Digital Equipment VAX 4000 Guide

VAX4000
BA42BEnclosureMaintenance
Order Number: EK–472AB–MG. B01
August 1994
This manual provides reference, installation, and maintenance information
for the BA42B Enclosure used with the VAX 4000 Model 100/100A/105A
systems.
Digital Equipment Corporation
Maynard, Massachusetts

August, 1994
Digital Equipment Corporation makes no representations that the use of its products in the
manner described in this publication will not infringe on existing or future patent rights, nor do
the descriptions contained in this publication imply the granting of licenses to make, use, or sell
equipment or software in accordance with the description.
© Digital Equipment Corporation 1994. All Rights Reserved.
The postpaid Reader’s Comments forms at the end of this document request your critical
evaluation to assist in preparing future documentation.
The following are trademarks of Digital Equipment Corporation: DEC, Digital, MicroVAX,
OpenVMS, Q–bus, ThinWire, TK, VAX, VAX DOCUMENT, VT, and the DIGITAL logo.
All other trademarks and registered trademarks are the property of their respective holders.
S2484
This document was prepared using VAX DOCUMENT Version 2.1.

Contents
Preface ..................................................... xi
1 Enclosure Description
1.1 Mass Storage Device Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
1.2 Controls, Indicators, Ports, and Connectors . . . . . . . . . . . . . . . . . 1–3
1.3 Power and Signal Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–9
1.4 AirCirculation....................................... 1–11
1.5 Configuration Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–12
1.5.1 Memory Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–12
1.5.2 Communications Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–15
1.5.3 MassStorageDevices............................... 1–17
2 Installation Procedures
2.1 PreparingtheSite .................................... 2–1
2.1.1 EnclosureDimensions .............................. 2–1
2.1.2 AdditionalEquipment .............................. 2–2
2.1.3 Operating Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–3
2.1.4 Electrostatic Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–3
2.1.5 HeatDissipation .................................. 2–3
2.1.6 Temperature, Humidity, and Altitude Ranges . . . . . . . . . . . . 2–4
2.1.7 Electrical Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4
2.2 UnpackingtheSystem................................. 2–5
2.3 Installing the BA42B System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–7
2.3.1 Installing a BA42B-Based VAX 4000 Model 100 . . . . . . . . . . 2–7
2.3.1.1 Identifying the Ports and Connectors on the System . . . . 2–7
2.3.1.2 Connecting the Console Terminal . . . . . . . . . . . . . . . . . . . 2–7
2.3.1.3 Connecting the ThinWire Terminator or Loopback
Connector..................................... 2–10
2.3.1.4 Connecting the SCSI Terminator . . . . . . . . . . . . . . . . . . . 2–13
2.3.1.5 Connecting the DSSI Terminator . . . . . . . . . . . . . . . . . . . 2–14
2.3.1.6 Connecting the System Unit Power Cord . . . . . . . . . . . . . 2–15
iii

2.3.1.7 Turning On the System . . . . . . . . . . . . . . . . . . . . . . . . . . 2–16
2.3.2 Installing a BA42B-Based VAX 4000 Model 100A/105A . . . . . 2–17
2.3.2.1 Identifying the Ports and Connectors on the System . . . . 2–17
2.3.2.2 Connecting the Console Terminal . . . . . . . . . . . . . . . . . . . 2–17
2.3.2.3 Connecting the ThinWire Terminator or Loopback
Connector..................................... 2–20
2.3.2.4 Connecting the SCSI Terminator . . . . . . . . . . . . . . . . . . . 2–23
2.3.2.5 Connecting the DSSI Terminator . . . . . . . . . . . . . . . . . . . 2–24
2.3.2.6 Connecting the System Unit Power Cord . . . . . . . . . . . . . 2–25
2.3.2.7 Turning On the System . . . . . . . . . . . . . . . . . . . . . . . . . . 2–26
3 Removing and Replacing Field Replaceable Units
3.1 Removing the Enclosure Cover . . . . . . . . . . . . . . . . . . . . . . . . . . 3–5
3.2 Removing an MS44 or MS44L Memory Module . . . . . . . . . . . . . . 3–6
3.3 Removing the Upper Drive-Mounting Shelf . . . . . . . . . . . . . . . . . 3–9
3.4 Removing the RX26 Diskette Drive Assembly . . . . . . . . . . . . . . . 3–13
3.4.1 Removing the RX26 FDI/SCSI Board . . . . . . . . . . . . . . . . . . . 3–14
3.4.2 Separating the RX26 Diskette Drive from the Mounting
Bracket ......................................... 3–15
3.4.3 Setting the SCSI ID on the Replacement RX26 FDI/SCSI
Board........................................... 3–16
3.5 Removing a TZ30 Tape Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–19
3.5.1 Separating the TZ30 Tape Drive from the Mounting
Bracket ......................................... 3–21
3.5.2 Setting the SCSI ID on the Replacement TZ30 Tape
Drive ........................................... 3–22
3.6 Removing a TZK10/TZK11 Tape Drive . . . . . . . . . . . . . . . . . . . . . 3–23
3.6.1 Separating the TZK10/TZK11 Tape Drive from the Mounting
Bracket ......................................... 3–25
3.6.2 Setting the SCSI ID of the Replacement TZK10/TZK11 Tape
Drive ........................................... 3–26
3.7 Removing a TLZ06/TLZ07 Tape Drive . . . . . . . . . . . . . . . . . . . . . 3–28
3.7.1 Separating the TLZ06/TLZ07 Tape Drive from the Mounting
Bracket ......................................... 3–30
3.7.2 Setting the SCSI ID and Option Switches of the Replacement
TLZ06/TLZ07 Tape Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–31
3.8 Removing an RF31T/RF35/RF36 Disk Drive . . . . . . . . . . . . . . . . 3–32
3.8.1 Separating the RF-series Drive from the Mounting
Bracket ......................................... 3–33
3.8.2 SettingtheDSSIID................................ 3–35
3.9 Removing an RRD42 CD–ROM Drive . . . . . . . . . . . . . . . . . . . . . 3–37
iv

3.9.1 Separating the RRD42 CD–ROM Drive from the Mounting
Bracket ......................................... 3–39
3.9.2 Setting the SCSI ID on the Replacement RRD42 CD–ROM
Drive ........................................... 3–41
3.10 Removing an RRD43 CD–ROM Drive . . . . . . . . . . . . . . . . . . . . . 3–43
3.10.1 Separating the RRD43 CD–ROM Drive from the Mounting
Bracket ......................................... 3–45
3.10.2 Setting the SCSI ID on the Replacement RRD43 CD–ROM
Drive ........................................... 3–47
3.11 Removing the Upper and Lower Drive-Mounting Shelf
Combination......................................... 3–48
3.12 Removing the SCSI Cable from the Enclosure . . . . . . . . . . . . . . . 3–52
3.13 Removing the DSSI Cable from the Enclosure . . . . . . . . . . . . . . . 3–53
3.14 Removing the DSSI Daughter Board . . . . . . . . . . . . . . . . . . . . . . 3–55
3.14.1 ChangingtheDSSIID.............................. 3–58
3.15 Removing the DSW42 Synchronous Communications Option . . . 3–60
3.15.1 Removing the DSW42 Logic Board . . . . . . . . . . . . . . . . . . . . 3–60
3.15.2 Removing the DSW42 Input/Output Cable . . . . . . . . . . . . . . 3–61
3.15.3 Removing the DSW42 Input/Output Module . . . . . . . . . . . . . 3–62
3.16 Removing the DHW42 Asynchronous Communications
Option ............................................. 3–64
3.16.1 Removing the DHW42 Logic Board . . . . . . . . . . . . . . . . . . . . 3–64
3.16.2 Removing the DHW42 Input/Output Cable . . . . . . . . . . . . . . 3–65
3.16.3 Removing the DHW42 Input/Output Module . . . . . . . . . . . . . 3–66
3.17 Removing the CPU Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–68
3.18 Replacing the CPU Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–72
3.19 Removing the Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–73
A Pin Specifications for the Ports on the BA42B System
B Related Documentation
C Recommended Spare Parts List
v

Glossary
Index
Figures
1–1 BA42BEnclosure.................................. 1–2
1–2 Common VAX 4000 BA42B-Based Systems Controls,
Indicators, Ports, and Connectors for all Models . . . . . . . . . . 1–4
1–3 Ports and Connectors Unique to the VAX 4000 Model 100 . . . 1–5
1–4 Ports and Connectors Unique to the VAX 4000 Model
100A/105A ....................................... 1–6
1–5 PowerDistribution................................. 1–10
1–6 SignalDistribution................................. 1–11
1–7 Memory Expansion Connectors on the KA52/KA53 CPU
Module.......................................... 1–13
1–8 Identifying Appropriate Banks of SIMM Connectors . . . . . . . 1–14
1–9 Communications Options in Model 100/100A/105A
Systems ......................................... 1–16
1–10 Mass Storage Device Combinations in the BA42B
Enclosure........................................ 1–18
2–1 BA42BDimensions ................................ 2–2
2–2 System Unit and Accessory Tray Contents . . . . . . . . . . . . . . . 2–6
2–3 Connecting the Console Terminal . . . . . . . . . . . . . . . . . . . . . . 2–9
2–4 Connecting the ThinWire Terminator to the System . . . . . . . 2–11
2–5 Connecting the Standard Ethernet Loopback Connector to
theSystem....................................... 2–12
2–6 Connecting the SCSI Terminator . . . . . . . . . . . . . . . . . . . . . . 2–13
2–7 Connecting the DSSI Terminator . . . . . . . . . . . . . . . . . . . . . . 2–14
2–8 Connecting the Power Cord . . . . . . . . . . . . . . . . . . . . . . . . . . 2–15
2–9 TurningOntheSystem ............................. 2–16
2–10 Connecting the Console Terminal . . . . . . . . . . . . . . . . . . . . . . 2–19
2–11 Connecting the ThinWire Terminator to the System . . . . . . . 2–21
2–12 Connecting the Standard Ethernet Loopback Connector to
the VAX 4000 Models 100A/105A . . . . . . . . . . . . . . . . . . . . . . 2–22
2–13 Connecting the SCSI Terminator . . . . . . . . . . . . . . . . . . . . . . 2–23
2–14 Connecting the DSSI Terminator . . . . . . . . . . . . . . . . . . . . . . 2–24
2–15 Connecting the Power Cord . . . . . . . . . . . . . . . . . . . . . . . . . . 2–25
vi

2–16 TurningOntheSystem ............................. 2–26
3–1 Major FRUs in the BA42B Enclosure . . . . . . . . . . . . . . . . . . . 3–4
3–2 Removing the Enclosure Cover . . . . . . . . . . . . . . . . . . . . . . . 3–5
3–3 Memory Module Connectors on the KA52/53 CPU Module . . 3–7
3–4 Removing a Memory Module . . . . . . . . . . . . . . . . . . . . . . . . . 3–8
3–5 Removing the Upper Drive-Mounting Shelf . . . . . . . . . . . . . . 3–10
3–6 Disconnecting the DSSI Cables from the Drives . . . . . . . . . . 3–11
3–7 Removing the Upper Drive-Mounting Shelf . . . . . . . . . . . . . . 3–12
3–8 Removing the RX26 Diskette Drive Assembly . . . . . . . . . . . . 3–14
3–9 Removing the RX26 FDI/SCSI Board . . . . . . . . . . . . . . . . . . . 3–15
3–10 Separating the Mounting Bracket from the RX26 Diskette
Drive ........................................... 3–16
3–11 Location of the SCSI ID Switches on the RX26 FDI/SCSI
Board........................................... 3–17
3–12 How to Reach the SCSI ID Switches on the RX26 FDI/SCSI
Board........................................... 3–18
3–13 Removing a TZ30 Tape Drive . . . . . . . . . . . . . . . . . . . . . . . . . 3–20
3–14 Separating the Mounting Bracket from the TZ30 Tape
Drive ........................................... 3–21
3–15 TZ30 SCSI ID Switch Locations . . . . . . . . . . . . . . . . . . . . . . . 3–22
3–16 Removing the TZK10/TZK11 Tape Drive . . . . . . . . . . . . . . . . 3–24
3–17 Separating the Mounting Bracket from the TZK10/TZK11
TapeDrive....................................... 3–25
3–18 Locations of the SCSI ID Jumper Wires on the TZK10/TZK11
TapeDrive....................................... 3–27
3–19 Removing the TLZ06/TLZ07 Tape Drive . . . . . . . . . . . . . . . . 3–29
3–20 Separating the Mounting Bracket from the TLZ06/TLZ07
TapeDrive....................................... 3–30
3–21 Locations of the SCSI ID and Option Switches on the
TLZ06/TLZ07 Tape Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–31
3–22 Removing a Sample RF31T/RF35/RF36 Disk Drive Option
................................................ 3–33
3–23 Separating the Mounting Bracket from the RF-Series
Drive ........................................... 3–34
3–24 Sample RF31T/RF35/RF36 Disk Drive Option with Mounting
Brackets......................................... 3–35
3–25 Removing the RRD42 CD–ROM Drive . . . . . . . . . . . . . . . . . . 3–38
3–26 Separating the Mounting Bracket from the RRD42 CD–ROM
Drive ........................................... 3–40
vii

3–27 RRD42 SCSI ID Jumper Wire Locations . . . . . . . . . . . . . . . . 3–42
3–28 Removing the RRD43 CD–ROM Drive . . . . . . . . . . . . . . . . . . 3–44
3–29 Separating the Mounting Bracket from the RRD43 CD–ROM
Drive ........................................... 3–46
3–30 Removing the Upper and Lower Drive-Mounting Shelf
Combination...................................... 3–49
3–31 Disconnecting the SCSI Cable . . . . . . . . . . . . . . . . . . . . . . . . 3–50
3–32 Disconnecting the DSSI Cable . . . . . . . . . . . . . . . . . . . . . . . . 3–51
3–33 Separating the Upper Drive-Mounting Shelf from the Lower
Drive-MountingShelf............................... 3–53
3–34 Removing the DSSI Cable from the Daughter Board . . . . . . . 3–54
3–35 Removing the DSSI Daughter Board . . . . . . . . . . . . . . . . . . . 3–56
3–36 Removing the DSSI Cable and Daughter Board . . . . . . . . . . . 3–57
3–37 DSSI ID Jumper Locations . . . . . . . . . . . . . . . . . . . . . . . . . . 3–59
3–38 Removing the DSW42 Logic Board . . . . . . . . . . . . . . . . . . . . 3–61
3–39 Removing the DSW42 Input/Output Cable . . . . . . . . . . . . . . 3–62
3–40 Removing the DSW42 Input/Output Module . . . . . . . . . . . . . 3–63
3–41 Removing the DHW42 Logic Board . . . . . . . . . . . . . . . . . . . . 3–65
3–42 Removing the DHW42 Input/Output Cable . . . . . . . . . . . . . . 3–66
3–43 Removing the DHW42 Input/Output Module . . . . . . . . . . . . . 3–67
3–44 Disconnecting the Cables from the CPU Module . . . . . . . . . . 3–69
3–45 Removing the CPU Module . . . . . . . . . . . . . . . . . . . . . . . . . . 3–71
3–46 Removing the Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . 3–74
A–1 Pin Specifications for the Ports on the BA42B System . . . . . . A–2
Tables
1–1 Functions of the Controls, Indicators, Ports, and
Connectors....................................... 1–7
1–2 Power Supply dc Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–9
1–3 BA42B Communications Options . . . . . . . . . . . . . . . . . . . . . . 1–15
1–4 DSW42-AA Communications Interface Support . . . . . . . . . . . 1–15
1–5 BA42B Mass Storage Devices. . . . . . . . . . . . . . . . . . . . . . . . . 1–17
2–1 Temperature, Humidity, and Altitude Ranges . . . . . . . . . . . . 2–4
2–2 BA42B Electrical Requirements . . . . . . . . . . . . . . . . . . . . . . . 2–5
2–3 TerminalSettings.................................. 2–8
2–4 TerminalSettings.................................. 2–17
3–1 Major FRUs in the BA42B Enclosure . . . . . . . . . . . . . . . . . . . 3–3
viii

3–2 RF31T/RF35/RF36 DSSI ID Jumper Wire Combinations . . . . 3–36
A–1 Asynchronous Port A and Port B Pin Specifications for the
Eight-Data and 16-Data Line Options . . . . . . . . . . . . . . . . . . A–3
A–2 Asynchronous Port A and Port B Pin Specifications for the
Eight-Modem Control Line Option . . . . . . . . . . . . . . . . . . . . . A–4
A–3 Pin Specifications for Synchronous Port 0 and Port 1 . . . . . . A–6
A–4 Pin Specifications for the External SCSI Connector . . . . . . . . A–9
C–1 Recommended Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . C–1
ix

Preface
This manual provides the information that you will need to maintain the
BA42B Enclosure when used with the VAX 4000 Model 100/100A/105A
systems. It contains information about the enclosure, installation information,
and procedures for servicing field replaceable units (FRUs).
Audience
This manual is for Digital™ Services personnel who provide support and
maintenance for systems that use this enclosure. It is also for customers
who have a self-maintenance agreement with Digital Equipment Corporation.
Users of this manual must have experience in replacing hardware components.
Structure of This Manual
This manual is divided into three chapters, three appendixes, a glossary, and
an index:
• Chapter 1 provides an overview of the system enclosure and describes
the controls, mass storage areas and capacity, signal distribution, power
distribution, input and output connections, and configuration guidelines.
• Chapter 2 provides site preparation information and describes how to
install the systems that use the enclosure.
• Chapter 3 provides instructions on removing and replacing FRUs.
xi

• Appendix A gives the pin specifications for the ports on the back of the
system unit.
• Appendix B gives a list of the related documents.
• Appendix C gives a list of recommended spare parts.
xii

Conventions
The following conventions are used in this manual:
Convention Description
Ctrl/xCtrl/xindicates that you hold down the Ctrl key while you press
another key or mouse button (indicated here by x).
xA lowercase italic xindicates the generic use of a letter. For
example, xxx indicates any combination of three alphabetic
characters.
italic type Italic type emphasizes important information, indicates variables,
and indicates the complete titles of manuals.
nn nnn.nnn nn A space character separates groups of 3 digits in numerals with 5 or
more digits. For example, 10 000 equals ten thousand.
n.nn A period in numerals signals the decimal point indicator. For
example, 1.75 equals one and three-fourths.
Note A note contains information of special importance to the reader.
Caution A caution contains information to prevent damage to the equipment.
xiii

1
Enclosure Description
This chapter describes the BA42B Enclosure. It gives information on the
following:
• Mass storage device areas
• Controls, indicators, ports, and connectors
• Power and signal distribution
• Air circulation
• Configuration guidelines
The BA42B Enclosure houses the system unit of the VAX 4000 Model
100/100A/105A systems. It is a desktop-style enclosure (see Figure 1–1).
Note
The VAX 4000 Models 100A/105A can be distinguished from the
Model 100 by the protruding connector panel (see Section 1.2). The
illustrations in this manual will show different models as examples.
Where the functionality differs, it is called to the reader’s attention and
addressed in the text.
Enclosure Description 1–1

Enclosure Description
Figure 1–1 BA42B Enclosure
RE_EN06213A_91
1.1 Mass Storage Device Areas
The BA42B Enclosure contains 3.5-inch (13.5 cm) and 5.25-inch (20.25cm)
half-height mass storage devices. These mass storage devices are mounted
on two drive-mounting shelves. The upper drive-mounting shelf can contain
one, two, or three DSSI drives. The lower drive-mounting shelf can contain
one or two SCSI devices, that is, CD–ROM drives or removable media devices.
See Section 1.5.3 for information about mass storage device combinations and
orientation.
1–2 Enclosure Description

Enclosure Description
1.2 Controls, Indicators, Ports, and Connectors
1.2 Controls, Indicators, Ports, and Connectors
The power OK indicator (POK) is on the front of the BA42B Enclosure.
Figure 1–2 shows the common ports and connectors in VAX 4000 BA42B-based
systems. Figure 1–3 and Figure 1–4 show differences between the VAX 4000
Model 100, and the VAX 4000 Models 100A and 105A, respectively. Table 1–1
describes the functions of the controls, indicators, ports, and connectors in all
VAX 4000 BA42B-based systems.
Enclosure Description 1–3

Enclosure Description
1.2 Controls, Indicators, Ports, and Connectors
Figure 1–2 Common VAX 4000 BA42B-Based Systems Controls, Indicators,
Ports, and Connectors for all Models
0
A
B
1
0
On/Off Switch
ac Power Socket
Synchronous
Communications
Ports (0,1)
Asynchronous
Communications
Ports (A,B)
MMJ Ports (0,1,3)
Asynchronous Modem
Control Port (2)
Halt Push Button
Break/Enable Switch
Break/Enable LED
LED Display
Standard Ethernet Port
Ethernet Switch
ThinWire Ethernet Port
Power OK Indicator (POK)
MLO-012383
1–4 Enclosure Description

Enclosure Description
1.2 Controls, Indicators, Ports, and Connectors
Figure 1–3 Ports and Connectors Unique to the VAX 4000 Model 100
0
A
B
1
0
SCSI Port DSSI Port MLO-012385
Q-Bus Ports
Enclosure Description 1–5

Enclosure Description
1.2 Controls, Indicators, Ports, and Connectors
Figure 1–4 Ports and Connectors Unique to the VAX 4000 Model 100A/105A
132
MLO-012384
3
12
2
4

DSSI port

Q–bus ports

Optional DSSI ports

SCSI port
1–6 Enclosure Description