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EK-472AB-MG-C01

September 1995

176 pages

Original

4.8MB

Document:	VAX 4000 BA42B Enclosure Maintenance
Order Number:	EK-472AB-MG
Revision:	C01
Pages:	176
Original Filename:

OCR Text

VAX 4000
BA42B Enclosure Maintenance
Order Number: EK–472AB–MG. C01

September 1995

This manual provides reference, installation, and maintenance information
for the BA42B Enclosure used with the VAX 4000 Models 100, 100A, 105A,
and 106A systems.

Digital Equipment Corporation
Maynard, Massachusetts

Revised, September 1995
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, 1995. 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.
S2866

This document was prepared using VAX DOCUMENT Version 2.1.

Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 Enclosure Description
1.1
1.2
1.3
1.4
1.5
1.5.1
1.5.2
1.5.3

Mass Storage Device Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Controls, Indicators, Ports, and Connectors . . . . . . . . . . . . . . . . .
Power and Signal Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Circulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuration Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Memory Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Communications Options . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mass Storage Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–2
1–3
1–10
1–12
1–13
1–13
1–16
1–18

2 Installation Procedures
2.1
Preparing the Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.1
Enclosure Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.2
Additional Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.3
Operating Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.4
Electrostatic Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.5
Heat Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.6
Temperature, Humidity, and Altitude Ranges . . . . . . . . . . . .
2.1.7
Electrical Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2
Unpacking the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3
Installing the BA42B System . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.1
Installing a BA42B-Based VAX 4000 Model 100 . . . . . . . . . .
2.3.1.1
Identifying the Ports and Connectors on the System . . . .
2.3.1.2
Connecting the Console Terminal . . . . . . . . . . . . . . . . . . .
2.3.1.3
Connecting the ThinWire Terminator or Loopback
Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.1.4
Connecting the SCSI Terminator . . . . . . . . . . . . . . . . . . .
2.3.1.5
Connecting the DSSI Terminator . . . . . . . . . . . . . . . . . . .
2.3.1.6
Connecting the System Unit Power Cord . . . . . . . . . . . . .

2–1
2–1
2–2
2–3
2–3
2–3
2–4
2–4
2–5
2–7
2–7
2–7
2–7
2–10
2–13
2–14
2–15

iii

2.3.1.7
2.3.2
2.3.2.1
2.3.2.2
2.3.2.3
2.3.2.4
2.3.2.5
2.3.2.6
2.3.2.7

Turning On the System . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing a BA42B-Based VAX 4000 Model
100A/105A/106A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identifying the Ports and Connectors on the System . . . .
Connecting the Console Terminal . . . . . . . . . . . . . . . . . . .
Connecting the ThinWire Terminator or Loopback
Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting the SCSI Terminator . . . . . . . . . . . . . . . . . . .
Connecting the DSSI Terminator . . . . . . . . . . . . . . . . . . .
Connecting the System Unit Power Cord . . . . . . . . . . . . .
Turning On the System . . . . . . . . . . . . . . . . . . . . . . . . . .

2–16
2–17
2–17
2–17
2–20
2–23
2–24
2–26
2–27

3 Removing and Replacing Field Replaceable Units
3.1
3.2
3.3
3.4
3.4.1
3.4.2
3.4.3
3.5
3.5.1
3.5.2
3.6
3.6.1
3.6.2
3.7
3.7.1
3.7.2
3.8
3.8.1
3.8.2

Removing the Enclosure Cover . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing an MS44 or MS44L Memory Module . . . . . . . . . . . . . .
Removing the Upper Drive-Mounting Shelf . . . . . . . . . . . . . . . . .
Removing the RX26/RX23 Diskette Drive Assembly . . . . . . . . . .
Removing the RX26/RX23 FDI/SCSI Board . . . . . . . . . . . . . .
Separating the RX26/RX23 Diskette Drive from the
Mounting Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the SCSI ID on the Replacement RX26/RX23
FDI/SCSI Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing a TZ30 Tape Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Separating the TZ30 Tape Drive from the Mounting
Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the SCSI ID on the Replacement TZ30 Tape
Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing a TZK10/TZK11 Tape Drive . . . . . . . . . . . . . . . . . . . . .
Separating the TZK10/TZK11 Tape Drive from the Mounting
Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the SCSI ID of the Replacement TZK10/TZK11 Tape
Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing a TLZ06/TLZ07 Tape Drive . . . . . . . . . . . . . . . . . . . . .
Separating the TLZ06/TLZ07 Tape Drive from the Mounting
Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the SCSI ID and Option Switches of the Replacement
TLZ06/TLZ07 Tape Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing an RZ-Series Disk Drive . . . . . . . . . . . . . . . . . . . . . . .
Removing an RZ-Series Disk Drive from the Upper
Drive-Mounting Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing an RZ-Series Disk Drive from the Lower
Drive-Mounting Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–5
3–6
3–9
3–13
3–14
3–15
3–16
3–19
3–21
3–22
3–23
3–25
3–26
3–28
3–30
3–31
3–32
3–32
3–34

3.8.3
3.8.4
3.8.5
3.9
3.9.1
3.9.2
3.10
3.10.1
3.10.2
3.11
3.11.1
3.11.2
3.12
3.13
3.14
3.15
3.15.1
3.16
3.16.1
3.16.2
3.16.3
3.17
3.17.1
3.17.2
3.17.3
3.18
3.19
3.20

Separating the Support Plate from an RZ23L or RZ24 Disk
Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Separating the Mounting Bracket from an RZ24L, RZ25,
RZ25L, RZ26, RZ26L, or RZ28 Disk Drive . . . . . . . . . . . . . . .
Setting the SCSI ID on the Replacement Disk Drive . . . . . . .
Removing an RF31T/RF35/RF36 Disk Drive . . . . . . . . . . . . . . . .
Separating the RF-series Drive from the Mounting
Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the DSSI ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing an RRD42 CDROM Drive . . . . . . . . . . . . . . . . . . . . . .
Separating the RRD42 CDROM Drive from the Mounting
Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the SCSI ID on the Replacement RRD42 CDROM
Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing an RRD43 CDROM Drive . . . . . . . . . . . . . . . . . . . . . .
Separating the RRD43 CDROM Drive from the Mounting
Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the SCSI ID on the Replacement RRD43 CDROM
Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Upper and Lower Drive-Mounting Shelf
Combination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the SCSI Cable from the Enclosure . . . . . . . . . . . . . . .
Removing the DSSI Cable from the Enclosure . . . . . . . . . . . . . . .
Removing the DSSI Daughter Board . . . . . . . . . . . . . . . . . . . . . .
Changing the DSSI ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the DSW42 Synchronous Communications Option . . .
Removing the DSW42 Logic Board . . . . . . . . . . . . . . . . . . . .
Removing the DSW42 Input/Output Cable . . . . . . . . . . . . . .
Removing the DSW42 Input/Output Module . . . . . . . . . . . . .
Removing the DHW42 Asynchronous Communications
Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the DHW42 Logic Board . . . . . . . . . . . . . . . . . . . .
Removing the DHW42 Input/Output Cable . . . . . . . . . . . . . .
Removing the DHW42 Input/Output Module . . . . . . . . . . . . .
Removing the CPU Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the CPU Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–36
3–38
3–40
3–47
3–48
3–50
3–52
3–54
3–56
3–58
3–60
3–62
3–63
3–67
3–68
3–70
3–73
3–75
3–75
3–76
3–77
3–79
3–79
3–80
3–81
3–83
3–87
3–88

A Pin Specifications for the Ports on the BA42B System
B Related Documentation
C Recommended Spare Parts List
Glossary
Index
Figures
1–1
1–2
1–3
1–4
1–5
1–6
1–7
1–8
1–9
1–10
1–11
2–1
2–2
2–3
2–4
2–5
2–6
2–7

BA42B Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Common VAX 4000 BA42B-Based Systems Controls,
Indicators, Ports, and Connectors for all Models . . . . . . . . . .
Ports and Connectors Unique to the VAX 4000 Model 100 . . .
Ports and Connectors Unique to the VAX 4000 Model
100A/105A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ports and Connectors Unique to the VAX 4000 Model
106A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Signal Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Memory Expansion Connectors on the KA52/KA53/KA54
CPU Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identifying Appropriate Banks of SIMM Connectors . . . . . . .
Communications Options in Model 100/100A/105A/106A
Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mass Storage Device Combinations in the BA42B
Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BA42B Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Unit and Accessory Tray Contents . . . . . . . . . . . . . . .
Connecting the Console Terminal . . . . . . . . . . . . . . . . . . . . . .
Connecting the ThinWire Terminator to the System . . . . . . .
Connecting the Standard Ethernet Loopback Connector to
the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting the SCSI Terminator . . . . . . . . . . . . . . . . . . . . . .
Connecting the DSSI Terminator . . . . . . . . . . . . . . . . . . . . . .

1–2
1–4
1–5
1–6
1–7
1–11
1–12
1–14
1–15
1–17
1–19
2–2
2–6
2–9
2–11
2–12
2–13
2–14

2–8
2–9
2–10
2–11
2–12
2–13
2–14
2–15
2–16
2–17
3–1
3–2
3–3
3–4
3–5
3–6
3–7
3–8
3–9
3–10
3–11
3–12
3–13
3–14
3–15
3–16
3–17
3–18
3–19

Connecting the Power Cord . . . . . . . . . . . . . . . . . . . . . . . . . .
Turning On the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting the Console Terminal . . . . . . . . . . . . . . . . . . . . . .
Connecting the ThinWire Terminator to the System . . . . . . .
Connecting the Standard Ethernet Loopback Connector to
the VAX 4000 Models 100A/105A/106A . . . . . . . . . . . . . . . . .
Connecting the SCSI Terminator . . . . . . . . . . . . . . . . . . . . . .
Connecting the DSSI Terminator - Models 100A/105A . . . . . .
Connecting the DSSI Terminator - Model 106A . . . . . . . . . . .
Connecting the Power Cord . . . . . . . . . . . . . . . . . . . . . . . . . .
Turning On the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Major FRUs in the BA42B Enclosure . . . . . . . . . . . . . . . . . . .
Removing the Enclosure Cover . . . . . . . . . . . . . . . . . . . . . . .
Memory Module Connectors on the KA52/53/54 CPU
Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing a Memory Module . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Upper Drive-Mounting Shelf . . . . . . . . . . . . . .
Disconnecting the DSSI Cables from the Drives . . . . . . . . . .
Removing the Upper Drive-Mounting Shelf . . . . . . . . . . . . . .
Removing the RX26/RX23 Diskette Drive Assembly . . . . . . .
Removing the RX26/RX23 FDI/SCSI Board . . . . . . . . . . . . . .
Separating the Mounting Bracket from the RX26/RX23
Diskette Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Location of the SCSI ID Switches on the RX26/RX23
FDI/SCSI Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Reach the SCSI ID Switches on the RX26/RX23
FDI/SCSI Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing a TZ30 Tape Drive . . . . . . . . . . . . . . . . . . . . . . . . .
Separating the Mounting Bracket from the TZ30 Tape
Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TZ30 SCSI ID Switch Locations . . . . . . . . . . . . . . . . . . . . . . .
Removing the TZK10/TZK11 Tape Drive . . . . . . . . . . . . . . . .
Separating the Mounting Bracket from the TZK10/TZK11
Tape Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Locations of the SCSI ID Jumper Wires on the TZK10/TZK11
Tape Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the TLZ06/TLZ07 Tape Drive . . . . . . . . . . . . . . . .

2–15
2–16
2–19
2–21
2–22
2–23
2–24
2–25
2–26
2–27
3–4
3–5
3–7
3–8
3–10
3–11
3–12
3–14
3–15
3–16
3–17
3–18
3–20
3–21
3–22
3–24
3–25
3–27
3–29

vii

3–20
3–21
3–22
3–23
3–24
3–25
3–26
3–27
3–28
3–29
3–30
3–31
3–32
3–33
3–34
3–35
3–36
3–37
3–38
3–39
3–40
3–41
3–42
3–43
3–44
3–45
viii

Separating the Mounting Bracket from the TLZ06/TLZ07
Tape Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Locations of the SCSI ID and Option Switches on the
TLZ06/TLZ07 Tape Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing RZ-Series Disk Drives from the Upper
Drive-Mounting Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing an RZ-Series Disk Drive from the Lower
Drive-Mounting Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Separating the Support Plate from the Disk Drive . . . . . . . .
Separating the Mounting Bracket from the RZ26 Disk
Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RZ23L Disk Drive SCSI ID Jumper Wire Locations . . . . . . . .
RZ24 Disk Drive SCSI ID Jumper Wire Locations . . . . . . . . .
RZ24L Disk Drive SCSI ID Jumper Wire Locations . . . . . . . .
RZ25 Disk Drive SCSI ID Jumper Wire Locations . . . . . . . . .
RZ25L Disk Drive SCSI ID Jumper Wire Locations . . . . . . . .
RZ25M Disk Drive SCSI ID Jumper Wire Locations . . . . . . .
RZ26/RZ26L/RZ28 Disk Drive SCSI ID Jumper Wire
Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing a Sample RF31T/RF35/RF36 Disk Drive Option
................................................
Separating the Mounting Bracket from the RF-Series
Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sample RF31T/RF35/RF36 Disk Drive Option with Mounting
Brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the RRD42 CDROM Drive . . . . . . . . . . . . . . . . . . .
Separating the Mounting Bracket from the RRD42 CDROM
Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RRD42 SCSI ID Jumper Wire Locations . . . . . . . . . . . . . . . .
Removing the RRD43 CDROM Drive . . . . . . . . . . . . . . . . . . .
Separating the Mounting Bracket from the RRD43 CDROM
Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Upper and Lower Drive-Mounting Shelf
Combination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disconnecting the SCSI Cable . . . . . . . . . . . . . . . . . . . . . . . .
Disconnecting the DSSI Cable . . . . . . . . . . . . . . . . . . . . . . . .
Separating the Upper Drive-Mounting Shelf from the Lower
Drive-Mounting Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the DSSI Cable from the Daughter Board . . . . . . .

3–30
3–31
3–33
3–35
3–37
3–39
3–41
3–41
3–42
3–43
3–44
3–45
3–46
3–48
3–49
3–50
3–53
3–55
3–57
3–59
3–61
3–64
3–65
3–66
3–68
3–69

3–46
3–47
3–48
3–49
3–50
3–51
3–52
3–53
3–54
3–55
3–56
3–57
A–1

Removing the DSSI Daughter Board . . . . . . . . . . . . . . . . . . .
Removing the DSSI Cable and Daughter Board . . . . . . . . . . .
DSSI ID Jumper Locations . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the DSW42 Logic Board . . . . . . . . . . . . . . . . . . . .
Removing the DSW42 Input/Output Cable . . . . . . . . . . . . . .
Removing the DSW42 Input/Output Module . . . . . . . . . . . . .
Removing the DHW42 Logic Board . . . . . . . . . . . . . . . . . . . .
Removing the DHW42 Input/Output Cable . . . . . . . . . . . . . .
Removing the DHW42 Input/Output Module . . . . . . . . . . . . .
Disconnecting the Cables from the CPU Module . . . . . . . . . .
Removing the CPU Module . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Power Supply . . . . . . . . . . . . . . . . . . . . . . . . .
Pin Specifications for the Ports on the BA42B System . . . . . .

3–71
3–72
3–74
3–76
3–77
3–78
3–80
3–81
3–82
3–84
3–86
3–89
A–2

Tables
1–1
1–2
1–3
1–4
1–5
2–1
2–2
2–3
2–4
3–1
3–2
A–1
A–2
A–3
A–4
C–1

Functions of the Controls, Indicators, Ports, and
Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Supply dc Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BA42B Communications Options . . . . . . . . . . . . . . . . . . . . . .
DSW42-AA Communications Interface Support . . . . . . . . . . .
BA42B Mass Storage Devices . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature, Humidity, and Altitude Ranges . . . . . . . . . . . .
BA42B Electrical Requirements . . . . . . . . . . . . . . . . . . . . . . .
Terminal Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Terminal Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Major FRUs in the BA42B Enclosure . . . . . . . . . . . . . . . . . . .
RF31T/RF35/RF36 DSSI ID Jumper Wire Combinations . . . .
Asynchronous Port A and Port B Pin Specifications for the
Eight-Data and 16-Data Line Options . . . . . . . . . . . . . . . . . .
Asynchronous Port A and Port B Pin Specifications for the
Eight-Modem Control Line Option . . . . . . . . . . . . . . . . . . . . .
Pin Specifications for Synchronous Port 0 and Port 1 . . . . . .
Pin Specifications for the External SCSI Connector . . . . . . . .
Recommended Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–8
1–10
1–16
1–16
1–18
2–4
2–5
2–8
2–17
3–3
3–51
A–3
A–4
A–6
A–9
C–1

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/106A
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.

xii

•

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.

Conventions
The following conventions are used in this manual:
Convention

Description

Ctrl/x

Ctrl/x indicates that you hold down the Ctrl key while you press
another key or mouse button (indicated here by x).

A lowercase italic x indicates 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/106A systems. It is a desktop-style enclosure (see Figure 1–1).
Note
The VAX 4000 Models 100A/105A/106A 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. 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. Figure 1–5
shows the VAX 4000 Model 106A. 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
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
Q-Bus Ports

SCSI Port

DSSI Port
MLO-012385

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

3
2

! DSSI port
" Q–bus ports
# Optional DSSI ports
$ SCSI port

1–6 Enclosure Description

MLO-012384

Enclosure Description
1.2 Controls, Indicators, Ports, and Connectors
Figure 1–5 Ports and Connectors Unique to the VAX 4000 Model 106A

3
2

! DSSI port
" Q–bus ports
# Optional DSSI ports
$ SCSI port

MLO-013171

Enclosure Description 1–7

Enclosure Description
1.2 Controls, Indicators, Ports, and Connectors
Table 1–1 Functions of the Controls, Indicators, Ports, and Connectors
Component

Description

On/Off switch

Applies and stops the power to the system unit as follows:

System ac power socket
1

•

On ( | )—Applies the ac power to the system unit

•

Off (O)—Stops the ac power to the system unit

A socket for the ac power input.

SCSI port

A port that allows you to connect external SCSI devices.

Synchronous communications ports (0,1)2

Two ports that allow you to connect devices that have
synchronous communications support.

Asynchronous communications ports (A,B)2

One or two ports that provide one of the following
asynchronous communications expansion options:
•

Eight DEC423 compatible asynchronous ports

•

Sixteen DEC423 compatible asynchronous ports

•

Eight EIA-232 compatible modem ports

MMJ3 port 0

DEC423 compatible asynchronous port.

MMJ port 1

DEC423 compatible asynchronous port.

MMJ port 3

DEC423 compatible asynchronous port. This is the console
port.

Asynchronous modem
control port (2)

EIA-232 compatible asynchronous port with modem control.

DSSI Connector4

Ports for the management of integrated storage products.

Q–bus Connectors

Q–bus expansion port which connects the expansion
enclosure.

Halt push button

A momentary-contact push button that puts the system in
console mode.

1 Small computer system interface (SCSI).
2 Optional ports that depend on the system configuration.
3 Modified modular jack (MMJ).
4 Digital Storage Systems Interconnect (DSSI); up to three in some optional configurations.

(continued on next page)

1–8 Enclosure Description

Enclosure Description
1.2 Controls, Indicators, Ports, and Connectors
Table 1–1 (Cont.) Functions of the Controls, Indicators, Ports, and Connectors
Component
Break/enable switch

Description
5

Break/enable LED6

A two-position switch that determines the function of the
Break key.
•

Up position—(Break enabled) In this state, you can
press the Break key on the keyboard to put the system
in console mode.

•

Down position—(Break disabled) Depressing the break
key has no effect on system oprartion.

A LED indicator shows the function of MMJ port 3 as
follows:
•

On—Break Enabled

•

Off—Break disabled.

LED display

A set of eight LEDs that provide power-up and selftest diagnostic code information. This is useful for fault
diagnosis when the console terminal is not functioning.

Standard Ethernet port

A port that allows you to connect the system to a standard
Ethernet network.

Ethernet switch

A two-position switch that determines the type of Ethernet
that the system uses as follows:

ThinWire Ethernet port

•

Left position—selects the standard Ethernet type

•

Right position—selects the ThinWire™ Ethernet type

A port that allows you to connect the system to a ThinWire
Ethernet network.

5 The system recognizes the position of this switch only when you turn on the power.
6 Light emitting diode (LED).

Enclosure Description 1–9

Enclosure Description
1.3 Power and Signal Distribution

1.3 Power and Signal Distribution
The power supply (30-35042-01) provides power to all the units in the
enclosure. It accepts alternating current (ac) input voltage in the ranges 110 V
ac to 120 V ac (88 V rms1 to 132 V rms) and 220 V ac to 240 V ac (176 V rms
to 264 V rms).
The regulators in the power supply maintain the correct direct current (dc)
output voltages, which are independent of the fluctuations in the ac input
power. The power supply can provide a continuous power output of 166
watts (W). The power supply has two internal fans that cool the unit while it
operates. Table 1–2 gives the current specifications of the dc circuits.
Table 1–2 Power Supply dc Outputs
Voltage (dc)

Output Current Range in Amperes (dc)
Minimum

Maximum

+5.1

3.8

15.0

+12.1

0.18

7.1

-12.0

0.3

1.0

-9.0

0.0

0.2

+3.3

0.0

3.5

The power supply (30-35042-01) has the following output connectors:
•

A flying lead connector that provides the dc power to the central processing
unit (CPU) module

•

One connector on the side of the power supply that provides the dc power
to the devices on the upper drive-mounting shelf

•

One connector on the side of the power supply that provides the dc power
to the devices on the lower drive-mounting shelf

Figure 1–6 shows the distribution of power in the BA42B Enclosure.

Root mean square.

1–10 Enclosure Description

Enclosure Description
1.3 Power and Signal Distribution
Figure 1–6 Power Distribution
CPU Module

Lower Shelf
dc Harness
Cable
(17-03018-01)

Power
Supply

TZ30 Only
TZK10/11
or
TZ30
or
RX26
or
RRD42/43

TZK10/11
or
RRD42/42
or
RX26
or
TZ30

Additional
Connector
for RX26
Lower Drive
Mounting Shelf
Upper Shelf
dc Harness
Cable
(17-03615-01)
Not Used

RF*
RF*

RF*
Upper Drive
Mounting Shelf

Note: RF* denotes RF31T/RF35/RF36 Disk Drives
MLO-012379

Appendix A provides information on the pin specifications for the connectors.
The CPU module is the main source for signal distribution in a BA42B
Enclosure system. The SCSI and DSSI cables are connected to the CPU
module. Each of the other connectors on the cables has a pull-tab. Use the
pull-tab to disconnect the cable from a device. Each pull-tab has a number that
identifies the drive to which the SCSI or DSSI cable connector is connected
(see Figure 1–7).

Enclosure Description 1–11

Enclosure Description
1.3 Power and Signal Distribution
Figure 1–7 Signal Distribution

CPU Module

External
SCSI
(17-02944-01)

Internal SCSI

External
Q-bus
(17-03545-01)

Synchronous
Input/Output
(17-02942-01)

Asynchronous
Input/Output
(17-09242-01)
SCSI Cable
(17-03587-01)

Power
Supply

Internal DSSI

DSSI Cable
(17-03544-01)

Lower Drive
Mounting Shelf

Upper Drive
Mounting Shelf

MLO-012380

1.4 Air Circulation
The power supply (30-35042-01) contains two fans. These fans provide the air
circulation for the enclosure. The air intake is on the right side of the BA42B
Enclosure (when viewed from the front), and the air exhaust is on the left side.
A typical value of airflow is 0.0104 cubic meters per second (m³/sec) (22 cubic
feet per minute [ft³/min]).

1–12 Enclosure Description

Enclosure Description
1.5 Configuration Guidelines

1.5 Configuration Guidelines
The combination of memory, communications options, and internal mass
storage devices determines the configuration of a system. Refer to the VAX
4000 Model 100, 100A, 105A, 106A KA52/53/54 CPU System Maintenance
manual for a list of the external mass storage devices that VAX 4000 Models
100/100A/105A/106A systems support.

1.5.1 Memory Configurations
In the VAX 4000 100/100A/105A/106A, the basic system memory is 16-MB
or 64-MB. This memory is contained on two sets of MS44L-BC or MS44-DC
modules installed on the KA52/KA53/KA54 CPU module. You can expand
the system memory in 16-MB or 32-MB increments by adding MS44L-BC or
MS44-DC memory options. An MS44L-BC memory option consists of four
MS44L-AA (4-MB) memory modules. An MS44-DC memory option consists of
four MS44-CA (16-MB) memory modules. Figure 1–8 shows the locations of the
memory expansion connectors on the VAX 4000 Models 100/100A/105A/106A
KA52/53/54 CPU module.

Enclosure Description 1–13

Enclosure Description
1.5 Configuration Guidelines
Figure 1–8 Memory Expansion Connectors on the KA52/KA53/KA54 CPU
Module
1G
0C
1E
0A

1H
0D
1F
0B
MLO-009828

Note
Both MS44–DC (four MS44–CA SIMMs) and MS44L–BC (four MS44L–
AA SIMMs) must be installed entirely in either the ‘‘1’’ bank or the ‘‘0’’
bank of connectors; do not mix them in banks.

Figure 1–9 shows the banks of slots as they are viewed from the front of the
system. The ‘‘1’’ set of banks is shaded for identification.

1–14 Enclosure Description

Enclosure Description
1.5 Configuration Guidelines
Figure 1–9 Identifying Appropriate Banks of SIMM Connectors

1
1H

5
0C

3
1E

7
0B

! Bank 1G
" Bank 1H
# Bank 1E
$ Bank 1F

% Bank 0C
& Bank 0D
' Bank 0A
( Bank 0B

MLO-012342

Enclosure Description 1–15

Enclosure Description
1.5 Configuration Guidelines

1.5.2 Communications Options
Table 1–3 lists the communications options that a BA42B Enclosure can
contain.
Table 1–3 BA42B Communications Options
Option Name

Description

Asynchronous Options
DHW42-AA

Provides 8 DEC423 asynchronous lines

DHW42-BA

Provides 16 DEC423 asynchronous lines

DHW42-CA

Provides 8 EIA-232 asynchronous modem lines

DHW42-UP

8 to 16 DEC423 asynchronous line upgrade

Synchronous Options
DSW42-AA1

Provides two EIA-232/V.24 synchronous lines

1 This option is supplied with two external cables that support the EIA-232/V.24 interface.

The DSW42-AA option also supports the communications interfaces listed in
Table 1–4, but you must order the external cable separately.
Table 1–4 DSW42-AA Communications Interface Support
Communications Interface

External Cable

EIA-423/V.10

BC19E-02

EIA-422/V.11

BC19B-02

Each communications option contains three field replaceable units (FRUs) that
are installed in the enclosure as follows:
•

A logic board
The logic board connects directly to the CPU module.

•

An input/output cable
The input/output cable connects the CPU module to the input/output
module.

•

An input/output module

1–16 Enclosure Description

Enclosure Description
1.5 Configuration Guidelines
The input/output module is a snap-fit assembly that is attached to the
inside of the back panel of the BA42B Enclosure.
The communications options logic boards have different locations in the BA42B
Enclosure, depending on the model number of the system. The DHW42 logic
board is located to the left of the CPU module, with the DSW42 logic board
located to its right (see Figure 1–10; Model 100 is shown as an example).
Figure 1–10 Communications Options in Model 100/100A/105A/106A
Systems
DSW42 Input/Output Module
DSW42 Input/Output Cable
DSW42 Logic Board

DHW42 Logic Board
DHW42 Input/Output Module
DHW42 Input/Output Cable
MLO-009870

Enclosure Description 1–17

Enclosure Description
1.5 Configuration Guidelines

1.5.3 Mass Storage Devices
Table 1–5 lists the mass storage devices that the BA42B Enclosure can
contain.
Table 1–5 BA42B Mass Storage Devices
Option Name

Description

Size1

Capacity

(in)
RF31T/RF35
/RF36

Disk drive

3.5

381-MB/852-MB
/1.6-GB

TZ302

Tape drive

5.25

95-MB cartridge

TZK10/TZK112

Tape drive

5.25

Range of cartridges3

TLZ06/TLZ072

Tape drive

5.25

Range of cassettes4

RX26/RX232

Diskette drive

3.5

Range of diskettes5

RRD422

CDROM5 drive

5.25

600-MB CDROM

CDROM5 drive

5.25

600-MB CDROM

RRD43

1 Size of half-height device.
2 Removable media device.
3 Supports 320-MB and 525-MB cartridges.
4 Supports 60 M and 90 m cassettes.
5 Supports 1.4-MB and 2.8-MB diskettes.

The BA42B Enclosure has two drive-mounting shelves for mass storage devices
as follows:
•

Upper drive-mounting shelf
The upper drive-mounting shelf can contain one, two, or three DSSI disk
drives.

•

Lower drive-mounting shelf
The lower drive-mounting shelf can contain one or two SCSI devices. These
devices are either CDROM drives or removable media devices.

Figure 1–11 shows the combinations of mass storage devices in a BA42B
Enclosure.

1–18 Enclosure Description

Enclosure Description
1.5 Configuration Guidelines
Figure 1–11 Mass Storage Device Combinations in the BA42B Enclosure
Upper Drive-mounting Shelf

RF*

Lower Drive-mounting Shelf

TLZ06
TZ30
TZK10/11
RRD42/43
RX26
RZ Series

Left-hand Compartment

Right-hand Compartment

Note: RF* denotes RF31T/RF35/RF36 disk drives.
MLO-009829b

Enclosure Description 1–19

2
Installation Procedures
100A/105A
This chapter describes how to install a BA42B system. It gives information on
the following:
•

Preparing the site

•

Unpacking the system

•

Installing a BA42B system

Since the back of the enclosure differs from model to model, the portion of
this chapter devoted to the actual installation of the system is divided into
two sections; the first covers the VAX 4000 Model 100, and the second section
covers the VAX 4000 Models 100A/105A/106A.

2.1 Preparing the Site
Before you unpack the BA42B system, verify the physical, environmental, and
electrical requirements described in this section.

2.1.1 Enclosure Dimensions
Figure 2–1 shows the dimensions of the BA42B Enclosure.
Caution
The container and enclosure together typically weigh 20.50 kilograms
(kg) (45 pounds [lb]). Two people are required to handle the container.

Installation Procedures 2–1

Installation Procedures
2.1 Preparing the Site
Figure 2–1 BA42B Dimensions

14.99 cm
(5.90 in)

40.00 cm
(15.75 in)
46.83 cm
(18.26 in)

RE_EN06221A_91

The dimensions of the container are as follows:
•

Height = 35.3 cm (14.0 inches)

•

Width = 61.1 cm (24.0 inches)

•

Depth = 51.0 cm (20.0 inches)

2.1.2 Additional Equipment
When you are installing additional equipment, follow these guidelines:
•

Make sure that there is sufficient space for the terminals and other
peripheral equipment.

•

Make sure that you keep the mass storage devices in an area that has the
same temperature and humidity as the computer area (see Table 2–1).

•

When you plan the cable routing for multiple-terminal systems, consider
factors such as safety, convenience, future expansion, and cost. Label and
install the cables before you install the system.

2–2 Installation Procedures

Installation Procedures
2.1 Preparing the Site

2.1.3 Operating Environment
Computer systems in office areas are subject to electrostatic discharge (ESD),
temperature changes, and humidity. To install the system in the correct
environment, follow these guidelines:
•

Install the system in a well-ventilated area where the temperature and
humidity ranges listed in Table 2–1 are maintained during the year.

•

Do not place a system near heating or cooling devices, large windows, or
doors that open to the outside. Rapid changes of temperature can affect
the performance of the system.

•

Place the system in an area where the air contains a minimum of dust and
other abrasive contaminants.

2.1.4 Electrostatic Discharge
ESD can cause system failures and loss of data. To minimize the buildup of
static electricity, follow these guidelines:
•

Maintain a relative humidity level of at least 40%.

•

Place the system away from busy corridors.

•

Carpet in the computer area is not recommended. However, if you want to
use carpet, antistatic carpet is recommended. When carpet is already in
use, put an antistatic mat under the system.

2.1.5 Heat Dissipation
The heat dissipated by a BA42B Enclosure system depends on the model
number of the system, but is typically 410 British thermal units/hour (Btu/h).

Installation Procedures 2–3

Installation Procedures
2.1 Preparing the Site

2.1.6 Temperature, Humidity, and Altitude Ranges
Table 2–1 gives the operating, nonoperating, and storage ranges for the
temperature, humidity, and altitude for BA42B Enclosure systems.
Table 2–1 Temperature, Humidity, and Altitude Ranges
Parameter

Operating Range1

Nonoperating Range

Storage Range

Temperature

10°C to 40°C

–40°C to 66°C

5°C to 50°C

(50°F to 104°F)

(–40°F to 151°F)

(41°F to 122°F)

Relative
humidity2

10% to 90%

10% to 95%2

10% to 95%

Altitude

2400 m maximum

4900 m maximum

(8000 ft maximum)

(16 000 ft maximum)

Rate of change
of temperature

11°C per hour
maximum
(20°F per hour
maximum)

1 For operation above sea level, decrease the operating temperature by 1.8°C per 1000 m (or 1°F

per 1000 ft).
2 At a temperature of 66°C.

2.1.7 Electrical Requirements
The power source to which the system connects must be capable of providing
power to the system unit and any other additional equipment, such as local
terminals and expansion boxes. Digital™ recommends that each system
operates in a dedicated power circuit. Additional power equipment may
be required to avoid power interruptions. Table 2–2 lists the electrical
requirements of systems in BA42B Enclosures. The power supply in the
system is autosensing. You do not have to select the input voltage.

2–4 Installation Procedures

Installation Procedures
2.1 Preparing the Site
Table 2–2 BA42B Electrical Requirements
Parameter

Values

Nominal voltages

110 V ac or 220 V ac

Voltage ranges

100 V ac to 120 V ac (88 V rms1 to 132 V rms) and
220 V ac to 240 V ac (176 V rms to 264 V rms)

Power source phase

Single

Nominal frequencies

50 Hz2 or 60 Hz

Frequency range

47 Hz to 63 Hz

Maximum running current

1.2 A for 110 V ac systems and 0.6 A for 220 V ac
systems

Steady state current

1.0 A for 110 V ac systems and 0.5 A for 220 V ac
systems

Maximum inrush current

32 A

Maximum power consumption

120 W

1 Root mean square (rms).
2 Hertz (Hz).

2.2 Unpacking the System
Open the container. Remove the box and the accessory tray. The box contains
the system unit. The accessory tray contains the following:
•

Customer Hardware Information Kit

•

OpenVMS Factory Installed Software User Guide

•

Software licenses

•

Power cord

•

Other accessories

Expansion boxes, if ordered, are supplied in separate containers.
Depending on the system configuration, the contents of the container may
differ from the items shown in Figure 2–2. When unpacking the system, do the
following:
1. Check the contents of the container against the packing slip.
2. Store the unused parts for future use. Depending on how you set up the
system, you may not use all the components supplied with the system.

Installation Procedures 2–5

Installation Procedures
2.2 Unpacking the System
Always repack the system unit in its original packing material when moving or
relocating the system. This precaution protects the system from damage.
Note
Figure 2–2 shows the contents of a VAX 4000 Model 100 kit as an
example. The VAX 4000 100A/105A/106A kits have no Ethernet
Loopback connector, and may contain up to three DSSI terminators,
depending on options ordered.

Figure 2–2 System Unit and Accessory Tray Contents

System Unit

SCSI Terminator
H8574-A (PN 12-30552-01)

........ .
One ThinWire T-Connector
(H8223)
and Two Terminators
(H8225)

DSSI Terminator
(12-29258-01)

Standard Ethernet
Loopback Connector
(12-22196-01)

Power Cord

DEC423
Terminal Cable
(BC16E-25)

Documentation and
Software Licenses
MLO-009837

2–6 Installation Procedures

Installation Procedures
2.3 Installing the BA42B System

2.3 Installing the BA42B System
After you unpack the system, move the BA42B Enclosure to the location from
which it will operate. Place the enclosure so that it satisfies the following
space requirements:
•

Allow 5 cm (approximately 2 inches) of clearance on each side of the
enclosure for ventilation.

•

Allow 10 cm (approximately 4 inches) of clearance in the back of the
enclosure for the connection of cables.

•

Allow 20 cm (approximately 8 inches) of clearance in the front of the
enclosure so that you can reach the removable media devices, depending on
the system configuration.
Note
Section 2.3.1 covers the installation of a VAX 4000 Model 100. See
Section 2.3.2 to install either a VAX 4000 Model 100A or Model 105A
/106A.

2.3.1 Installing a BA42B-Based VAX 4000 Model 100
To install a VAX 4000 Model 100:
2.3.1.1 Identifying the Ports and Connectors on the System
Figure 1–2 and Figure 1–3 show the ports and connectors on a VAX 4000 Model
100. Section 1.2 describes the functions of the controls, indicators, ports, and
connectors in all BA42B-based systems.
2.3.1.2 Connecting the Console Terminal
To connect a console terminal to a BA42B-based VAX 4000 Model 100 system,
follow these steps:
1. Make sure that the on/off switch on the terminal is in the off position.
2. Set the communication parameters of the terminal (see Table 2–3).

Installation Procedures 2–7

Installation Procedures
2.3 Installing the BA42B System
Table 2–3 Terminal Settings
Feature

Setting

Terminal mode

VTnnn-7bit

Transmit speed

9600 baud

Receive speed

receive = transmit

Character format

8 bits, no parity

Stop bits

Comm1 port

DEC-423 (data-leads-only)

See the terminal documentation if you want more information on setting
up the terminal.
Note
If you connect the console terminal cable to one of the MMJ ports on
the back of a VT3xx terminal, you must set the port so that it can
operate as a DEC423 port. See the terminal documentation for more
information.

3. Connect the terminal cable supplied with the system (see Figure 2–2) to
MMJ port 3 on the back of the system (see Figure 2–3). Connect the other
end of the console cable to a DEC423 port on the terminal.
4. If the terminal has EIA-232 ports only, connect the EIA-232 to DEC423
adapter to the EIA-232 port on the terminal. Then connect the terminal
cable to the EIA-232 to DEC423 adapter.
Note
Some terminal cables have grond wire. You must connect this ground
wire to the grounding pillar (screw) above MMJ port 1, using the screw
provided with the cable.

2–8 Installation Procedures

Installation Procedures
2.3 Installing the BA42B System
Figure 2–3 Connecting the Console Terminal
Grounding Pillar
Terminal Cable

MLO-009832

Installation Procedures 2–9

Installation Procedures
2.3 Installing the BA42B System
2.3.1.3 Connecting the ThinWire Terminator or Loopback Connector
You can connect BA42B-based VAX 4000 Model 100 systems to either a
ThinWire Ethernet network or to a standard Ethernet network. To test the
Ethernet circuitry in the system before you connect to a network, install either
the ThinWire terminator or the standard Ethernet loopback connector.
The ThinWire terminator and the standard Ethernet loopback connector are
supplied with BA42B systems (see Figure 2–2). The ThinWire terminator
consists of a T-Connector and two end terminators. The standard Ethernet
loopback connector is a single unit.
You choose the network type using the Ethernet switch on the back of the
system (see Figure 1–2). The switch settings for the network types are as
follows:
•

Right position—ThinWire Ethernet

•

Left position—standard Ethernet

When you want to use a ThinWire Ethernet network, follow these steps:
1. Set the Ethernet switch to the right position.
2. To form a ThinWire terminator, connect the two terminators (see
Figure 2–4) to the T-Connector.
3. Connect the ThinWire terminator to the ThinWire Ethernet port on the
back of the system unit by pushing in and turning the barrel connector
clockwise until it locks (see Figure 2–4).

2–10 Installation Procedures

Installation Procedures
2.3 Installing the BA42B System
Figure 2–4 Connecting the ThinWire Terminator to the System

Terminators

T-Connector

MLO-009833

Installation Procedures 2–11

Installation Procedures
2.3 Installing the BA42B System
If you want to use a standard Ethernet network, follow these steps:
1. Set the Ethernet switch to the left position.
2. Connect the standard Ethernet loopback connector to the standard
Ethernet port on the back of the system unit (see Figure 2–5).
Figure 2–5 Connecting the Standard Ethernet Loopback Connector to the
System

Standard Ethernet Loopback Connector

MLO-009836

2–12 Installation Procedures

Installation Procedures
2.3 Installing the BA42B System
2.3.1.4 Connecting the SCSI Terminator
1. Connect the SCSI terminator to the SCSI port as shown in Figure 2–6.
2. Close the bail loops over the terminator ends.
Figure 2–6 Connecting the SCSI Terminator

MLO-009935

Installation Procedures 2–13

Installation Procedures
2.3 Installing the BA42B System
2.3.1.5 Connecting the DSSI Terminator
Connect the DSSI terminator to the DSSI port as shown in Figure 2–7.
Figure 2–7 Connecting the DSSI Terminator

MLO-009936

2–14 Installation Procedures

Installation Procedures
2.3 Installing the BA42B System
2.3.1.6 Connecting the System Unit Power Cord
A BA42B-based VAX 4000 Model 100 accepts 100 V ac to 120 V ac at 50 Hz
or 60 Hz, or 220 V ac to 240 V ac at 50 Hz or 60 Hz. The power supply is
self-sensing. You do not have to select the input voltage. To connect the system
power cord, follow these steps:
1. Set the on/off switch on the back of the system to the off (O) position.
2. Connect the power cord, supplied with the system (see Figure 2–2), to the
ac power socket on the back of the system (see Figure 2–8).
3. Connect the other end of the power cord to a grounded power outlet.
Figure 2–8 Connecting the Power Cord
Power Cord

MLO-009834

Installation Procedures 2–15

Installation Procedures
2.3 Installing the BA42B System
2.3.1.7 Turning On the System
To turn on the system, follow these steps:
1. Set the on/off switch on the terminal to the on position.
2. Set the on/off switch on the system to the on ( | ) position (see Figure 2–9).
Figure 2–9 Turning On the System

On/Off Switch

MLO-009835

Refer to the VAX 4000 Model 100, 100A, 105A, 106A KA52/KA53/KA54 CPU
System Maintenance manual for information about the self-tests that run when
you turn on the system.

2–16 Installation Procedures

Installation Procedures
2.3 Installing the BA42B System
Note
Section 2.3.2 covers the installation of either a VAX 4000 Model 100A,
105A or 106A. Turn to Section 2.3.1 to install a VAX 4000 Model 100.
The illustrations in this section randomly depict VAX 4000 Models
100A, 105A or 106A.

2.3.2 Installing a BA42B-Based VAX 4000 Model 100A/105A/106A
To install a VAX 4000 Model 100A, 105A, or 106A:
2.3.2.1 Identifying the Ports and Connectors on the System
Figure 1–2 and Figure 1–4 show the ports and connectors in VAX 4000 Models
100A and 105A. Figure 1–5 shows the ports and connectors in VAX 4000 Model
106A. Section 1.2 describes the functions of the controls, indicators, ports, and
connectors in all VAX 4000 BA42B-based systems.
2.3.2.2 Connecting the Console Terminal
To connect a console terminal to a BA42B-based VAX 4000 100A/105A/106A,
follow these steps:
1. Make sure that the on/off switch on the terminal is in the off position.
2. Set the communication parameters of the terminal (see Table 2–4).
Table 2–4 Terminal Settings
Feature

Setting

Terminal mode

VTnnn-7bit

Transmit speed

9600 baud

Receive speed

receive = transmit

Character format

8 bits, no parity

Stop bits

Comm1 port

DEC-423 (data-leads-only)

See the terminal documentation if you want more information on setting
up the terminal.

Installation Procedures 2–17

Installation Procedures
2.3 Installing the BA42B System
Note
If you connect the terminal cable to one of the MMJ ports on the back
of a VT3xx terminal, you must set the port so that it can operate as a
DEC423 port. See the terminal documentation for more information.

3. Connect the terminal cable supplied with the system (see Figure 2–2) to
MMJ port 3 on the back of the system unit (see Figure 2–10). Connect the
other end of the console cable to a DEC423 port on the terminal.
4. If the terminal has EIA-232 ports only, connect the EIA-232 to DEC423
adapter to the EIA-232 port on the terminal. Then connect the terminal
cable to the EIA-232 to DEC423 adapter.
Note
Some terminal cables have an ground wire. You must connect this
ground wire to the grounding pillar (screw) above MMJ port 1, using
the screw provided with the cable.

2–18 Installation Procedures

Installation Procedures
2.3 Installing the BA42B System
Figure 2–10 Connecting the Console Terminal

3
2

MLO-012058

! Terminal cable
" Grounding pillar

Installation Procedures 2–19

Installation Procedures
2.3 Installing the BA42B System
2.3.2.3 Connecting the ThinWire Terminator or Loopback Connector
You can connect the VAX 4000 Models 100A/105A/106A to either a ThinWire
Ethernet network or to a standard Ethernet network. To test the Ethernet
circuitry in the system before you connect to a network, install either the
ThinWire terminator or the standard Ethernet loopback connector.
The ThinWire terminator and the standard Ethernet loopback connector are
supplied with BA42B systems (see Figure 2–2). The ThinWire terminator
consists of a T-connector and two end terminators. The standard Ethernet
loopback connector is a single unit.
You choose the network type using the Ethernet switch on the back of the
system (see Figure 1–2). The switch settings for the network types are as
follows:
•

Right position—ThinWire Ethernet

•

Left position—standard Ethernet

When you want to use a ThinWire Ethernet network, follow these steps:
1. Set the Ethernet switch to the right position.
2. To form a ThinWire terminator, connect the two terminators (see
Figure 2–11) to the T-connector.
3. Connect the ThinWire terminator to the ThinWire Ethernet port on
the back of the system by pushing in and turning the barrel connector
clockwise until it locks (see Figure 2–11).

2–20 Installation Procedures

Installation Procedures
2.3 Installing the BA42B System
Figure 2–11 Connecting the ThinWire Terminator to the System

3
2

MLO-010201

! T-connector
" Terminators

Installation Procedures 2–21

Installation Procedures
2.3 Installing the BA42B System
Figure 2–12 Connecting the Standard Ethernet Loopback Connector to the
VAX 4000 Models 100A/105A/106A

3
2

MLO-012382

! Standard Ethernet loopback connector
" Ethernet cable

2–22 Installation Procedures

Installation Procedures
2.3 Installing the BA42B System
2.3.2.4 Connecting the SCSI Terminator
1. Connect the SCSI terminator to the SCSI port as shown in Figure 2–13.
2. Close the bail loops over the terminator ends.
Figure 2–13 Connecting the SCSI Terminator

3
2

1
MLO-012059

! SCSI terminator and port

Installation Procedures 2–23

Installation Procedures
2.3 Installing the BA42B System
2.3.2.5 Connecting the DSSI Terminator
Connect the DSSI terminator to the DSSI port as shown in Figure 2–14 for
Models 100A and 105A. Connect the the DSSI terminator to the DSSI port as
shown in Figure 2–15.
Figure 2–14 Connecting the DSSI Terminator - Models 100A/105A

2
1

3
2

MLO-010203

! DSSI terminator and port
" DSSI Terminators connected to optional DSSI ports

2–24 Installation Procedures

Installation Procedures
2.3 Installing the BA42B System
Figure 2–15 Connecting the DSSI Terminator - Model 106A

1
2

3
2

MLO-011871

! DSSI terminator and port
" DSSI Terminators connected to optional DSSI ports

Installation Procedures 2–25

Installation Procedures
2.3 Installing the BA42B System
2.3.2.6 Connecting the System Unit Power Cord
A VAX 4000 Model 100A/105A/106A accepts 100 V ac to 120 V ac at 50 Hz
or 60 Hz, or 220 V ac to 240 V ac at 50 Hz or 60 Hz. The power supply is
self-sensing. You do not have to select the input voltage. To connect the system
power cord, follow these steps:
1. Set the on/off switch on the back of the system to the off (O) position.
2. Connect the power cord, supplied with the system (see Figure 2–2), to the
ac power socket on the back of the system (see Figure 2–16).
3. Connect the other end of the power cord to a grounded power outlet.
Figure 2–16 Connecting the Power Cord

3
2

MLO-010204

! Power cord
2–26 Installation Procedures

Installation Procedures
2.3 Installing the BA42B System
2.3.2.7 Turning On the System
To turn on the system, follow these steps:
1. Set the on/off switch on the terminal to the on position.
2. Set the on/off switch on the system to the on ( | ) position (see Figure 2–17).
Figure 2–17 Turning On the System

3
2

MLO-010205

! On/off switch
Refer to the VAX 4000 Model 100, 100A, 105A, 106A KA52/53/54 CPU System
Maintenance manual for information about the self-tests that run when you
turn on the system.

Installation Procedures 2–27

3
Removing and Replacing Field
Replaceable Units
Note
FRUs for the BA42B-based VAX 4000 systems are the same for Models
100, 100A, 105A, and 106A except where noted. Illustrations in this
chapter depict various models.

This chapter describes how to remove and replace the Field Replaceable Units
(FRUs) in the BA42B Enclosure. Use this chapter when:
•

Removing the enclosure cover

•

Removing an MS44 or MS44L memory module

•

Removing the upper drive-mounting shelf

•

Removing an RX26/RX23 diskette drive assembly

•

Removing a TZ30 tape drive

•

Removing a TZK10/TZK11 tape drive

•

Removing a TLZ06/TLZ07 tape drive

•

Removing an RZ-series disk drive

•

Removing an RF31T/RF35/RF36 disk drive

•

Removing an RRD42 CDROM drive

•

Removing an RRD43 CDROM drive

•

Removing the upper and lower drive-mounting shelf combination

•

Removing the SCSI cable

•

Removing the DSSI cable

•

Removing the DSSI daughter board

Removing and Replacing Field Replaceable Units 3–1

Removing and Replacing Field Replaceable Units

•

Removing a DSW42 synchronous communications option

•

Removing a DHW42 asynchronous communications option

•

Removing the CPU module

•

Replacing the CPU module

•

Removing the power supply
Note
Unless otherwise specified, you can replace a FRU by reversing the
steps described in the removal procedure.

Table 3–1 lists the major FRUs in the BA42B Enclosure. It also gives the
order numbers for the FRUs and a reference to a section in this chapter
that gives information on how to replace the FRU. Refer to the VAX 4000
BA42B Enclosure System Options manual for more information about options.
Appendix C gives a complete list of the spare parts for the BA42B Enclosure.
Figure 3–1 shows the locations of the major FRUs in the BA42B Enclosure.
Caution

•

Only qualified personnel should remove or install the FRUs.

•

Before you remove or install the FRUs, turn off the system and
disconnect the power cord.

•

Static electricity can damage integrated circuits. Wear a wrist
strap and place an antistatic mat under the system when working
with the internal parts of the system unit.

You must have the following tools to replace the FRUs in a BA42B-based VAX
system:
•

A number 1, Phillips screwdriver

•

A blade screwdriver

3–2 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units

Table 3–1 Major FRUs in the BA42B Enclosure
FRU

Order Numbers

Section

Memory module

MS44-BC, MS44L-DC

3.2

Diskette drive

RX26-AA, RX23-AA

3.4

TZ30 tape drive

TZ30-AA

3.5

TZK10/TZK11 tape drive

TZK10-AA, TZK11-AA

3.6

TLZ06/TLZ07 tape drive

TLZ06-AA, TLZ07-AA

3.7

RF31T/RF35/RF36

RF31T-EA/RF35-EA
/RF36-EA

3.9

RRD42 CDROM drive

RRD42-AA

3.10

RRD43 CDROM drive

RRD43-AA

3.11

Single DSSI daughter board or
Dual DSSI daughter board

54-21837-01
54-22444-01

3.15

Synchronous communications option

DSW42-AA

3.16

Asynchronous communications option

DHW42-AA, -BA, -CA

3.17

KA52 CPU module (Model 100/100A) or
KA53 CPU module (Model 105A) or
KA54 CPU module (Model 106A)

54-21797-01
54-21797-02
54-21797-03

3.18

Power supply

30-35042-01

3.20

Note
Figure 3–1 shows a VAX 4000 Model 100 as an example. VAX 4000
Models 100A, 105A and 106A have the same FRUs in the same
locations.

Removing and Replacing Field Replaceable Units 3–3

Removing and Replacing Field Replaceable Units

Figure 3–1 Major FRUs in the BA42B Enclosure
RF* Disk Drives
Upper Drive
Mounting Shelf

TZ30 or
TLZ06 Tape Drive, or
TZK10/11 Tape Drive, or
RX26 Diskette Drive, or
RRD42/43 CDROM Drive

DSW42 Input/Output Module
DSW42 Input/Output Cable
DSW42 Logic Board
Power Supply Unit

DHW42 Logic Board
DHW42 Input/Output Module
DHW42 Input/Output Cable
CPU Module
Note: RF * denotes RF31T/RF35/RF36 Disk Drives

Lower Drive
Mounting Shelf

TZK10/11 Tape Drive
(Optionally,
TLZ06 Tape Drive, or
TZ30 Tape Drive, or
RX26 Diskette Drive, or
RRD42/43 CDROM Drive

MS44/MS44L Memory
Module
DSSI Module

MLO-012378

3–4 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.1 Removing the Enclosure Cover

3.1 Removing the Enclosure Cover
To remove the enclosure cover, follow these steps:
1. Set the on/off switch on the system to the off (O) position.
2. Disconnect the cables, loopback connectors, and terminators that are
connected to the system.
3. Loosen the two captive screws (12-30338-05) on the back of the system unit
(refer to Figure 3–2).
4. Slide the cover forward and lift it up from the system unit.
Figure 3–2 Removing the Enclosure Cover

3
2

1
MLO-010953

! Captive screws (2)
" Enclosure cover

Removing and Replacing Field Replaceable Units 3–5

Removing and Replacing Field Replaceable Units
3.2 Removing an MS44 or MS44L Memory Module

3.2 Removing an MS44 or MS44L Memory Module
To remove a memory module:
1. Remove the ac power from the BA42B Enclosure.
2. Remove the enclosure cover (refer to Section 3.1).
Caution
Static electricity can damage integrated circuits. Wear a wrist strap
and place an antistatic mat under the system unit when working with
the internal parts of the system unit.

3. Locate the faulty memory module. Figure 3–3 shows the location of the
memory module connectors on the KA52/KA53 CPU module.
Note

•

Note the position of the faulty memory module on the CPU
module. You must install the replacement in the same position.
See Section 1.5.1 for memory configurations.

•

You may have to remove one or two memory modules to reach
the faulty memory module. Note carefully the position of each
memory module you remove.

3–6 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.2 Removing an MS44 or MS44L Memory Module
Figure 3–3 Memory Module Connectors on the KA52/53/54 CPU Module
MS44 or MS44L Memory Modules (4)

MLO-009839

4. Push the metal board clips on the memory module connector away from
the center. Tilt the memory module toward the back of the enclosure, and
lift the memory module out of its connector (refer to Figure 3–4).
Caution
When installing a memory module, note that the connectors on the
CPU module are keyed so that you cannot install the memory module
with an incorrect orientation. Do not try to force a module into a
connector.

Removing and Replacing Field Replaceable Units 3–7

Removing and Replacing Field Replaceable Units
3.2 Removing an MS44 or MS44L Memory Module
Figure 3–4 Removing a Memory Module

Metal Board Clip

MS44 Memory Modules

MLO-009876

3–8 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.3 Removing the Upper Drive-Mounting Shelf

3.3 Removing the Upper Drive-Mounting Shelf
To reach some of the FRUs in the BA42B Enclosure, you must remove the
upper drive-mounting shelf. Depending on the system configuration, the
upper drive-mounting shelf can contain one, two, or three disk drives. You
can remove the upper drive-mounting shelf with the disk drives attached. To
remove the upper drive-mounting shelf, follow these steps:
1. Remove the enclosure cover (see Section 3.1).
Note
When disconnecting the cables, you must note which cables connect to
which drives. On the DSSI cable, note the number on the connector
pull-tab.

2. Disconnect the power cables from the power supply unit. Figure 3–5 shows
where to disconnect the power cables in the BA42B Enclosure.
Note
Some systems have an additional two-pin pigtail DSSI power cable
which must be disconnected from the CPU module before removing the
shelf.

Removing and Replacing Field Replaceable Units 3–9

Removing and Replacing Field Replaceable Units
3.3 Removing the Upper Drive-Mounting Shelf
Figure 3–5 Removing the Upper Drive-Mounting Shelf

MLO-012287

! Internal power cable
" Internal power cable with pigtailed DSSI power cable
# CPU module DSSI power cable connector

3–10 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.3 Removing the Upper Drive-Mounting Shelf
3. Disconnect the DSSI cable from the disk drives by pulling the pull-tabs.
Figure 3–6 shows a typical signal cable being disconnected the BA42B
Enclosure.
Figure 3–6 Disconnecting the DSSI Cables from the Drives

MLO-010804

! Internal DSSI connector

4. Loosen the three captive screws (see Figure 3–7).

Removing and Replacing Field Replaceable Units 3–11

Removing and Replacing Field Replaceable Units
3.3 Removing the Upper Drive-Mounting Shelf
Figure 3–7 Removing the Upper Drive-Mounting Shelf
Captive
Screws (3)

Upper Drive
Mounting Shelf
RE_EN06232A_91

5. Lift the left side of the upper drive-mounting shelf, and pull the drivemounting shelf to the left until the tabs on the right side of the mounting
shelf are clear of the cutouts in the lower drive-mounting shelf.
6. Remove the upper drive-mounting shelf from the enclosure.

3–12 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.4 Removing the RX26/RX23 Diskette Drive Assembly

3.4 Removing the RX26/RX23 Diskette Drive Assembly
The RX26 diskette drive assembly (when installed) is positioned on the left
side or the right side of the lower drive-mounting shelf when viewed from the
front. The RX26 diskette drive assembly contains three FRUs as follows:
•

RX26-AA or RX23-AA diskette drive

•

RX26/RX23 FDI/SCSI board (54-20764-02)

•

RX26/RX23 ribbon cable (17-00285-00)

The following procedure describes how to remove an RX26/RX23 diskette drive
assembly from the right side of the lower drive-mounting shelf. The procedure
for removing the RX26/RX23 diskette drive assembly from the left side of the
lower drive-mounting shelf is the same. To remove the RX26/RX23 diskette
drive assembly from the BA42B Enclosure, follow these steps:
1. Remove the enclosure cover (refer to Section 3.1).
2. Remove the upper drive-mounting shelf (refer to Section 3.3).
Note
When disconnecting the cables, you must note which cables connect to
which drives. On the SCSI cable, note the number on the connector
pull-tab.

3. Disconnect the power cable from the back of the RX26/RX23 diskette drive.
Figure 1–6 shows the power cables in the BA42B Enclosure.
4. Disconnect the power cable from the floppy diskette interface/small
computer system interface (FDI/SCSI) board.
5. Disconnect the SCSI cable from the back of the FDI/SCSI board by pulling
the pull-tab. Figure 1–7 shows the signal cables in the BA42B Enclosure.
6. Loosen the captive screw securing the mounting bracket to the lower
drive-mounting shelf (refer to Figure 3–8).

Removing and Replacing Field Replaceable Units 3–13

Removing and Replacing Field Replaceable Units
3.4 Removing the RX26/RX23 Diskette Drive Assembly
Figure 3–8 Removing the RX26/RX23 Diskette Drive Assembly
RX26 Diskette Drive
Captive Screw

RE_EN06234A_91

7. Lift the left side of the RX26/RX23 diskette drive assembly and pull the
diskette drive assembly to the left until the tabs on the right side of the
mounting bracket are clear of the cutouts in the lower drive-mounting
shelf.
8. Lift the RX26/RX23 diskette drive assembly out of the BA42B Enclosure.

3.4.1 Removing the RX26/RX23 FDI/SCSI Board
To remove the FDI/SCSI board from the RX26/RX23 mounting bracket, follow
these steps:
1. Disconnect the ribbon cable that connects the RX26/RX23 diskette drive to
the RX26/RX23 FDI/SCSI board.
2. Turn the RX26/RX23 diskette drive assembly over so that the base of the
mounting bracket faces up.

3–14 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.4 Removing the RX26/RX23 Diskette Drive Assembly
3. Press firmly on the front edge of the FDI/SCSI board with your finger.
When the two holes on the front edge of the FDI/SCSI board are clear of
the tabs in the RX26/RX23 mounting bracket, slide the RX26/RX23 FDI
/SCSI board out of the RX26/RX23 mounting bracket (refer to Figure 3–9).
Figure 3–9 Removing the RX26/RX23 FDI/SCSI Board

Hole in RX26 FDI Board (2)
RE_EN06235A_91

3.4.2 Separating the RX26/RX23 Diskette Drive from the Mounting
Bracket
When you are installing a replacement RX26/RX23 diskette drive, you must
use the mounting bracket (70-29669-01) that is attached to the faulty RX26
/RX23 diskette drive (RX26-AA or RX23-AA). To separate the RX26/RX23
diskette drive from its mounting bracket, follow these steps:
1. Remove the four screws (90-10961-03) securing the RX26/RX23 mounting
bracket to the RX26/RX23 diskette drive.
2. Separate the mounting bracket from the RX26/RX23 diskette drive (refer to
Figure 3–10).

Removing and Replacing Field Replaceable Units 3–15

Removing and Replacing Field Replaceable Units
3.4 Removing the RX26/RX23 Diskette Drive Assembly
Figure 3–10 Separating the Mounting Bracket from the RX26/RX23 Diskette
Drive

Philips Screws (4)
RX26 Mounting Bracket
RX26 Diskette Drive

RE_EN06452A_91

3.4.3 Setting the SCSI ID on the Replacement RX26/RX23 FDI/SCSI
Board
When replacing the FDI/SCSI board, you must set the SCSI ID of the
replacement board to the SCSI ID of the board you remove. To set the SCSI ID
on a replacement RX26/RX23 FDI/SCSI board, follow these steps:
1. Note the SCSI ID switch settings on the RX26/RX23 FDI/SCSI board you
removed. Figure 3–11 shows the location of the SCSI ID switches on the
FDI/SCSI board.
2. Set the SCSI ID switches on the replacement RX26/RX23 FDI/SCSI board
to the same settings as the SCSI ID switches of the RX26/RX23 FDI/SCSI
board you removed.

3–16 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.4 Removing the RX26/RX23 Diskette Drive Assembly
Figure 3–11 Location of the SCSI ID Switches on the RX26/RX23 FDI/SCSI
Board

Note: The switch is off in the up position

SCSI ID Switches

RE_EN06236A_91

After you install the FDI/SCSI board and connect the RX26/RX23 ribbon cable,
you can reach the SCSI ID switches through a ventilation slot in the mounting
bracket (refer to Figure 3–12).

Removing and Replacing Field Replaceable Units 3–17

Removing and Replacing Field Replaceable Units
3.4 Removing the RX26/RX23 Diskette Drive Assembly
Figure 3–12 How to Reach the SCSI ID Switches on the RX26/RX23 FDI/SCSI
Board

Note: The SCSI ID shown is 4 (S1 is on, S2 is off, and S3 is off).
RE_EN06471A_91

3–18 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.5 Removing a TZ30 Tape Drive

3.5 Removing a TZ30 Tape Drive
In the VAX 4000 Models 100, 100A, 105A, 106A the TZ30 tape drive is
always mounted in the right-hand position of the lower drive-mounting shelf,
when viewed from the front. To remove a TZ30 tape drive from the BA42B
Enclosure, follow these steps:
1. Remove the enclosure cover (refer to Section 3.1).
2. Remove the upper drive-mounting shelf (refer to Section 3.3).
Note

•

You can disconnect the cables from the drive more easily after
you remove the drive from the drive-mounting shelf.

•

When disconnecting the cables, you must note which cables
connect to which drives. On the SCSI cable, note the number
on the connector pull-tab.

3. Loosen the captive screw that secures the mounting bracket to the
drive-mounting shelf (refer to Figure 3–13).

Removing and Replacing Field Replaceable Units 3–19

Removing and Replacing Field Replaceable Units
3.5 Removing a TZ30 Tape Drive
Figure 3–13 Removing a TZ30 Tape Drive
TZ30 Tape Drive
Captive Screw

RE_EN06237A_91

4. Lift the left side of the TZ30 tape drive. Slide the TZ30 tape drive to the
left until the tabs on the right side of the mounting bracket are clear of the
cutouts in the drive-mounting shelf.
5. Disconnect the power cable from the flying lead connector of the TZ30 tape
drive. Figure 1–6 shows the power cables in the BA42B Enclosure.
6. Disconnect the SCSI cable from the TZ30 tape drive by pulling the pull-tab.
Figure 1–7 shows the signal cables in the BA42B Enclosure.
7. Lift the TZ30 tape drive, which has its mounting bracket attached, out of
the system unit.

3–20 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.5 Removing a TZ30 Tape Drive

3.5.1 Separating the TZ30 Tape Drive from the Mounting Bracket
When you are installing a replacement TZ30 tape drive, you must use the
mounting bracket (74-42115-01) that is attached to the faulty TZ30 tape drive
(TZ30-AA). To separate the mounting bracket from the faulty TZ30 tape drive,
follow these steps:
1. Remove the two screws (90-09984-07) from the right side of the mounting
bracket with a Phillps screwdriver (refer to Figure 3–14).
2. Remove one screw (90-09984-07) from the left side of the mounting bracket
(refer to Figure 3–14).
3. Remove one screw (90-10961-03) from the bottom of the drive mounting
bracket (refer to Figure 3–14).
4. Separate the mounting bracket from the TZ30 tape drive.
Figure 3–14 Separating the Mounting Bracket from the TZ30 Tape Drive

Philips Screw

Philips Screws (3)
TZ30 Mounting Bracket
TZ30 Tape Drive
RE_EN06453A_91

5. Keep the mounting bracket and the four screws in a safe place because you
must use them to install the replacement TZ30 tape drive.

Removing and Replacing Field Replaceable Units 3–21

Removing and Replacing Field Replaceable Units
3.5 Removing a TZ30 Tape Drive

3.5.2 Setting the SCSI ID on the Replacement TZ30 Tape Drive
To set the SCSI ID on the replacement TZ30 tape drive, follow these steps:
1. Note the SCSI ID switch settings on the TZ30 tape drive you removed.
Figure 3–15 shows the location of the SCSI ID switches and the
recommended SCSI ID for tape drives.
2. Set the SCSI ID switches on the replacement TZ30 tape drive to the same
settings as the SCSI ID switches on the TZ30 tape drive you removed.
Figure 3–15 TZ30 SCSI ID Switch Locations

4
3
2
1
On
Off
Notes: 1. S1 is not used (always on).
2. The SCSI ID shown is 5 (S2 is on, S3 is off, and S4 is on).
RE_EN06238A_91

Refer to the VAX 4000 BA42B Enclosure System Options manual for more
information about setting the SCSI ID of the TZ30 tape drive.

3–22 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.6 Removing a TZK10/TZK11 Tape Drive

3.6 Removing a TZK10/TZK11 Tape Drive
The TZK10/TZK11 tape drive (when installed) can be on the right side or the
left side of the lower drive-mounting shelf, when viewed from the front. The
following procedure describes how to remove a TZK10/TZK11 tape drive from
the right side of the lower drive-mounting shelf. The procedure for removing
the TZK10/TZK11 tape drive from the left side of the lower drive-mounting
shelf is the same. To remove a TZK10/TZK11 tape drive from the BA42B
Enclosure, follow these steps:
1. Remove the enclosure cover (refer to Section 3.1).
2. Remove the upper drive-mounting shelf (refer to Section 3.3).
Note

•

You can disconnect the cables from the drive more easily after
you remove the drive from the drive-mounting shelf.

•

When you disconnect the cables, note which cables connect
to which drives. On the SCSI cable, note the number on the
connector pull-tab.

3. Loosen the captive screw that secures the mounting bracket to the
drive-mounting shelf (refer to Figure 3–16).

Removing and Replacing Field Replaceable Units 3–23

Removing and Replacing Field Replaceable Units
3.6 Removing a TZK10/TZK11 Tape Drive
Figure 3–16 Removing the TZK10/TZK11 Tape Drive
TZK10 Tape Drive
Captive Screw

RE_EN06239A_91

4. Lift the left side of the TZK10/TZK11 tape drive. Slide the TZK10/TZK11
tape drive to the left until the tabs on the right side of the mounting
bracket are clear of the cutouts in the lower drive-mounting shelf.
5. Disconnect the power cable from the back of the TZK10/TZK11 tape drive.
Figure 1–6 shows the power cables in the BA42B Enclosure.
6. Disconnect the SCSI cable from the back of the TZK10/TZK11 tape drive
by pulling the pull-tab. Figure 1–7 shows the signal cables in the BA42B
Enclosure.
7. Lift the TZK10/TZK11 tape drive out of the system unit.

3–24 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.6 Removing a TZK10/TZK11 Tape Drive

3.6.1 Separating the TZK10/TZK11 Tape Drive from the Mounting
Bracket
When you install a replacement TZK10/TZK11 tape drive, you must use the
mounting bracket (74-42449-01) that is attached to the faulty TZK10/TZK11
tape drive (TZK10-AA, TZK11-AA). To separate the mounting bracket from the
faulty TZK10/TZK11 tape drive, follow these steps:
1. Note which holes are used for attaching the mounting bracket to the drive
before you remove it. You must use the same holes for the replacement.
2. Remove the four screws (90-10961-03) that secure the mounting bracket to
the TZK10/TZK11 tape drive (refer to Figure 3–17).
3. Separate the mounting bracket from the TZK10/TZK11 tape drive.
Figure 3–17 Separating the Mounting Bracket from the TZK10/TZK11 Tape
Drive

Phillips Screws (4)
TZK10 Mounting Bracket
TZK10 Tape Drive
MLO-009938

4. Keep the mounting bracket and the four screws in a safe place because you
must use them to install the replacement TZK10/TZK11 tape drive.

Removing and Replacing Field Replaceable Units 3–25

Removing and Replacing Field Replaceable Units
3.6 Removing a TZK10/TZK11 Tape Drive

3.6.2 Setting the SCSI ID of the Replacement TZK10/TZK11 Tape Drive
To set the SCSI ID of the replacement TZK10/TZK11 tape drive, follow these
steps:
1. Note the positions of the SCSI ID jumper wires on the TZK10/TZK11 tape
drive you removed. Figure 3–18 shows the location of the SCSI ID jumper
wires and the recommended SCSI ID for tape drives.
2. Set the SCSI ID jumper wires on the replacement TZK10/TZK11 tape drive
to the same positions as the SCSI ID switches of the TZK10/TZK11 tape
drive you removed.

3–26 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.6 Removing a TZK10/TZK11 Tape Drive
Figure 3–18 Locations of the SCSI ID Jumper Wires on the TZK10/TZK11
Tape Drive

SCSI ID
Jumper Wires

Parity 2

1 0

SCSI ID
Select
Note: The SCSI ID shown is 5.
RE_EN06240A_91

Refer to the VAX 4000 BA42B Enclosure System Options manual for more
information about setting the SCSI ID of the TZK10/TZK11 tape drives.

Removing and Replacing Field Replaceable Units 3–27

Removing and Replacing Field Replaceable Units
3.7 Removing a TLZ06/TLZ07 Tape Drive

3.7 Removing a TLZ06/TLZ07 Tape Drive
The TLZ06/TLZ07 tape drive (when installed) can be on the right side or the
left side of the lower drive-mounting shelf, when viewed from the front. The
following procedure describes how to remove a TLZ06/TLZ07 tape drive from
the right side of the lower drive-mounting shelf. The procedure for removing
the TLZ06/TLZ07 tape drive from the left side of the lower drive-mounting
shelf is the same. To remove a TLZ06/TLZ07 tape drive from the BA42B
Enclosure, follow these steps:
1. Remove the enclosure cover (refer to Section 3.1).
2. Remove the upper drive-mounting shelf (refer to Section 3.3).
Note

•

You can disconnect the cables from the drive more easily after
you remove the drive from the drive-mounting shelf.

•

When you disconnect the cables, note which cables connect
to which drives. On the SCSI cable, note the number on the
connector pull-tab.

3. Loosen the captive screw that secures the mounting bracket to the
drive-mounting shelf (refer to Figure 3–19).

3–28 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.7 Removing a TLZ06/TLZ07 Tape Drive
Figure 3–19 Removing the TLZ06/TLZ07 Tape Drive
TLZ06 Tape Drive
Captive Screw

MLO-009826

4. Lift the left side of the TLZ06/TLZ07 tape drive. Slide the TLZ06/TLZ07
tape drive to the left until the tabs on the right side of the mounting
bracket are clear of the cutouts in the lower drive-mounting shelf.
5. Disconnect the power cable from the back of the TLZ06/TLZ07 tape drive.
Figure 1–6 shows the power cables in the BA42B Enclosure.
6. Disconnect the SCSI cable from the back of the TLZ06/TLZ07 tape drive
by pulling the pull-tab. Figure 1–7 shows the signal cables in the BA42B
Enclosure.
7. Lift the TLZ06/TLZ07 tape drive out of the system unit.

Removing and Replacing Field Replaceable Units 3–29

Removing and Replacing Field Replaceable Units
3.7 Removing a TLZ06/TLZ07 Tape Drive

3.7.1 Separating the TLZ06/TLZ07 Tape Drive from the Mounting
Bracket
When you install a replacement TLZ06/TLZ07 tape drive, you must use the
mounting bracket (74-42449-01) that is attached to the faulty TLZ06/TLZ07
tape drive (TLZ06-AA, TLZ07-AA). To separate the mounting bracket from the
faulty TLZ06/TLZ07 tape drive, follow these steps:
1. Note which holes are used for attaching the mounting bracket to the drive
before you remove it. You must use the same holes for the replacement.
2. Remove the four screws (90-10961-03) that secure the mounting bracket
to the TLZ06/TLZ07 tape drive with a Phillips screwdriver (refer to
Figure 3–20).
3. Separate the mounting bracket from the TLZ06/TLZ07 tape drive.
Figure 3–20 Separating the Mounting Bracket from the TLZ06/TLZ07 Tape
Drive

Phillips Screws (4)
TLZ06 Mounting Bracket
TLZ06 Tape Drive
MLO-009937

4. Keep the mounting bracket and the four screws in a safe place because you
must use them to install the replacement TLZ06/TLZ07 tape drive.

3–30 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.7 Removing a TLZ06/TLZ07 Tape Drive

3.7.2 Setting the SCSI ID and Option Switches of the Replacement
TLZ06/TLZ07 Tape Drive
To set the SCSI ID and option switches of the replacement TLZ06/TLZ07 tape
drive, follow these steps:
1. Note the positions of the SCSI ID and option switches on the TLZ06/TLZ07
tape drive you removed. Figure 3–21 shows the location of the SCSI ID
and option switches and the recommended SCSI ID for tape drives.
2. Set the SCSI ID and option switches on the replacement TLZ06/TLZ07 tape
drive to the same positions as the SCSI ID switches of the TLZ06/TLZ07
tape drive you removed.
Figure 3–21 Locations of the SCSI ID and Option Switches on the TLZ06
/TLZ07 Tape Drive

O
F
F

Mode and SCSI
Address Switches

GA_EN00144A_92A

Refer to the VAX 4000 BA42B Enclosure System Options manual for more
information about setting the SCSI ID and option switches on TLZ06/TLZ07
tape drives.

Removing and Replacing Field Replaceable Units 3–31

Removing and Replacing Field Replaceable Units
3.8 Removing an RZ-Series Disk Drive

3.8 Removing an RZ-Series Disk Drive
Depending on the system configuration, the upper drive-mounting shelf can
contain one, two, or three SCSI disk drives. The disk drives can be any
combination of the RZ-series disk drives. The RZ-series disk drives include the
following devices:
•

RZ23L disk drive

•

RZ24 disk drive

•

RZ24L disk drive

•

RZ25 disk drive

•

RZ25L disk drive

•

RZ25M disk drive

•

RZ26 disk drive

•

RZ26L disk drive

•

RZ28 disk drive

An RZ-series disk drive on the upper drive-mounting shelf may be removed
from the the BA42B enclosure without removing the shelf (see Section 3.8.1).
To remove an RZ-series drive on the lower shelf, it is first necessary to remove
the upper shelf (see Section 3.8.2).

3.8.1 Removing an RZ-Series Disk Drive from the Upper
Drive-Mounting Shelf
To remove an RZ-series disk drive from the upper drive-mounting shelf, follow
these steps:
1. Remove the enclosure cover (see Section 3.1).
Note

•

You can disconnect the cables from a disk drive more easily
after you remove the disk drive from the drive-mounting shelf.

•

When disconnecting cables, you must note which cables connect
to which drives. On the SCSI cable, note the number on the
connector pull-tab.

2. Press and hold the spring clip that locks the disk drive in position.
3–32 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.8 Removing an RZ-Series Disk Drive
3. Push the disk drive towards the spring clip until the rubber grommets
under the disk drive are released from the cutouts in the drive-mounting
shelf (see Figure 3–22). Lift the disk drive up from the drive-mounting
shelf and release the spring clip.
4. Disconnect the SCSI cable from the back of the disk drive by pulling the
pull-tab.
Figure 1–7 shows the signal cables in the BA42B enclosure.
5. Disconnect the power cable from the back of the disk drive.
Figure 1–6 shows the power cables in the BA42B enclosure.
Figure 3–22 Removing RZ-Series Disk Drives from the Upper Drive-Mounting
Shelf

RZ24 Disk Drive
Spring Clip

GA_EN00225A_92A

Removing and Replacing Field Replaceable Units 3–33

Removing and Replacing Field Replaceable Units
3.8 Removing an RZ-Series Disk Drive

3.8.2 Removing an RZ-Series Disk Drive from the Lower
Drive-Mounting Shelf
Depending on the system configuration, RZ-series disk drives may be installed
on the left side and the right side of the lower drive-mounting shelf, when
viewed from the front. To remove an RZ-series disk drive from the lower
drive-mounting shelf, follow these steps:
1. Remove the enclosure cover (see Section 3.1).
2. Remove the upper drive-mounting shelf (see Section 3.3).
Note

•

You can disconnect the cables from a disk drive more easily
after you remove the drive from the drive-mounting shelf.

•

When disconnecting the cables, you must note which cables
connect to which drives. On the SCSI cable, note the number
on the connector pull-tab.

3. Press and hold the spring clip that locks the disk drive in position (see
Figure 3–23).
4. Push the disk drive towards the spring clip until the rubber grommets
under the disk drive are released from the cutouts in the drive-mounting
shelf (see Figure 3–23). Lift the disk drive up from the lower drivemounting shelf, and release the spring clip.
5. Disconnect the SCSI cable from the back of the disk drive by pulling the
pull-tab.
Figure 1–7 shows the signal cables in the BA42B enclosure.
6. Disconnect the power cable from the back of the disk drive.
Figure 1–6 shows the power cables in the BA42B enclosure.
7. Remove the support plate from the disk drive (see Section 3.8.3).

3–34 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.8 Removing an RZ-Series Disk Drive
Figure 3–23 Removing an RZ-Series Disk Drive from the Lower DriveMounting Shelf

RZ24 Disk Drive

Spring Clip

RE_EN06233A_91

Removing and Replacing Field Replaceable Units 3–35

Removing and Replacing Field Replaceable Units
3.8 Removing an RZ-Series Disk Drive

3.8.3 Separating the Support Plate from an RZ23L or RZ24 Disk Drive
When you are replacing an RZ23L or RZ24 disk drive, you must remove the
support plate (74-41364-01) and the rubber grommets (12-31734-01) that are
attached to the faulty disk drive (RZ23L-E or RZ24-E) and install these items
on the replacement drive. The following procedure describes how to remove the
support plate and rubber grommets from an RZ23L disk drive. The procedure
for removing the support plate and rubber grommets from an RZ24 disk drive
is the same. To remove the support plate and rubber grommets from an RZ23L
disk drive, follow these steps:
1. Position the disk drive so that the bottom of the disk drive faces up.
2. Remove the four screws and attached grommets (see Figure 3–24). These
screws secure the support plate to the disk drive.
3. Remove the support plate from the disk drive.
4. Keep the four screws with the attached grommets and the support plate in
a safe place. You must install them on the replacement disk drive.

3–36 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.8 Removing an RZ-Series Disk Drive
Figure 3–24 Separating the Support Plate from the Disk Drive

Grommets (4)

Support Plate

RZ23L Disk Drive

RE_EN06451A_91

Removing and Replacing Field Replaceable Units 3–37

Removing and Replacing Field Replaceable Units
3.8 Removing an RZ-Series Disk Drive

3.8.4 Separating the Mounting Bracket from an RZ24L, RZ25, RZ25L,
RZ26, RZ26L, or RZ28 Disk Drive
When you are replacing an RZ24L, RZ25, RZ25L, RZ25M, RZ26, RZ26L, or
RZ28 disk drive, you must remove the mounting bracket (74-44226-01) and the
rubber grommets (12-31734-01) that are attached to the faulty disk drive and
install these items on the replacement drive. The following procedure describes
how to remove the mounting bracket and rubber grommets from an RZ26 disk
drive. The procedure for removing the mounting bracket and rubber grommets
from the other disk drives is the same. To remove the mounting bracket and
rubber grommets from an RZ26 disk drive, follow these steps:
1. Position the disk drive so that the bottom of the disk drive faces up.
2. Remove the four screws and attached grommets (see Figure 3–25). These
screws secure the mounting bracket to the disk drive.
3. Remove the mounting bracket from the disk drive.
4. Keep the four screws with the attached grommets and the mounting
bracket in a safe place. You must install them on the replacement disk
drive.

3–38 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.8 Removing an RZ-Series Disk Drive
Figure 3–25 Separating the Mounting Bracket from the RZ26 Disk Drive
Grommets

Mounting
Bracket

MLO-011302

Removing and Replacing Field Replaceable Units 3–39

Removing and Replacing Field Replaceable Units
3.8 Removing an RZ-Series Disk Drive

3.8.5 Setting the SCSI ID on the Replacement Disk Drive
To set the SCSI ID on a replacement disk drive, follow these steps:
1. Note the SCSI ID switch settings on the disk drive you removed. The
locations of the SCSI ID jumper wires on the various types of disk drive
are shown in the following figures:
•

RZ23L—see Figure 3–26

•

RZ24—see Figure 3–27

•

RZ24L—see Figure 3–28

•

RZ25—see Figure 3–29

•

RZ25L—see Figure 3–30

•

RZ25M—see Figure 3–31

•

RZ26—see Figure 3–32

•

RZ26L—see Figure 3–32

•

RZ28—see Figure 3–32

2. Set the SCSI ID switches on the replacement disk drive to the same
settings as the SCSI ID switches of the disk drive you removed.
See the VAX 4000 BA42B Enclosure Systems Options manual for more
information about setting the SCSI ID of the RZ-series disk drives.

3–40 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.8 Removing an RZ-Series Disk Drive
Figure 3–26 RZ23L Disk Drive SCSI ID Jumper Wire Locations

RE_EN06357A_91

Figure 3–27 RZ24 Disk Drive SCSI ID Jumper Wire Locations
SCSI Connector

E1 E2 E3

SCSI ID Jumper Wires

Power Connector
RE_EN05183A_90

Removing and Replacing Field Replaceable Units 3–41

Removing and Replacing Field Replaceable Units
3.8 Removing an RZ-Series Disk Drive
Figure 3–28 RZ24L Disk Drive SCSI ID Jumper Wire Locations

A0
A2 A1

GA_EN00180A_92A

3–42 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.8 Removing an RZ-Series Disk Drive
Figure 3–29 RZ25 Disk Drive SCSI ID Jumper Wire Locations

P3 P2 P1

RE_EN06365C_91

Removing and Replacing Field Replaceable Units 3–43

Removing and Replacing Field Replaceable Units
3.8 Removing an RZ-Series Disk Drive
x>(Jumper wiresRZ25L)
Figure 3–30 RZ25L Disk Drive SCSI ID Jumper Wire Locations
Grommets

Mounting
Bracket

A0 A1

A2 A1
Power
Connector

SCSI
Connector

MLO-012054

3–44 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.8 Removing an RZ-Series Disk Drive
Figure 3–31 RZ25M Disk Drive SCSI ID Jumper Wire Locations
6

4
2

SCSI
Connector
Power
Connector

Mounting
Bracket

Grommets

MLO-013146

Removing and Replacing Field Replaceable Units 3–45

Removing and Replacing Field Replaceable Units
3.8 Removing an RZ-Series Disk Drive
Figure 3–32 RZ26/RZ26L/RZ28 Disk Drive SCSI ID Jumper Wire Locations

2
0 1

GA_EN00184A_92A

Note
Figure 3–32 shows an RZ26 as an example. The SCSI ID jumpers on
the RZ26L and RZ28 are identical.

3–46 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.9 Removing an RF31T/RF35/RF36 Disk Drive

3.9 Removing an RF31T/RF35/RF36 Disk Drive
Note
RF-series disk drives are only installed on the upper drive mounting
shelf in a BA42B enclosure. The illustrations in this section show how
to remove and install the RF-series drive in the left-hand position of
the upper drive-mounting shelf, when viewed from the front.

To remove an RF-series drive from the BA42B Enclosure, follow these steps:
1. Remove the enclosure cover (refer to Section 3.1).
Note

•

You can disconnect the cables from the drive more easily after
you remove the drive from the drive-mounting shelf.

•

When you disconnect the cables, you must note which cables
connect to which drives. On the DSSI cable, note the number
on the connector pull-tab.

2. Depress the spring clip that secures the mounting bracket to the drivemounting shelf (refer to Figure 3–33).

Removing and Replacing Field Replaceable Units 3–47

Removing and Replacing Field Replaceable Units
3.9 Removing an RF31T/RF35/RF36 Disk Drive
Figure 3–33 Removing a Sample RF31T/RF35/RF36 Disk Drive Option
RF-Series Disk Drive
RF-Series Disk Drive

Spring Clip
MLO-012389

3. Slide the drive forward until the rubber grommets attached to the
mounting bracket are clear of the cutouts in the lower drive-mounting
shelf.
4. Disconnect the power cable from the back of the RF-series drive.
Figure 1–6 shows the power cables in the BA42B Enclosure.
5. Disconnect the DSSI cable from the back of the RF-series drive by pulling
the pull-tab. Figure 1–7 shows the signal cables in the BA42B Enclosure.
6. Lift the RF-series drive, which has its bracket attached, out of the system
unit.

3.9.1 Separating the RF-series Drive from the Mounting Bracket
When you install a replacement RF-series drive, you must use the mounting
bracket (74-744226-01) that is attached to the faulty RF-series drive. To
separate the mounting bracket from the faulty drive, follow these steps:
1. Note how the bracket is attached in relationship to the RF-series drive.
2. Remove the four screws (12-31734-01) that secure the grommets and the
mounting bracket to the RF-series drive.
3. Separate the mounting bracket from the RF-series drive (refer to
Figure 3–34).

3–48 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.9 Removing an RF31T/RF35/RF36 Disk Drive
Figure 3–34 Separating the Mounting Bracket from the RF-Series Drive

G ro m me ts

LJ-02164-TI0

Removing and Replacing Field Replaceable Units 3–49

Removing and Replacing Field Replaceable Units
3.9 Removing an RF31T/RF35/RF36 Disk Drive
4. Keep the mounting bracket and the four screws in a safe place because you
must use the same bracket and screws to install the replacement RF-series
drive.

3.9.2 Setting the DSSI ID
In a BA42B-based VAX 4000 system, each DSSI device must have a unique
DSSI ID number. When installing RF31T/RF35/RF36 disk drive options, the
DSSI ID must be set to an ID that is not used by any other DSSI device in the
system. (Refer to the VAX 4000 Models 100, 100A, 105A, 106A KA52/53/54
CPU System Maintenance manual for further information.)
To set the DSSI ID on RF31T/RF35/RF36 disk drive options, follow these steps:
1. Locate the DSSI ID jumper on the disk drive (see Figure 3–35).
Table 3–2 shows the DSSI ID jumper combinations.
Figure 3–35 Sample RF31T/RF35/RF36 Disk Drive Option with Mounting
Brackets

Busy LED
Pin 5 3 1
19

20
Fault LED

LJ-02126-TI0

3–50 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.9 Removing an RF31T/RF35/RF36 Disk Drive
Table 3–2 RF31T/RF35/RF36 DSSI ID Jumper Wire Combinations
DSSI ID

Pin 5

Pin 3

Pin 1

Out

2. Determine the DSSI ID number assigned to the RF31T/RF35/RF36 disk
drive option.
Note
When the system is in console mode, enter the SHOW DSSI command
to view the DSSI ID numbers for the existing devices in the system.

3. Position the jumper for the DSSI ID number selected. Table 3–2 lists the
DSSI ID numbers and the jumper wire combinations that correspond to
them.

Removing and Replacing Field Replaceable Units 3–51

Removing and Replacing Field Replaceable Units
3.10 Removing an RRD42 CDROM Drive

3.10 Removing an RRD42 CDROM Drive
Note
The illustrations in this section show how to remove and install the
RRD42 CDROM drive in the left-hand position of the lower drivemounting shelf, when viewed from the front. Installation in the
right-hand position requires the mounting bracket to be reversed on
the RRD42 CDROM drive. Note how the bracket is attached before
removing it from the drive.

To remove an RRD42 CDROM drive from the BA42B Enclosure, follow these
steps:
1. Remove the enclosure cover (refer to Section 3.1).
2. Remove the upper drive-mounting shelf (refer to Section 3.3).
Note

•

You can disconnect the cables from the drive more easily after
you remove the drive from the drive-mounting shelf.

•

When you disconnect the cables, you must note which cables
connect to which drives. On the SCSI cable, note the number
on the connector pull-tab.

3. Loosen the captive screw that secures the mounting bracket to the
drive-mounting shelf (refer to Figure 3–36).

3–52 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.10 Removing an RRD42 CDROM Drive
Figure 3–36 Removing the RRD42 CDROM Drive
Captive Screw

RRD42 CDROM Drive

RE_EN06241A_91

4. Lift the right side of the RRD42 CDROM drive. Slide the RRD42 CDROM
drive to the right until the tabs on the left side of the mounting bracket are
clear of the cutouts in the lower drive-mounting shelf.
5. Disconnect the power cable from the back of the RRD42 CDROM drive.
Figure 1–6 shows the power cables in the BA42B Enclosure.
6. Disconnect the SCSI cable from the back of the RRD42 CDROM drive by
pulling the pull-tab. Figure 1–7 shows the signal cables in the BA42B
Enclosure.
7. Lift the RRD42 CDROM drive, which has its bracket attached, out of the
system unit.
Caution
The RRD42 CDROM drive has a plastic cover that protects the drive
from dust. Do not remove this cover when replacing the RRD42
CDROM drive or setting the SCSI ID.

Removing and Replacing Field Replaceable Units 3–53

Removing and Replacing Field Replaceable Units
3.10 Removing an RRD42 CDROM Drive

3.10.1 Separating the RRD42 CDROM Drive from the Mounting Bracket
When you install a replacement RRD42 CDROM drive, you must use the
mounting bracket (74-42449-01) that is attached to the faulty RRD42 CDROM
drive (RRD42-AA). To separate the mounting bracket from the faulty RRD42
CDROM drive, follow these steps:
1. Note how the bracket is attached in relationship to the RRD42 CDROM
drive.
2. Remove the four screws (90-10961-03) that secure the mounting bracket to
the RRD42 CDROM drive (refer to Figure 3–37).
3. Separate the mounting bracket from the RRD42 CDROM drive.
Note
The following illustration shows how the mounting bracket is attached
when the RRD42 CDROM drive is mounted in the left-hand position.
If yours is mounted in the right-hand position, the bracket will be
reversed.

3–54 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.10 Removing an RRD42 CDROM Drive
Figure 3–37 Separating the Mounting Bracket from the RRD42 CDROM Drive

RRD42 CDROM Drive
RRD42 Mounting Bracket
Phillips Screws (4)
MLO-009939

Removing and Replacing Field Replaceable Units 3–55

Removing and Replacing Field Replaceable Units
3.10 Removing an RRD42 CDROM Drive
4. Keep the mounting bracket and the four screws in a safe place because you
must use the same bracket and screws to install the replacement RRD42
CDROM drive.
Note
When you attach the mounting bracket to the replacement RRD42
CDROM drive, align the holes on the mounting bracket that are not
marked by a Q with the screw holes on the sides of the RRD42 CDROM
drive.

3.10.2 Setting the SCSI ID on the Replacement RRD42 CDROM Drive
To set the SCSI ID on the replacement RRD42 CDROM drive, follow these
steps:
1. Note the SCSI ID jumper wires on the RRD42 CDROM drive you removed.
Figure 3–38 shows the location of the SCSI ID jumper wires.
2. Set the SCSI ID jumper wires on the replacement RRD42 CDROM drive
to the same positions as the SCSI ID jumper wires on the RRD42 CDROM
drive you removed.

3–56 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.10 Removing an RRD42 CDROM Drive
Figure 3–38 RRD42 SCSI ID Jumper Wire Locations

SCSI ID
Jumper Wires

Parity

2
Note: The SCSI ID shown is 4.
RE_EN06242A_91

Refer to the VAX 4000 BA42B Enclosure System Options manual for more
information about setting the SCSI ID of the RRD42 CDROM drive.

Removing and Replacing Field Replaceable Units 3–57

Removing and Replacing Field Replaceable Units
3.11 Removing an RRD43 CDROM Drive

3.11 Removing an RRD43 CDROM Drive
Note
The illustrations in this section show how to remove and install the
RRD43 CDROM drive in the left-hand position of the lower drivemounting shelf, when viewed from the front. Installation in the
right-hand position requires the mounting bracket to be reversed on
the RRD43 CDROM drive. Note how the bracket is attached before
removing it from the drive.

To remove an RRD43 CDROM drive from the BA42B Enclosure, follow these
steps:
1. Remove the enclosure cover (refer to Section 3.1).
2. Remove the upper drive-mounting shelf (refer to Section 3.3).
Note

•

You can disconnect the cables from the drive more easily after
you remove the drive from the drive-mounting shelf.

•

When you disconnect the cables, you must note which cables
connect to which drives. On the SCSI cable, note the number
on the connector pull-tab.

3. Loosen the captive screw that secures the mounting bracket to the
drive-mounting shelf (refer to Figure 3–39).

3–58 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.11 Removing an RRD43 CDROM Drive
Figure 3–39 Removing the RRD43 CDROM Drive

RRD43
Captive Screw
MLO-012260

4. Lift the right side of the RRD43 CDROM drive. Slide the RRD43 CDROM
drive to the right until the tabs on the left side of the mounting bracket are
clear of the cutouts in the lower drive-mounting shelf.
5. Disconnect the power cable from the back of the RRD43 CDROM drive.
Figure 1–6 shows the power cables in the BA42B Enclosure.
6. Disconnect the SCSI cable from the back of the RRD43 CDROM drive by
pulling the pull-tab. Figure 1–7 shows the signal cables in the BA42B
Enclosure.
7. Lift the RRD43 CDROM drive, which has its bracket attached, out of the
system unit.
Caution
The RRD43 CDROM drive has a plastic cover that protects the drive
from dust. Do not remove this cover when replacing the RRD43
CDROM drive or setting the SCSI ID.

Removing and Replacing Field Replaceable Units 3–59

Removing and Replacing Field Replaceable Units
3.11 Removing an RRD43 CDROM Drive

3.11.1 Separating the RRD43 CDROM Drive from the Mounting Bracket
When you install a replacement RRD43 CDROM drive, you must use the
mounting bracket (74-42449-01) that is attached to the faulty RRD43 CDROM
drive (RRD43-AA). To separate the mounting bracket from the faulty RRD43
CDROM drive, follow these steps:
1. Note how the bracket is attached in relationship to the RRD42 CDROM
drive.
2. Remove the four screws (90-10556-12) that secure the mounting bracket to
the RRD43 CDROM drive (refer to Figure 3–40).
3. Separate the mounting bracket from the RRD43 CDROM drive.
Note
The Figure 3–40 shows how the mounting bracket is attached when the
RRD43 CDROM drive is mounted in the left-hand position. If yours is
mounted in the right-hand position, the bracket will be reversed.

3–60 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.11 Removing an RRD43 CDROM Drive
Figure 3–40 Separating the Mounting Bracket from the RRD43 CDROM Drive

Power
Connector
SCSI ID
Jumper Wires

SCSI
Cable
Connector

SCSI ID

4 Parity

Note: The SCSI ID Shown is 1
MLO-012257

Removing and Replacing Field Replaceable Units 3–61

Removing and Replacing Field Replaceable Units
3.11 Removing an RRD43 CDROM Drive
4. Keep the mounting bracket and the four screws in a safe place because you
must use the same bracket and screws to install the replacement RRD43
CDROM drive.
Note
When you attach the mounting bracket to the replacement RRD43
CDROM drive, align the holes on the mounting bracket that are not
marked by a Q with the screw holes on the sides of the RRD43 CDROM
drive.

3.11.2 Setting the SCSI ID on the Replacement RRD43 CDROM Drive
To set the SCSI ID on the replacement RRD43 CDROM drive, follow these
steps:
1. Note the SCSI ID jumper wires on the RRD43 CDROM drive you removed.
Figure 3–40 shows the location of the SCSI ID jumper wires.
2. Set the SCSI ID jumper wires on the replacement RRD43 CDROM drive
to the same positions as the SCSI ID jumper wires on the RRD43 CDROM
drive you removed.
Refer to the VAX 4000 BA42B Enclosure System Options manual for more
information about setting the SCSI ID of the RRD43 CDROM drive.

3–62 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.12 Removing the Upper and Lower Drive-Mounting Shelf Combination

3.12 Removing the Upper and Lower Drive-Mounting Shelf
Combination
Caution
Static electricity can damage integrated circuits. Wear a wrist strap
and place an antistatic mat under the system when working with the
internal parts of the system.

To reach the CPU module and some of the components that connect to it, you
must remove the upper drive-mounting shelf and the lower drive-mounting
shelf. To save time, you can remove both of the drive-mounting shelves as
one unit with the devices and cables in place. To remove the upper and lower
drive-mounting shelf combination, follow these steps:
1. On the power supply, disconnect the power cables that supply power to the
upper and lower drive-mounting shelves.
2. Loosen the two captive screws that secure the upper drive-mounting shelf
to the power supply (refer to Figure 3–41).
3. Loosen the two captive screws that secure the lower drive-mounting shelf
to the enclosure (refer to Figure 3–41).
4. Loosen the two Phillips screws (90-09984-07) that secure the lower
drive-mounting shelf to the enclosure (refer to Figure 3–41).

Removing and Replacing Field Replaceable Units 3–63

Removing and Replacing Field Replaceable Units
3.12 Removing the Upper and Lower Drive-Mounting Shelf Combination
Figure 3–41 Removing the Upper and Lower Drive-Mounting Shelf
Combination
Captive
Screws (2)
Power
Supply
Unit

Captive
Screws (2)
Upper Drive
Mounting Shelf
Lower Drive
Mounting Shelf
Phillips Screws (2)
MLO-009942

5. Slide the upper and lower drive-mounting shelf combination toward the
front of the enclosure as far as it will go.
Caution
When you disconnect the SCSI cable from the CPU module, ensure that
you do not damage any of the MS44 or MS44L memory modules.

3–64 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.12 Removing the Upper and Lower Drive-Mounting Shelf Combination
6. Disconnect the SCSI cable from the CPU module (refer to Figure 3–42).
Figure 3–42 Disconnecting the SCSI Cable
SCSI Cable

MLO-009877

Removing and Replacing Field Replaceable Units 3–65

Removing and Replacing Field Replaceable Units
3.12 Removing the Upper and Lower Drive-Mounting Shelf Combination
7. Disconnect the DSSI cable from the CPU module (refer to Figure 3–43).
Figure 3–43 Disconnecting the DSSI Cable

CPU Module
MLO-009932

8. Lift the upper and lower drive-mounting shelf combination out of the
system enclosure with the devices and cables in place.

3–66 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.13 Removing the SCSI Cable from the Enclosure

3.13 Removing the SCSI Cable from the Enclosure
To remove the SCSI cable from the BA42B Enclosure, follow these steps:
1. Remove the upper and lower drive-mounting shelf combination (refer to
Section 3.12).
2. Disconnect the DSSI cable from the disk drives on the upper drivemounting shelf.
3. Loosen the captive screw that secures the upper drive-mounting shelf to
the lower drive-mounting shelf (refer to Figure 3–44).
4. Lift the left side of the upper drive-mounting shelf and slide it to the
left until the tabs on the right side of the upper drive-mounting shelf are
released from the cutouts in the lower drive-mounting shelf.
5. Disconnect the SCSI cable from the mass storage devices on the lower
drive-mounting shelf.

Removing and Replacing Field Replaceable Units 3–67

Removing and Replacing Field Replaceable Units
3.13 Removing the SCSI Cable from the Enclosure
Figure 3–44 Separating the Upper Drive-Mounting Shelf from the Lower
Drive-Mounting Shelf

Captive Screw

Upper Drive
Mounting Shelf

Lower Drive
Mounting Shelf

RE_EN06490A_91

3.14 Removing the DSSI Cable from the Enclosure
To remove the DSSI cable from the BA42B Enclosure, follow these steps:
1. Remove the upper and lower drive-mounting shelf combination (refer to
Section 3.12).
2. Disconnect the DSSI cable from the drives on the upper drive-mounting
shelf.
3. Loosen the captive screw that secures the upper drive-mounting shelf to
the lower drive-mounting shelf (refer to Figure 3–44).
4. Lift the left side of the upper drive-mounting shelf and slide it to the
left until the tabs on the right side of the upper drive-mounting shelf are
released from the cutouts in the lower drive-mounting shelf.
5. Disconnect the DSSI cable from the mass storage devices on the upper
drive-mounting shelf.

3–68 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.14 Removing the DSSI Cable from the Enclosure
6. Disconnect the DSSI cable from the DSSI daughter board (refer to
Figure 3–45).
Figure 3–45 Removing the DSSI Cable from the Daughter Board

CPU Module
MLO-009932

Note
If your system has a dual DSSI daughter board installed, it will be
necessary to remove the second DSSI cable as well.

Removing and Replacing Field Replaceable Units 3–69

Removing and Replacing Field Replaceable Units
3.15 Removing the DSSI Daughter Board

3.15 Removing the DSSI Daughter Board
Caution
Static electricity can damage integrated circuits. Wear a wrist strap
and place an antistatic mat under the system unit when working with
the internal parts of the system unit.

To remove the DSSI daughter board from the CPU module:
1. Remove the enclosure cover (refer to Section 3.1).
2. Remove the upper and lower drive-mounting shelf combination (refer to
Section 3.12).
3. Disconnect the DSSI cable from the DSSI daughter board as shown in
Figure 3–46 (if not already disconnected).
Note
If your system has a dual DSSI daughter board installed, it will be
necessary to remove the second DSSI cable as well. Both connectors
are shown in Figure 3–47.

4. Use a standoff tool as shown in Figure 3–47, or press the latch on one of
the standoff pillars and push up the corner of the DSSI daughter board
until it is released.
Note
The standoff pillars contain two components: a push-button rivet
(12-35477-02) and a standoff (12-35477-03).

3–70 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.15 Removing the DSSI Daughter Board
Figure 3–46 Removing the DSSI Daughter Board

CPU Module
MLO-009932

Removing and Replacing Field Replaceable Units 3–71

Removing and Replacing Field Replaceable Units
3.15 Removing the DSSI Daughter Board
Figure 3–47 Removing the DSSI Cable and Daughter Board

4
3

MLO-012066

! DSSI cable and connector
" Standoff tool
# Standoff pillar
$ CPU module DSSI connector
% DSSI daughter board
5. Use the standoff tool, or press the latch on the other standoff pillar and
push up that corner of the DSSI daughter board until it is released.
6. Push up the DSSI daughter board until the connectors on it are disengaged
from the connectors on the CPU module.
7. Lift up and remove the DSSI daughter board from the enclosure.

3–72 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.15 Removing the DSSI Daughter Board

3.15.1 Changing the DSSI ID
The DSSI ID can be changed by removing or replacing jumpers on the DSSI
daughter board. Figure 3–48 shows the three jumper locations (labeled 4 2 1
octal) on the board and contains a table illustrating the eight possible DSSI
IDs (0 to 7).
Note
If you are replacing the DSSI daughter board you should select the
same DSSI ID for the new replacement board.

1. Select an ID from 0 to 7.
2. See the table in Figure 3–48 to determine which jumpers are necessary to
make your selection.
3. Remove or insert the appropriate jumpers.
For example:
If the ID is to be 0, remove all three jumpers. If the ID is to be 7, leave all
three jumpers in.

Removing and Replacing Field Replaceable Units 3–73

Removing and Replacing Field Replaceable Units
3.15 Removing the DSSI Daughter Board
Figure 3–48 DSSI ID Jumper Locations

ID Select

Plastic Jumper (in)

DSSI ID Jumpers

ID SELECT Jumper Settings
ID
4
2
1
0

Out

In
MLO-009945

3–74 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.16 Removing the DSW42 Synchronous Communications Option

3.16 Removing the DSW42 Synchronous Communications
Option
The DSW42 synchronous communications option contains three components
that you must remove from the CPU module:
•

A logic board (54-20640-01)

•

An input/output cable (17-02942-01)

•

An input/output module (70-28542-01)

To remove the DSW42 synchronous communications option from the BA42B
Enclosure, follow these steps:
1. Remove the enclosure cover (refer to Section 3.1).
2. Remove the upper and lower drive-mounting shelf combination (refer to
Section 3.12).
3. Remove the logic board, the input/output cable, and the input/output
module according to the procedures in the following subsections.

3.16.1 Removing the DSW42 Logic Board
Caution
Static electricity can damage integrated circuits. Wear a wrist strap
and place an antistatic mat under the system unit when working with
the internal parts of the system unit.

1. Press the latch on one of the standoff pillars (refer to Figure 3–49) and
push up the corner of the DSW42 logic board until the DSW42 logic board
is released.
Note
The standoff pillars contain two components: a push-button rivet
(12-35477-02) and a standoff (12-35477-03).

Removing and Replacing Field Replaceable Units 3–75

Removing and Replacing Field Replaceable Units
3.16 Removing the DSW42 Synchronous Communications Option
Figure 3–49 Removing the DSW42 Logic Board
Standoff Pillars (2)

DSW42 Logic Board

CPU Module
MLO-009880

2. Press the latch on the other standoff pillar and push up that corner of the
DSW42 logic board until the DSW42 logic board is released.
3. Push up the DSW42 logic board until the connectors on the DSW42
logic board disengage from the connectors on the CPU module (refer to
Figure 3–49).
4. Remove the DSW42 logic board from the enclosure.

3.16.2 Removing the DSW42 Input/Output Cable
To remove the DSW42 input/output cable, follow these steps:
1. Disconnect the DSW42 input/output cable from the CPU module (refer to
Figure 3–50).
2. Disconnect the DSW42 input/output cable from the DSW42 input/output
module on the back of the enclosure (refer to Figure 3–50).

3–76 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.16 Removing the DSW42 Synchronous Communications Option
3. Remove the DSW42 input/output cable from the enclosure.
Figure 3–50 Removing the DSW42 Input/Output Cable
DSW42 Input/Output Module
DSW42 Input/Output Cable

CPU Module
MLO-009878

3.16.3 Removing the DSW42 Input/Output Module
To remove the DSW42 input/output module, follow these steps:
1. Disconnect the external cables that connect to synchronous ports 0 and 1
on the back of the system unit (if not already disconnected).
2. Disconnect the DSW42 input/output cable from the DSW42 input/output
module (if not already disconnected).
3. Press the spring clip on the DSW42 input/output module. Pull the DSW42
input/output module towards the front of the enclosure until it is released
from the back of the enclosure (refer to Figure 3–51).

Removing and Replacing Field Replaceable Units 3–77

Removing and Replacing Field Replaceable Units
3.16 Removing the DSW42 Synchronous Communications Option
4. Lift up and remove the DSW42 input/output module from the enclosure.
Figure 3–51 Removing the DSW42 Input/Output Module
Spring Clip
DSW42 Input/Output Module

CPU Module
MLO-009888

3–78 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.17 Removing the DHW42 Asynchronous Communications Option

3.17 Removing the DHW42 Asynchronous Communications
Option
The DHW42 asynchronous communications option contains three components
that you must remove from the system enclosure as follows:
•

A logic board (54-20662-01)

•

An input/output cable (17-02942-01)

•

One of the following input/output modules:
8 data-only line input/output module (70-28542-02)
16 data-only line input/output module (70-28542-03)
8 modem control line input/output module (70-28543-01)

To remove the DHW42 asynchronous communications option from the BA42B
Enclosure, follow these steps:
1. Remove the enclosure cover (refer to Section 3.1).
2. Remove the upper and lower drive-mounting shelf combination (refer to
Section 3.12).
3. Remove the logic board, the input/output cable, and the input/output
module according to the procedures in the following subsections.

3.17.1 Removing the DHW42 Logic Board
Caution
Static electricity can damage integrated circuits. Wear a wrist strap
and place an antistatic mat under the system unit when working with
the internal parts of the system unit.

1. Press the latch on one of the standoff pillars (refer to Figure 3–52) and
push up the corner of the DHW42 logic board until the DHW42 logic board
is released.

Removing and Replacing Field Replaceable Units 3–79

Removing and Replacing Field Replaceable Units
3.17 Removing the DHW42 Asynchronous Communications Option
Figure 3–52 Removing the DHW42 Logic Board
Standoff Pillars (2)

DHW42 Logic Board
CPU Module
MLO-009879

2. Press the latch on the other standoff pillar and push up the corner of the
DHW42 logic board until the latch releases the DHW42 logic board.
3. Push up the DHW42 logic board until the connectors on the DHW42
logic board disengage from the connectors on the CPU module (refer to
Figure 3–52).
4. Remove the DHW42 logic board from the enclosure.

3.17.2 Removing the DHW42 Input/Output Cable
To remove the DHW42 input/output cable, follow these steps:
1. Disconnect the DHW42 input/output cable from the CPU module (refer to
Figure 3–53).
2. Disconnect the DHW42 input/output cable from the DHW42 input/output
module on the back of the enclosure (refer to Figure 3–53).

3–80 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.17 Removing the DHW42 Asynchronous Communications Option
3. Remove the DHW42 input/output cable from the enclosure.
Figure 3–53 Removing the DHW42 Input/Output Cable
DSW42 Input/Output Module
DSW42 Input/Output Cable

CPU Module
MLO-009881

3.17.3 Removing the DHW42 Input/Output Module
To remove the DHW42 input/output module, follow these steps:
1. Disconnect the external cables that are connected to asynchronous ports A
and B on the back of the system unit (if not already disconnected).
2. Disconnect the DHW42 input/output cable from the DHW42 input/output
module (if not already disconnected).
3. Press the spring clip on the DHW42 input/output module. Pull the DHW42
input/output module towards the front of the enclosure until it is released
from the back of the enclosure (refer to Figure 3–54).

Removing and Replacing Field Replaceable Units 3–81

Removing and Replacing Field Replaceable Units
3.17 Removing the DHW42 Asynchronous Communications Option
4. Lift up and remove the DHW42 input/output module from the enclosure.
Figure 3–54 Removing the DHW42 Input/Output Module
Spring Clip
DSW42 Input/Output Module

CPU Module
MLO-009889

3–82 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.18 Removing the CPU Module

3.18 Removing the CPU Module
To remove the CPU module from the BA42B Enclosure, follow these steps:
1. Remove the ac power from the BA42B Enclosure.
2. Disconnect the external cables, loopback connectors, and terminators from
the back of the system unit.
3. Remove the enclosure cover (refer to Section 3.1).
4. Remove the upper and lower drive-mounting shelf combination (refer to
Section 3.12).
5. If installed, remove the DSW42 logic board (refer to Section 3.16.1) and
disconnect the DSW42 input/output cable from the CPU module (refer to
Section 3.16.2).
6. If installed, remove the DHW42 logic board (refer to Section 3.17.1) and
disconnect the DHW42 input/output cable from the CPU module (refer to
Section 3.17.2).
7. Disconnect the MS44 or MS44L memory modules from the CPU module
(refer to Section 3.2).
8. Disconnect the power cable from the CPU module (refer to Figure 3–55).

Removing and Replacing Field Replaceable Units 3–83

Removing and Replacing Field Replaceable Units
3.18 Removing the CPU Module
Figure 3–55 Disconnecting the Cables from the CPU Module

SCSI Ribbon Cable
Power Cable

CPU Module
MLO-009890

3–84 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.18 Removing the CPU Module
9. Disconnect the SCSI ribbon cable (17-02944-01) from the CPU module
(refer to Figure 3–55).
Caution
Ensure that you do not damage any of the CPU module components by
exerting too much force on the components.

10. Press the two spring clips (marked by arrows in Figure 3–56) that secure
the CPU module in position. The CPU module moves forward under the
tension of the connector gaskets. If necessary, slide the CPU module back
until it disengages from the ten keyhole cutouts (refer to Figure 3–56).
11. Use your finger, in the semicircular cutout on the front edge of the CPU
module, to lift up the front edge of the CPU module (refer to Figure 3–56).
12. While supporting the front of the CPU module with one hand, guide the
connectors on the back of the CPU module out of the corresponding cutouts
on the back of the enclosure.
13. Remove the CPU module from the enclosure.

Removing and Replacing Field Replaceable Units 3–85

Removing and Replacing Field Replaceable Units
3.18 Removing the CPU Module
Figure 3–56 Removing the CPU Module

PUSH

! Spring clips
" Semicircular cutout

# Keyhole cutouts (10)

3–86 Removing and Replacing Field Replaceable Units

MLO-012381

Removing and Replacing Field Replaceable Units
3.19 Replacing the CPU Module

3.19 Replacing the CPU Module
To install a replacement CPU module in a BA42B Enclosure, follow these
steps:
Caution
Static electricity can damage integrated circuits. Wear a wrist strap
and place an antistatic mat under the system when working with the
internal parts of the system.

1. Place the CPU module in the enclosure so that the connectors on the
CPU module align with the corresponding cutouts in the back panel of the
enclosure. Use the ThinWire Ethernet port as an anchor point to adjust
the position of the CPU module correctly.
2. Align the keyhole cutouts in the CPU module with the corresponding
standoff pillars in the base of the enclosure.
Caution
Ensure that you do not damage any of the CPU module components by
exerting pressure on the components.

3. Press the CPU module at the two positions marked push. The spring clips
push the standoff pillars into the keyhole cutouts that secure the CPU
module in position.
4. Connect the DSSI cable to the CPU module.
5. Connect the SCSI cable (17-02944-01) to the CPU module (refer to
Figure 3–55 for the location of the SCSI cable).
6. Connect the power cable to the CPU module (refer to Figure 3–55 for the
location of the power cable).
7. Install the MS44 and MS44L memory modules that you removed from the
original CPU module. Follow the steps in Section 3.2 in reverse order to
install the memory modules.
8. Install the DSW42 logic board, and connect the DSW42 input/output cable
if fitted. Follow the steps in Section 3.16.1 and Section 3.16.2 in reverse
order to install the logic board and cable.

Removing and Replacing Field Replaceable Units 3–87

Removing and Replacing Field Replaceable Units
3.19 Replacing the CPU Module
9. Install the DHW42 logic board, and connect the DHW42 input/output cable
if fitted. Follow the steps in Section 3.17.1 and Section 3.17.2 in reverse
order to install the logic board and cable.
10. Install the upper and lower drive-mounting shelf combination. Follow the
steps in Section 3.12 in reverse order to install the drive-mounting shelf
combination.
11. Install the enclosure cover. Follow the steps in Section 3.1 in reverse order
to install the cover.

3.20 Removing the Power Supply
Note
In VAX 4000 systems, the power supply (30-35042-01) is a single FRU.
It does not have any replaceable components.

To remove the power supply from the BA42B Enclosure, follow these steps:
1. Remove the ac power.
2. Remove the enclosure cover (refer to Section 3.1).
3. Remove the upper and lower drive-mounting shelf combination (refer to
Section 3.12).
4. Disconnect the power cable from the CPU module (refer to Figure 3–55).
5. Loosen the two captive screws (refer to Figure 3–57).

3–88 Removing and Replacing Field Replaceable Units

Removing and Replacing Field Replaceable Units
3.20 Removing the Power Supply
Figure 3–57 Removing the Power Supply
Power Supply Unit
Captive Screws (2)

Phillips Screws (2)
MLO-009940

6. Loosen the two Phillips screws (90-09984-07) that secure the power supply
to the left side of the enclosure (refer to Figure 3–57).
Caution
Ensure that you do not damage any of the MS44 or MS44L memory
modules when you lift the power supply out of the enclosure.

7. Lift the front of the power supply (refer to Figure 3–57).
8. Remove the power supply from the enclosure.

Removing and Replacing Field Replaceable Units 3–89

A
Pin Specifications for the Ports on the
BA42B System
Figure A–1 shows the pin specifications for the ports on the BA42B system.

Pin Specifications for the Ports on the BA42B System A–1

Pin Specifications for the Ports on the BA42B System

Figure A–1 Pin Specifications for the Ports on the BA42B System

100 V ac to 120 V ac
or
220 V ac to 240 V ac
at 50 Hz or 60 Hz

Power
Supply

1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
2
3
1
2
3
4
1
2
3
4

+5 V dc (pullup)
Tx Data +
Tx Data Rx Data +
Rx Data 3 kohm to ground

-12 V dc (Blue)
1
Ground (Black)
2
Ground (Black)
3
Ground (Black)
4
+5.1 V dc (Red)
5
+5.1 V dc (Red)
6
+3.5 V dc to 5.25 V dc (Brown)
7
+5.1 V dc (Red)
8
+12.1 V dc (Orange)
9
+5.1 V dc (Red)
10
Ground (Black)
11
Ground (Black)
12
-9 V dc (Yellow)
13
-9 V dc Return (White)
14

CPU
Module

+3.3 V dc
Ground Connection
+3.3 V dc Return
+12.1 V dc (Orange)
Ground (Black)
Ground (Black)
+5.1 V dc (Red)

+5 V dc (pullup)
Tx Data +
Tx Data Rx Data +
Rx Data 3 kohm to ground
Chassis Gnd (Opt)
TX
Rx
RTS
CTS
DSR
Signal Ground
CD
SPD
LLKB
DTR
RI
DSRS
TMI

+12.1 V dc (Orange)
Ground (Black)
Ground (Black)
+5.1 V dc (Red)

To and from
Internal
SCSI Devices

MMJ
Port 0

1
2
3
4
5
6

MMj
Port 1

1
2
3
4
5
6

MMJ
Port 3

1
2
3
4
5
6
7
8
12
18
20
22
23
25

Asynchronous
Modem Control
Port 2

Chassis Ground
1
Collision +
2
Transmit +
3
Receive +
5
+12 V dc Return
6
Collision 9
Transmit 10
Receive 12
+12 V dc, fuse protected
13

To and from
External
SCSI Devices
(See Table A-4)

To and from
DSSI Devices

NOTE: Asynchronous Option I/O
(See Table A-1 for 8-data or 16-data only option.
See Table A-2 for 8-modem control option)

+5 V dc (pullup)
Tx Data +
Tx Data Rx Data +
Rx Data 3 kohm to ground

1
2
3
4
5
6

Asynchronous
Communications
Option

Synchronous
Communications
Option

Standard
Ethernet
Port

ThinWire
Ethernet Port
(Coaxial)
Q-Bus

Synchronous Option I/O
(See Table A-3)
Asynchronous Option I/O

Synchronous Option I/O
MLO-009944

A–2 Pin Specifications for the Ports on the BA42B System

Pin Specifications for the Ports on the BA42B System

Table A–1 Asynchronous Port A and Port B Pin Specifications for the EightData and 16-Data Line Options
Port B 1

Port A
2

Signal Name 2

Contact

Signal Name

LINE 0 TRANSMIT H

LINE 0 RECEIVE H

LINE 8 RECEIVE H

LINE 1 TRANSMIT H

LINE 9 TRANSMIT H

LINE 1 RECEIVE H

LINE 9 RECEIVE H

LINE 2 TRANSMIT H

LINE 10 TRANSMIT H

LINE 2 RECEIVE H

LINE 10 RECEIVE H

LINE 3 TRANSMIT H

LINE 11 TRANSMIT H

LINE 3 RECEIVE H

LINE 11 RECEIVE H

LINE 4 TRANSMIT H

LINE 12 TRANSMIT H

LINE 4 RECEIVE H

LINE 12 RECEIVE H

LINE 5 TRANSMIT H

LINE 13 TRANSMIT H

LINE 5 RECEIVE H

LINE 13 RECEIVE H

LINE 6 TRANSMIT H

LINE 14 TRANSMIT H

LINE 6 RECEIVE H

LINE 14 RECEIVE H

LINE 7 TRANSMIT H

LINE 15 TRANSMIT H

LINE 7 RECEIVE H

LINE 15 RECEIVE H

150 OHMS TO GROUND

LINE 0 TRANSMIT L

LINE 8 TRANSMIT L

LINE 0 RECEIVE L

LINE 8 RECEIVE L

LINE 1 TRANSMIT L

LINE 9 TRANSMIT L

LINE 1 RECEIVE L

LINE 9 RECEIVE L

LINE 2 TRANSMIT L

LINE 10 TRANSMIT L

LINE 2 RECEIVE L

LINE 10 RECEIVE L

LINE 3 TRANSMIT L

LINE 11 TRANSMIT L

LINE 3 RECEIVE L

LINE 11 RECEIVE L

LINE 8 TRANSMIT H

1 Not applicable to eight-data line option.
2 The signal names ending with L are active low; the signal names ending with H are active high.

(continued on next page)

Pin Specifications for the Ports on the BA42B System A–3

Pin Specifications for the Ports on the BA42B System

Table A–1 (Cont.) Asynchronous Port A and Port B Pin Specifications for the
Eight-Data and 16-Data Line Options
Port B 1

Port A
2

Signal Name 2

Contact

Signal Name

LINE 4 TRANSMIT L

LINE 12 TRANSMIT L

LINE 4 RECEIVE L

LINE 12 RECEIVE L

LINE 5 TRANSMIT L

LINE 13 TRANSMIT L

LINE 5 RECEIVE L

LINE 13 RECEIVE L

LINE 6 TRANSMIT L

LINE 14 TRANSMIT L

LINE 6 RECEIVE L

LINE 14 RECEIVE L

LINE 7 TRANSMIT L

LINE 15 TRANSMIT L

LINE 7 RECEIVE L

LINE 15 RECEIVE L

150 OHMS TO GROUND

1 Not applicable to eight-data line option.
2 The signal names ending with L are active low; the signal names ending with H are active high.

Table A–2 Asynchronous Port A and Port B Pin Specifications for the EightModem Control Line Option
Port A

Port B

Contact

Signal Name 1

LINE 0 TX CONN L

LINE 4 TX CONN L

LINE 0 RX CONN L

LINE 4 RX CONN L

LINE RTS CONN<0> H

LINE RTS CONN<4> H

LINE 0 CTS CONN H

LINE 4 CTS CONN H

LINE 0 DSR CONN H

LINE 4 DSR CONN H

LINE 0 SGND CONN L

LINE 4 SGND CONN L

LINE 0 CD CONN H

LINE 4 CD CONN H

LINE 0 SPDMI CONN H

LINE 4 SPDMI CONN H

LINE DTR CONN<0> H

LINE DTR CONN<4> H

1 The signal names ending with L are active low; the signal names ending with H are active high.

(continued on next page)

A–4 Pin Specifications for the Ports on the BA42B System

Pin Specifications for the Ports on the BA42B System

Table A–2 (Cont.) Asynchronous Port A and Port B Pin Specifications for the
Eight-Modem Control Line Option
Port A

Port B

Contact

Signal Name 1

LINE 0 RI CONN H

LINE 4 RI CONN H

—

LINE DSRS CONN<0> H

LINE DSRS CONN<4> H

LINE 1 TX CONN L

LINE 5 TX CONN L

LINE 1 RX CONN L

LINE 5 RX CONN L

LINE RTS CONN<1> H

LINE RTS CONN<5> H

LINE 1 CTS CONN H

LINE 5 CTS CONN H

LINE 1 DSR CONN H

LINE 5 DSR CONN H

LINE 1 SGND CONN L

LINE 5 SGND CONN L

LINE 1 CD CONN H

LINE 5 CD CONN H

LINE 1 SPDMI CONN H

LINE 5 SPDMI CONN H

LINE DTR CONN<1> H

LINE DTR CONN<5> H

LINE 1 RI CONN H

LINE 5 RI CONN H

—

LINE DSRS CONN<1> H

LINE DSRS CONN<5> H

LINE 2 TX CONN L

LINE 6 TX CONN L

LINE 2 RX CONN L

LINE 6 RX CONN L

LINE RTS CONN<2> H

LINE RTS CONN<6> H

LINE 2 CTS CONN H

LINE 6 CTS CONN H

LINE 2 DSR CONN H

LINE 6 DSR CONN H

LINE 2 SGND CONN L

LINE 6 SGND CONN L

LINE 2 CD CONN H

LINE 6 CD CONN H

LINE 2 SPDMI CONN H

LINE 6 SPDMI CONN H

LINE DTR CONN<2> H

LINE DTR CONN<6> H

LINE 2 RI CONN H

LINE 6 RI CONN H

—

LINE DSRS CONN<2> H

LINE DSRS CONN<6> H

1 The signal names ending with L are active low; the signal names ending with H are active high.

(continued on next page)

Pin Specifications for the Ports on the BA42B System A–5

Pin Specifications for the Ports on the BA42B System

Table A–2 (Cont.) Asynchronous Port A and Port B Pin Specifications for the
Eight-Modem Control Line Option
Port A

Port B

Contact

Signal Name 1

LINE 3 TX CONN L

LINE 7 TX CONN L

LINE 3 RX CONN L

LINE 7 RX CONN L

LINE RTS CONN<3> H

LINE RTS CONN <7> H

LINE 3 CTS CONN H

LINE 7 CTS CONN H

LINE 3 DSR CONN H

LINE 7 DSR CONN H

LINE 3 SGND CONN L

LINE 7 SGND CONN L

LINE 3 CD CONN H

LINE 7 CD CONN H

LINE 3 SPDMI CONN H

LINE 7 SPDMI CONN H

LINE DTR CONN<3> H

LINE DTR CONN<7> H

LINE 3 RI CONN H

LINE 7 RI CONN H

—

LINE DSRS CONN<3> H

LINE DSRS CONN<7> H

—

1 The signal names ending with L are active low; the signal names ending with H are active high.

Table A–3 Pin Specifications for Synchronous Port 0 and Port 1
Port 0

Port 1

Contact

Signal Name 1

CODE GND 1 L

CODE GND 2 L

CODE0 1 L

CODE0 2 L

CODE1 1 L

CODE1 2 L

CODE2 1 L

CODE2 2 L

CODE3 1 L

CODE3 2 L

TXDATA(B) 1 P L

TXDATA(B) 2 P L

1 The signal names ending with L are active low; the signal names ending with H are active high.

(continued on next page)

A–6 Pin Specifications for the Ports on the BA42B System

Pin Specifications for the Ports on the BA42B System

Table A–3 (Cont.) Pin Specifications for Synchronous Port 0 and Port 1
Port 0

Port 1

Contact

Signal Name 1

TXDATA(A) 1 P H

TXDATA(A) 2 P H

TXDATA 1 P L

TXDATA 2 P L

RTS/C A 1 P L

RTS/C A 2 P L

RTS/C B 1 P L

RTS/C B 2 P L

RX DATA A 1 P L

RX DATA A 2 P L

RX DATA B 1 P L

RX DATA B 2 P L

LOCAL LOOP 1 P H

LOCAL LOOP 2 P H

TEST 4 1 P L

TEST 4 2 P L

TEST 11 1 P H

TEST 11 2 P H

REM LOOP 1 P H

REM LOOP 2 P H

R1 1 P H

R1 2 P H

RXCLOCK A 1 P L

RXCLOCK A 2 P L

RXCLOCK B 1 P H

RXCLOCK B 2 P H

TXCLOCK A 1 P L

TXCLOCK A 2 P L

TXCLOCK B 1 P H

TXCLOCK B 2 P H

CLOCK 1 P L

CLOCK 2 P L

V35 TXCLK A 1 P L

V35 TXCLK A 2 P L

V35 TXCLK B 1 P H

V35 TXCLK B 2 P H

V35 CLK A 1 P L

V35 CLK A 2 P L

V35 CLK B 1 P H

V35 CLK B 2 P H

V35 RX A 1 P L

V35 RX A 2 P L

V35 RX B 1 P H

V35 RX B 2 P H

V35 TX A 1 P L

V35 TX A 2 P L

V35 TX B 1 P H

V35 TX B 2 P H

V35 RXCLK A 1 P L

V35 RXCLK A 2 P L

V35 RXCLK B 1 P H

V35 RXCLK B 2 P H

DTR 1 P H

DTR 2 P H

1 The signal names ending with L are active low; the signal names ending with H are active high.

(continued on next page)

Pin Specifications for the Ports on the BA42B System A–7

Pin Specifications for the Ports on the BA42B System

Table A–3 (Cont.) Pin Specifications for Synchronous Port 0 and Port 1
Port 0

Port 1

Contact

Signal Name 1

DSR A 1 P H

DSR A 2 P H

DSR B 1 P L

DSR B 2 P L

RTS 1 P L

RTS 2 P L

DCD/I A 1 P H

DCD/I A 2 P H

DCD/I B 1 P L

DCD/I B 2 P L

CTS A 1 P H

CTS A 2 P H

CTS B 1 P L

CTS B 2 P L

TEST 1 1 P H

TEST 1 2 P H

TEST 2 1 P H

TEST 2 2 P H

DTE GND 1 PROT L

DTE GND 2 PROT L

DTR A 1 P H

DTR A 2 P H

DTR B 1 P L

DTR B 2 P L

CLOCK A 1 P L

CLOCK A 2 P L

CLOCK B 1 P H

CLOCK B 2 P H

TEST 3 1 P H

TEST 3 2 P H

SPEED SEL 1 P H

SPEED SEL 2 P H

1 The signal names ending with L are active low; the signal names ending with H are active high.

A–8 Pin Specifications for the Ports on the BA42B System

Pin Specifications for the Ports on the BA42B System

Table A–4 Pin Specifications for the External SCSI Connector
Contact

Signal Name 1

Contact

Signal Name 1

GROUND

TERMPWR

DB (0) L

RESERVED

GROUND

RESERVED

DB (1) L

GROUND

DB (2) L

GROUND

ATN L

DB (3) L

GROUND

DB (4) L

GROUND

BSY L

DB (5) L

GROUND

ACK L

DB (6) L

GROUND

RST L

DB (7) L

GROUND

MSG L

DB (P) L

GROUND

SEL L

GROUND

C/D L

GROUND

RESERVED

REQ L

RESERVED

GROUND

OPEN

I/O L

1 The signal names ending with L are active low; the signal names ending with H are active high.

Pin Specifications for the Ports on the BA42B System A–9

B
Related Documentation
The following documents contain information relating to the VAX 4000 Model
100 system.
Document Title

Order Number

VAX 4000 Model 100 Customer Letter

EK–463AA–CL

VAX 4000 Model 100 Customer Technical Information

EK–476AA–TI

VAX 4000 Model 100 Installation Information

EK–465AA–IN

VAX 4000 Model 100 Operator Information

EK–466AA–OP

VAX 4000 Model 100 Troubleshooting and Diagnostics
Information

EK–4688AA–TS

VAX 4000 BA42B-Based Systems DSSI Upgrade Manual

EK–500AA–UP

The following documents contain information relating to the VAX 4000 Model
100A system.
Document Title

Order Number

VAX 4000 Model 100A Customer Letter

EK–501AA-CL

VAX 4000 Model 100A Customer Technical Information

EK–504AA–TI

VAX 4000 Model 100A Installation Information

EK-502AA-IN

VAX 4000 Model 100A Operator Information

EK–503AA-OP

VAX 4000 Model 100A Troubleshooting and Diagnostics
Information

EK–505AA–TS

VAX 4000 BA42B-Based Systems DSSI Upgrade Manual

EK–500AA–UP

The following documents contain information relating to the VAX 4000 Model
105A/106A system.