DEC VAXmate User manual

EK-P500B-SV-002
Service Guide

TM
mate
Service Guide

~eptember 1986 May 1987
© Digital Equipment Corporation 1987. All Rights Reserved.
The information
in this document is subject to change without notice
and should not be construed as a commitment by Digital Equipment
Corporation. Digital Equipment Corporation assumes no responsibility
for any errors that may appear in this document.
The software described in this document is furnished under a license
and may only be used or copied in accordance with the terms of such
license.
No responsibility is assumed for the use or reliability of software on
equipment that is not supplied by DIGITAL or its affiliated companies.
MS-DOS is a trademark of Microsoft Corporation.
The following are trademarks
of Digital Equipment Corporation:
!amaamo'"
DIBOL
RSX
DEC
MASSBUS
UNIBUS
DEC mate PDP
VAX
DECsystem-IO
P/OS
VMS
DECSYSTEM-20
Professional
VT
DECUS Rainbow
Work Processor
DECwriter
RSTS
Printed in U.S.A.

Contents
Chapter 1 Overview
1.1 Introduction ......................................................................................... 1-1
1.2 VAXmate Workstation Components ........................................................ 1-3
1.2.1 Monitor
(Amber or Green Screen) .................................................. 1-6
1.2.2 I/O Board ...................................................................................... 1-6
1
.2.2.1 Communications Port .............................................................. 1-6
1.2.2.2 Printer Port ............................................................................ 1-6
1.2.3 CPU Board ..................................................................................... 1-8
1.2.4 Power Supply ................................................................................ 1-8
1.
2.5 RX33 1.2 Mbyte Diskette Drive ..................................................... 1-8
1.2.6 Keyboard ....................................................................................... 1-9
1.2.7 Mouse ........................................................................................... 1-9
1.2.8 ThinWire Ethernet Cable ............................................................... 1-9
1.2.9 Options ......................................................................................... 1-9
1.2.9.1 2 Mbyte Memory ................................................................... 1-10
1.2.9.2 80287 Coprocessor .............................................................. 1-10
1.2.9.3 Expansion Box ...................................................................... 1-10
l. 2.9.4 Integral Modem Board for North America .............................. 1-10
1.2.9.5 LA75 Printer ........................................................................ 1-10
1.2.9.6 LN03 Plus Printer ................................................................. 1-11
1.2.10 DIGITAL ThinWire Ethernet Multiport Repeater (DEMPR) .......... 1-11
1.2.11 DIGITAL ThinWire Ethernet Station Adapter (DESTA) ................. 1-11
1.3
Environmental and Electrical Description ............................................ 1-11
Chapter 2 Troubleshooting the VAXmate Workstation
2.1 Introduction ......................................................................................... 2-1
2.1.1 Diagnostic Tests ............................................................................. 2-1
2.1.1.1 Power-Up Test ........................................................................ 2-1
iii

11111
Contents
2.1.1.2 Extended Self-Test ..................................................................2-2
2.1.1.3 Service Diagnostics .................................................................2-3
2.1.2 Light Emitting Diodes (LEOs) ........................................................2-3
2.2 Troubleshooting Procedure ...................................................................2-5
2.3 Power-Up Test ......................................................................................2-6
2.3.1 System Halt .................................................................................2-15
2.3.2 CPU Board]umpers .....................................................................2-15
2.3.3 Error Numbers.............................................................................2-16
2.3.4 What To Do If the VAXmate Power Shuts Down............................ 2-18
2.3.4.1 Thermal Shutdown/Overvoltage ............................................2-19
2.3.4.2 Overcurrent Shutdown..........................................................2-19
2.3.4.3 Blown Fuse or Short Circuit ..................................................2-20
2.4 Extended Self-Test ..............................................................................2-22
2.4.1 Exceptions to Testing Results.......................................................2-26
2.4.1.1
If the Customer Reports a Modem Problem............................ 2-26
2.4.1.2 New Expansion Box .............................................................. 2-26
2.4.1.3 New Hard Disk in Expansion Box..........................................2-27
2.4.1.4
LA 75 Printing Erroneous Characters......................................2- 27
2.5 Service Diagnostics .............................................................,............... 2-27
2.5.1 System Errors Versus Diagnostic Errors ......................................... 2-28
2.5.2 Previously Detected Error ............................................................ 2-28
2.5.3 Main Diagnostic Menu .................................................................2-29
2.5.4 Selecting a Mode from Main Diagnostic Menu...............................2-33
2.5.5 System Test Mode ........................................................................2-33
2.5.5.1 Test
Option Menu .................................................................2-34
2.5.5.2 System Test Requirements ..................................................... 2-37
2.5.5.3 System Test Execution...........................................................2-42
2.5.6 Individual Tests.......................................................................·.....2-44
2.5.7 New Diagnostic Installation ......................................................... 2-47
2.5.8 ~rror Log Mode............................................................................ 2-48
Chapter 3 ThinWire Ethernet
3.1 Introduction .........................................................................................3-1
3.2 ThinWire Network Hardware Components .............................................3-1
3.2.1 ThinWire Network Terms...............................................................3-3
3.3 ThinWire Network Troubleshooting.......................................................3-6
3.4 Installation Guidelines..........................................................................3-7
3.5 Installation Procedures .........................................................................3-9
3.5.1 ThinWire Network and VAXmate Server .........................................3-9
3.5.2 ThinWire Network with MicroVAX II Computer Server .................3-11
iv

Contents IIIII
3.5.3 Adding a Workstation to End of ThinWire Segment ....................... 3-13
3.5.4 Adding a VAXmate Workstation to Middle of an Existing
Segment ......................................................................................3-14
3.6 ThinWire Local Area Network (LAN) Example .................................... 3-15
3.7 ThinWire Network Map and Worksheet ............................................... 3-16
Chapter 4 Monitor Adjustments
4.1 Introduction .........................................................................................4-1
4.2 Brightness and Contrast Adjustment.......................................................4-2
4.3 Internal Monitor Adjustments ................................................................4-3
4.3.1 Horizontal Hold.............................................................................4-5
4.3.2 Cutoff............................................................................................4-6
4.3.3 Width Coil ....................................................................................4-7
4.3.4 Height - 400 Line Mode ................................................................4-8
4.3.5 Centering Rings .............................................................................4-9
4.3.6 Rotation.......................................................................................4-11
4.3.7 Video Compensation .................................................................... 4-12
4.3.8 Height - 250 Line Mode..............................................................4-13
4.3.9 Focus .......................................................................................... 4-13
Chapter 5 FRU Replacement
5.1 Introduction .........................................................................................5-1
5.2 Before
You Replace Any FRUs ...............................................................5-3
5.3 Replacing
FRUs .....................................................................................5-4
5.3.1 Turning
Off Power and Unplugging External Cables.......................5-4
5.3.2 Separating the Expansion Box from the System Unit .......................5-5
5.3.3 Fuse Replacement ..........................................................................5-6
5.3.4 Opening the System Unit Back Door ..............................................5-7
5.3.5 System Unit Back Door Removal.....................................................5-8
5.3.6 System Unit Cover Removal..........................................................5-11
5.3.7 2 Mbyte Memory Replacement......................................................5-13
5.3.8 Modem Board Replacement ..........................................................5-14
5.3.9 Math Coprocessor (80287) Replacement..................................... .5-16
5.3.10 Speaker Replacement ................................................................. 5-18
5.3.11 Monitor Board RemovaL ............................................................ 5-20
5.3.12 CRT Handling Precautions .........................................................5-25
5.3.13 CRT Assembly Removal ..............................................................5- 26
5.3.14 CRT Assembly Installation..........................................................5-31
5.3.15 Diskette Drive Removal..............................................................5-33
5.3 . 16 Diskette Drive Installation .........................................................5-36
v

11111 Contents
5.3.17 CPU Board Removal .................................................................. .5-37
5.3.18 CPU Board Installation ............................................................... 5-42
5.3.19 Power LED Removal ................................................................... 5-44
5.3.20 Power LED Installation ............................................................... 5-45
5.3.21 IjO-Video Board Removal .......................................................... 5-46
5.3.22 IjO-Video Board Installation ..................................................... .5-49
5.3.23 Power Supply Board Replacement .............................................. .5-50
5.3.24 Expansion Box Cover Removal .................................................. .5-50
5.3.25 Hard Disk Drive Removal ........................................................... 5-52
5.3.26 Hard Disk Drive Removal with Fan Present.. ............................... 5-54
5.3.27 Hard Disk Drive BAse Plate Removal.. ........................................ .5.56
5.3.28 ReadjWrite Board Removal from the Hard Disk .......................... 5-57
5.3.29 ReadjWrite Board Installation ................................................... .5-59
5.3.30 Removing Skid Plate from New Hard Disk .................................. 5-61
5.3.31 Hard Disk Drive Installation ....................................................... 5-62
5.3.32 Gaining Access to the Expansion Box Card Cage ....................... .5-64
5.3.33 Hard Disk Controller Replacement ............................................. 5-65
5.3.34 Option Replacement in the Expansion Box ................................ .5-66
5.3.35 Option Backplane Replacement .................................................. 5-67
5.3.36 Expansion Box Fan Replacement ................................................ 5-68
5.3.37 Expansion Box Power Connector and Bridge Replacement........... 5-70
5.3.38 Expansion Box Power Regulator Replacement ............................ .5-72
Appendix A Part Numbers ...........................................................A-1
Appendix B Test Descriptions ..................................................... B-1
B.l Introduction ......................................................................................... B-1
Appendix C Error Numbers ........................................................ C-1
Tables
Table 1-1
Table 1-2
Table 2-1
Table 2-2
Table 4-1
Table 5-1
vi
Electrical Description .............................................................. 1-12
Expansion Box
Power Consumption (Maximum) ......................1-13
LED Function ............................................................................. 2-5
Symptoms ................................................................................ 2-11
Adjustments, Patterns,
and Control Locations .............................. .4-3
FRUs and Removal/Replacement Procedures Paragraph
Numbers .................................................................................... 5-2

Contents 11111
Table A-I
Table
A-2
Table A-3
Table A-4
Table A-5
Table C-1
Table C-2
Table C-3
Table C-4
VAXmate Workstation
Recommended Spares ................................ A-2
Printer Components ................................................................... A-4
Base System ............................................................................... A-4
Networking Components ............................................................ A-5
Country Specific Components ..................................................... A-6
ROM Diagnostics Error Numbers ............................................... C-1
Service Diagnostics Error Numbers ............................................ C-4
Install New Diagnostics Error Messages ................................... C- 21
System Error Messages ............................................................. C-22
Figures
Figure 1-1 VAXmate Workstation ............................................................... 1-2
Figure 1-2 VAXmate Workstation Block Diagram
........................................ 1-5
Figure 1-3 I/O-Video Baord Block Diagram
................................................ 1-7
Figure 2-1 LED Locations .......................................................................... 2-4
Figure 2-2
ROM Diagnostic Test Sequence (Sheet 1 of 3) .......................... 2-7
Figure 2-2
ROM Diagnostic Test Sequence (Sheet 2 of 3) .......................... 2-8
Figure 2-2 ROM Diagnostic Test Sequence (Sheet 3 of 3) .......................... 2-9
Figure 2-3 CPU BoardJumpers ................................................................ 2-16
Figure 2-4 Inserting the Diskette ............................................................. 2-23
Figure 2-5 Extended Self-Test Keys .......................................................... 2-23
Figure 2-6 Sample Configuration Display ................................................. 2-24
Figure 2-7 Restarting Service Diagnostics ................................................. 2-28
Figure 2-8 ROM Diagnostic Error ............................................................. 2-29
Figure 2-9 Main Diagnostic Menu ............................................................ 2-30
Figure 2-10 Service Diagnostics Mode Selection Keys ............................... 2-33
Figure 2-11 Test Option Menu ................................................................. 2-34
Figure 2-12 Prompt on Error ................................................................... 2-35
Figure
2-13 Loop on Error ....................................................................... 2-36
Figure 2-14 System Test Requirements ..................................................... 2-37
Figure 2-15 Assembling the Network Port Loopback Connector ................ 2-38
Figure 2-16 Disconnecting from the Network .......................................... 2-39
Figure 2-17 Disconnecting Mouse, Printer, and
Figure 2-18
Figure 2-19
Figure 2-20
Figure 2-21
Figure
2-22
Communications Cables ........................................................ 2-40
Installing Loopback Connectors ............................................ 2-41
System Test Execution .......................................................... 2-43
Individual Test Menu ............................................................ 2-45
Individual Test Execution ..................................................... 2-46
Sample Error Log .................................................................. 2-49
vii

IIIII Contents
Figure 3-1
Figure 3-2
Figure 3-3
Figure 3-4
Figure 3-5
Figure 3-6
Figure 3-7
Figure 3-8
Cable
Components ................................................................... 3-2
Two Sample ThinWire Networks ............................................... 3-2
DIGITAL Faceplate
.................................................................... 3-5
Correct and Incorrect ThinWire Segment Installation ................ 3-8
ThinWire Network with a VAXmate Server.............................. 3-10
ThinWire Network with MicroVAX II Server ............................ 3-11
Adding a VAXmate Workstation to End of Existing Segment ..... 3-13
Adding a VAXmate Workstation to Middle of an Existing
Segment ............................................................................... 3-14
Figure 3-9 Sample ThinWire LAN ............................................................ 3-15
Figure 4-1 Brightness and Contrast Controls .............................................. 4-2
Figure 4-2 Monitor Board Controls
............................................................. 4-4
Figure 4-3 Horizontal Hold ...................................................................... .4-5
Figure 4-4
Cutoff Adjustment ................................................................... .4-6
Figure 4-5
Width Measurement ................................................................. .4-7
Figure 4-6 Height Measurement ................................................................ .4-8
Figure 4-7
Centering Measurement ........................................................... .4-9
Figure 4-8 Yoke
Centering Rings ............................................................ .4-10
Figure 4-9 Rotation Measurement ........................................................... .4-11
Figure 5
-1 Cable Locations ........................................................................ 5-4
Figure 5-2 Separating
the Expansion Box from the System Unit ..................5-5
Figure 5-3 Fuse Location
.......................................................................... .5-6
Figure 5
-4 Opening the Back Door ............................................................ 5-7
Figure 5-5 Removing the Back Door Screws ............................................... 5-8
Figure 5-6 Swinging
the Door Up ............................................................. .5-9
Figure 5-7 Releasing the Links to Remove the Door ................................. 5-10
Figure 5-8 Removing the Cover ............................................................... 5-11
Figure 5-9 Board Locations
..................................................................... .5-12
Figure 5-10 Removing the 2 Mbyte Memory Board ................................... 5-13
Figure 5-11 Removing the Modem Board ................................................. 5-14
Figure 5-12 Modem Board]umper Locations ............................................ 5-15
Figure 5-13 Installing the 80287 Coprocessor.. ...................................... .5-16
Figure 5-14 Special Option Installed Label.. ........................................... .5-17
Figure 5-15 Removing the Speaker ......................................................... .5-19
Figure 5-16 Webbed Shield .................................................................... .5-20
Figure 5-17 Discharging the Anode ......................................................... 5-21
Figure
5-18 Removing the Anode Connector ........................................... .5-22
Figure 5-19 Monitor Board Screw ............................................................ 5-23
Figure 5-20 Unplugging Cables and Pushing the Anode Wire Through
the Shield ............................................................................ 5-24
viii

Figure 5-21
Figure 5-22
Figure 5-23
Figure 5-24
Figure 5-25
Figure 5-26
Figure 5-27
Figure 5-28
Figure 5-29
Figure 5-30
Figure 5-31
Figure 5-32
Figure 5-33
Figure 5-34
Figure 5-35
Figure 5-36
Figure 5-37
Figure 5-38
Figure 5-39
Figure 5-40
Figure 5-41
Figure 5-42
Figure 5-43
Figure 5-44
Figure 5-45
Figure 5-46
Figure 5-47
Figure 5-48
Figure 5-49
Figure 5-50
Figure 5-51
Figure 5-52
Figure 5-53
Figure 5-54
Figure 5-55
Figure 5-56
Contents IIIII
Removing Connectors, Lug, Spring, and Braided Ground
Straps ................................................................................. 5-27
Disconnecting Power LED Cable .......................................... .5-28
Removing the Four Bezel Screws and the Top Screw .............5-29
Removing the CRT Assembly ................................................ .5-30
CRT Installation ................................................................... 5- 31
Removing Cables, Screws, and Heat Shield ........................... .5-33
Sliding Drive and Housing Out of the System Unit ................5-34
Sliding the Diskette Drive from Its Housing ..........................5-35
Jumper FG Location (Diskette Drive) ................................... .5-37
Removing LED Cable and Plastic Dress Bezel ........................5-38
Power Supply Ground Wire ................................................. .5-39
Lifting Out Power Supply, 1j0-Video, and CPU Boards..........5-40
CPU Board Components and Jumpers .................................... 5-41
Removing the Power On LED Assembly ................................. 5-44
Replacing the Power LED Assembly ....................................... 5-45
Mounting Screws ................................................................. .5-46
Removing the I/O-Video Board Bezel.. ................................. .5-47
Removing the I/O-Video Board Shield ................................... 5-48
Removing the Expansion Box Cover ...................................... 5-51
Hard Disk Drive Cables and Screws ...................................... 5-53
Hard Disk Drive Removal with Fan Present .......................... .5-54
Removing Base Plate ............................................................ .5-56
ReadjWrite Board Screws and Washers ................................. .5-57
Removing Connectors 1 and 2 ..............................................5-58
Removing Connector 3 .........................................................5-59
Jumper Setting for Drive Select ............................................ .5-60
Removing Skid Plate ............................................................. 5-61
Replacing Base Plate ............................................................ .5-62
Hard Disk Drive Installation ................................................ .5-63
Gaining Access to the Card Cage ......................................... .5-64
Removing Hard Disk Controller ........................................... .5-65
Removing Option Board ....................................................... .5-66
Removing Backplane ............................................................ .5-67
Removing Fan ...................................................................... .5-69
Removing Bridge and Power Connector ................................ .5-71
Power Regulator Board ......................................................... 5-73
ix

Introduction
The VAXmate Service Guide is packaged in the VAXmate Maintenance Kit
and is designed to help you diagnose and repair the VAXmate Workstation.
This guide also describes the basic concepts of connecting the VAXmate to a
network, and troubleshooting a part of the VAXmate network.
WARNING
The procedures in this guide are for DIGITAL service technicians
only.
By using this guide, along with the other items in the Maintenance Kit, you
can isolate problems to the field replaceable unit (FRU).
/-1

11111 Introduction
Make sure your Maintenance Kit contains these items.
LOOPBACK CONNECTORS AND TERMINATORS
~
PRINTER
MOUSE
TWO 50-OHM TERMINATORS
DISKETTES
SERVICE DIAGNOSTICS
SERVICE GUIDE
AND 3-RING BINDER
l'liXmate
1111111
LJ-0896
Maintenance Kit Items
/-2

Introduction 11111
The part numbers for the VAXmate Maintenance Kit items are as follows.
Description of Item
VAXmate Maintenance Kit
Communications loop back connector
Printer loopback connector
Mouse loopback connector
T-connector
BNC terminator (50-ohm) (two)
Formatted high density diskette (RX33)
Formatted Low Density Diskette (RX3 1)
VAXmate Service Diagnostic diskette
VAXmate Service Guide
DEPCA Service Diagnostic diskette'
DEPCA Service Guide'
DECNA loop back connector'
Part/Kit No.
00-Z6002-M7
12-15536-06
12-25083-01
12-25628-01
12-25534-01
12-25535-01
BN-HU11A-BK
BL-N402A-BK
BN-HD93x-Y7
EK-P500B-SV
Bl-KL23x¥H
EK-DEPCA-SV
12-22196-01
In addition to the Maintenance Kit you may also need these items, depending
on the type of repair. Ask your branch to order them for you.
Description of Item Part No. Type of Repair
Ohmmeter (times 1 scale)
N/A
Network testing
Anode discharge tool
29-24717
CRT or monitor board
replacement
Metric tape measure
29-25342
Video alignment
This guide does not help you diagnose problems caused by options purchased
from vendors other than DIGITAL.
• These items are for servicing Digital's network adapter (DEPCA) for IBM personal
computer.
1-3

IIIII Introduction
The chapters and appendices in this guide are as follows.
Chapter 1, Overview, describes the VAXmate computer.
Chapter 2, Troubleshooting the VAXmate Workstation, describes the testing
procedure and how to isolate problems to the failing field replaceable unit
(FRU).
Chapter 3, ThinWire Ethernet, describes ThinWire Ethernet terms, gives
installation examples, and gives procedures for troubleshooting part of the
VAXmate ThinWire network.
Chapter 4, Monitor Adjustments, describes how to adjust the screen display
after replacing of the CRT and/or the monitor board.
Chapter 5, FRU Replacement describes how to remove faulty FRUs and
replace them with new FRUs.
Appendix A, Part Numbers lists the recommended spares for the VAXmate
workstation. It also lists networking and printer components, and order
numbers.
Appendix B, Test Descriptions, describes the tests in the Service Diagnostics.
Use
this as a reference to Chapters 2, 3, and 4.
Appendix C, Error Numbers lists all error numbers and possible messages that
can occur through diagnostic testing. Also listed with the error numbers are
the corresponding FRUs (Field Replaceable Units).
For more information on the VAXmate computer and information about
networking, refer to the documents in Table 1-1.
/-4

Introduction IIIII
Table 1-1 Related Documents
Document Part Number
VAXmate Workstation
VAXmate System Handbook
VAXmate System Administrator's Guide, including:
-VAXmate User's Guide, Volume 1 and 2
VAXmate
Technical Description Manual
VAXmate Technical Reference Manual, Volume 1 and 2
(programming reference manuals and binders)
VAXmate Illustrated Parts Breakdown Manual
Options
VAXmate Expansion Box Installation Guide (Card)
VAXmate Expansion Box Internal Option Installation Guide (Card)
VAXmate Expansion Box Installation Guide and Owner's Manual
VAXmate Integral Modem User's Guide
PCSOX-MA Modem Installation Guide
PCSOX-AA Memory Installation Guide
80287 Coprocessor Installation Guide
VAXmate PCSOX-MA Integral Modem User's Guide
Installing and Using the LA7S Companion Printer
Networks
DECconnect System Requirements Evaluation Workbook
DECconnect System Planning and Configuration Guide
DECconnect System Installation and Verification Guide
DESTA Installation Card
DESTA Technical Description
ThinWire Ethernet Cable Connector Installation Guide (Card)
Ethernet Installation Guide, Volume 1
Vendor
Equipment Services
YES Mini Reference Guide, Volume 1
YES Mini Reference Guide, Volume 2
YES Mini Reference Guide, Volume 3
YES Mini Reference Guide, Volume 4
YES Mini Reference Guide, Volume 5
AA-]C47A-TH
QLA93-GZ
EK-PCSOO-TD
Q6ZCS-GZ
EK-PCSOO-IP
EK-RCD31-IN
EK-BASOO-IN
EK- RCD3 I-OM
EK-PSOXM-UG
EK-PSOXM-IN
EK-P50XA-IN
EK-FP287
-IN
EK-P50XM-UG
EK-OLA7S-UG
EK-DECSY-EG
EK-DECSY-CG
EK-DECSY-VG
EK-DESTA-IN
EK-DESTA-TM
EK-CABLE-IN
EK-ETHER-IN
EK- MINI1-RG
EK-MINI2-RG
EK-MINI3-RG
EK-MINI4-RG
EK-MINI5-RG
1-5

1.1 Introduction
Chapter 1
Overview
The VAXmate Workstation (Figure 1-1) is a desktop computer. It can be used
as a standalone personal computer or, more often, as a node on a network to a
VAX, MicroVAX II computer, or even to another VAXmate that has network
server software. The VAXmate computer is compatible with industry-standard-
personal computers and runs both industry-standard- applications and applica-
tions designed by DIGITAL.
As a node on the Personal Computing System Architecture (PCSA) network, the
VAXmate computer system is the user's interface into the applications and
services that the PCSA family of products provides. As part of a network, the
VAXmate computer communicates with other computers on the network, as
well as shares the various resources and services offered by DIGITAL com-
puters and servers.
- The computer industry recognizes two open architectures as industry standards. The
first is
the IBM-pe-AT bus structure. The second is the MicroSoft disk operating
system (MS-DOS). The term industry-standard refers to compatibility with these
architectures. To support MS-DOS requires a defined set of ROM-BIOS (basic I/O
system) services, which the VAXmate workstation offers.
1-1

\\\\\ Overview
DISKETTE DRIVE
SYSTEM
UNIT
EXPANSION BOX
Figure 1-1 VAXmate Workstation
1-2

Overview IIIII
1.2 VAXmate Workstation Components
The VAXmate workstation consists of the following items. An asterisk (') indi-
cates that the component is a field replaceable unit (FRU).
System
Unit including:
• Power indicator light'
• Monitor (amber or green screen),
• Monitor Board'
• I/O-Video Board' containing:
Video
controller
Diskette controller
Communications port
Printer port
Port for integral modem option
DIGITAL ThinWire Ethernet interface
• CPU Board' containing:
Memory (1 Mbyte)
80286 processor
Keyboard port
Mouse port
Socket for 80287 coprocessor option
Connector for memory option board
• Power Supply (120 V or 240 V)'
• Diskette drive (1.2 Mbytes),
Keyboard (LK2 50)'
Mouse'
Speaker'
LAN (Local Area Network) assembly' (ThinWire Ethernet) including:
• Thin Wire Ethernet Cable
• One T-connector
• One terminator (50-ohm)
• Indicates that the component is a field replaceable unit (FRU).
1-3