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IBM PS/2 50 Hardware Maintenance Service

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IBM PS/2 Model 50 HMS
FRONT
PICTURE 1
March 21, 1990
This pamphlet contains procedures for isolating problems to a FRU, a
Symptom-to-FRU Index, and a parts listing for the IBM(*) Personal
System/2(*) Model 50.
This pamphlet is intended to be used with the IBM Personal System/2
Hardware Maintenance Reference manual (part number 15F2190) and the IBM
Personal System/2 Hardware Maintenance Service manual (part number
15F2200).
Part Number 15F2193
Form Number S15F-2193-00
FRONT - 1

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Summary of Contents for IBM PS/2 50

  • Page 1 Symptom-to-FRU Index, and a parts listing for the IBM(*) Personal System/2(*) Model 50. This pamphlet is intended to be used with the IBM Personal System/2 Hardware Maintenance Reference manual (part number 15F2190) and the IBM Personal System/2 Hardware Maintenance Service manual (part number 15F2200).
  • Page 2 Such references or information must not be construed to mean that IBM intends to announce such IBM products, programming, or services in your country. Requests for technical information about IBM products should be made to your IBM Authorized Dealer or your IBM Marketing Representative.

  • Page 3: Special Notices

    Special Notices FRONT_2 Special 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.

  • Page 4: Table Of Contents

    IBM PS/2 Model 50 HMS Table of Contents CONTENTS Table of Contents FRONT_1 Safety Information FRONT_2 Special Notices CONTENTS Table of Contents General Checkout Installed Devices List Automatic Configuration Device Type SCSI Devices Non-SCSI Devices Power-On Password Undetermined Problem Power Supply Voltages / Fan...

  • Page 5: General Checkout

    IBM PS/2 Model 50 HMS General Checkout 1.0 General Checkout The advanced diagnostic tests are intended to test only IBM products. Non-IBM products, prototype cards, or modified options can give false errors and invalid system responses. IMPORTANT: If more than one error code is displayed, diagnose the first error code first.
  • Page 6 IBM PS/2 Model 50 HMS General Checkout +---+ - Remove the Reference Diskette and restart the system. DID THE ERROR REMAIN? ¦ ¦ ¦ +---+ ¦ ¦012¦ ¦ +---+ ¦ If you suspect another problem, or want to run system checkout, ¦...
  • Page 7 IBM PS/2 Model 50 HMS General Checkout ¦020¦ +---+ Follow the action described on the screen. If that does not correct the problem go to "Symptom-to-FRU Index" in topic 12.0. -------------------------------------------------------------------------- 1.0 - 3...

  • Page 8: Installed Devices List

    IBM PS/2 Model 50 HMS Installed Devices List 2.0 Installed Devices List If an adapter or device is missing from the list, you may have one of the following conditions: Your Reference Diskette does not contain the module of code required to support that device.
  • Page 9 IBM PS/2 Model 50 HMS Automatic Configuration 2.1 Automatic Configuration Warning: A customized setup configuration (other than default settings) may exist on the system you are servicing. Running Automatic Configuration may alter those settings. Note the current configuration settings (using the View Configuration option) and verify that the settings are in place when service is complete.
  • Page 10 IBM PS/2 Model 50 HMS Device Type 2.2 Device Type Run Automatic Configuration (see "Automatic Configuration" in topic 2.1 before continuing) and determine which type of device, SCSI or non-SCSI, is missing from the Installed Devices List, in Advanced Diagnostics, then continue with the following steps.
  • Page 11 IBM PS/2 Model 50 HMS SCSI Devices 2.3 SCSI Devices The adapter supporting the missing device may be defective. If more than one SCSI adapter is installed, isolate them one at a time. Power-off the system and disconnect all internal and external cables attached to the SCSI adapter.
  • Page 12 IBM PS/2 Model 50 HMS Non-SCSI Devices 2.4 Non-SCSI Devices The missing device is defective. If that does not correct the problem, go to "Undetermined Problem" in topic 4.0. Note: If the number of diskette drives shown on the list is incorrect, an error can occur during the tests.

  • Page 13: Power-On Password

    IBM PS/2 Model 50 HMS Power-On Password 3.0 Power-On Password To service a system with an active, unknown, power-on password do one of the following, depending on which battery and speaker assembly is installed. On the type with two pins on the side of the speaker assembly, short the pins together.

  • Page 14: Undetermined Problem

    IBM PS/2 Model 50 HMS Undetermined Problem 4.0 Undetermined Problem Power-off the system. Remove or disconnect one of the following adapters or devices. Non-IBM devices Any external device (modem, printer, or mouse) Math Coprocessor Any adapter Fixed disk or diskette drive Memory module kits.

  • Page 15: Power Supply Voltages / Fan

    IBM PS/2 Model 50 HMS Power Supply Voltages / Fan 5.0 Power Supply Voltages / Fan If the fan is not running, check the fan connector for -9.0 to -15.0 Vdc, approximately -12 Vdc desired. If the voltage is correct, replace the fan.

  • Page 16: Enable And Disable Settings

    IBM PS/2 Model 50 HMS Enable and Disable Settings 6.0 Enable and Disable Settings To verify that the "Enable" and "Disable" settings are correct, select Set and View SCSI Device Configuration from the Set Configuration menu, and determine if there are any "Presence Error Reporting" devices listed.

  • Page 17: Display Self-Test

    IBM PS/2 Model 50 HMS Display Self-Test 7.0 Display Self-Test Power-off the system unit and display. Disconnect the display signal cable. Power-on the display. Turn the contrast to its maximum position. Turn the brightness control to the center detent position.

  • Page 18: Display Adapter 8514/A

    IBM PS/2 Model 50 HMS Display Adapter 8514/A 8.0 Display Adapter 8514/A PICTURE 4 8.0 - 1...

  • Page 19: Keyboard

    IBM PS/2 Model 50 HMS Keyboard 9.0 Keyboard +---+ ¦001¦ +---+ - Power-off the system. - Disconnect the keyboard cable from the keyboard. - Power-on the system and check the keyboard cable connector for the voltages shown. All voltages are ± 5%.

  • Page 20: Printer

    IBM PS/2 Model 50 HMS Printer 10.0 Printer Make sure the printer is properly connected and powered-on. Run the printer self-test. If the printer self-test does not run correctly, the problem is in the printer. Refer to the printer service manual.

  • Page 21: Memory

    IBM PS/2 Model 50 HMS Memory 11.0 Memory Note: Power-off the system before removing or replacing parts. 00011000 indicates a system board parity check error. Replace the memory modules. If that does not solve the problem, replace the system board.
  • Page 22 An "X" in an error message can be any number. Note: If you are unable to find an error message, you have an IBM device with its own service manual or a device not supported by the advanced diagnostic tests.
  • Page 23 IBM PS/2 Model 50 HMS Symptom-to-FRU Index ¦ One long and two short ¦ System Board ¦ ¦ beeps ¦ Power Supply ¦ ¦ ¦ ¦ +------------------------------------+-----------------------------------¦ ¦ ¦ ¦ ¦ One short beep and a ¦ System Board ¦...
  • Page 24 IBM PS/2 Model 50 HMS Symptom-to-FRU Index +------------------------------------+-----------------------------------¦ ¦ 000304XX ¦ ¦ ¦ ¦ System Board ¦ ¦ ¦ Keyboard ¦ ¦ ¦ ¦ +------------------------------------+-----------------------------------¦ ¦ 000305XX ¦ ¦ ¦ ¦ Fuse ¦ ¦ ¦ Keyboard Cable ¦ ¦ ¦...

  • Page 25: Symptom-To-Fru Index

    IBM PS/2 Model 50 HMS Symptom-to-FRU Index ¦ ¦ Display ¦ ¦ ¦ ¦ +------------------------------------+-----------------------------------¦ ¦ 002409XX ¦ ¦ ¦ ¦ Display ¦ ¦ ¦ ¦ +------------------------------------+-----------------------------------¦ ¦ 002410XX ¦ ¦ ¦ ¦ System Board ¦ ¦ ¦ ¦ +------------------------------------+-----------------------------------¦...
  • Page 26 IBM PS/2 Model 50 HMS Symptom-to-FRU Index ¦ ¦ Multiprotocol Adapter/A ¦ ¦ ¦ ¦ +------------------------------------+-----------------------------------¦ ¦ 010008XX, 010009XX ¦ ¦ ¦ ¦ Multiprotocol Adapter/A ¦ ¦ ¦ Any Serial Device ¦ ¦ ¦ ¦ +------------------------------------+-----------------------------------¦ ¦ 0100XXXX ¦ ¦...
  • Page 27 IBM PS/2 Model 50 HMS Symptom-to-FRU Index ¦ ¦ 6157 Tape Attachment ¦ ¦ ¦ Adapter ¦ ¦ ¦ ¦ +------------------------------------+-----------------------------------¦ ¦ 0194XXXX ¦ ¦ ¦ ¦ Memory-module package on ¦ ¦ ¦ the 2-8MB 80286 Memory ¦ ¦ ¦...
  • Page 28 IBM PS/2 Model 50 HMS Symptom-to-FRU Index -------------------------------------------------------------------------- -------------------------------------------------------------------------- -------------------------------------------------------------------------- -------------------------------------------------------------------------- -------------------------------------------------------------------------- -------------------------------------------------------------------------- 12.0 - 7...

  • Page 29: System Overview

    IBM PS/2 Model 50 HMS System Overview 13.0 System Overview PICTURE 6 13.0 - 1...

  • Page 30: How To Use This Parts Catalog

    IBM PS/2 Model 50 HMS How To Use This Parts Catalog 14.0 How To Use This Parts Catalog SIMILAR ASSEMBLIES: If two assemblies contain a majority of identical parts, they are broken down on the same list. Parts peculiar to one or the other of the assemblies are listed separately and identified by description.
  • Page 31 IBM PS/2 Model 50 HMS Example of a Parts List 14.1 Example of a Parts List System Unit Cover 72X8501 Front Bezel/Logo (R) 72X8502 Miscellaneous Hardware Kit (AR) 72X8580 Knob Assembly, Fixed Disk Drive Support Structure Knob Washer 14.1 - 1...

  • Page 32: Parts

    IBM PS/2 Model 50 HMS Parts 15.0 Parts System Unit Cover 72X8501 Front Bezel/Logo 021 (R) 72X8502 (Exchange Basis Only) Front Bezel/Logo 031, 061 (R) 15F7697 (Exchange Basis Only) Drive Bezel Kit (AR) 15F7571 Blank Drive Bezel (AR) 72X8531 Fan Assembly...
  • Page 33 IBM PS/2 Model 50 HMS Parts Internal 60MB Adapter/A 30F5273 Adapter Cable (34 pin) 34F2990 Tape Cover Plate 30F5275 Formatted Blank Tape 30F5277 Multiprotocol Adapter/A 90X8995 Realtime Interface CoProcessor Multiport/2 09F1888 8-port RS232-C Electrical Interface Board 09F1889 4-port RS232-C Electrical Interface Board...
  • Page 34 IBM PS/2 Model 50 HMS Parts 110/125 or 220/240 Vac (Southern Hemisphere) 39F8068 8512 Color Display 110/120 Vac 61X8924 220/240 Vac (Northern Hemisphere) 61X8928 220/240 Vac (Southern Hemisphere) 61X8927 Tilt/Swivel Stand 61X8925 8513 Color Display 110/120 Vac 68X3088 220/240 Vac (Northern Hemisphere)
  • Page 35 IBM PS/2 Model 50 HMS Parts -------------------------------------------------------------------------- -------------------------------------------------------------------------- Printed in the United States of America 15.0 - 4...

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