IBM PS/1 Owner's manual

Machine Types 2133, 2155, and 2168

Machine Types 2133, 2155, and 2168

First Edition (March 1993)
This publication could include technical inaccuracies or typographical errors. Changes
are periodically made to the information herein; these changes will be incorporated in
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It is possible that this publication may contain reference to, or information about, IBM
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Address comments about this publication to IBM Corporation, Dept. E23/962-2,
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used by IBM without obligation.
Copyright International Business Machines Corporation 1993. All rights reserved.

Contents
Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Voltage Supply Switch Settings .................... vii
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . viii
For Denmark: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Chapter Description . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Hardware Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Power-On Password . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
Using the Configuration Utility ..................... 1-14
Configuration Utility Screen ..................... 1-15
How to Get the Screen ....................... 1-18
System Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
SIMM Identification . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
Operating Requirements . . . . . . . . . . . . . . . . . . . . . . . . 1-23
Special Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
Diagnostic Information . . . . . . . . . . . . . . . . . . . . . . . . 2-1
MAP 0010: Start . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
MAP 0020: Power . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
MAP 0100: System Board . . . . . . . . . . . . . . . . . . . . . . 2-30
MAP 0200: Memory . . . . . . . . . . . . . . . . . . . . . . . . . . 2-36
MAP 0300: Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . 2-54
MAP 0600: 3.5-Inch Diskette Drive .................. 2-58
MAP 0625: 5.25-Inch Diskette Drive ................. 2-66
MAP 0700: Math Coprocessor . . . . . . . . . . . . . . . . . . . . 2-70
MAP 0900: Parallel Port . . . . . . . . . . . . . . . . . . . . . . . 2-72
MAP 1100: System Board Serial Port ................ 2-73
MAP 1200: Serial Port Adapter .................... 2-75
MAP 1700: Hard Disk Drive ..................... 2-79
MAP 2000: Riser Card . . . . . . . . . . . . . . . . . . . . . . . . 2-93
MAP 2400: Video Graphics Array ................... 2-97
MAP 8600: Mouse . . . . . . . . . . . . . . . . . . . . . . . . . 2-119
Diagnostic Aids . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Contents iii

Power-On Self Test ........................... 3-2
Advanced Diagnostics Diskettes .................... 3-3
Diagnostic Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Select an Option Menu ....................... 3-4
Diskette Drive Menu ......................... 3-4
Hard Disk Drive Menu ........................ 3-6
Video Graphics Array Menu ..................... 3-7
Formatting a Hard Disk ....................... 3-8
Error Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Setup Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Set Configuration Menu ....................... 3-11
Display Self Test ............................ 3-11
Repair Information . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Hard Disk Drive Jumper Settings .................... 4-2
Removals and Replacements—Machine Types 2133 and 2155 .... 4-4
1005—Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
1010—Left DASD Support Bracket ................. 4-6
1015—Right DASD Support Bracket ................ 4-7
1020—3.5-Inch Diskette Drive ................... 4-9
1025—5.25-Inch Diskette Drive ................... 4-10
1030—Hard Disk Drive ....................... 4-11
1035—Adapter Card . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
1040—Power Supply . . . . . . . . . . . . . . . . . . . . . . . . 4-14
1045—Riser Card . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
1050—Memory (SIMM) . . . . . . . . . . . . . . . . . . . . . . . 4-16
1055—Cache Memory . . . . . . . . . . . . . . . . . . . . . . . . 4-18
1056—Video RAM (486SX Only) .................. 4-20
1060—Math Coprocessor (386SX, 486SX, and Upgrade for
486DX/486DX2) . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
1080—Lithium Battery . . . . . . . . . . . . . . . . . . . . . . . . 4-24
1085—Indicator LED and Cable ................... 4-25
1090—System Board . . . . . . . . . . . . . . . . . . . . . . . . 4-26
1100—Tilt Swivel . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27
Removals and Replacements—Machine Type 2168 .......... 4-28
2005—Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-29
2020—3.5-Inch Diskette Drive ................... 4-31
2025—5.25-Inch Diskette Drive ................... 4-32
2030—Hard Disk Drives ....................... 4-33
2035—Adapter Card . . . . . . . . . . . . . . . . . . . . . . . . . 4-35
2040—Power Supply . . . . . . . . . . . . . . . . . . . . . . . . 4-36
2045—Riser Card . . . . . . . . . . . . . . . . . . . . . . . . . . 4-37
2050—Memory (SIMM) . . . . . . . . . . . . . . . . . . . . . . . 4-38
2055—Cache Memory . . . . . . . . . . . . . . . . . . . . . . . . 4-39
iv

2060—Upgrade Processor (486DX and 486DX2 with 72-Pin
Memory SIMM Only) ........................ 4-41
2080—Lithium Battery . . . . . . . . . . . . . . . . . . . . . . . . 4-43
2085—Indicator LED and Cable ................... 4-44
2090—System Board . . . . . . . . . . . . . . . . . . . . . . . . 4-45
2100—Tilt Swivel . . . . . . . . . . . . . . . . . . . . . . . . . . 4-46
Handling ESD-Sensitive Parts ..................... 4-47
Software Installation Procedure .................... 4-48
Parts/Test Point Locations ...................... 5-1
System Board Layouts ......................... 5-2
386SX 25MHz (72-Pin Memory SIMM) System Board Layout ... 5-3
386SX 25MHz (72-Pin Memory SIMM) System Board Layout ... 5-5
386SX 25MHz (72-Pin Memory SIMM) System Board Layout ... 5-7
486SX 20MHz/486SX 25MHz Level 1 (30-Pin Memory SIMM)
System Board Layout ....................... 5-9
486SX 25MHz Level 2 (30-Pin Memory SIMM) System Board
Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11
486DX 33MHz (30-Pin Memory SIMM) System Board Layout ... 5-13
486SX 33MHz (72-Pin Memory SIMM) System Board Layout ... 5-15
486DX 25MHz/486DX2 50MHz or 486DX 33MHz/486DX2 66MHz
(72-Pin Memory SIMM) System Board Layout .......... 5-17
Detachable Display System I/O Signal Cable Connector Test Points 5-19
System Board Connector Assignments ............... 5-20
Safety Inspection Guide ....................... 6-1
Parts Catalog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
Catalog Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
Assembly 1: Machine Types 2133 and 2155 System Unit - Exterior 7-4
Assembly 2: Machine Types 2133 and 2155 System Unit - Interior 7-6
Assembly 3: Machine Type 2168 System Unit - Exterior ..... 7-10
Assembly 4: Machine Type 2168 System Unit - Interior ...... 7-12
Assembly 5: Diskette and Hard Disk Drives - All Machine Types . 7-16
Assembly 6: Display and Power Cord (Linecord) - All Machine
Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-18
Assembly 7: Keyboard and Mouse - All Machine Types ...... 7-22
Assembly 8: Software - Level 1 .................. 7-25
Assembly 9: Software - Level 2 .................. 7-27
Part Number Index .......................... 8-1
Appendix. Model Configurations and FRU Part Numbers ..... A-1
Contents v

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . X-1
vi

Notices
References in this publication to IBM products, programs, or services do not
imply that IBM intends to make these available in all countries in which IBM
operates. Any reference to an IBM product, program, or service is not
intended to state or imply that only IBM’s product, program, or service may
be used. Any functionally equivalent product, program, or service that does
not infringe any of IBM’s intellectual property rights or other legally
protectable rights may be used instead of the IBM product, program, or
service. Evaluation and verification of operation in conjunction with other
products, programs, or services, except those expressly designated by IBM,
are the user’s responsibility.
IBM may have patents or pending patent applications covering subject
matter in this document. The furnishing of this document does not give you
any license to these patents.
Voltage Supply Switch Settings
Before setting up your computer as described in the Start Here publication,
follow these instructions to avoid damaging your computer:
Your IBM* Personal System/1* (PS/1*) computer
may have voltage
switches, which must be set correctly for your voltage supply. If your display
or system unit has a voltage switch, complete these steps to make sure
each switch is set correctly.
1. Determine the correct voltage switch setting for your area:
2. Locate the voltage switch on the back of your display or system unit. If
the setting shown on the switch is:
Correct, start setting up your PS/1 computer.
Incorrect, change the voltage switch setting. (You may need a
small screwdriver.)
Voltage Supply
Range Voltage Switch Setting
100–127 V 115 V or 115
200–240 V 230 V or 230
Notices vii

Safety Information
The construction of the IBM PS/1 computer provides extra protection against
the risk of electrical shock by either grounding of metal parts or using an
approved system of double insulation. If your computer has the symbol
(on the voltage rating plate on the back of the display), it does not require
grounding. This computer has a power cord with a two-pin plug. If your
computer does
not have the symbol, it must be connected to an electrical
outlet that is properly grounded. This computer has a power cord with a
three-prong plug. It is the responsibility of the person installing the computer
to connect it to a properly grounded electrical outlet. Seek professional
assistance before using an adapter or extension cord; these devices could
interrupt the grounding circuit.
If the computer is connected to an electrical outlet that is incorrectly
connected to the building wiring, serious electrical shock could result.
For continued protection against the risk of electrical shock:
Connect your computer only to an electrical outlet of the correct voltage.
If your computer has cables other than the power cords, you must
connect them before plugging the power cord into an electrical outlet.
Before removing these cables, you must first unplug the power cords
from the outlet.
If your computer has a telephone connection, do not touch the tele-
phone cords when there is lightning in the area.
Do not use or store the computer in an area where it can become wet.
Make sure all replacement parts have characteristics identical or equiv-
alent to the original parts. Other parts may not have the same safety
features.
Refer service or repairs to qualified service personnel.
If your computer uses lithium batteries, there may be a risk of fire, explosion,
or burns if the batteries are handled incorrectly. To ensure safety:
Do not recharge, disassemble, heat, or incinerate a lithium battery.
Replace the battery with an identical or equivalent type lithium battery.
Discard used lithium batteries according to local country dispositions.
viii

For Denmark:
ADVARSEL!
Lithiumbatteri - Eksplosionsfare ved fejlagtig håndtering. Udskiftning må kun
ske med batteri af samme fabrikat og type. Levér det brugte batteri tilbage
til leverandøren.
Notices ix

Trademarks
The following terms, denoted by an asterisk (*) in this publication, are trade-
marks of IBM Corporation in the United States and/or other countries.
The following terms, denoted by a double asterisk (**) in this publication, are
trademarks of other companies as follows:
IBM
AT
Operating System/2
OS/2
Personal System/1
PS/1
PS/1 Club
Personal System/2
PS/2
America Online America Online, Inc.
Microsoft Microsoft Corporation
Intel Intel Corporation
Overdrive Intel Corporation
Pentium Intel Corporation
Triplett Triplett Corporation
Windows Microsoft Corporation
386, 386SX, 486, 486SX, 486DX Intel Corporation
x

Preface
This manual is intended to be used as a stand-alone document to service
this product. It is divided into the following chapters:
“General Information” contains a brief description of this manual.
“Diagnostic Information” provides step-by-step instructions that aid in
locating the failing Field Replaceable Unit (FRU).
“Diagnostic Aids” explains the diagnostic aids that are available for
troubleshooting problems on the system unit.
“Repair Information” contains the procedures for removing FRUs.
“Parts/Test Point Locations” contains illustrations of the locations of
the major components and connectors.
“Safety Inspection Guide” contains information about inspecting a
machine for safety problems before putting the machine under a Mainte-
nance Agreement.
“Parts Catalog” contains illustrations and part numbers for individual
FRUs.
“Part Number Index” contains part numbers listed in numerical order.
Appendix, “Model Configurations and FRU Part Numbers” contains
models and FRUs listed by part number for all countries.
xi

xii

General Information
Chapter Description . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Hardware Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Power-On Password . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
Using the Configuration Utility ..................... 1-14
Configuration Utility Screen ..................... 1-15
How to Get the Screen ....................... 1-18
System Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
SIMM Identification . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
Operating Requirements . . . . . . . . . . . . . . . . . . . . . . . . 1-23
Special Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
General Information 1-1

Chapter Description
This chapter contains general information about the contents of this manual,
product descriptions, and other information useful when servicing the
product.
“Diagnostic Information”
The diagnostic information contains the procedures you use to diagnose and
isolate product failures. Diagnostic information consists of the:
Start MAP
Maintenance Analysis Procedures (MAPs)
Diagnostic Aids
Start MAP: This MAP is the starting point for any diagnostic action.
Based on high-level symptoms, the information in this MAP directs you
to more detailed procedures to help you resolve the machine failure.
Maintenance Analysis Procedures: When Start sends you to a MAP, go
to that page and perform the steps as instructed. If there are any notes
or instructions at the top of the page, you must read them before you
start the procedure.
Carefully read each step of the MAP and perform the appropriate action as
instructed. If you do not remember the location of a specific part or test
point, or if you do not remember an adjustment or removal procedure, see
the chapter that has that information. Always return to the MAP after you do
this. In some cases, you are sent to other MAPs to find the failure.
Failing Parts or Assemblies: The MAPs generally help you trace a
problem to one part or assembly. The last step of the specific MAP you are
using indicates that a part or assembly is failing. You should inspect the
part or assembly before you decide to replace it. It may only be loose, dirty,
or in need of a small repair. The MAPs may lead you to two, or even three,
possible failing parts or assemblies. The parts that may be failing are listed
in order of the most probable failure.
1-2

Measuring Voltages: Many MAP steps instruct you to measure voltages
on cable plugs and electronic board connectors. If you are asked to
measure voltage at several places on a plug or connector, a chart next to or
near the instruction indicates the number of the plug or connector, the pin
numbers you should measure, the signal name, and the correct voltage for
the condition you are measuring. Measure the voltage only at the pins listed
in the chart. Remember to set your meter on the correct scale and to put
the meter leads in the correct position for the voltage you are asked to
measure.
Note: Use frame ground for the ground reference. Attach the black meter
(ground) lead to frame ground, except where specified otherwise.
“Diagnostic Aids”
This chapter contains information outside the MAPs to help you diagnose a
failure of a specific part. Some diagnostic aids are resident in the machine,
such as the Power-On Self Test (POST). The machine performs the POST
each time it is turned on. Use this information throughout the diagnostic pro-
cedures. You should become familiar with the POST and be able to deter-
mine if the machine performed all the steps.
Power-On Self Test (POST): The POST is initiated automatically each
time the system unit is powered on. The POST is a series of system checks
and initializations that verify the correct operation of the base system. Two
classifications of malfunctions may be detected during the POST: critical and
noncritical.
Critical malfunctions prevent the system from operating at all, or could cause
incorrect results that are apparent to the user. Examples of critical errors
include processor or interrupt controller malfunctions. If a critical error is
detected during the POST, an attempt is made to indicate the error, and all
testing halts.
Noncritical malfunctions cause incorrect results that may not be apparent to
the user. An example of a noncritical error is a memory module failure. If a
noncritical error occurs, an error code is displayed, and the testing is
stopped. Testing can be continued on a noncritical error by pressing the
Esc key.
General Information 1-3

After a successful POST (one in which no critical errors were detected) a
single short beep is generated. The system attempts to load an operating
system. The system can be customized to different start methods. The
default is to do a “smart” boot.
Remember that the POST does not test all areas, but only those that allow
the system to operate well enough to run the Advanced Diagnostics
program.
“Repair Information”
This chapter contains removal and replacement instructions and hard disk
jumper settings.
“Parts/Test Point Locations”
This chapter contains system board layouts. It is useful when you are asked
to measure voltages. Use this information to help you locate parts such as
electronic boards, connectors, pin numbers, and test points.
“Safety Inspection Guide”
This chapter contains guidelines to help you identify possible safety con-
cerns. Use this information to inspect a machine for safety problems before
putting the machine under a Maintenance Agreement.
“Parts Catalog”
This catalog includes figures, part numbers, and part names.
“Part Number Index”
This chapter contains part numbers listed in numerical order.
Appendix, “Model Configurations and FRU Part Numbers”
This appendix contains tables, listed by country, of models and FRU part
numbers. Refer to this when ordering FRUs.
1-4

Product Description
This book contains service information for all models of the IBM PS/1 Com-
puter, Machine Types 2133, 2155, and 2168, worldwide. Machine Type
2133 contains bays for three diskette/hard disk drives and slots for three
adapter cards. Machine Type 2155 contains bays for five diskette/hard disk
drives and slots for five adapter cards. Machine Type 2168 contains bays
for six diskette/hard disk drives and slots for eight adapter cards.
For ordering information for all FRU parts, see Appendix, “Model Configura-
tions and FRU Part Numbers” on page A-1.
Security
Power-on password
System boards
386SX—25MHz processor (72-pin memory SIMM)
Three system boards available (refer to “System Board Layout” on
page 5-1):
1. Soldered on board—2MB system memory and 256 kilobytes
(K) video memory (DRAM)
2. Soldered on board—2MB system memory and 512K video
memory (DRAM)
3. Soldered on board—4MB system memory and 512K video
memory (DRAM)
Each system board contains:
– Math coprocessor socket.
– Two 72-pin system memory sockets (accepts 70 to 85 ns).
Maximum Memory = 16MB. Refer to “System Memory” on
page 1-20.
– Ports include: serial, parallel, keyboard, mouse, and video.
– Connectors for AT* riser card (120-pin), input power (12-pin),
AT diskette drives (34-pin), IDE AT hard disk drives (40-pin),
power LED (2-pin), hard disk LED (2-pin), and video feature
(26-pin).
– Lithium battery.
486SX—20MHz/25MHz processor (30-pin memory SIMMs)
– Math coprocessor socket.
– Supports 8K internal cache. (External cache is not supported.)
General Information 1-5

– RAM is installed directly onto the system board using industry
standard 30-pin 80 ns SIMMs. There are two banks of four sockets
to allow a maximum of 32 megabytes (MB). 256K, 1MB and 4MB
SIMMs are supported in both banks. Refer to “System Board
Layouts” on page 5-2. Bank 0 or bank 1 must be filled with the
same value SIMMs to work properly. Refer to “System Memory” on
page 1-20.
– 512K Video RAM is soldered on the system board and four sockets
are provided for an additional 512K Video RAM.
– Ports include: two serial, parallel, keyboard, mouse and video.
– Connectors for AT riser card (120-pin), input power (12-pin), AT
diskette drives (34-pin), IDE AT hard disk drives (40-pin), power
LED (2-pin), hard disk LED (2-pin), and video feature (26-pin).
– Lithium battery.
486DX—33MHz processor (socketed) with built-in math coprocessor
(30-pin memory SIMMs)
– Supports 8K internal cache and 128K external cache (not field
upgradeable).
– RAM is installed directly onto the system board using industry
standard 30-pin 80 ns SIMMs. There are two banks of four sockets
to allow a maximum of 32MB. 256K, 1MB, and 4MB SIMMs are
supported in both banks. One or both banks must be filled with the
same value SIMMs to work properly. Refer to “System Memory” on
page 1-20.
– 1MB of Video RAM is soldered on the system board.
– Ports include: two serial, parallel, keyboard, mouse, and video.
– Connectors for AT riser card (120-pin), input power (12-pin), AT
diskette drives (34-pin), IDE AT hard disk drives (40-pin), power
LED (2-pin), hard disk LED (2-pin), and video feature (26-pin).
– Lithium battery.
486SX—25MHz processor (72-pin memory SIMM)
Three system boards available:
1. 2MB SIMM for system memory and no cache sockets
2. 2MB SIMM for system memory and five cache sockets
3. 4MB SIMM for system memory.
Each system board contains:
– Upgrade processor socket.
– Supports 8K internal cache.
– Some models support 0, 128K, or 256K external cache (field
upgradeable).
– Shipped with 0 cache.
1-6