3)
in the operator console lights, and press
the on-line button. The test will loop until
the on-line switch is returned to the offline position and errors are displayed

continuously.

Table 3-3

Non-Fatal Microprocessor Errors
Scope

Error Test

(Operator

Error

Probable

Loop
(Test

panel)

Description

Module

number)

M8967

337

Opera-

Capstan runaway

tional
Code

error (G159),
capstan did not stop
within acceptable
window after last

command

100

10TSM

Basic I /O micro
failure (parity error,

IOATN,
handshaking, and

data window test
between [/O and
main micro

NOTE: Can also be
caused by the serial
bus .SHIN (shift in)
stuck asserted

TROUBLESHOOTING

Table 3-3

Non-Fatal Microprocessor Errors (Cont)
Scope

Error Test

(Operator
panel)
101

IOTSM

102

IOTSM

103

[OTSM

Loop

Error
Description

Probable
Module

Errorinl/O

M8966

control register test

M8967

Failure of frame

M8966

counter test

M8967

Failure of I/Osilo

M8966

non-parity error

M8963

data test or write

M8967

(Test
Number)
15

flag
104

I0TSM
|

Failure of I/Osilo

M8966

parity error testor

M8967

data late test
105

IOTSM

Failure of shift loop

M8965

~ MB8965

with zeros

106

IOTSM

Failure of shift loop
with ones

107

10OTSM

110

IOTSM

Failure of shift
length mux

Failuretoreceive
correct operating

code from TS11
when responding to

data sent over

SBUS cable mother
board the serial bus
111

CATSM

Failureof1 kHz
clock test, also test

CBUS

tach sync flop

cable

G159

M8963

112

CATSM

Light register

G159

3.4

G159

changed when
motion register

cleared
113

CATSM

FWDorMVGbits
wrong after | tick of
simulated

command, and tach
pulses

TROUBLESHOOTING

Table 3-3

Non-Fatal Microprocessor Errors (Cont)
Scope
Loop

Error Test

(Operator

Error

Probable

(Test

panel)

Description

Module

Number)

Failure of simulated

G159

3,4

G159

3,4

G159

3.4

G139

Failure of write

M8929

board to turn on

M8966

114

CATSM

capstan speed test,

speed counter was

out of range when
tape motion at
speed was simulated
115

CATSM

Failure of simulated

slow capstan test,
speed counter did

not latch up with
maximum count
when slow tach

ticks were simulated
116

CATSM

Failure of simulated
capstan

deceleration test,
counter not zero for

forward or 377 for

reverse while
decelerating, or
MVG Bit NCT |
117

CATSM

Failure of moving

flop to go to zero

after stopping
(direction reversal
for one tach tick)
120

PETSM

and empty silo, or
data late bit does
not work
121

PETSM

Failure of write

M8922

board to empty silo
at correct speed

124

PETSM

Formatter flag does

M8922

not work on M8922
125

PETSM

Formatter silo

filling and data
error

24
'

M8922

TROUBLESHOOTING

Table 3-3

Non-Fatal Microprocessor Errors (Cont)

Scope

Error Test

(Operator
panel)

Error
Description

126

Peak shift test error

PETSM

Loop

Probable
Module

(Test
Number)

M8924

M8922
M8923

M8924
127

PETSM

Formatter table

lookup ROM
checksum test error

M8922

M8923
M8924

3.5.3
Oftf-Line Test Errors
These errors occur only when running off-line tests.

If
running in auto-sequence mode the failing test is
displayed first. This failing test can be entered to run
in
standalone mode. The resulting error code in the
oper-

ator panel describes the failure and the module
that

probably failed. Section 3.5 explains how to run

off-line
tests. Table 3-4 lists the failing test, operator panel in-

dication, error description, and probable cause. (The
asterisks (*) indicate customer confidence tests,
Table 3-4
Errors

Test

Customer Confidence or Maintenance Mode Test

Operator

Number

Panel

and

Error

Scope

Indication

Loop

(octal)

Various

Error Description
Indicates failed test

See Failed Test

number

description

| msec capstan
clock off speed

Mother board

TAC sync flop; or
TACATTN

Probable Cause

M8963, G159,

signals not
working
3-4

112

Operator panel

affected by WRT
CLR to MOT,
REG

G159

TROUBLESHOOTING

Table 3-4

Customer Confidence or Maintenance

Test
Number
and
Scope

Operator
Panel
Error
Indication

3-4

113

3-4

Error Description

Probable Cause

MVGor

G159

114

SPD REG out of

G159

3-4

115

SPD REG wrong
(slow speed)

G159

3-4

116

SPD wrong

G159

3-4

117

MVG not set

G159

Loop

Mode Test Errors (Cont)

(octal)

FWD/REY flop
not okay

tolerance (on
speed)

(deceleration)

during
deceleration

G158, G159

With reel motors

Reel Motor

off; reel motors on

signal was one

G158,G159

Reel motors on;

]

Reel Motor

reel motor signal
was zero

7-10*

Phase angles

confused

G159, Capstan

assembly
motor

7-10%

Phase exceeded

G159, Capstan

limit

assembly or
motor

11-12%

Capstan speed too

G159

11-12%

Capstan speed too

G159

13%

fast

slow

REYV over shoot,

too many ticks to

G159, G158

stop REV

13*

REV under shoot,

too few ticks or

bounced back

G159, G158

TROUBLESHOOTING

Table 3-4

Customer Confidence or Maintenance

Test
Number
and

Operator
Panel
Error

Mode Test Errors (Cont)

Scope

Indication

]13*

(octal)

Loop

Error Description

Probable Cause

FWD over shoot,

G159,G158

too many ticks to
stop FWD

FWD under shoot,

G159,G158

1/0 Micro step,

M8967, M8963

IOCNO register

M8967

13%*

100

101

102

Frame counter test

~ M8966

103

Silo good parity

M8966, M8963

104

Silo bad parity,

MB8966

105,

1/0 loop around,

M8965

106

too few ticks or
bounded back

1/0

test

data-flag

data late

Zeros

1/0 loop around,

M8965

ones

107

110
120

1/0 loop around,

shift length MUX

Serial bus/TS11

M8965

M8965,

alive

M7982,

1/0 silo not being

M 8929, M8966

clocked by write

Mother board

board

121

WRT BD silo

M8929

124

FMTFLG in

- M8922

CLK out of range
FMTCNTL REG

test

TROUBLESHOOTING

Table 3-4

Customer Confidence or Maintenance
Mode Test Errors (Cont)

|
Test

Operator

Number

Panel

and

Error

Scope

Indication

Loop

(octal)

Error Description

Probable Cause

125

PE FMT mode,
data, silo

ME922, 23, 24,
G157

126

PE FMT early/late
bit shift test

M8922, 23, 24,
G157

127

PE FMT table
loop up ROM
checksum test

M8922

Skew limit too

M8923

loose, turn R49,
M8923 CCW
31

Skew limit too

tight, turn R49,

MB8923

M8923 CW

32%

Head, M8929,
G057

32%

200

Track active data

Erase-head

error

34-35

100

Data timeout if
data expected, TST

G057, M8922

32, 34, noise when
no data expected,

TST 33, 35-40

36%*

Byte count error

Head

37*

Track inerror, 10

Head

Is parity track

40%

41-45% -

51-54

Head

200

100

Fatal error, limit

Head

exceeded/no data

threshold adj.

Data error, VCO

M8922.
M8924, M 8929

lost sync

threshold ad;.
40

Tape mark seen

M8922,
M8924, M8929

threshold ad;.

A
%

TROUBLESHOOTING

Customer Confidence or Maintenance
Mode Test Errors (Cont)

Table 3-4

Test

Operator

Number

Panel

and

Error

Scope

Indication

Loop

(octal)
20

Error Description

Probable Cause

Data error VCO

M8922,

still synced

M8924, M8929

threshold ad;.

Reverse skew error

Head, tape
path

Forward skew

Head, tape

error

path

200

Reel motors on

Switches

100

.
On-line switch
(lights ONL)

Sensors
Reel Motor

Limit switch ex-

ceeded, latch set
limit switches
light UOK)

(all

Load switch in

(load switch lights
VCK)

Enter zero switch

in (EOT switch
lights DCK)

Write lock lever

out WRT Locked

(Write lock lever
lights WLK)

BOT latch set

(BOT sensor lights
BOT)

EOT latch set
(EOT sensor lights
EOT)

NOTE

Test 57 loops on itself. The loop is broken by pressing
the maintenance panel reset button.

TROUBLESHOOTING

3.6

HOW TO RUN MICRODIAGNOSTICS

3.6.1
Internal Microdiagnostics (Inline)
These tests run by themselves when the transport is idle

for more than 500 milliseconds. They cause fatal and
non-fatal errors.
3.6.2

Internal Microdiagnostics (Initialization)

These tests are a superset of inline diagnostics, and test
more logic. They are initiated by a power-up, maintenance panel reset, subsystem init or UNIBUS init. They

cause more fatal and non-fatal errors.
3.6.3

Off-Line Microdiagnostics (Customer Confidence

and Maintenance)
A

write-enabled

loaded

the

standard

amplitude

transport.

Set

the

tape

must

maintenance

mode/normal switch on the maintenance panel to maintenance mode. The operator panel now operates in

maintenance mode with the on-line switch out. Enter the

off-line test in the operator panel (in octal notation).
(The left most switch puts a one in LSB and the right
most switch puts a zero in LSB. The value shifts left

after each entry.) Test 1 is auto-sequence mode; tests 2
through 47 run consecutively. The on-line switch is now
a start/stop switch. Press the switch to latch it in and the
selected test will run; press it a second time to release it
and the test will stop. A new test can be selected whenever the start/stop switch is in the stop position. Successful completion in auto-sequence mode is shown by a

rotating pattern in the operator panel (only when connected to a TS11 with power applied). Exit to normal
operations by placing the maintenance mode/normal

switch in the normal position and replace the scratch
tape.

3.7

CUSTOMER CONFIDENCE CHECK

The customer confidence test is a sub-set of off-line
tests. It can run without going inside the cabinet and
setting the maintenance switch. The test is designed to
be run by the operator to verify the drive. A Field Service standard amplitude tape must be loaded (load light
on), off-line, and write-enabled. Push both the LOD and
EOT panel pushbuttons together. The display now

shows 300 indicating the customer confidence tests will

run as soon as you push the on-line switch on. If a test

fails, the test number will flash in the lights. If all tests
pass, the lights display a rotating pattern. To return the

drive to normal operation at any time, push the on-line
switch again so the switch is released.

TROUBLESHOOTING

OPERATING INSTRUCTIONS
BASED DIAGNOSTICS

3.8

FOR

PDP-11

Load XXDP+ monitor

Enter date

Answer hard core questions

50 HZ? Y or N

LSI? Y or N

This is XXDP+. Type H or H/L for details
(help file).

[Receive XXDP+ prompt.(dot)]

Enter R (space) program

The program is CZTSI or CZTSH etc.

The operator entry should look like this:
[.R CZTSI]
Receive DR> prompt.

Enter the appropriate command. For example,
DR
> STA for start.

6. Change HW (L) ?

Change SW (L) ?
NOTE

Refer to the diagnostic listing for specific pro-

gram problems.
3.8.1
Test 1

Test 2

Test 3

Test 4

Test 5

3.8.2
Test 1

Test 2

Test 3

Data Reliability Program Tests

Basic functions
Data reliability

Write compatability /write utility
/read utility
Read compatability
Operator selected sequence

Control Logic Program Tests
PDP-11/TS11 wrap test
PDP-11/transport wrap test

Set character check

TROUBLESHOOTING

Test 4

Tract active/inactive test

Test 5

PE data test

Test 6

PE skew test

Test 7

Dead tracks test

Test 8

ROM look-up table test

Test 9

Inline microdiagnostic test

Test 10

INIT microdiagnostic test

3.8.3

Program Control Flags

HOE

Halt on error, causing CMD mode to be entered when error

LOE

Loop on error, causing diagnostic to loop

continuously within smallest defined block of
coding (segment, subtest, or test)
IER

Inhibit error reporting

IBE

Inhibit basic error reports

IXE

Inhibit extender error reports

PRI

Direct all messages to line printer

PNT

Print number of test being executed

BOE

Bell on error

UAM

Run in unattended mode, bypassing manual
intervention tests

ISR

Inhibit statistical reports

IDU

Inhibit dropping of units by diagnostic

3.8.4

Hardware Parameters
The following are base address and vector assignment
default parameters.

TSSR ADDRESS (172522) ?
VECTOR (224) ?

Example of

commands:

STA/TES:2/FLA:1DU:LOE

Example

meaning:

Start test 2, inhibit
dropping unit and loop on error

TROUBLESHOOTING

3.8.5

Software Parameters (Data Reliability Program

Only)

Refer to diagnostic listings.

3.9 SPECIAL TECHNIQUES
The special procedure explained here should be followed
to bring up the system when it is ‘“dead in the water”.

When nothing else works (tape cannot be loaded or microdiagnostics run) and the power is okay. One of the
modules that makes up the microprocessor or control
read only memory (CROM) is not working, or a module
that hangs on the microprocessor buses is hanging the
bus.

Hardware and microcode are structured so that all modules except the main micro and main ROM board can be
removed from the system and then added one by one
until a failure occurs. The diagnostic senses the modules
as they are added and expands the test loop to encompass the new boards functional. Perform the following
initial set up procedures.
1.

Power off.

Remove all PC cards in the logic rack except
M8962 (microprocessor) and M8964 (PC and
ROM 1).

3. Remove the cable from J-2 on backplane. This disconnects G159 (capstan servo board).

4. Remove the cable from J4 on backplane (disconnects TS11 UNIBUS Interface Card M7982).

5. Place the maintenance switch in the normal position, the enable error switch to enable and the halt
switch to run.

Starting with only the M8962 and M8964 installed, per-

Power up.

form the following test sequence procedure.

Wait 20 seconds.

Press the reset button on the maintenance panel.

Table 3-5 lists the correct contents of the maintenance panel and operator panel displays. If the display differs, the last module added is bad.

TROUBLESHOOTING

Table 3-5

Bring-Up Procedure Errors
Front

Maintenance Panel

Panel

CLK

Lights

CROM PC

Add

STOP PERR

(octal)

M8962,

off

377(777) ?

M8968

off

377(777) ?

Loop basic micro
test
Loop basic micro

M8963

1775

Control bus test

G159 cable

off

1037

100

Basic IC test

M8967

off

1037

102

M8966

Frame control test

off

1037

103

I/0 silo test
Serial bus wrap test

(octal)

M8964

Comment

test

J2 on
backplane

M8965

off

1037

110

M7982

off

1037

120%*

M8929

off

Write board/silo test

off

1037

124

PE FMT flag test

M8922 and

off

1037

125

PE silo test

off

Micro

System up

interconnect

jumper

M8923,

M8924,

okay

G157

(VCK OK)

VCK light on

*110 if host CPU power off,

If all display indicators are correct,
Power off.
Insert the next card listed in the add column of

" Table 3-5.

Go back to step 1 and continue testing.
3.9.1
Dead Track Card Identifier
Table 3-6 shows which card is bad for each dead track.

TROUBLESHOOTING

Table 3-6

Dead Track/Module Locations

Dead

Head

Track

Bit

Slot/Card

2 =G157

2 =GI157

1 = G157

1 =GI157

1 = G157

2 =GI157

100
200
400

6
7
P

6
7
4

2=G157
1 = G157
3 = M8923

REMOVAL AND

REPLACEMENT

This

chapter provides removal or replacement procedures for parts listed in the spares kit list. Complete
procedures for all replaceable parts are found in the
TS11 Technical Manual.

4.1
SPECIAL PROCEDURES
= Several pieces of the spares kit require no special removal or replacement techniques. Except where noted,

no adjustment is required after replacement. Normal
safety precautions should be followed. One module

(G158 Reel Servo board) has line voltage exposed on its
surfaces. Always remove power when replacing parts on
this unit. The following spares require no special procedures.

‘e Pico Fuses (DEC P/N 12-05747) - Refer to Figure
1-6.

Maintenance Panel LED (DEC P/N 11-10324) Refer to Figure 1-5.

Maintenance Panel Switches
Toggle (DEC P/N 12-09590) ~ Refer to Figure

1-5.

Pushbutton (DEC P/N
Figure 1-5.
e

12-11079) - Refer to

Limit Switch (DEC P/N 70-15666) ~ Check tension

arm mechanical adjustment (Figure 4-1).

e QOperator Panel Light (DEC P/N 12-12716-01) General Electric #73 (Figure 1-3).

e QOperator Panel Lights Covers - (Paragraph 1.6)
Refer to Figure 1-3.

REMOVAL AND REPLACEMENT

4.2

MODULE REPLACEMENT

Table 4-1

lists adjustments to be checked and per-

formed, as needed, whenever a module is replaced. The
adjustments are found in Chapter 5.

Table 4-1

Module and Adjustment Number

Replaced

Adjustment

Module

To Perform

M7982

See installation section

Set address and vectoer switches
M8922

V.C.O.

M8923

Threshold; skew

M8924

M8929

M8962

M8963

M8964

M8965

M8966

M8967

M8968

G057

Preamplifier amplitude

G157

G158

Set S1 for appropriate frequency
{check adjustment tension arm)

G159

Capstan null

Capstan deceleration

*None

4.3 OPERATOR PANEL - (G159 BOARD)
This panel is an integral part of the G159 module. If
necessary, replace G159 and perform the adjustments
shown in Table 4-1. Test switches by using off-line test
57.

REMOVAL AND REPLACEMENT

4.4 BOT/EOT SENSOR (DEC P/N 12-11720-00)
When replacing a new sensor ensure that its face 1s parallel with the tape path.

4.5 CAPSTAN WHEEL (DEC P/N 74-18010)
The following procedure describes capstan wheel removal and replacement. A capstan clamp (DEC P/N

74-18021) may be necessary to perform this procedure.
4.5.1

Capstan Wheel Removal

Use the Allen wrench to loosen the capstan clamp
at the rear of the capstan wheel.

Once loose, pull forward until the wheel is free.

4.5.2

Capstan Wheel Replacement

Carefully place the new wheel over the capstan motor shaft. Align the wheel flush with the capstan
motor shaft.

Holding the wheel firmly in place, tighten the capstan clamp with the Allen wrench. Check tape path
alignment and tape tracking.

4.6

FIXED REEL ASSEMBLY

The following procedure describes fixed reel assembly
removal and replacement.

NOTE
The

fixed

reel

assembly

(four

pieces:

rear

flange, inner hub, front flange, and trim piece)

fits against a hub adapter. This adapter should

not be removed for normal servicing. A special
gauge is provided in the spares kit to check the
hub adapter height.
4.6.1

4.6.2
1.

Fixed Reel Assembly Removal

Remove three Phillips head screws and carefully
slide all four assembly pieces forward.
Fixed Reel Assembly Replacement
Assemble all four pieces on the hub adapter indi-

vidually, and align the screw holes as you go.
2.

Insert screws and tighten progressively in a clockwise sequence.

REMOVAL AND REPLACEMENT

4.7

SNAP LOCK HUB ASSEMBLY (DEC P/N 12-

13119)

The following procedure describes snap lock hub assembly removal and replacement.
NOTE

This assembly fits against a hub adapter. The
hub should not be disturbed to remove or replace
the snap lock hub assembly or bezel. A special
gauge (hub height tool DEC P/N 96-07951) is
provided in the spares kit to check hub adapter
height.

4.7.1

Snap Lock Hub Assembly Removal

Lift the locking tab and remove the index screw.

Rotate the outer hub counterclockwise to unscrew
the hub from the hub adapter.

4.7.2

Snap Lock Hub Assembly Replacement

1. Carefully thread the snap lock hub clockwise onto
the hub adapter until fully seated with the snap
lock open.

2. Back off the hub counterclockwise until the snap
lock closes smoothly.

3. Use several reels of tape to check for smooth and
firm snap lock action.

4. Locate the nearest index screw hole through the
hub and reinstall the index screw.

4.8

LOWER ROLLER ASSEMBLY (FIXED

ROLLER, DEC P/N 12-16060)
The following procedure describes lower roller assembly
removal and replacement.

4.8.1

Lower Roller Assembly Removal

1. Remove capstan wheel (Paragraph 4.5.1).
2.

Remove fixed reel assembly (Paragraph 4.6.1).

3. Remove snap lock hub assembly (Paragraph 4.7.1).
4 . Remove bezel covering the casting by removing
seven screws from the rear of the casting (Figure 41).

REMOVAL AND REPLACEMENT

CAPSTAN POWER AMP
UPPER ARM
G159-CAPSTAN SERVO

LIMIT

AND OPERATING PANEL

SWITCHES

CAPACiTORl\fit“D?/
”“D

UPPER

—

—1

UPPER SPRING

¢ | ADJUSTMENT SCREW

il |

REEL MOTORTM |

——— G057 PREAMP
.é.

G158

REEL SERVO

A" Jme—
| LOWER SPRING

BOARD

’

e
\

CAPACITOR

LOWER

ADJUSTMENT SCREW

4 >~ CAPSTAN MOTOR
AND TACH ASSY.

LOWER ARM

REEL

LIMIT

MOTOR

SWITCHES

4 = BEZEL SCREWS (7)

Figure 4-1

M A-4006

Deck Plate Assembly (Rear View)

Remove two screws from the roller assembly in
front.

Lift out roller assembly.

4.8.2

I.
2.

Lower Roller Assembly Replacement

Screw new roller assembly in place with two screws.
Replace bezel by fastening seven screws in the rear

of the casting (Figure 4-1).
3.

Replace snap lock hub (Paragraph 4.7.2).

Replace fixed reel assembly (Paragraph 4.6.2).

Replace capstan wheel (Paragraph 4.5.2).

Verify tape
(Chapter 5).

tracking

and

tape

path alignment

4.9 UPPER ROLLER ASSEMBLY
This roller is part of the head assembly DEC P/N

7013514, If it fails, the head assembly must be replaced
.
Those procedures are found in the TSI Technica
l Manual.

REMOVAL AND REPLACEMENT

4.10

TENSION ARM ASSEMBLY (DEC P/N 17-

14014)

The following procedure describes tension arm assembly
removal and replacement.

4.10.1

Tension Arm Assembly Removal (upper or lower)

Remove capstan wheel (Paragraph 4.5.1).

Remove fixed reel assembly (Paragraph 4.6.1).

Remove snap lock hub assembly (Paragraph 4.7.1).

Remove bezel by unfastening seven screws from the
rear of the deck plate (Figure 4-1).

While holding the tension arm spring loosen and
remove the tension block screw. Remove the ten-

sion spring from the transducer cable (Figure 4-1).

Unhook the transducer cable from the pin in the
pivot arm housing.

Unscrew the three holding screws from the front of
the deck plate and remove the arm assembly

through the back of the deck plate.

4.10.2
l.

Tension Arm Assembly Replacement

Insert the new arm assembly into place through the
rear of the deck plate. Ensure the opening in the
pivot arm housing points to the tension block as-

sembly (for the transducer cable), then secure with
three screws.

Place the arm in a vertical position and attach the
transducer cable to the pin in the pivot arm housIng.

Prepare the tension block assembly by having the
adjusting screw in place and ready to attach when
spring tension is applied.
Attach the spring and adjust the tension screw several turns.

Adjust course spring tension using the procedure in
Chapter 3.

Replace the bezel by fastening seven screws in the
rear of the deck plate (Figure 4-1).
.

Replace snap lock hub, fixed reel assembly, and
capstan wheel (Paragraphs 4.7.2, 4.6.2, and 4.5.2).

REMOVAL AND REPLACEMENT

Perform fine tension arm adjustment.

Check tape path alignment and tape tracking.

ACINPUT/LINE FILTER BOX
special techniques to remove or replace the ac in-

:/line filter box are needed. This is the only change
r ac input voltage modification. Use Table 4-2 to se¢t the proper parts.

Table 4-2 123";‘\//240\1 AC Input Part Numbers
Voltage

Line Filter

Cord

120V

DEC P/N 70-16287-00

DEC P/N 70-16295-00

240 V

DEC P/N 70-16287-01

DEC P/N 70-16295-01

ADJUSTMENTS

5.1

QUICK REFERENCE ADJUSTMENT

SPECIFICATION

Table 5-1 provides a quick reference to the various TS11
adjustment specifications.

Table 5-1 Adjustment Specifications

Test Points

Parameter

Specified Value

SUPPLY VOLTAGE

(At motherboard)

5.0t05.2Vdc

J5-7 to ground

+15V
Noise

14.5 to 15.5 Vdc¢
<300 mV

J5-3 to ground
(adjust power line

-15V

-14.0 to -16.0 Vdc J5-11 to ground

Noise

Unregulated

Supply
Noise

<300 mV

(adjust H744)

monitor/15V
regulator R24)

<300 mV

No adjustment

+15 to +23 Vdc
<300 mV

J2-3 (G159)+15V
J2-4 (G159)-15V

to ground

TACHOMETER
Duty cycle

(FWD) 01
02

Phase shift

45%~ 55%
45% ~ 55%

(FWD + REV)

81%-99%

CAPSTAN NULL

-0.1 to +0.1 V

G159-Pin3 E29
G159 -Pin 5 E29

Red lead of capstan

motor to ground
(R26 on G150)

ADJUSTMENTS

Table 5-1 Adjustment Specifications (Cont)

Parameter
TENSION (COURSE
ADJUSTMENT)
Lower arm
Before fine
adjustment

Specified Value

Test Points

435 to 450 gm
385 to 415 gm

Upper arm

400 to 425 gm

After fine

400 to 425 gm

adjustment

HUB HEIGHT

Upper

Lower
CAPSTAN POSITION
ON SHAFT
LIMIT SWITCHES

(Use hub tool)

DEC P/N 96-07951

Filush with end
of motor shaft
Does tension arm
actuate switch

TENSION ARM
CENTERING

UPPER

Approx. center

Test 11 (forward)

of swing

Lower

Approx, center
of swing

Test 12 (reverse)

Arm to limit
Switch distance

2 to 2.5 cm
(0.75 to 1.0 in)
running Test 50

Test 50

EOT/BOT SENSOR
Sensor position

|
Parallel to tape

Marker voltage
BOT off
BOT on
EOT off
EOT on

>1
<3V
>1V

TAPE PATH

See procedure

ALIGNMENT

<3V

Tape centered on
capstan

No tape in and out
position change
with tape motion

on G159

BOT, Pin § El
EOT, Pin 7 El

ADJUSTMENTS

Table 5-1 Adjustment Specifications (Cont)

Parameter

Specified Value

Test Points

(forward and
reverse)
No tape puckering
at roller

FINAL TENSION
ADJUSTMENT

See procedure

SPEED TEST

Forward

242.5 to 257.5 us
less than 5 us

G159 Pin 3 E29
(Test 11)

242,5 to 257.5 us
less than § us

G159 Pin 3 E29
(Test 12)

Forward

Operator panel
lights flicker
equally

Test 13
(R87-G159)
Forward

Reverse

Operator panel

(R95-G159)

SKEW METER
CALIBRATION

No operator panel
lights lit in test

:
Test 31
(R49-M8923)

PREAMP
AMPLITUDE

See following

Maintenance panel
Analog

Read after write

9.75 to 10.25 VPP RDO-RDP (Test 54)

Period
Jitter

Reverse

Period
Jitter

CAPSTAN
DECELERATION

amplitude

lights flicker
equally

Reverse

All lights out

With master output
tape

Preamble

(3200 FCI)

Read after write

>16.7 VPP

amplitude

Data (1600 FCI)
Read forward

amplitude

>90% of above

Test 51

Within £15% of

Test 52

value

Data (1600 FCI)
Read reverse

amplitude

Data (1600 FCI)

above value

ADJUSTMENTS

Table 5-1 Adjustment Specifications (Cont)

Parameter

Specified Value

Test Points

THRESHOLD
(DURING DATA)

0.9 to 1.1 Vfrom
ground

Channell Pin
A3A1l on
backplane
Channel 2 Pin
RDO on
maintenance panel
Test 54 with
master output

VCO
Level shift (dc)
between data and
no data

tape

Minimal

Test 54 with
master output

tape VCO TPI on

M8922 and RDO

SKEW
Forward
Reverse

‘

<25V
<3.0V

Skew analog
Test 51
Test 52 (use

COMPLETE

“Jackpot” in

Test 1 (auto

NOSTICS

Lights

master skew tape)

MICRODIAG-

operator panel

sequence

5.2
ADJUSTMENT PROCEDURES
The following procedures describe the correct way to
perform various TS11 adjustments.

5.2.1

Tension (Course Adjustment)
Refer to Figure 5-1 when performing this adjustment.

I. Power down the system.
2.

Using a one-foot length of tape with loops at each
end, attach a force gauge to the upper arm as

shown. Place the tape between the upper fixed
guide and the upper roller guide. Pull the arm in the

direction shown to the approximate center of its
swing. Take care that the force gauge has been ze-

roed. Adjust the upper spring adjustment screw on
the back of the deckplate until the gauge reads 400
gm +15 gm.

Using the same one-foot length of tape, attach the

force gauge to the lower arm as shown. Place the

tape between the capstan and the lower roller
guide. Pull the arm in the direction shown to the

approximate center of its swing. With the gauge
properly zeroed, adjust the lower spring adjustment
screw on the back of the deckplate until the gauge
reads 450 gm - 15 gm.

ADJUSTMENTS

HEEEREEN

MA-3996

Figure 5-1

5.2.2

Tension Arm Adjustment

Tape Path Alignment Adjustment

Remove the upper and lower fixed guide reference edge
capture washers, and press against the spring loaded
washers (Figures 5-2 and 5-3).
1.

Perform maintenance test 11, with a work tape
loaded that is known to be good. Ensure the tape
has no edge damage.

Adjust gimbal screw no. 2 (Figure 5-2) until the
tape rides in line with both the upper and lower
fixed guide reference edge (Figure 5-3).

Perform maintenance test 50 and adjust gimbal
screw no. 1 (Figure 5-2) until there is no visible difference in tape position on the capstan.

Continue maintenance test 50. Repeat adjustment

of both gimbal screw no. 2 and no. 1 until the tape

~ rides in line with the fixed guide reference edges
and maintains a stable position on the capstan.

ADJUSTMENTS

CAPSTAN
GIMBAL

GIMBAL
SCREW #1

CAPSTAN /

]

GIMBAL

SCREW #2
MA-3986

Figure 5-2

Capstan Gimbal Adjustment

HEAD
DIE-CASTING

SPRING-LOADED
CERAMIC WASHER
. GUIDE

SPRING
WASHER

HOLD DOWN
SCREW

(5 IN. LBS.)
CLAMP WASHER

CAPTURE
WASHERS
SPRING

SPRING-LOADED

CERAMIC WASHER

GUIDE

HEAD
DIE-CASTING

REFERENCE

EDGE

Figure 5-3

Tape Path Guides

MA-4002

ADJUSTMENTS

Ensure no tape puckering occurs at the roller
guides and that the tape is not rubbing against the
.
reels.

6. Stop the maintenance test. Carefully replace the
capture washers, the beveled edge of the ceramic
(brittle) washer facing the tape, and tighten to 5 in
Ibs. Release the spring loaded washers.

7. Perform maintenance test 50 again and check that
the results have not changed; repeat all previous
steps if necessary.

5.2.3

Final Tension Adjustment

1. Connect an ammeter in series with the capstan motor.

2. Adjust the tension spring so that the current is
equal for forward and reverse tape motion (Figure
4-1).

3. For forward tape direction, adjust upper spring.
4. For reverse tape direction, adjust the bottom
spring.

5.2.4

Speed Test

Measure speed in the maintenance mode with tape
loaded. Monitor Pin 3 E 29 of G159 (tach phase 01).
Set the oscilloscope in the following manner.

Channel 1

10 V/cm

Vertical Coupling

Horizontal
Trigger

50 us/cm
Channel 1, Normal,
Positive Slope

Run test 11 (forward) and verify there are no operator panel lights on. Otherwise, perform a tachometer adjustment.

Measure the period of the signal to be 250 us +3
percent. Jitter, measured from the same edge from
which the scope is triggered, should be less than 2
percent (Figure 5-4).
Run test 12 (reverse) and verify the same measurement.

5.2.5 Preamplifier Amplitude Adjustment
Perform maintenance test 54 with a master output tape
loaded.

ADJUSTMENTS

CHECK FOR 243 us-257 us

ADJUST TO 118 us-131 us—#
JITTER

TIME BASE

50 us/cm
MA-3997

Figure 5-4

Capstan Speed Adjustment

Remove the preamplifier board shield and attach a
scope probe to TPO (Figure 5-5).

Adjust the bit weight zero gain pot (Figure 5-5) for
10 Vp-p = .25 V in the preamble portion of the
analog signal on the scope (Figure 5-6).

Move the scope probe to the remaining test points

and adjust the corresponding gain pots, including
test point TPP (Figure 5-6).

Ensure the data portion of signals TPO through
TP7 does not exceed 16.7 Vp-p (Figure 5-6).

Stop the maintenance test, remove the scope probe,
replace and secure the board shield, and tighten to
6 in. 1bs.

5.2.6

Threshold Adjustment

Measure in the maintenance mode with a master output

tape loaded.
Set the oscilloscope in the following manner.
Channel 1

5V/cm

Channel 2
Vertical coupling

1 V/cm

Horizontal

2ms/cm

Trigger

Channel 1, Normal,

Mode

Alternate

Positive Slope

Channel 1 — monitor RDO of the maintenance panel
Channel 2 — monitor Pin A3A1 of the backplane
1.

Run test 54 and verify Pin A3Al1 is 1V = .1V

during the data portion of the analog signal (Figure
5-7).
2.

Adjust the top potentiometer (R46) of M8923 if

needed.

R9?2

o TF7

|rso|

TP6

TP5

TP4

TP3

TP2

TP1

TpPO

TPP

'Il

ADJUSTMENTS

—

’

BIT

GAIN

TRACK

WEIGHT

POTS

WEIGHT

MA-3984

Figure 5-5

Read Preamp Locator

5.2.7 V.C.0O. Adjustment
Measure V.C.O. in the maintenance mode with a master
output tape loaded. Set the oscilloscope as shown in
Paragraph 5.2.6.

Channel 1 — RDO on the maintenance panel
Channel 2 — V.C.O. T.P. on M8922
1.

Run test 54. Adjust the potentiometer on M8922

for minimal level shift (dc) between data and no
data portions of the signal on Channel 2 (Figure 5-

7).

ADJUSTMENTS

TEST POINT SIGNAL (TPO-TP 7)
POSTAMBLE

DATA

PREAMBLE

SCOPE CHAN. 1

16.7V P-P

TIME- 5ms

SCALE 5V/cm
LF REJ
AUTO TRIG

TEST POINT SIGNAL (TP-P)

DATA

PREAMBLE

}

10V P-P

| POSTAMBLE

}

§
i

|
MA-3980

Figure 5-6

Read Preamp Adjustment

Skew Meter Calibration

5.2.8

To calibrate the skew meter run test 31 and adjust the
lower potentiometer (R49) on the M8923 until operator
panel lights 0 and 1 stay out.
NOTE

There is considerable lag between adjustment of
the potentiometer and an updated display.

5.2.9

Head Skew Adjustment

Measure head skew in the maintenance mode with a
master skew tape loaded. Set the oscilloscope in the following manner.

Channel 1
Vertical Coupling
‘Horizontal

Trigger

1 V/cm
dc
Sms/cm

Channel 1, normal,

positive slope

ADJUSTMENTS

PREAMBLE

ANALOG

\V DATA V/

POSTAMBLE

NO DATA

REFERENCE

PIN - RDO

_..1:::

TIME- 2 ms/cm
SCOPE CHAN. 1 l”l

(MOTHER

VVWWWW WY

SIGNAL

GAIN-

1V/cm

V.C.0O.

- —

BOARD)

SCOPE
e

CHAN.2
PIN-

—_—

TP1:2

THRESHOLD
SIGNAL
GAIN-

1V/em

v _——L_-l

SCOPE

CHAN. 2

—

PIN- A3AT1
(MOTHER

BOARD)
MA-3982

Figure 5-7

Threshold and VCO Adjustment

Channel 1 — Skew out testpoint on maintenance panel.

Run test 51 (forward). Adjust the head azimuth
(Figure 5-8) screw for minimum output. It must be
2.5 V or less in the forward direction.

Run test 52. Verify that the reverse skew signal is
3.0 V or less.

ADJUSTMENTS

/GUIDE SURFAC
UPPER FIXED

TAPE CLEANER
SURFACE
ERASE HEAD

SURFACE

____ RD/WRT HEAD
SURFACE

HEAD AZIMUTH

T~ ADJUSTING
SCREW

LOWER FIXED
GUIDE SURFACE
MA-3981

Figure 5-8

Head Skew Adjustment

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APPENDIX A

18X

APPENDICES

BUS ADDRESS REGISTER (TSBA)
BUS ADDRESS — {READ ONLY) — TSBA

UNIBUS ADDRESS+0

15114

12}11

09}08

0605

03}02

A15] A14| A13] A12]1 A11| A10| A09]| AO8 | AG7{ AD6] AO5| A04 | AG3§A02| AQT| AQO

NAME

A15
A14
A13
Al12

100000
40000
20000
10000

All

4000

A10

2000

BUS ADDRESS BIT 15
BUS ADDRESS BIT 14
BUS ADDRESS BIT 13
BUS ADDRESS BIT 12
BUS ADDRESS BIT 11

BUS ADDRESS BIT 10

BUS ADDRESS BIT 09
BUS ADDRESS BIT 08
BUS ADDRESS BIT 07

1000
400
200

o9
08
07

A0S
AC8
AO07

AO05

100

BUS ADDRESS BIT 06

AD4
A03
A02
AQ1
AQO

20
10
4
2
1

BUS ADDRESS BIT 04
BUS ADDRESS BIT 03
BUS ADDRESS BIT 02
BUS ADDRESS BIT 01
BUS ADDRESS BIT 00

A0B

04
03
02
01
00

DEFINITION

BIT

15
14
13
12

BUS ADDRESS BIT 05

MA.4008

Bus Address Register

Figure A-2

DATA BUFFER REGISTER (TSDB)
UNIBUS ADDRESS + 0 — DATA BUFFER — (WRITE ONLY) — TSDB

15114

12|11

09108

P15|

P13|

P12

P10|

P09

PO7 | PO6}

BIT

P14

P11{

NAME

POB|

06}05

PO5 | PO4|

03}]02

PO3 | PO2|P17 | P16

DEFINITION

P15

100000

COMMAND POINTER BIT 15

P14

40000

COMMAND POINTER BIT 14

13
12

P13
P12

20000
10000

COMMAND POINTER BiT 13
COMMAND POINTER BIT 12

P11

4000

COMMAND POINTER BIT 11

10
09
08
07

P10
P09
P08
PO7

POB

2000
1000
400
200

COMMAND POINTER BIT 10
COMMAND POINTER BIT 09
COMMAND POINTER BIT 08
COMMAND POINTER BIT 07

05
04
03
02

PO5
PO4
PO3
PO2

40
20
10
4

COMMAND POINTER BIT 05
COMMAND POINTER BIT 04
COMMAND POINTER BIT 03
COMMAND POINTER BIT 02

P17

COMMAND POINTER BIT 17

P16

' COMMAND POINTER BIT 16

100

COMMAND POINTER BIT 06

MA-4009

Figure A-3

Data Buffer Register

APPENDICES

STATUS REGISTER (TSSR)
(UNIBUS ADDRESS
+ 2 — READ ONLY)
5114

SPEIRMRINXMINEA|A17§A16|SSR|OFLY

{UPE|

12|11

09]08

06|05

03|02

FCI{FCO;TC2}

TC1{TCO

S,1
FC2
sla5| 7 | sqas|s | s|]s|s]| 3l7|7]s]s]|s

SC
UPE
SPE

100000
40000
20000

SPECIAL CONDITION
UNIBUS PARITY ERROR
SERIAL BUS PARITY ERROR

RMR

10000

NXM

4000

NON-EXISTENT MEMORY

NBA

2000

NEED BUFFER ADDRESS

1000

UNIBUS ADDRESS BIT 17

A16
SSR
OFL

400
200
100

UNIBUS ADDRESS BIT 16
SUBSYSTEM READY
OFF-LINE

FC1

FATAL TERMINATION CLASS 01

FCO

FATAL TERMINATION CLASS 00

TC2

TERMINATION CLASS BIT 02

TC1

TERMINATION CLASS BIT 01

TCO

TERMINATION CLASS BIT 00

MA-4012

STATUS Register

Figure A-4

RESIDUAL FRAME COUNT REGISTER
RBPCR

C15

01 00

c2jC1|Co

BIT

NAME

C15

1000000

THIS WORD WILL CONTAIN THE OCTAL

COUNT OF RESIDUAL BYTES/RECORDS/

TAPE MARKS FOR THE READ, SPACE

RECORDS, AND SKIP TAPE MARK

COMMANDS. THE CONTENTS ARE
MEANINGLESS FOR ALL OTHER
COMMANDS.

MA-5349

Figure A-5

Residual Frame Count Register

APPENDICES

EXTENDED STATUS REGISTER O (XSTAT 0)
13

15114

12§11

09108

06}05

TMKERLSILET [RLLEWLEINEF | ILC}

ILAIMOT OSNlL

S.2¢

1361

I1E

39S

03)02

|S3|

TMK

100000

TAPE MARK (READ-SPACE/WRITE-SKIP/OTHER

RLS

40000

RECORD LENGTH SHORT

LET

20000

LOGICAL END OF TAPE

RLL
WLE

10000
40060

RECORD LENGTH LONG
WRITE LOCK ERROR

NEF

2000

NON-EXECUTABLE FUNCTION

ILC

1000

ILA

400

ILLEGAL ADDRESS

MOT

200

CAPSTAN MOVING

ONL

100

ON-LINE

|VCK{PED{WLK|BOT|EOT

1s3]S83]S.2

ILLEGAL COMMAND

INTERRUPT ENABLE

VCK

VOLUME CHECK

PED

PE DRIVE

WLK

WRITE LOCK

BOT

BEGINNING OF TAPE

EOT

END OF TAPE

Extended STATUS Register 0

Figure A-6

EXTENDED STATUS REGISTER 1 (XSTAT 1)
15|14

DLT

COR|CRSH TiG |DBF {SCK

12}

09|08

IPR ISYN{

s4] a4 |44

03}02

S4| 4 |s4a|4 |Sa)]4 | 4| 4

DLT

100000

40000

COR
CRS

20000
10000

CORRECTABLE DATA
CREASE DETECTED

DATA LATE ERROR

TIG

4000

TRASH IN GAP

DBF

2060

DESKEW BUFFER FAILURE

SCK

1000

SPEED CHECK

400

IPR

200

INVALID PREAMBLE

SYN

100

SYNC FAILURE

iPO

INVALID POSTAMBLE

IED

INVALID END DATA

POS

POSTAMBLE SHORT

POL

POSTAMBLE LONG

UNC

UNCORRECTABLE DATA

MTE

MULTITRACK ERROR

Figure A-7

|05

IPO | tED | POS IPOL [UNC|MTE

Extended STATUS Register |

A4010

APPENDICES

EXTENDED STATUS REGISTER 2 (XSTAT2)
15114

OPM{

12|11

SIP { BPE[CAF

FC2{FC2

OPM
SIP
BPE
CAF
NA

|08

WCF

} 05

100000
40000
20000
10000

OPERATION IN PROGRESS (TAPE MOVING)
i/0 SILO PARITY ERROR
SERIAL BUS PARITY ERROR
CAPSTAN ACCELERATION FAILURE

4000
2000

NA
WRITE CLOCK FAILURE

1000

DTP

400

DEAD TRACK INDICATORS FOR TRACKS

DT7

200

DT6

100

DT5

DT4

WCF
NA

DT3

DT2

DTC

DT1

{02

DTP|DT7|DT6{DT5|DT4{DT3{DT2|DT1{DTO
S

v
DEAD TRACK INDICATORS FOR TRACKS

Figure A-8

MA-4013

Extended STATUS Register 2

EXTENDED STATUS REGISTER 3 (XSTAT3)
15 l 14

12 111
H

10
i

7J 7

’.

j05

03)02

LMX]| OPi

JREV|CRFIDCK|

|56}

NO!|LXS|RIB

100000

40000

NA
NA
NA
NA
NA
NA
LMX
OPI

20000
10000
4000
2000

NA
NA
NA
NA

1000
400
200

NA
NA
LIMIT EXCEEDED

100
40

OPERATION INCOMPLETE
TAPE MOTION REVERSE; IF MULTIPLE RETRY AT

CRF

CAPSTAN RESPONSE FAILURE

DCK

DENSITY CHECK

REV

MICRODIAGNOSTIC ERROR CODE

LEAST 1 WAS REVERSE

NOI

NOISE RECORD

LXS

LIMIT EXCEEDED STATICALLY {(LATCHED)

RIB

REVERSE INTO BOT
MA-4014

Figure A-9

Extended STATUS Register 3

APPENDIX B

TROUBLESHOOTING

REMOVE MODULES
ONE BY ONE UNTIL

FLOWCHART

MICRO RUNS.
SEE ERROR LISTING

REPLACE LAST

MAKE REPAIRS

MODULE REMOVED

MICRO
RUNS

|
CHECK:

1. MOTHER BOARD

YES

‘

PLACE MACHINE

INMAINT MODE

LOAD

TAPE

CHECK LIMIT
SWITCHES.

C BUS CABLE

M8962

M8969
mgggg

PRESS RESET

SWITCH

YES

TAPE

LOADS

l
[

YES

—

NO
TRY

i TAPE SHOULD BE ON

LOOK FOR HI

W/M8962

L LIMITSWITCH ]

ON G159 MODUL

ONLY

PM TEST #1
1.

ANY

VES

TEST FAIL

CHECK E34

LIMIT SWITCH

UP REEL ENAB

YES

INDIVIDUALLY

CHECK FOR REEL
MOTOR ON L SIGNAL
AT E1/10-J615

LOAD FAILING
TEST VIA
OPERATOR PANEL

i
ait\lnh%vh%ggé)m

ON G158 MODULE
-

REPLACE OR

ADJUST FAILING

COMPONENT

j—-l|

REPLACE:
m8962/
M8964
1§

——————— -'

REFERTOTEST

DEF/NUMBERS

FIND

PROBLEM

LOAD

TEST #1
:

(

DONE
YES

CK J12/1-2

2. CHECK HARNESS

3. CK MOTOR/START

ERROR

CAPACITORS

DISPLAY

CHECK

JACKPOT LIGHTS

LINE VOLTAGE

FIND

PROBLEM

)

MA-3993

Figure B-1

Troubleshooting Flowchart