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Document:	VAXstation 3100 Maintenance Guide Addendum Models 38 & 48
Order Number:	EK-344AA-AD
Revision:	1
Pages:	89
Original Filename:

OCR Text

VAXstation 3100 Maintenance
Guide Addendum
Models 38 & 48
Order Number EK-344AA-AD-001

digital equipment corporation
maynard, massachusetts

First Edition, September 1989
The information in this document is subject to change without notice and should not
be construed as a commitment by Digital Equipment Corporation. Digital Equipment
Corporation assumes no responsibility for any errors that may appear in this document.
The software described in this document is furnished under a license and may be used or
copied only in accordance with the terms of such license.
No responsibility is assumed for the use or reliability of software on equipment that is not
supplied by Digital Equipment Corporation or its affiliated companies.
Restricted Rights: Use, duplication, or disclosure by the U. S. Government is subject to
restrictions as set forth in subparagraph ( c ) ( 1 ) ( ii ) of the Rights in Technical Data and
Computer Software clause at DFARS 252.227–7013.
Copyright © by Digital Equipment Corporation 1989
All Rights Reserved.
Printed in U.S.A.
FCC NOTICE: The equipment described in this manual generates, uses, and may emit
radio frequency energy. The equipment has been type tested and found to comply with
the limits for a Class A computing device pursuant to Subpart J of Part 15 of FCC
Rules, which are designed to provide reasonable protection against such radio frequency
interference when operated in a commercial environment. Operation of this equipment in
a residential area may cause interference, in which case the user at his own expense may
be required to take measures to correct the interference.

The following are trademarks of Digital Equipment Corporation:
DEC
DEC/CMS
DEC/MMS
DECnet
DECsystem–10
DECSYSTEM–20
DECUS
DECwriter

DIBOL
EduSystem
IAS
MASSBUS
PDP
PDT
RSTS
RSX

UNIBUS
VAX
VAXcluster
VMS
VT

Contents
About This Guide
1

Testing

1.1
Running Power-Up Tests . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1.1
Power-Up Test Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2
Running a Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.1
Self-Test with Loopback Connectors . . . . . . . . . . . . . . . . .
1.2.2
Self-Test Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3
Running System Exerciser Diagnostics . . . . . . . . . . . . . . . .
1.3.1
System Exerciser Diagnostic Commands . . . . . . . . . . . . .
1.3.2
System Exerciser Codes . . . . . . . . . . . . . . . . . . . . . . . . . .

2
2
5
5
6
6
7
8

Troubleshooting

2.1
Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . .
2.2
TEST B — Memory (8 Mbyte Module) . . . . . . . . . . . . . . . . .
2.2.1
Additional MEM Information . . . . . . . . . . . . . . . . . . . . . .
2.3
RX23 Diskette Drive Troubleshooting . . . . . . . . . . . . . . . . .
2.3.1
Running the System Exerciser . . . . . . . . . . . . . . . . . . . . .

vii

9
9
11
13
15

Utilities (T 74 and T 76)

3.1
Diskette Formatter Utility . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.1
Diskette Formatter Messages . . . . . . . . . . . . . . . . . . . . . .
3.2
Special Diagnostic Key on Diskettes for Field Service
System Exerciser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

18
19
23

iii

iv Contents

VAXstation 3100 (Model 38) System

4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
4.10
4.11
4.12
4.13
4.14
4.15
4.16

System Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FRU Removal and Replacement . . . . . . . . . . . . . . . . . . . . . .
System Box Cover Removal . . . . . . . . . . . . . . . . . . . . . . . . .
RZ22 or RZ23 Disk Drive Removal . . . . . . . . . . . . . . . . . . .
TZ30 Tape Drive Removal . . . . . . . . . . . . . . . . . . . . . . . . . .
RX23 Diskette Drive Removal . . . . . . . . . . . . . . . . . . . . . . .
Drive Plate Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MSC Module Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graphics Coprocessor Module Removal . . . . . . . . . . . . . . . .
Memory Module Removal . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Module Removal . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery Pack Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Supply Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Keyboard Disconnection . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mouse and Tablet Disconnection . . . . . . . . . . . . . . . . . . . . .
Printer Disconnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

VAXstation 3100 (Model 48) System

5.1
5.2

25
27
29
29
32
33
36
38
40
41
42
47
48
49
50
50

System Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FRU Removal and Replacement . . . . . . . . . . . . . . . . . . . . . .

51
53

RZ56 Storage Expansion Box

6.1
6.2
6.3
6.4
6.4.1
6.4.2
6.4.3
6.4.4
6.4.5

General SCSI Bus Configuration Information . . . . . . . . . . .
Connecting the RZ56 in a BA42 Storage Expansion Box . . .
Troubleshooting the BA42 Enclosure . . . . . . . . . . . . . . . . . .
BA42 Enclosure FRU Removal and Replacement . . . . . . . . .
RZ56 Disk Drive Removal . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Drive’s Electronics Module . . . . . . . . . . . .
Removing the Drive’s HDA Assembly . . . . . . . . . . . . . . .
BA42 Enclosure SCSI ID Switchboard . . . . . . . . . . . . . . .
BA42 Enclosure Power Supply Removal . . . . . . . . . . . . .

55
55
57
60
61
66
69
70
72

Contents

Recommended Spares List

Index
Examples
1–1
1–2
1–3
1–4
2–1
2–2
2–3
3–1
3–2
3–3

Power-Up Tests Screen Display . . . . . . . . . . . . . . . . . . . . . .
Power-Up Tests with Errors . . . . . . . . . . . . . . . . . . . . . . . . .
Configuration Table (T 50) . . . . . . . . . . . . . . . . . . . . . . . . . .
Running a Self-Test on an SCSI Bus . . . . . . . . . . . . . . . . . .
MEM Error Display in the Configuration Table . . . . . . . . . .
Self-Test Results on the SCSI-A Bus . . . . . . . . . . . . . . . . . .
System Exerciser Results for the SCSI-A Bus . . . . . . . . . . .
Formatting an RX23 Diskette . . . . . . . . . . . . . . . . . . . . . . .
PV_SCS_FMT_ERR# error code Breakdown . . . . . . . . . . . .
Creating the Special Key on a Diskette . . . . . . . . . . . . . . . .

2
2
4
5
12
14
15
19
21
24

Figures
4–1
4–2
4–3
4–4
4–5
4–6
4–7
4–8
4–9
4–10
4–11
4–12
4–13
4–14
4–15
4–16
4–17

VAXstation 3100 Model 38 System Box . . . . . . . . . . . . . . . .
FRU Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cover Screw Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing an RZ22/RZ23 Disk Drive . . . . . . . . . . . . . . . . . .
Setting the SCSI ID on the RZ22 . . . . . . . . . . . . . . . . . . . . .
Removing a TZ30 Tape Drive . . . . . . . . . . . . . . . . . . . . . . . .
Setting the TZ30 SCSI ID Switches . . . . . . . . . . . . . . . . . . .
Removing an RX23 Diskette Drive . . . . . . . . . . . . . . . . . . . .
RX23 SCSI ID Switch Location . . . . . . . . . . . . . . . . . . . . . .
Removing the Drive Plate . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the MSC Module . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Graphics Coprocessor Module . . . . . . . . . . . .
Removing Memory Modules . . . . . . . . . . . . . . . . . . . . . . . . .
Separating Paired Memory Modules . . . . . . . . . . . . . . . . . .
Removing the MSC Cable from the System Module . . . . . . .
Removing the System Module . . . . . . . . . . . . . . . . . . . . . . .
Removing the Ethernet ID ROM . . . . . . . . . . . . . . . . . . . . .

26
28
29
30
31
32
33
34
35
37
39
40
41
42
43
44
45

vi Contents

4–18
4–19
4–20
4–21
5–1
6–1
6–2
6–3
6–4
6–5
6–6
6–7
6–8
6–9
6–10
6–11
6–12
6–13
6–14

Installing the System Module . . . . . . . . . . . . . . . . . . . . . . .
Battery Cable Location . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Supply Screw Locations . . . . . . . . . . . . . . . . . . . . . . .
Keyboard, Mouse or Tablet, and Printer Disconnection . . . .
VAXstation Model 48 System Box . . . . . . . . . . . . . . . . . . . .
BA42 Enclosure with One or Two RZ56 Disk Drives . . . . . .
BA42 Enclosure Connection . . . . . . . . . . . . . . . . . . . . . . . . .
BA42 Enclosure Daisy-Chained . . . . . . . . . . . . . . . . . . . . . .
BA42 Enclosure FRU Locations . . . . . . . . . . . . . . . . . . . . . .
BA42 Enclosure Cover Screws . . . . . . . . . . . . . . . . . . . . . . .
BA42 Enclosure Drive Mounting Screw . . . . . . . . . . . . . . . .
RZ56 Mounting Bracket Screws . . . . . . . . . . . . . . . . . . . . . .
BA42 Enclosure Drive Cables . . . . . . . . . . . . . . . . . . . . . . .
BA42 Enclosure Drive Mounting Position . . . . . . . . . . . . . .
RZ56 Drive Bezel Removal . . . . . . . . . . . . . . . . . . . . . . . . . .
RZ56 Drive Module Removal . . . . . . . . . . . . . . . . . . . . . . . .
BA42 Enclosure SCSI ID Switchboard Location . . . . . . . . . .
BA42 Enclosure SCSI ID Switch Setting . . . . . . . . . . . . . . .
BA42 Enclosure Power Supply Screws . . . . . . . . . . . . . . . . .

46
47
48
49
52
54
56
57
61
62
63
64
65
66
67
68
70
71
73

Tables
1
1–1
1–2
2–1
2–2
2–3
3–1
3–2
3–3
3–4
3–5
4–1
4–2
6–1

Related Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power-Up and Self-Test Commands . . . . . . . . . . . . . . . . . . .
System Exerciser Diagnostic Commands . . . . . . . . . . . . . . .
MEM System Exerciser Error Codes . . . . . . . . . . . . . . . . . .
Locating a Failed Memory Bank . . . . . . . . . . . . . . . . . . . . .
SCSI Devices Self-Test Status Codes . . . . . . . . . . . . . . . . . .
Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diskette Formatter Messages . . . . . . . . . . . . . . . . . . . . . . . .
T 76 Error Codes for the Diskette Formatter . . . . . . . . . . . .
PV_SCS_FMT_ERR# Command Codes . . . . . . . . . . . . . . . .
PV_SCS_FMT_ERR# Error Codes . . . . . . . . . . . . . . . . . . . .
FRU Section Listings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Monitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BA42 Enclosure FRU Section Listings . . . . . . . . . . . . . . . . .

viii
3
7
11
12
14
17
19
20
21
22
27
28
60

About This Guide
This guide describes how to troubleshoot, adjust, and repair the
VAXstation 3100 models 38 & 48 to the field replaceable unit (FRU) level.
It covers all FRU options presently available for the VAXstation 3100
model 38 (WS42A-xx) and 48 (WS42B-xx) systems. The label on the rear
of the system box indicates the system you are working on (WS42A-xx or
WS42B-xx).
This Guide is an addendum to the VAXstation 3100 Maintenance Guide.

Organization
This guide has six chapters and one appendix.
Chapter

Description

Testing procedures for a power-up test, self-test, and system
exerciser tests.

Troubleshooting procedures to help isolate the problem to a FRU.

Description of the utilities.

Describes the model 38 system, gives a system overview, and FRU
removal and replacement procedures.

Describes the model 48 system, gives a system overview, and FRU
removal and replacement procedures.

Describes the storage expansion box containing the RZ56 disk
drive, gives an enclosure overview, troubleshooting information,
and FRU removal and replacement procedures.

vii

viii About This Guide

Chapter

Description

Appendix A

Lists the recommended spares list (RSL).

Intended Audience
This document is for Digital Customer Service personnel and selfmaintenance customers only.

Tools and Equipment
You need the following tools to service the VAXstation 3100 models 38 &
48 systems:
Tools and Equipment

Part Number

Wrist strap and antistatic mat (included in Field
Service antistatic kit)

29-26246-00

Related Documents
You can order the following documents from Digital. This guide refers to
many of these documents.
Table 1 Related Documents
Documents

Order Number

VR150 Pocket Service Guide

EK-VR150-PS

VR160 Pocket Service Guide

EK-VR160-PS

VR262 Pocket Service Guide

EK-VR262-PS

VR299 Pocket Service Guide

EK-VR299-PS

VR297 Service Manual

EK-VR297-SG

VAXstation 2000, MicroVAX 2000, VAXmate
Network Guide

EK-NETAB-UG

TZK50/SCSI Controller Technical Manual

EK-TZK50-TM

RZ22 and RZ23 Disk Drive Service Manual

EK-RZ223-SV

About This Guide ix

Table 1 (Cont.) Related Documents
Documents

Order Number

RX23 Diskette Drive Service Manual

EK-RX23D-SV

RZ55 Disk Drive Service Manual

EK-RZ55D-SV

RZ56 Disk Drive Service Manual

EK-RZ56D-SV

VAXstation 3100 Owner’s Manual

EK-MOD30-OM

Digital personnel may order the documents in Table 1 from:
Digital Equipment Corporation
444 Whitney Street
Northboro, MA 01532
Attn: Publishing and Circulation Services (NRO3/W3)
Order Processing Section

Conventions
This document uses the following conventions:
Convention

Meaning

Note

Provides general information.

1
Testing
This chapter is an overview of the testing procedures for the
VAXstation 3100 model 38 and 48 systems. Since the testing procedures
for the VAXstation 3100 models 38 and 48 are similar to the testing
procedures for the VAXstation 3100 models, this chapter will not
repeat the information described in Chapter 1 of the VAXstation 3100
Maintenance Guide. If you are not familiar with the diagnostics available
on the VAXstation 3100 models 38 and 48 systems, you should read
through the testing procedures in Chapter 1 of the VAXstation 3100
Maintenance Guide.
The label on the back of the system box indicates which model you are
working on. The WS42A-xx model number on the label identifies the
VAXstation 3100 model 38 system and the WS42B-xx model number
identifies the VAXstation 3100 model 48 system.
All testing is done while in the console mode and diagnostic tests are
ROM-based.
This chapter contains an overview of the following procedures:
•

Running power-up tests

•

Running self-tests

•

Running system exerciser diagnostics

2 Testing

1.1 Running Power-Up Tests
Power-up tests run each time you turn the system power on and, if the
tests are successful, the operating system starts booting. Power-up testing
consists of a sequence of tests executed for each device installed in the
system. The test number of each device is listed on the power-up screen
display as the device is tested.
To run power-up tests, turn the system power switch on.
Example 1–1 shows an example of the power-up screen display.
KA42-B V1.0
F...E...D...C...B...A...9...8...7...6...5...4...3_..2_..1...

Example 1–1

Power-Up Tests Screen Display

Example 1–2 shows the power-up screen display with a hard error found
in TEST F and a soft error in TEST E.
KA42-B V1.0
F?..E...D...C...B...A...9...8...7...6...5...4_..3_..2_..1...
?? F
? E

00B0
0040

Example 1–2

0001.F002
0000.0005

(Hard error)
(Soft error)

Power-Up Tests with Errors

Usually, a question mark (?) in the power-up summary indicates a soft
error and the system may be usable without replacing any FRUs.
Double question marks (??) in the power-up summary indicates a hard
error. This indicates a serious problem that may affect the normal
operation of some component in the system. The failing device must
be replaced before booting the operating system software.

1.1.1 Power-Up Test Codes
The power-up test codes indicate no error, soft errors, status information,
or hard (fatal) error information. Any errors found by power-up tests are
listed in the power-up tests summary. These errors as well as the status
of all devices installed in the system are then stored in the configuration
table (TEST 50). See Example 1-3.

Testing 3

Table 1–1 lists the test numbers and the devices that are tested during
that particular test. To look at the status of a device, display the
configuration table.
>>> TEST 50

The configuration table lists every device in the system and also lists
the results of the power-up tests and self-test. It is updated each time
a self-test is run (mouse status is not updated). Remember that the
configuration table contains the results of the power-up tests and self-test
and not the results of the system exerciser.
Table 1–1 Power-Up and Self-Test Commands
Test

Mnemonics

Device

MONO

Base video

CLK

Time-of-year clock

NVR

Nonvolatile random access memory (RAM)

Serial line controller

MEM

Memory

Memory management unit

Floating point unit

Interval timer

SCSI-A

SCSI-A bus controller
Internal RZ22 and RZ23 disk drives
Internal TZ30 tape drive
Internal RX23/SCSI adapter assembly

SCSI-B

SCSI-B bus controller
Internal RZ22 and RZ23 disk drives†
Internal RRD40 compact disk and adapter board†
RZ55 storage expansion box
RZ56 storage expansion box
TK50Z-GA storage expansion box
RRD40 storage expansion box

SYS

Interrupt controller and Ethernet ID ROM

8PLN

Option module (8-plane graphics module)

Model 38 systems only
†Model 48 systems only

4 Testing

Table 1–1 (Cont.) Power-Up and Self-Test Commands
Test

Mnemonics

Device

Option module (not available)

Ethernet circuits

Example 1–3 shows an example of the configuration table.
>>> TEST 50
KA42-B V1.0
ID 08-00-2B-02-CF-A4
MONO
0000.0001
CLK
0000.0001
NVR
0000.0001
DZ
0000.0001
00000001 00000001 00000001 00000001 00000001 000012A0
MEM
0008.0001
00800000
MM
0000.0001
FP
0000.0001
IT
0000.0001
SCSI-A
0808.0001 V1.0
FFFFFF05 FFFFFF05 FFFFFF05 00000001 FFFFFF05 FFFFFF05 FFFFFF03
SCSI-B
3C3C.0001 V1.0
FFFFFF05 FFFFFF05 00000001 00000001 05000001 01000001 FFFFFF03
SYS
0000.0000
8PLN
0000.0001 V1.0
NI
0000.0001
>>>

Example 1–3

Configuration Table (T 50)

Any code in the configuration table other than 0000.0001 on the MONO,
DZ, MM, FP, IT, or SYS devices indicates a hard error and the system
module must be replaced for proper operation of the system. The other
devices such as CLK, NVR, MEM, SCSI-A, SCSI-B, and NI may have a
code other than (0000.0001) and may still operate normally.

Testing 5

1.2 Running a Self-Test
Self-test allows you to test every device again after power-up tests are
complete. Devices can be tested individually (except for drives), a few at a
time, or all of them sequentially just like power-up tests.
To individually test a device (drives are tested all together on their
particular bus), enter the word (TEST) or just the letter (T), followed by
a space and the test number of the device you want tested. Table 1–1
lists the devices and the test numbers that test the devices. Example 1–4
shows an example of running a self-test on an SCSI bus. All devices
connected to the SCSI bus are tested and the results are listed in the
configuration table (TEST 50).
>>> TEST 6
6...
>>>
NOTE: Enter TEST 50 to see the results

Example 1–4

Running a Self-Test on an SCSI Bus

1.2.1 Self-Test with Loopback Connectors
A customer mode self-test (that is, without any serial line loopbacks) does
not test the drivers on the serial lines (DZ). To test the DZ drivers, run a
self-test on the serial lines in field service mode by installing loopbacks
on the two MMJ connectors, then run TEST C. Display the configuration
table to see the results.
If only one MMJ loopback is available, install it in the communications
port and run the tests. An error code of 0000.0200 for the DZ indicates
that the printer port does not have the loopback installed but the
communications port tested successfully.
NOTE
The ThinWire Ethernet port or the standard Ethernet port
(depending on which port the customer is using) on the back
of the system box must be terminated properly when running
diagnostics on the Ethernet circuits (TEST 1). Otherwise an error
code of 0000.7001 or greater is listed in the configuration table.

6 Testing

1.2.2 Self-Test Codes
If an error is detected during a self-test, a question mark (?) is put next
to the test number and a failure message (84 FAIL) is displayed. You
must display the configuration table (enter TEST 50) after a self-test is
complete to see the error code.

1.3 Running System Exerciser Diagnostics
The system exerciser simulates a worst-case operating system situation
test for each device and checks how the device operates under these
conditions. This type of testing usually finds any interactive problems.
To run the field service mode system exerciser, perform the following
steps:
1. Install a loopback on the communication port.
2. Insert and load the special-keyed test diskette, compact test disk, and
tape cartridge.1
3. Enter TEST 101, TEST 102, or TEST 80000106.
TEST 80000106 allows you to enter the test number of the individual
devices you want to run the exerciser on. If the diskette or the tape
drive are not loaded with the special-key media, the system exerciser
does not do destructive writes to them and tests them the same way
as it does during the customer mode system exerciser. If the compact
disk drive is not loaded with the test disk, the drive does not perform
any reads. If the test disk is not available, any disk loaded allows
the exerciser to perform reads but does not check the error correction
circuits (ECC).
Refer to Chapter 3 of the VAXstation 3100 Models 38 and 48 Maintenance
Guide if you need information on creating the special diagnostic keys on
the diskette and tape.

This special key on the media prevents the exerciser from accidentally destroying
data on the customer’s diskette or tape cartridge. The compact disk never does
write testing, only reads.

Testing 7

1.3.1 System Exerciser Diagnostic Commands
Table 1–2 lists the system exerciser diagnostic commands. When running
TEST 0 or TEST 101, the exerciser automatically stops after about 5
minutes and the halt message (06 HLT INST) is displayed. This halt
message is normal for these two tests.
Table 1–2 System Exerciser Diagnostic Commands
Test

Description of Commands

Runs customer mode system exerciser. No loopback connectors are
needed. Removable media must be loaded in the RX23 diskette
drive for the exerciser to recognize the drive. The TZ30 does not
require media to be loaded. The exerciser tests each device once
sequentially, then tests them simultaneously, and stops when the
slowest device finishes (about 5 minutes).

T 101

Runs field service mode system exerciser. Loopbacks and
removable media are required. It exercises each device once
sequentially, then exercises them simultaneously, and stops when
the slowest device finishes (about 5 to 8 minutes). Do not stop the
exerciser before it is finished.

T 102

Runs field service mode system exerciser. Loopbacks and
removable media are required. It exercises each device once
sequentially and then exercises them simultaneously until
you press Ctrl C to terminate the tests. Once the tests are
terminated, an extended summary for some of the tests can be
displayed by pressing Return . Continue pressing Return to
display more extended summaries. Press Ctrl C a second time
to terminate the extended summary which will bring you back to
the console prompt >>>. Note that the exerciser takes up to 30
seconds to stop after you press Ctrl C. Do not stop the exerciser
until every device is exercised twice (second pass). Also, do not
press the halt button to stop the exerciser.

T
80000106

Individual device testing. Loopbacks and removable media are
required. Runs system exerciser diagnostics on individual devices
(TEST 6 and TEST 7 are considered individual devices even
though they test several drives). This test allows you to test
individual devices by entering the test number of the device at a
second prompt. This individual testing saves time since you do
not have to wait for all of the other devices to finish testing.

8 Testing

1.3.2 System Exerciser Codes
The system exerciser displays the status of the devices on the screen as
the exerciser is running. Any errors found are displayed in the exerciser
display. When examining the exerciser display, a question mark (?) in the
far left column indicates a soft error, double question marks (??) indicate
a hard error, and the absence of question marks usually indicates success.
There may be times when there are no question marks, but a drive may
not be listed in the display (for example, an unplugged power cable). In
these instances, you need to be familiar with the codes of all devices so
that when you examine the display, you know if a specific drive or device
is listed and if the drive or device has a fault.

2
Troubleshooting
This chapter contains information for troubleshooting the new devices
available on the VAXstation 3100 model 38 and 48 systems. The label
on the back of the system box indicates which model you are working
on. The WS42A-xx model number on the label identifies model 38 and
the WS42B-xx model number identifies model 48 systems. All procedures
in this chapter apply to both system models unless specifically listed in
the section titles or as described in the text. Also, all troubleshooting
procedures are done while in console mode (operating system software
halted).

2.1 Troubleshooting Procedures
This section contains troubleshooting information for the devices listed
below. If the device you need to troubleshoot is not listed below, use
the troubleshooting procedures in Chapter 2 of the VAXstation 3100
Maintenance Guide.
•

8 Mbyte memory module (Section 2.2)

•

RX23 diskette drive with the SCSI adapter module (Section 2.3)

•

RZ56 disk drive expansion box (See Chapter 6)

2.2 TEST B — Memory (8 Mbyte Module)
The procedure for troubleshooting the 8 Mbyte memory module is
the same as troubleshooting the other memory modules. You need to
remember that the 8 Mbyte module contains dual port connectors which
means that a 4 or a 12 Mbyte memory module can be attached underneath
it (similar to the 16 Mbyte memory module).

10 Troubleshooting

The diagnostics used to test the 8 Mbyte memory module tests all of the
main memory in the system including the 4 megabytes on the system
module. Therefore, any error for the memory must be deciphered to
determine which module contains the error. There may be more than one
module containing the error.
Running a Self-Test
A self-test performs a quick checksum of the memory in the system. The
results are stored in the configuration table (T 50). To run a self test:
1. Enter TEST B.
2. Enter TEST 50 to see the results.
Self-Test Results
A code of 00XX.0001 next to the MEM mnemonic indicates no errors
(the XX is the total amount of memory installed in the system (in
hexadecimal)).
If an error is detected, refer to Section 2.2.1 to determine which module,
the system module or one of the memory modules, needs to be replaced.
Running the System Exerciser
The system exerciser performs a more thorough test of the memory in
the system (including the 4 megabytes on the system module). To run the
system exerciser:
1. Install a loopback on the communication port.
2. Enter TEST 80000106 and B.
3. Read the results on the screen during the test.
System Exerciser Results
A code of 0XXX.0001 next to the MEM mnemonic indicates no errors (the
XXX is the number of pages of memory tested during the last pass of the
exerciser (1 page = 512 bytes)).
If an error is detected, refer to Table 2–1 to determine which module, the
system module or one of the memory modules, needs to be replaced.

Troubleshooting 11

Table 2–1 MEM System Exerciser Error Codes
Error
Codes

Definition

0XXX.0001

Success—no error. XXX = number of pages tested.

0001.000F

Operating system error

0002.000F

Operating system error

0003.000F

Operating system error

0004.000F

Operating system error

0005.000F

Operating system error

0006.000F

Operating system error

0007.000F

Operating system error

0008.000F

Operating system error

0001.001F

Compare error on system module

0002.001F

Compare error on an option module

0001.002F

Parity error on system module

0002.002F

Parity error on an option module

2.2.1 Additional MEM Information
The code for MEM in the configuration table indicates the amount of
memory available if no errors are detected. For example, 0010.0001
indicates that 16 Mbytes of memory is available (10 in hexadecimal = 16).
The second MEM line in the configuration table contains two 8-digit codes,
one of which is displayed when errors are detected. The first code repeats
the amount of memory in the system and the second code (displayed only
if an error is detected) contains the location of the failed memory.
Example 2–1 shows the second 8-digit number of the MEM display in the
configuration table. The 3 in the last digit indicates the error is on the
system module. A code other than 0 in the last digit indicates an error on
the system module. A code other than 0 in the other seven digits indicates
an error on a memory option module.
Each digit contains the status of four banks of memory (1 bank = 1 Mbyte
of memory). As shown in Example 2–1, the last digit contains the status
of the four banks of memory on the system module.

12 Troubleshooting

?? MEM

0010.0020
01000000 00000003

System module error if not a zero (0)
as shown in this example.
Bit map representation of the failed
memory bank on a memory module if not
all zeros (0000000).
Hexadecimal representation of the
total amount of memory in the system
as listed below.
00400000
00800000
00C00000
01000000
01400000
01800000
01C00000
02000000

Example 2–1

4 MBytes
8 MBytes
12 Mbytes
16 Mbytes
20 Mbytes
24 MBytes
28 Mbytes
32 Mbytes

MEM Error Display in the Configuration Table

Table 2–2 lists the location of each module’s banks in the 8-digit code for
all memory option configurations. The following shows what each letter
in Table 2-2 represents:
Z =
Y =
X =
V =
W =

system module
4 megabyte module
8 megabyte module
16 megabyte module
12 megabyte module

Table 2–2 Locating a Failed Memory Bank
Memory Module
Configurations

8-Digit Error Code for MEM

System module

4 Mbyte module

8 Mbyte module

12 Mbyte module

Troubleshooting 13

Table 2–2 (Cont.) Locating a Failed Memory Bank
Memory Module
Configurations

8-Digit Error Code for MEM

16 Mbyte module

4 and 8 Mbyte modules

8 and 12 Mbyte modules

4 and 16 Mbyte modules

12 and 16 Mbyte modules

2.3 RX23 Diskette Drive Troubleshooting
The procedure for troubleshooting the RX23 diskette with the SCSI
adapter module is the same as troubleshooting the other drives on the
SCSI bus. You need to remember that the device name of the RX23 drive
is usually DKA500. The 5 indicates the SCSI ID and the A indicates the
RX23 is on the SCSI-A bus.
The diagnostics used to test the RX23 drive and the SCSI adapter module
are the self-test and the system exerciser.
Running a Self-Test
A self-test performs an inquiry of the drive and reports the status of
the drive and the SCSI adapter module. No read/write operations are
performed. The results are stored in the configuration table (T 50). To
run a self-test:
1. Enter TEST 7.
2. Enter TEST 50 to see the results.
Self-Test Results
A code of 00000001 in the fifth position (if RX23 is at SCSI ID 5) in
the SCSI-A bus status line indicates no errors. Example 2–2 shows an
example of SCSI-A bus codes in the configuration table.
If any errors are detected, one or two question marks are flagged in the
left column next to the SCSI-A mnemonic.

14 Troubleshooting

SCSI−A
2C2C.0001
FFFFFF05 FFFFFF05 00000001 00000001 FFFFFF05 00000001 FFFFFF03 ...

offline

Example 2–2

RZ23
drive

offline

RX23
drive

SCSI−A
controller

Self-Test Results on the SCSI-A Bus

If a Self-Test Indicates an Error
The error may be on the RX23 drive, on the other drives on the SCSI-A
bus, or on the SCSI-A bus controller. To determine which device is faulty,
examine the status codes of the individual drives. The SCSI IDs are
numbered 0 through 7 from left to right (for example, the RZ23 disk drive
is located at SCSI ID 2 and the RX23 diskette drive is located at SCSI ID
5). Table 2–3 lists the normal status codes for each SCSI device available
on the SCSI bus.
Any code other than those listed indicates an error in the device at that
SCSI ID.
Table 2–3 SCSI Devices Self-Test Status Codes
Status
Code

SCSI Device

FFFFFF05

Device is offline or not installed at this SCSI ID
If a drive’s status code indicates FFFFFF05, check the drive’s
cabling and power, then retest. If the code is still FFFFFF05 after
retesting, then replace the drive.

FFFFFF03

SCSI bus controller

FFFFFFFF

Device not tested - possible SCSI bus controller error

00000001

RZ22, RZ23, or RZ56 disk drive

00000001

RX23/SCSI adapter assembly

01000001

TZ30 or TK50 tape drive

05000001

RRD40 compact disk drive

Troubleshooting 15

2.3.1 Running the System Exerciser
The system exerciser performs a more thorough test of the RX23 diskette
and the SCSI adapter module. It performs a read/write operation during
the second pass of the exerciser when the special keyed diskette is loaded
in the RX23 drive before starting the system exerciser. To run the system
exerciser:
1. Install a loopback on the communication port.
2. Load the special keyed diskette in the RX23 drive. If the diskette
does not contain the special key, go to Section 3.2 and perform the
procedure to write the special key on the diskette.
3. Enter TEST 80000106 and 7.
4. Read the results on the screen during the test.
5. Press the halt button to stop the exerciser.
System Exerciser Results
A code of 5300.0001 listed under the SCSI-A bus indicates no errors for
the RX23 and the read/write operation is successful.
A code of 5100.0001 listed under the SCSI-A bus indicates no errors.
However, no write operation took place either because the exerciser is still
executing the first pass, or the special key is not found on the diskette, or
no diskette is loaded.
Example 2–3 shows the system exerciser display for the SCSI-A bus.
There is one line for the status of the SCSI-A controller on the MSC
module and one line for each of the drives installed on the SCSI-A bus.
The status of the SCSI controller is next to the SCSI-A mnemonic (first
line) and the status of each drive is listed under the controller’s code
(separate line for each drive).
7

80A0

SCSI−A

6000.0001
2200.0001
3200.0001
5300.0001

0000

0 00:05:26

RX23/SCSI adapter assembly
RZ23 disk drive
RZ23 disk drive

Example 2–3

System Exerciser Results for the SCSI-A Bus

16 Troubleshooting

If an Error is Detected
If there are any question marks (?) on the SCSI controller’s status line,
the SCSI controller is probably faulty and must be replaced.
If there are any question marks on a drive’s status line, the problem could
be in either the drive, the SCSI bus cabling, the SCSI bus terminator,
or the SCSI controller. For example, an error that is listed in the drive’s
code may be a data transfer error and does not isolate the problem to the
device itself; it may still be in the SCSI controller.

3
Utilities (T 74 and T 76)
This chapter describes the two new utilities available on the VAXstation
3100 models 38 and 48 systems. These two utilities are both used to
format RX23 diskettes. Test 74 formats the special diagnostic key on the
test diskette, which allows the field service system exerciser to perform
writes to the drive. Test 76 formats new diskettes for normal data storage.
Table 3–1 lists all of the utilities available on the VAXstation 3100 models
38 and 48 systems. Refer to the VAXstation 3100 Maintenance Guide for
a description of these other utilities.
Table 3–1 Utilities
Test
Number

Utility Invoked

T 50

Configuration table (also displays the Ethernet hardware
address, for example, ID 08-00-2B-02-CF-A4)

T 51

Set NVR default boot device

T 52

Set NVR default boot flags

T 53

Set NVR default recovery action flags

T 54

Sets keyboard language

T 55

Shows system exerciser extended summary

T 60

Alignment circle and crosshatch (no graphics module installed)

T 61

Monochrome screen of Es (no graphics module installed)

T 62

Monochrome white screen (no graphics module installed)

T 73

Special key on tapes for field service mode system exerciser

Will not work with an 8-plane graphics module installed.

18 Utilities (T 74 and T 76)

Table 3–1 (Cont.) Utilities
Test
Number

Utility Invoked

T 74

Special key on diskettes for field service mode system exerciser

T 75

SCSI disk data eraser

T 76

Diskette formatter

T 80†

Circle-crosshatch (color and monochrome monitors)

T 81†

Screen of all Es (color and monochrome monitors)

T 82†

White screen (color and monochrome monitors)

T 83†

4-bar color bar

T 84†

Red screen

T 85†

Green screen

T 86†

Blue screen

T 87†

8-bar color bar

T 88†

Gray scale (color and monochrome monitors)

†Will work only with an 8-plane graphics module installed.

3.1 Diskette Formatter Utility
This utility formats RX23 diskettes. The command to start the formatter
is TEST 76. Example 3–1 shows an example of running the formatter on
a DKA500 (RX23).
CAUTION
Formatting destroys all user data on the diskette.

Utilities (T 74 and T 76) 19

>>> TEST 76
ScsFlpFmtter
PV_SCS_FMT_CHN

(0=SCSIA \ 1=SCSIB)? 0

Enter SCSI bus.

PV_SCS_FMT_ID

(0,1,2,3,4,5,6,7)? 5

Enter SCSI ID of RX23.

PV_SCS_FMT_RUsure (1/0)? 1

Enter a 1 for yes, 0 for no.

PV_SCS_FMTing...

Formatting diskette

PV_SCS_FMT_CHKpass...

RX23 format checked OK.

PV_SCS_FMT_SUCC

Diskette is formatted
successfully.

>>>

Example 3–1

Formatting an RX23 Diskette

3.1.1 Diskette Formatter Messages
Table 3–2 lists all the formatter messages and gives an explanation for
each.
Table 3–2 Diskette Formatter Messages
Formatter Message

Explanation

PV_SCS_FMT_CHKpass

A check pass is being done on the diskette.

PV_SCS_FMT_CHN

Enter the SCSI bus that is connected to the
RX23/SCSI adapter assembly. Enter 0 for the
SCSI-A bus or enter 1 for the SCSI-B bus.

PV_SCS_FMTing

The RX23 diskette is being formatted.

PV_SCS_FMT_RUsure

The formatter uses this question as a safety
check. Enter 1 for yes if you want to format the
diskette, otherwise enter any character other
than 1 to abort the formatter.

PV_SCS_FMT_ID

Enter the SCSI ID of the RX23. Usually the
RX23 ID is set for ID 5.

PV_SCS_FMT_SUCC

The diskette has been successfully formatted.

20 Utilities (T 74 and T 76)

Table 3–2 (Cont.) Diskette Formatter Messages
Formatter Message

Explanation

PV_SCS_FMTex

The RX23 formatter has been aborted.

PV_SCS_FMT_ERR#

The formatter has been stopped because of
the error code indicated by the pound sign (#).
Table 3–3 lists the error codes.

Table 3-3 lists all the T76 error codes and gives a description for each.
Table 3–3 T 76 Error Codes for the Diskette Formatter
Code

Description

Wrong SCSI bus or SCSI ID entered

SCSI command error

Medium error. A read or write failed

Unit not ready. No media

Illegal device type

SCSI bus hung after reset attempt

Data compare error

See the section Determining the problem for more details.

Determining the problem
An eight digit error code may be listed under the PV_SCS_FMT_ERR#
error message. If this eight digit error code is listed, you can determine
which command was sent to the RX23 and why the command failed.
Example 3–2 shows the eight digit error code breakdown.

Utilities (T 74 and T 76) 21

PV_SCS_FMT_ERR 2
03000006

Error code
Always zeros
Command code

Example 3–2

PV_SCS_FMT_ERR# error code Breakdown

Table 3–4 lists the command codes for the eight digit error code listed
under the PV_SCS_FMT_ERR# error message.
Table 3–4 PV_SCS_FMT_ERR# Command Codes
Command Code

Command Sent to Device

Test Unit Ready

Request Sense

Format_Unit

Read

Write

Inquiry

Mode Select

Mode Sense

Start Unit

Read Capacity

No Command

Table 3–5 lists the error codes for the eight digit error code listed under
the PV_SCS_FMT_ERR# error message.

22 Utilities (T 74 and T 76)

Table 3–5 PV_SCS_FMT_ERR# Error Codes
Error
Code

Description of Code

Bad status returned by device

Not enough sense data returned

Bad sense key returned by device

Too many retries of this command, failed after request_sense

Attempt to select host

No req was received within timeout period

Entered the same phase twice

Device in the cmd phase is out of order

Device in the data in phase is out of order

Unexpected entry in the data in phase (the command should not go
in the data in phase at all)

Device in the status phase is out of order

Device in the msg in phase is out of order

Device in the data out phase is out of order

Unexpected entry in the data out phase (the command should not go
in the data out phase at all)

Entry in unsupported phase 4

Entry in unsupported phase 5

Device has not signaled a phase

No data transferred when receiving bytes

AIP bit not set soon enough

Selection failed

Too many REQs

Timeout waiting for bus after command (req is not set)

Not enough inquiry data returned by device

Reset did not clear bus

Attempt to access SCSI B on ST506 board

Utilities (T 74 and T 76) 23

Table 3–5 (Cont.) PV_SCS_FMT_ERR# Error Codes
Error
Code

Description of Code

Unexpected msg out phase

Too many retries of this command, failed after bus_device_reset

Timeout waiting for bus free after command (req is set)

No interrupt request for the dma in phase

SCD_CNT not zero following dma in phase

No interrupt request for the dma out phase

SCD_CNT wrong following dma in phase

Phase did not change soon after data xfer in phase

Phase did not change soon after data xfer out phase

Parity error on SCSI bus

SCSI req was not set in time

SCSI req was not cleared in time

3.2 Special Diagnostic Key on Diskettes for Field
Service System Exerciser
The diskette in the maintenance kit must have a special diagnostic code
written on it to allow the system exerciser to write on the diskette when
running in the field service mode. Without this special key, such as
on normal customer diskettes, the system exerciser does not perform
write testing on the diskette. This safety feature prevents accidentally
destroying the customer’s programmed diskettes.
TEST 74 creates a special key on the diskette. The diskette in the
maintenance kit must first be formatted using the T 76 command
(described in Section 3). Secondly, the diskette must have the special
diagnostic key written on it before it can be used with the field service
mode system exerciser.
Example 3–3 shows a successful example of creating a special-key
diskette.

24 Utilities (T 74 and T 76)

>>> TEST 74
KA42 Flmker
VSflmk_QUE_port (A,B) ? A

Enter SCSI bus port.

VSflmk_QUE_id (0,1,2,3,4,5,7) ? 5

Enter ID address of drive.

VSflmk_QUE_RUsure (1/0) ? 1

Enter 1 for yes, 0 for no.

VSflmk......... ok

Keyed successfully.

>>>

Example 3–3

Creating the Special Key on a Diskette

If any errors occur while running TEST 74, make sure the drive is online
and operating properly, then run the special-key command again. Also
ensure that the diskette was originally formatted using the T76 command.

4
VAXstation 3100 (Model 38) System
4.1 System Contents
The VAXstation 3100 model 38 (WS42A-xx) consists of the system box,
monitor, mouse or tablet, and keyboard. The label on the back of the
system box indicates which model you are working on. The WS42A-xx
model number on the label identifies the VAXstation 3100 model 38
system and the WS42B-xx model number identifies the VAXstation 3100
model 48 system.
The system box contains several field replaceable units (FRUs): the
system module, one or two memory modules, a graphics module, a power
supply, a mass storage controller (MSC) module and up to three internal
mass storage devices (TZ30 tape drive, an RX23 diskette drive, and either
one or two RZ22 or RZ23 disk drives).
There are four expansion boxes available that contain additional mass
storage devices. They are:
•

TK50Z-GA storage expansion box

•

RZ55 storage expansion box

•

RZ56 storage expansion box

•

RRD40 storage expansion box

There are seven monitors available. The keyboard is an LK201 keyboard.
The seven monitors are:
•

VR160 color monitor

•

VR290 color monitor

•

VR297 color monitor

•

VR299 color monitor
25

26 VAXstation 3100 (Model 38) System

•

VR150 monochrome monitor

•

VR260 monochrome monitor

•

VR262 monochrome monitor

Figure 4–1 shows the VAXstation 3100 model 38 system box.
EXTERNAL
SCSI
PORT

STANDARD
Ethernet

NET
SELECT
INDICATORS

Ethernet
SWITCH

PORT

ThinWire
Ethernet
PORT

HALT
BUTTON

KEYBOARD

VIDEO

PORT

MOUSE/
TABLET

PRINTER
PORT

COMM
PORT

SWITCHED
AC OUTLET

LEDS
S3

PORT

VAXstation 3100 M38

MA-X0794-88B

Figure 4–1

VAXstation 3100 Model 38 System Box

The monitor is connected to the 15-pin video port. A printer can be
connected to the printer port. A terminal or another printer can be
connected to the communication port. Connection to the Ethernet is done
through either the ThinWire Ethernet port or the standard Ethernet port
depending on which type of Ethernet network is available.
The position of the Ethernet switch determines which of the Ethernet
ports provides IEEE 802.3 network communications. An LED is lit next
to the enabled port. The keyboard is connected to the keyboard port either
on the back of the system box or on the monitor end of the video cable.
The mouse or tablet is connected to the mouse port either on the back
of the system box or on the monitor end of the video cable. The external
SCSI port is for connecting external mass storage devices to the system.

VAXstation 3100 (Model 38) System 27

The monitor or an external mass storage device can be plugged in the
switched ac outlet.
The S3 switch next to the LEDs on the back of the system module controls
the console port. When the S3 switch is in the down position, it enables
the monitor connected to the monitor port to be the console. When the S3
switch is in the up position, it enables a terminal connected to the printer
port to be the console.

4.2 FRU Removal and Replacement
This section describes the removal and replacement procedures for the
FRUs in the VAXstation 3100 model 38 system. To use this section, find
the name of the FRU that needs replacing in Table 4–1, then go to the
section listed beside the FRU. Follow the steps in the section to remove
the FRU and reverse the procedures to replace the FRU. Always test the
replaced device for proper operation.
CAUTION
Wear a static wrist strap and use a static mat when replacing
FRUs.
Table 4–1 FRU Section Listings
FRU

Section

Battery pack

4.12

Keyboard

4.14

Mass storage controller (MSC) module

4.8

Memory module

4.10

Mouse and tablet

4.15

8-plane graphics coprocessor option

4.9

Power supply

4.13

System module

4.11

RX23 diskette drive

4.6

TZ30 tape drive

4.5

RZ22 or RZ23 disk drive

4.4

The FRUs for the monitors are not covered in this guide. This information
is contained in the various pocket service guides listed in Table 4–2.

28 VAXstation 3100 (Model 38) System

Table 4–2 Monitors
Monitor

Document Title

Order Number

VR150

VR150 Pocket Service Guide

EK-VR150-PS

VR160

VR160 Pocket Service Guide

EK-VR160-PS

VR262

VR262 Pocket Service Guide

EK-VR262-PS

VR290

VR290 Service Guide

EK-VR290-SV

VR297

VR297 Service Guide

EK-VR297-SG

VR299

VR299 Service Guide

EK-VR299-SG

Figure 4–2 shows the FRU locations.
SCSI Mass Storage
Controller Module
RZ22 or RZ23 Hard Disks

Drive Plate

RX23 Diskette Drive
(shown) or TZ30 Tape Drive
Power Supply
(Do Not Enter)
Graphics Coprocessor
Module
One or Two Memory Modules

System Module
MLO-002885

MA-X0850-89

Figure 4–2

FRU Locations

VAXstation 3100 (Model 38) System 29

4.3 System Box Cover Removal
To remove the system box cover:
1. Shut down the system software.
2. Turn the system power switch off.
3. Unscrew the two captive screws as shown in (Figure 4–3).
4. Slide the cover forward and up off the system box.

Cover Screws
MLO-002884

MA-X0849-89

Figure 4–3

Cover Screw Locations

4.4 RZ22 or RZ23 Disk Drive Removal
To remove an RZ22/RZ23 disk drive:
1. Remove the system box cover (Section 4.3).

30 VAXstation 3100 (Model 38) System

2. Disconnect the internal power cable, pn 17–02440–01, and the SCSI
signal cable, pn 17–02439–01, from the back of the disk that is being
removed (Figure 4–4).

Remove Internal
Power Cable

Remove SCSI
Signal Cable

SCSI Signal Cable

Internal Power Cable

RZ23 Hard Disk
SCSI Mass Storage
Controller Module

Press Lever
Down

Drive Plate Lever
Slide Drive Over
and Remove
MLO-002911

MA-X0867-89

Figure 4–4

Removing an RZ22/RZ23 Disk Drive

3. Locate the drive plate lever under the disk drive that is being
removed.

VAXstation 3100 (Model 38) System 31

4. Simultaneously press down on the drive plate lever and slide the drive
toward the lever until you can lift the drive from the plate.
5. Turn the drive over and locate the SCSI ID jumper settings E1, E2,
E3, and E4 as shown in (Figure 4–5).
Record the positions of the jumpers on the drive so you can set the
jumpers on the replacement drive to the same positions.
CONNECTOR TO
HDA MODULE

SIGNAL
CONNECTOR

E1
E2
E3

POWER
CONNECTOR

MA-X0798-88

Figure 4–5

Setting the SCSI ID on the RZ22

6. To install the new drive, reverse the removal procedures in
Section 4.4.

32 VAXstation 3100 (Model 38) System

4.5 TZ30 Tape Drive Removal
To remove a TZ30 tape drive:
1. Remove the system box cover (Section 4.3).
2. Disconnect the internal power cable, pn 17–02440–01, and the
SCSI signal cable, pn 17–02439–01, from the back of the tape drive
(Figure 4–6).

Internal Power Cable
Remove Internal
Power Cable

SCSI Signal Cable

Remove SCSI
Signal Cable

Press Lever
Down
TZ30 Tape
Drive

Drive Plate Lever
Slide Drive Over
and Remove

SCSI Mass Storage
Controller Module

MLO-002910

MA-X0866-89

Figure 4–6

Removing a TZ30 Tape Drive

VAXstation 3100 (Model 38) System 33

NOTE
The TZ30 drive plate lever may have shipping material under
it. If it does, remove the shipping material and discard it
before performing the next step.
3. Simultaneously press down on the drive plate lever under the TZ30
and slide the drive toward the lever until you can lift the drive from
the plate.
4. Locate the SCSI ID switch settings 1, 2, 3, and 4 on the side of the
drive as shown in (Figure 4–7).

Record the SCSI ID switch positions on the drive so you can set the
ID switches on the replacement drive to the same positions. Usually,
the switches are set to SCSI ID 5 as shown in (Figure 4–7).

Switch Positions:

On (Left)

Off (Right)

4
3
2
1

SCSI ID 5

MLO-002890

MA-X0855-89

Figure 4–7

Setting the TZ30 SCSI ID Switches

5. To install the new tape drive, reverse the removal procedures in
Section 4.5.

4.6 RX23 Diskette Drive Removal
To remove an RX23 diskette drive:
1. Remove the system box cover (Section 4.3).

34 VAXstation 3100 (Model 38) System

2. Disconnect the internal power cable, pn 17–02440–01, and the SCSI
signal cable, pn 17–02439–01, from the back of the RX23 drive
(Figure 4–8).
SCSI Signal Cable

Internal Power Cable

RX23 Diskette Drive

Drive Plate Lever
SCSI Mass Storage
Controller Module

MLO-002909

MA-X0865-89

Figure 4–8

Removing an RX23 Diskette Drive

VAXstation 3100 (Model 38) System 35

NOTE
The RX23 drive plate lever may have shipping material under
it. If it does, remove the shipping material and discard it
before performing the next step.
3. Simultaneously press down on the drive plate lever under the RX23
and slide the drive toward the lever until you can lift the drive from
the plate.
4. Locate the SCSI ID switches 1, 2, and 3 on the side of the RX23 as
shown in (Figure 4-9).
Record the SCSI ID switch positions so you can set the ID switches
on the replacement RX23 to the same positions. Usually, the switches
are set to 5, as shown in (Figure 4–9).
Mounting Screws (2)

Mounting Screws (2)

Switches Positions:
SCSI ID 5
Up (Off)
Down (On)
1

2 3

MLO-002886

MA-X0851-89

Figure 4–9

RX23 SCSI ID Switch Location

5. To install the new RX23 drive, reverse the removal procedures in
Section 4.6.

36 VAXstation 3100 (Model 38) System

4.7 Drive Plate Removal
You do not have to remove any devices mounted on the drive plate to
remove the drive plate from the system box.
To remove the drive plate:
1. Remove the system box cover (Section 4.3).
2. If the drive plate has devices mounted on it, complete all the following
steps. If the drive plate has no devices mounted on it, proceed to
step 6.
3. Disconnect the internal power cable, pn 17–02440–01, from the power
supply (Figure 4-10).
4. Disconnect the SCSI cable, pn 17–02223–01, that goes from the MSC
module to the system module.
5. Disconnect the SCSI terminator or the external SCSI cable from the
SCSI port on the back panel.
6. Loosen the five captive screws and the three slide mount screws on
the drive plate as shown in (Figure 4–10). Do not remove the screws
from their mountings.
7. Slide the drive plate (with the drives) forward approximately 1/2 inch
and then lift it up and off the system box. Set the plate aside.

VAXstation 3100 (Model 38) System 37

Re mo ve
MSC
Ca b le

Re mo ve
Internal
Power Cable

Captive
Screws (2)
Power Supply Cable
Captive Screws (3)

Drive Plate

Slide Mount Screws (3)
Slide Mount Openings
MLO-002905

MA-X0863-89

Figure 4–10

Removing the Drive Plate

38 VAXstation 3100 (Model 38) System

4.8 MSC Module Removal
To remove the MSC module:
1. Remove the system box cover (Section 4.3).
2. Disconnect three cables (Figure 4–11):
•

The cable, pn 17–02223–01, between the MSC module and the
system module

•

The cable, pn 17–02439–01, connected to SCSI port A

•

The cable, pn 17–02212–01, connected to SCSI port B

3. Disconnect the external SCSI connector cable or the terminator from
the external SCSI port on the back panel.
4. Unscrew the captive screw on the MSC module and release the
module from the standoffs.
5. Remove the MSC module from the drive plate by sliding it forward
and away from the back of the drive plate.
6. To install a new MSC module, reverse the removal procedures in
Section 4.8.

VAXstation 3100 (Model 38) System 39

MSC Cable
SCSI Signal Cable

SCSI Controller
Connector
SCSI Port A
Connector
External SCSI
Port Connector

Standoffs

SCSI Port B
Connector

Standoffs

MLO-002908

MA-X0864-89

Figure 4–11

Removing the MSC Module

40 VAXstation 3100 (Model 38) System

4.9 Graphics Coprocessor Module Removal
To remove the graphics coprocessor module:
1. Remove the system box cover (Section 4.3).
2. Remove the drive plate (Section 4.7).
3. Remove the graphics coprocessor module from the four standoffs
(Figure 4–12).
4. Grasp the module near the two connectors under the module and lift
it off the system module.

Standoffs

St andof f

Graphics Coprocessor
Module
Connectors Underneath
Module

Standoffs
MLO-002914
MA-X0870-89

Figure 4–12

Removing the Graphics Coprocessor Module

5. To install a new graphics module, reverse the removal procedures in
Section 4.9.

VAXstation 3100 (Model 38) System 41

4.10 Memory Module Removal
To remove a memory module:
1. Remove the system box cover (Section 4.3).
2. Remove the drive plate (Section 4.7).
3. Whether you have one or two memory modules, the removal procedure
is the same. Lift the module(s) from the four standoffs and the two
connectors under the module by grasping the module(s) close to the
connectors (Figure 4–13).

St andof f
Standoffs

Connectors Underneath
Module
Memory Module
Standoffs
MLO-002912

MA-X0868-89

Figure 4–13

Removing Memory Modules

42 VAXstation 3100 (Model 38) System

4. If you have paired memory modules, remove the two E-clips and
separate the 8- or 16-megabyte module from the 4- or 12-megabyte
module below it (Figure 4–14).
8 or 16 Megabyte
Memory Module

"E" Clips (2)

4 or 12 Megabyte
Memory Module

MLO-002913
MA-X0869-89

Figure 4–14

Separating Paired Memory Modules

5. To replace the new memory module, reverse the procedures in Section
4.10.

4.11 System Module Removal
To remove a system module:
1. Disconnect all cables from the back of the system box.
2. Remove the system box cover (Section 4.3).
3. Remove the drive plate (Section 4.7).
4. Remove the memory module(s) from the system (Section 4.10).
5. Remove the graphics coprocessor module (if installed) from the system
(Section 4.9).
6. Disconnect the MSC cable from the system module (Figure 4–15).

VAXstation 3100 (Model 38) System 43

MSC
Cable

Connector Latch
MSC
Cable

System Module
SCSI Connector

System Module
System Module
SCSI Connector
MLO-003308

MA-X0875-89

Figure 4–15

Removing the MSC Cable from the System Module

7. Disconnect the power cable and the battery cable from the system
module (Figure 4–16).

44 VAXstation 3100 (Model 38) System

Panhead Screws (5)

Power Cable

Panhead Screws (3)

Locating Post

Battery Cable

Locating Post
MLO-002916

MA-X0871-89

Figure 4–16

Removing the System Module

8. Remove the eight panhead screws from the system module as shown
in (Figure 4–16).
9. Remove the system module by carefully popping up the two front
corners and off the two locating posts.
10. Slide a small screwdriver under each end of the Ethernet ID ROM
and carefully lift the ends until you can remove the ROM from the
system module. (Figure 4–17) shows the Ethernet ID ROM.

VAXstation 3100 (Model 38) System 45

Ethernet
ID ROM
Key

Ethernet
ID ROM

MLO-002918

MA-X0872-89

Figure 4–17

Removing the Ethernet ID ROM

CAUTION
Do not bend the pins on the ROM. You must add this ROM to
the replacement system module.
Replacing the System Module
To replace the system module:
1. Remove the Ethernet ID ROM from the new system module and
reinstall it on the old system module.
2. Take the Ethernet ID ROM you removed from the old system module
and insert it in the new system module. Use (Figure 4–17) as a
reference.

46 VAXstation 3100 (Model 38) System

3. Place the new system module in the system box making sure the
connectors slide through the openings in the rear of the system box as
shown in (Figure 4–18).
Panhead Screws (5)

Power Cable

Panhead Screws (3)

Locating Post

Battery Cable

Locating Post
MLO-003309

MA-X0873-89

Figure 4–18

Installing the System Module

4. Push the module toward the back of the box until the front set of
holes on either side of the module fit on the two locating posts on
the bottom of the box. You must apply some pressure because of the
elasticity of the connector shieldings surrounding the connectors at
the back of the module. Snap the module on the locating posts.
5. Check that the screw holes are aligned. Install and tighten the eight
panhead screws.
6. Plug in the battery cable.
7. Plug in the power cable on the system module.
8. Connect the MSC cable to the MSC connector on the system module.
9. Reinstall the drive plate in the system box.
10. Connect the MSC cable to the MSC module.
11. Connect the power cable to the drive’s power cable harness.
12. Reinstall the system box cover.

VAXstation 3100 (Model 38) System 47

4.12 Battery Pack Removal
To remove a battery pack:
1. Remove the system box cover (Section 4.3).
2. Remove the drive plate (Section 4.7).
3. Disconnect the battery cable from the system module (Figure 4–19).

BATTERY
CABLE

BATTERY
PACK
MA-X0807-88

Figure 4–19

Battery Cable Location

4. Remove the battery pack from its holder.
NOTE
A new battery needs a minimum of 25 hours of continuous
power to fully charge the battery. If the battery’s charge is
low, you will see an error for the NVR (0000.0005) when you
power up the system.

48 VAXstation 3100 (Model 38) System

4.13 Power Supply Removal
To remove a power supply:
1. Remove the system box cover (Section 4.3).
2. Remove the drive plate (Section 4.7).
3. Disconnect the power cable from the system module.
4. Unscrew the four screws (Figure 4–20).

CAPTIVE SCREW

POWER SUPPLY
CAPTIVE SCREW
ALLEN-HEAD BOLTS

MA-X0808-88B

Figure 4–20

Power Supply Screw Locations

5. Lift the power supply out of the system box.

VAXstation 3100 (Model 38) System 49

4.14 Keyboard Disconnection
CAUTION
Do not remove or unplug the keyboard, the mouse or tablet device
without turning the power off.
Unplug the keyboard cable from the rear of the system box or from the
monitor end of the video cable (Figure 4–21).
NOTE
The keyboard is a single FRU. Do not try to remove the keycaps
or disassemble the keyboard.

COMMUNICATION
PRINTER
MOUSE
KEYBOARD

MA-X0809-88

Figure 4–21

Keyboard, Mouse or Tablet, and Printer Disconnection

50 VAXstation 3100 (Model 38) System

4.15 Mouse and Tablet Disconnection
Disconnect the mouse or tablet from the back of the system box or from
the monitor end of the video cable (Figure 4–21).
NOTE
The mouse and the tablet are single FRUs. Do not try to
disassemble them.

4.16 Printer Disconnection
To disconnect a printer:
1. Switch the printer’s power switch off.
2. Disconnect the printer cable from the back of the system box
(Figure 4–21) or from the back of the printer.
3. Refer to the specific printer’s pocket service guide for troubleshooting
and removal and replacement procedures for the printer.

5
VAXstation 3100 (Model 48) System
5.1 System Contents
The VAXstation 3100 model 48 (WS42B-xx) consists of the system box,
monitor, mouse or tablet, and keyboard. The label on the back of the
system box indicates which model you are working on. The WS42A-xx
model number on the label identifies the VAXstation 3100 model 38
system and the WS42B-xx model number identifies the VAXstation 3100
model 48 system.
The system box contains several field replaceable units (FRUs): the
system module, one or two memory modules, a graphics module, a power
supply, a mass storage controller (MSC) module and up to five internal
mass storage devices (TZ30 tape drive, RRD40 compact disk drive, and
one to three RZ22 or RZ23 disk drives).
There are four expansion boxes available that contain additional mass
storage devices. They are:
•

TK50Z-GA storage expansion box

•

RZ55 storage expansion box

•

RZ56 storage expansion box

•

RRD40 storage expansion box

There are seven monitors available. The keyboard is an LK201 keyboard.
The seven monitors are:
•

VR160 color monitor

•

VR290 color monitor

•

VR297 color monitor

•

VR299 color monitor
51

52 VAXstation 3100 (Model 48) System

•

VR150 monochrome monitor

•

VR260 monochrome monitor

•

VR262 monochrome monitor

Figure 5–1 shows the VAXstation 3100 model 48 system box.

EXTERNAL
SCSI
PORT

NET
SELECT
INDICATORS

STANDARD
Ethernet

ThinWire
Ethernet
PORT

Ethernet

HALT

SWITCH

BUTTON

PORT

KEYBOARD
PORT

MOUSE/
TABLET

VIDEO
PORT

PRINTER
PORT

COMM
PORT

SWITCHED
AC OUTLET

LEDS

PORT

VAXstation 3100 M48

MA-X0811-88A

Figure 5–1

VAXstation Model 48 System Box

VAXstation 3100 (Model 48) System 53

The position of the Ethernet switch determines which of the Ethernet
ports provides IEEE 802.3 network communications. An LED is lit next
to the enabled port. The keyboard is connected to the keyboard port either
on the back of the system box or on the monitor end of the video cable.
The mouse or tablet is connected to the mouse port either on the back
of the system box or on the monitor end of the video cable. The external
SCSI port is for connecting external mass storage devices to the system.
The monitor or an external mass storage device can be plugged in the
switched ac outlet.
The S3 switch next to the LEDs on the back of the system module controls
the console port. When the S3 switch is in the down position, it enables
the monitor connected to the monitor port to be the console. When the S3
switch is in the up position, it enables a terminal connected to the printer
port to be the console.

5.2 FRU Removal and Replacement
The only new FRU in the model 48 system is a new system module.
However, since this system module and all of the other FRUs are removed
and installed the same way as the FRUs in the VAXstation 3100 model
48, all removal and replacement procedures for the VAXstation 3100
model 48 are covered in Chapter 5 of the VAXstation 3100 Maintenance
Guide (VAXstation 3100 (Model 48) System).

6
RZ56 Storage Expansion Box
This chapter describes the RZ56 storage expansion box. The RZ56 disk
drive is stored in the BA42 enclosure as shown in (Figure 6–1).

MA-X0563-89

Figure 6–1

BA42 Enclosure with One or Two RZ56 Disk Drives

For additional information on the RZ56 drive, refer to the RZ56 Disk
Drive Service Manual (EK-RZ56D-SV).

RZ56 Storage Expansion Box 55

6.1 General SCSI Bus Configuration Information
The following is general information on the SCSI bus:
•

The external SCSI port on the back of the system box can be
connected with one to six drives. However, system performance is
slower when more than four drives are connected.

•

The BA42 enclosure storage expansion box can contain one or two
drives. Make sure you configure the second drive’s SCSI ID if the box
contains a second drive.

•

The maximum distance for the cable between the external SCSI port
and the last storage expansion box is 18 feet (6 meters).

•

The SCSI ID address determines the priority of devices on the SCSI
bus. SCSI ID 7 is the highest priority and SCSI ID 0 is the lowest
priority.

6.2 Connecting the RZ56 in a BA42 Storage
Expansion Box
The BA42 storage expansion box connects to the system box through
the external SCSI port. (Figure 6–2) and (Figure 6–3) show how the
BA42 storage expansion box connects to the system box. The SCSI cable
connects to either of the two ports on the back of the expansion box.
However, the SCSI terminator must be installed on the unused connector
unless another expansion box is daisy-chained. If the SCSI port already
has a box connected to it, use another cable to connect the new storage
expansion box to the last box on the daisy chain. Be sure to move the
terminator on the unused connector on the back of this last storage
expansion box in the daisy chain.

56 RZ56 Storage Expansion Box

(Figure 6-2) shows how the BA42 storage expansion box connects to the
system box.

S CS I
TE R M IN A TO R

TO
SYSTEM
BOX
MA-X0564-89

Figure 6–2

BA42 Enclosure Connection

RZ56 Storage Expansion Box 57

(Figure 6-3) shows how the BA42 storage expansion box connects to the
system box.

SC SI
TERMIN ATOR

TO
SYSTEM
BOX
MA-X0960-89

Figure 6–3

BA42 Enclosure Daisy-Chained

6.3 Troubleshooting the BA42 Enclosure
To troubleshoot the RZ56 disk in the BA42 storage expansion box, use the
self-test and system exerciser diagnostics in the system box.
Self-Test Results
The following table lists the normal self-test results for the RZ56 disk
drive. Any code other than those listed indicates either an error with
the drive, a cabling problem, or an error with the SCSI bus controller on
the MSC module. An additional RZ56 drive storage expansion box can
be installed at address ID 1, 2, or 3 if no internal drives connect to these
SCSI address IDs on the external SCSI bus.

58 RZ56 Storage Expansion Box

Code

Description

00000001

Good results. There is no error for the drive located at the SCSI
address ID. The SCSI ID is set by depressing the switches on the
back of the storage expansion box (should be ID 0 and/or ID 1).

FFFFFF03

This code is reserved for the SCSI bus controller and should never
appear in the drive’s SCSI ID address. If this code does appear in
the ID address of the drive, check the SCSI ID settings on all drives,
then replace the MSC module if each drive is set properly.

FFFFFF05

The drive is either not installed, not powered up, not connected to
the SCSI port properly, or is faulty.

FFFFFFFF

The drive was not tested because of a fault with the SCSI bus
controller on the MSC module.

System Exerciser Results
The following table shows the results of the system exerciser when in
the field service mode. The code for the drive shows that it is writable
and that no errors are present. Any error code other than those listed
indicates there is most likely an error on the disk, but never rule out the
possibility of an error on the SCSI bus controller itself.
Code

Result

Drive location

0200.0001

No error

SCSI address ID 01

1200.0001

No error

SCSI address ID 11

2200.0001

No error

SCSI address ID 21

3200.0001

No error

SCSI address ID 31

4200.0001

No error

SCSI address ID 41

1 The SCSI ID is set by the switches on the back of the storage expansion box.

If the Tests Indicate an Error
If the tests indicate an error:
1. Make sure the storage expansion box has power and is switched on.
2. Make sure the SCSI port cable connects properly to the back of the
RZ56 storage expansion box and to the external SCSI port on the
system box, or to the previous storage expansion box.

RZ56 Storage Expansion Box 59

3. Make sure the SCSI terminator is installed on the unused connector
on the back of the expansion box or that the cable is secured to the
next daisy-chained box.
4. Run the tests again.
5. If the problem returns, then disconnect the RZ56 storage expansion
box from the daisy chain or from the external SCSI port if no other
boxes are connected. Install the SCSI terminator on the external
SCSI port, make sure the last storage expansion box is terminated
properly, and run a self-test (TEST 6).
6. If the status code is not FFFFFF05 for the address ID switches of the
two RZ56 drives in the storage expansion box (normally address ID 1
and 0), then check the SCSI address IDs of all drives on the bus for
proper settings. If the address IDs are set correctly and the status is
not FFFFFF05, replace the MSC module .
7. If the status code is FFFFFF05, then check the address ID switches
on the back of the storage expansion box to make sure they are set
properly. Refer to (Figure 6–13) to check for proper SCSI ID switch
settings.
8. If the address ID and drive select jumpers are set properly, then a
fault in the storage expansion box exists.
9. Remove the cover to the storage expansion box and check the internal
cabling for good connections.
10. Power up the storage expansion box and listen for the fans and the
drives to spin up. If the fans do not spin or the drives do not hum,
then replace the power supply, reconnect the box to the SCSI port,
and retest.
11. If the power supply operates normally, then replace the RZ56
electronics module on the faulty drive, reconnect the box to the SCSI
port, and retest.
12. If replacing the RZ56 electronics module did not fix the problem,
replace the HDA assembly on the RZ56 drive, reconnect the box to the
SCSI port, and retest.
13. If replacing the HDA on the RZ56 drive did not fix the problem, then
replace the SCSI switch module, reconnect the box to the SCSI port,
and retest.

60 RZ56 Storage Expansion Box

14. If a problem still exists, then check the internal SCSI cable’s connector
for damaged pins or cut wires. Check the external SCSI cable for
damaged connector pins or cut wires. If the cables appear normal,
then replace the MSC module in the system box.

6.4 BA42 Enclosure FRU Removal and
Replacement
To use this section, find the name of the FRU that needs replacing in
Table 6–1; then go to the section listed beside the FRU. Follow the steps
in the section to remove the FRU, and reverse the procedures to replace
the FRU.
CAUTION
Wear a static wrist strap and use a static mat when you replace a
FRU.
Table 6–1 BA42 Enclosure FRU Section Listings
FRU

Section

Power supply

6.4.5

RZ56 disk drive and electronics module

6.4.1

SCSI ID switch module

6.4.4

BA42 Enclosure FRU Locations
The BA42 enclosure storage expansion box contains one or two RZ56
drives. Each drive consists of an RZ56 electronics module and an HDA
assembly. The expansion box also contains an SCSI ID switch module and
a power supply.

RZ56 Storage Expansion Box 61

(Figure 6–4) shows the locations of the FRUs in the BA42 enclosure
storage expansion box.
POWER
SUPPLY
RZ56
DISK
DRIVES
SCSI ID
M ODULE

MA-X0567-89A

Figure 6–4

BA42 Enclosure FRU Locations

6.4.1 RZ56 Disk Drive Removal
The following section describes the removal and replacement procedures
for the RZ56 and its electronics module. If you have already replaced
the drive’s electronics module and a problem still exists, then you must
replace the whole drive instead of replacing just the electronics module.
1. Switch off the power to the expansion box.

62 RZ56 Storage Expansion Box

2. Unscrew the two cover screws and remove the expansion box cover
(Figure 6–5).

COVER
SCREWS
MA-X0568-89

Figure 6–5

BA42 Enclosure Cover Screws

RZ56 Storage Expansion Box 63

3. Unscrew the drive mounting screw on the drive you need to replace
(Figure 6–6).

POWER
SUPPLY

R Z 56

MO U N T I N G
S C R E WS
MA-X0961-89

Figure 6–6

BA42 Enclosure Drive Mounting Screw

4. Tilt the drive up and lift it off of the mounting plate; then disconnect
the data cable, SCSI switch cable, and the power cable from the back
of the drive. Remove the drive from the expansion box.

64 RZ56 Storage Expansion Box

5. Remove the four mounting screws (Figure 6–7) and the mounting
bracket from the drive.

MA-X0570-89

Figure 6–7

RZ56 Mounting Bracket Screws

RZ56 Storage Expansion Box 65

NOTE
If you have already replaced the electronics module on the
drive, stop here and replace the whole drive. Otherwise,
replace the electronics module as described in Section 6.4.2.
Reinstalling the RZ56 Drive
To reinstall the RZ56 drive:
1. Install the four screws (Figure 6–7) that attach the mounting bracket
on the drive.
2. Set the drive in its mounting position and connect the cables to the
back of the drive (Figure 6–8).
SCSI
ID

DATA

P OWE R
S UP PL Y
RZ56

RZ56

POW ER
MA-X0962-89

Figure 6–8

BA42 Enclosure Drive Cables

66 RZ56 Storage Expansion Box

3. Mount the drive in the drive’s mounting holes and secure by
tightening the mounting screw (Figure 6–9).

MO UNT
HO LES
MO UNT
HO LES
MA-X0963-89

Figure 6–9

BA42 Enclosure Drive Mounting Position

4. Install the cover and tighten the two cover screws.

6.4.2 Removing the Drive’s Electronics Module
Before you can remove the electronics module, you must remove the drive
from the storage box. Refer to Section 6.4.1 to remove the drive from the
storage box.
Removing the Bezel
To remove the bezel:
1. Orient the drive with the module face up, and turn the drive so the
bezel is facing away from you as shown in (Figure 6–10).

RZ56 Storage Expansion Box 67

LED FLEX CABLE
CONNECTOR

LOCKING PINS

FRAME SLOTS

BEZEL CLIPS

LE
DU X
MO -X
E XX
IV XX
D R9 - X
2
E
AM
FR X
H -X
IT XX
(W X
A -XX
HD 29

MA-X0964-89

Figure 6–10

RZ56 Drive Bezel Removal

2. Unplug the LED flex cable from J11.
3. Hold the sides of the bezel with the palms of your hands with your
fingers resting on the front of the bezel. Next, position your thumbs
on the back of the bezel above the locking pins.
4. Carefully apply outward pressure to the bezel with your thumbs until
the two bezel locking pins clear the holes in the frame. Note that the
bezel must flex about 1/8 inch to clear the pins.
5. While the bezel is flexed, slide it upward until movement stops (about
3/8 inch). This frees the upper bezel clips from the upper frame slots.
6. Push the bezel away from the drive. This frees the lower bezel clips
from the lower frame slots and releases the bezel.

68 RZ56 Storage Expansion Box

Removing the Drive Module
To remove the drive module:
1. Remove the screws labeled 1 , 2 , 3 , and 4 (Figure 6–11).
4
3

MA-X0965-89

Figure 6–11

RZ56 Drive Module Removal

2. Unplug the spindle motor connector at J5.

RZ56 Storage Expansion Box 69

NOTE
When setting the drive back on the work surface, put a
support under the drive to protect the loose connectors.
3. Lift the drive module up and off of the drive.
4. Unplug the preamplifier cable connector at the drive module
connector.
Installing the Drive Electronics Module
To install the drive electronics module:
1. Install the new module by reversing the previous procedure.
2. Check the new module to be sure the jumpers are set to the same
position as on the old module you just removed.

6.4.3 Removing the Drive’s HDA Assembly
To remove the drive’s HDA assembly:
NOTE
Perform this procedure only after you have replaced the drive’s
electronics module.
1. Remove the bezel as described in Section 6.4.2.
CAUTION
Use care when handling the drive. Be sure not to touch the
exposed face of the drive module. When setting the drive back
on the work surface, put a support under the drive to protect
the loose preamplifier cable and connector.
2. Remove the drive module as described in Section 6.4.2.
3. Remove the old HDA (with frame) and replace it with a new HDA
(with frame). Do not remove the HDA from the frame.
4. Reverse the removal procedures to reassemble the drive and reinstall
it in the BA42 enclosure.

70 RZ56 Storage Expansion Box

6.4.4 BA42 Enclosure SCSI ID Switchboard
The SCSI ID switchboard is on the inside back wall of the expansion box.
It contains two switch packs. It connects to the smaller connectors on the
RZ56 drives by a cable. Follow this procedure to remove the switchboard,
and reverse the procedure to install it.
1. Switch off power to the expansion box.
2. Unscrew the two cover screws and remove the expansion box cover
3. Disconnect the cable from the SCSI ID switchboard (Figure 6–12).

SCSI
S WIT C H
MO D U LE

MA-X0573-89

Figure 6–12

BA42 Enclosure SCSI ID Switchboard Location

4. Remove the SCSI ID switchboard from the two standoffs and lift the
board from the expansion box.

RZ56 Storage Expansion Box 71

5. Set the switch settings on the new SCSI ID switchboard to the same
position as on the old board you just removed. (Figure 6–13) shows
the switch settings.
SCSI
S W IT C H E S

MA-X0574-89

Figure 6–13

BA42 Enclosure SCSI ID Switch Setting

The following table shows the SCSI address ID that each switch
setting represents:

Address ID on

BA42 Enclosure Storage Expansion Box Switch
Settings

SCSI Bus

Open

Closed

Open

Closed

Open

1 Recommended address IDs for the first BA42 enclosure expansion box.

2 Recommended address IDs for the second BA42 enclosure expansion box.

72 RZ56 Storage Expansion Box

Address ID on

BA42 Enclosure Storage Expansion Box Switch
Settings

SCSI Bus

Open

Closed

Open

Closed

Open

Closed

Open

Closed

2 Recommended address IDs for the second BA42 enclosure expansion box.

3 Reserved address ID for SCSI bus controller.

6.4.5 BA42 Enclosure Power Supply Removal
To remove the BA42 enclosure power supply:
1. Switch off power to the expansion box.
2. Unscrew the two cover screws and remove the expansion box cover
(Figure 6–5).
3. Disconnect the power cable that comes out of the power supply from
the power cable that connects to the drives.
4. Unscrew the four power supply screws (Figure 6–14).

RZ56 Storage Expansion Box 73

CA P T I V E
S CRE WS

SCREW S (2 )

CAPT IVE
SCREW S

MA-X0575-89

Figure 6–14

BA42 Enclosure Power Supply Screws

5. Lift the power supply out of the expansion box.
6. Replace the power supply by reversing the previous procedure.

A
Recommended Spares List
Part
Number

Description

Quantity

VAXstation 3100 models 38 and 48 FRUs (FRUs common to all models)
54-19356-01

VAXstation models 38 and 48 system module
(KA42-BA)

54-19356-02

VAXstation models 30 and 40 system module
(KA42-AA)

54-18287-AA

4 Mbyte memory module (MS42-AA)

54-19051-AA

4 Mbyte memory module (MS42-AB)

54-19830-AA

8 Mbyte memory module (MS42-KA)

54-18287-BA

12 Mbyte memory module (MS42-BA)

54-18324-AA

16 Mbyte memory module (MS42-CA)

54-17445-05

SCSI/SCSI MSC module (VS42X-RD)

54-17282-01

8-plane graphics coprocessor module (VS40XPA)

RZ22-E

52 Mbyte SCSI disk drive with logic module

RZ23-E

104 Mbyte SCSI disk drive with logic module

29-27240-01

RZ22/RZ23 module/frame assembly

TZ30-AX

TZ30 95 Mbyte tape drive

17-02223-01

Internal MSC cable (from system module)

12-19245-00

5 Vdc battery pack

Recommended Spares List 75

Part
Number

Description

Quantity

VAXstation 3100 model 38 FRUs (FRUs for model 38 systems only)
H7821

Power supply

70-26724-01

RX23 with SCSI adapter assembly (RX23-AA)

17-02221-02

RX23 data cable (connects RX23 to SCSI
adapter module)

17-02440-01

Internal power cable

17-02212-01

Internal SCSI-B bus data cable

17-02439-01

Internal SCSI-A bus data cable

VAXstation 3100 model 48 FRUs (FRUs for model 48 systems only)
H7822

Power supply

17-02232-01

Dual device SCSI cable

17-02231-01

Triple device SCSI cable

17-02225-01

Internal power cable (lower drives)

17-02219-01

Internal power cable (upper drives)

RRD40-AA

RRD40 compact disk drive with adapter board

VAXstation 3100 models 38 and 48 (loopbacks, terminators, and external cables)
17-01992-01

BC23J-03 color monitor cable (short)

17-01993-01

BC23K monochrome monitor cable (short)

17-01480-01

BC19S color monitor cable (long)

17-00568-01

BC18P monochrome monitor cable (long)

17-00606-10

System power cord (USA)

17-00442-26

System to monitor power cord

17-02008-01

68 to 50 pin external SCSI port cable

17-01351-01

50 to 50 pin SCSI cable

17-01351-04

50 pin SCSI cable (18 inches)

76 Recommended Spares List

Part
Number

Description

Quantity

12-22196-01

Standard Ethernet loopback

12-25869-01

ThinWire Ethernet T-connector

12-26318-01

ThinWire Ethernet cable 50-ohm terminator

12-25083-01

MMJ loopback connector (H3103)

12-29635-01

68 pin external SCSI port terminator

12-30552-01

50 pin SCSI terminator (expansion box)

17-00811-03

BC16E-25 DECconnect office cable (25 feet)

17-00811-04

BC16E-50 DECconnect office cable (50 feet)

RZ55 Disk Expansion Box FRUs
54-19325-01

SCSI ID switch board

17-02299-01

SCSI ID switch cable

17-01249-01

Internal data cable

17-01090-01

Internal data cable

17-00342-01

Internal power supply extension cable

H7848-BA

Power supply (120 Vac)

H7848-AB

Power supply (240 Vac)

54-17163-01

Resistor load board

17-00606-10

Power cord (USA)

RZ55-E

RZ55 disk drive

29-27347-01

RZ55 logic module

RZ56 Disk Expansion Box FRUs
54-19325-02

SCSI ID switch module

17-02445-01

SCSI ID switch cable

17-02447-01

Internal power supply cable w/resistor

17-02444-01

Internal data cable

H7821-00

Power supply

Recommended Spares List 77

Part
Number

Description

Quantity

17-00606-10

Power cord (USA)

29-2789001.A01

RZ56 HDA

29-2788901.A01

RZ56 PCB

TK50Z-GA Tape Expansion Box FRUs
54-19325-01

SCSI ID switch board

17-02299-01

SCSI ID switch cable

17-01247-02

Internal I/O cable (TK50 to TZK50)

17-01249-01

Internal data cable (TZK50 to external
connector)

17-01397-01

Internal load board power extension cable

17-00342-01

Internal power supply extension cable

H7848-BA

Power supply (120 Vac)

H7848-AB

Power supply (240 Vac)

54-17163-01

Resistor load board

17-00606-10

Power cord (USA)

TK50-AX

TK50 tape drive

54-17639-01

TZK50 controller board (TZK50-AA)

RRD40 Compact Disk Expansion Box FRUs
RRD40-DA

RRD40 compact disk expansion box (with SCSI
interface)

Miscellaneous Parts
LK201-A

Keyboard (USA keycaps)

17-01480-01

VSXXX-AA mouse

29-25997-00

Tablet assembly

78 Recommended Spares List

Part
Number

Description

Quantity

30-23507-03

RRD40 test disk

29-27338-01

RRD40 empty caddy

30-20515-01

TK50 blank media

30-25145-05

RX23 blank media

29-25995-00

Stylus

29-25996-00

Puck

29-25992-00

Mouse ball

29-25993-00

Mouse door

A2-M1329-10

Color maintenance kit (two 75-ohm terminators
29-26899-00)

Index
B
BA42 Enclosure Storage Expansion
Box
FRU Removal and Replacement,
60
Power Supply, 72
RZ56 Disk Drive, 61
SCSI ID Switch Board, 70

Halt Button (cont’d.)
Location, 26, 52
HDA Removal
RZ56 disk drive, 69

L
Locating Failed Memory Bank, 11
Loopback Connectors, 5

Diskette Formatter, 18
Messages, 19
Disk Formatter
Diskette Example, 18
Drive Module Removal
RZ56 disk drive, 68
Drive plate
removal, 36

Memory modules
removal, 41
Model 38
Enclosure Description, 25
FRU Removal and Replacement
Procedures, 27
Battery Pack, 47
Keyboard, 49
Mouse and Tablet, 50
Power Supply, 48
Model 48
Enclosure Description, 51
FRU Removal and Replacement
Procedures, 53
MSC module
removal, 38

E
Ethernet ID ROM
removing/replacing, 44

G
Graphics coprocessor module
removal, 40

H
Halt Button

P
Power-up Testing
Example Display, 2
Summary Display, 2

Index 1

2 Index

Power-Up Testing
Error Codes, 2

R
Recommended Spares List, 74
Related Documents, viii
RX23 diskette drive
removal, 33
RZ22/24 disk drive
removal, 29
RZ56 disk drive
Drive Module Removal, 68
HDA Removal, 69
RZ56 disk drive module removal, 68
RZ56 Expansion Box, 54
BA42 Enclosure Troubleshooting,
57
RZ56 Storage Expansion Box
BA40 Enclosure, 55

S
SCSI Device
SCSI-A System Exerciser Code,
15
Self-test
Error Codes, 6
Example Display, 5
Self-Test
Using Loopback Connectors, 5
Self-test Commands, 3
Self-Test Commands, 5
Special Key for System Exerciser
Diskette Example, 23
Special Key on Diskettes for System
Exerciser, 23
System Exerciser
Commands, 7
Error Codes, 8
System Exerciser Diagnostics, 6
System module
removal, 42
replacing, 45

T
Testing, 1
Power-Up, 2
Self-test, 5
Self-Test Commands, 5
System Exerciser, 6
Tools Required, viii
Troubleshooting, 9
Memory (MEM), 9
RX23 Self-Test, 13
RX23 Self-Test Results, 13
RX23 System Exerciser, 15
RZ56 Disk Storage Expansion
Box, 57
TZ30 tape drive
removal, 32

U
Utilities, 17
Commands, 17
Diskette Formatter, 18
Special Key on Diskettes for F.S.
System Exerciser, 23

V
VAXstation 3100 Model 38
Connectors, 26
VAXstation 3100 model 48
Connectors, 52