IBM PS/2 90 XP 486 Hardware Maintenance Reference
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IBM PS/2 90 XP 486 Hardware Maintenance Reference

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IBM PS/2 Model 90 XP 486 HMR
FRONT
PICTURE 1
Part Number 04G3388
Form Number S14F-2249-02
October 22, 1991
¦ Copyright IBM Corp. 1990, 1991
FRONT - 1

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  • Page 1 IBM PS/2 Model 90 XP 486 HMR FRONT PICTURE 1 Part Number 04G3388 Form Number S14F-2249-02 October 22, 1991 ¦ Copyright IBM Corp. 1990, 1991 FRONT - 1...

  • Page 2: Edition Notice

    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_1 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 90 XP 486 HMR Table of Contents CONTENTS Table of Contents EDITION Edition Notice FRONT_1 Special Notices CONTENTS Table of Contents Product Description Security 1.1.1 Cover Lock 1.1.2 Bolt-down Capability 1.1.3 Power-On Password System Features 1.2.1 Processor Board 1.2.2...

  • Page 5: Product Description

    IBM PS/2 Model 90 XP 486 HMR Product Description 1.0 Product Description The IBM (*) Personal System/2 (*) Model 90 XP (*) 486 computers use the IBM Micro Channel (*) architecture. The features of the various types of the Model 90 are:...
  • Page 6 IBM PS/2 Model 90 XP 486 HMR Security 1.1 Security Subtopics 1.1.1 Cover Lock 1.1.2 Bolt-down Capability 1.1.3 Power-On Password ¦ Copyright IBM Corp. 1990, 1991 1.1 - 1...
  • Page 7 IBM PS/2 Model 90 XP 486 HMR Cover Lock 1.1.1 Cover Lock The cover lock is in the middle of the rear panel of the system unit; the cover can't be removed without the cover-lock key. If the keys for the cover lock are lost, a new cover-lock assembly can be ordered (see the parts section in the Hardware Maintenance Service for the system you are servicing).
  • Page 8 IBM PS/2 Model 90 XP 486 HMR Bolt-down Capability 1.1.2 Bolt-down Capability The bolt-down capability allows you to attach the system unit to a table or desk. The table or desk must have holes drilled through it, and the bolts must be inserted from below (the table or desk) into the holes in the base of the system unit.
  • Page 9 IBM PS/2 Model 90 XP 486 HMR Power-On Password 1.1.3 Power-On Password A power-on password denies access to the system by an unauthorized user when the system is powered-on. When a power-on password is active, the password prompt (which resembles a small key) appears on the screen each time the system is powered-on (except when the system is in the Unattended Start Mode).
  • Page 10 IBM PS/2 Model 90 XP 486 HMR System Features 1.2 System Features The major features of the system include: Processor board CMOS RAM and CMOS RAM Extension Initial Machine Load (IML) Power-On Self-Test (POST) Basic Input/Output System (BIOS) Graphics array (VGA and XGA)
  • Page 11 IBM PS/2 Model 90 XP 486 HMR Processor Board 1.2.1 Processor Board The processor board is connected to the system through two dedicated in-line system-board connectors. The major components on the processor board are the system microprocessor, the system clock, the direct memory access (DMA) controller, and the memory controller.
  • Page 12 IBM PS/2 Model 90 XP 486 HMR CMOS RAM and CMOS RAM Extension 1.2.2 CMOS RAM and CMOS RAM Extension The CMOS RAM provides 64 bytes of storage. Fifty bytes are used to store system-configuration and security information. The real-time clock uses the remaining 14 bytes to track the date, time, and battery level.
  • Page 13 IBM PS/2 Model 90 XP 486 HMR IML, POST, and BIOS 1.2.3 IML, POST, and BIOS The Model 90 uses Initial Machine Load (IML) to store the power-on self-test (POST) and Basic Input/Output System (BIOS) code. With IML, some of the code is stored in ROM and is used for preliminary testing during power-on;...
  • Page 14 This slot (J3) includes the auxiliary video connector (AVC) and connects the VGA compatible video from the XGA (on the system board) to video adapters (example: IBM PS/2 Image Adapter/A - 1MB). ¦ Copyright IBM Corp. 1990, 1991 1.2.4 - 1...
  • Page 15 IBM PS/2 Model 90 XP 486 HMR Serial Ports 1.2.5 Serial Ports The serial ports are fully programmable and support asynchronous communications. The 9-pin and 25-pin D-shell connectors provide the signals to drive devices with a standard RS-232 connector. The connected device is identified by the system configuration as SERIAL 1 through SERIAL 8.
  • Page 16 IBM PS/2 Model 90 XP 486 HMR Parallel Port 1.2.6 Parallel Port The parallel port allows the attachment of devices that accept eight bits of parallel data at standard transistor-transistor-logic (TTL) levels. The port has a 25-pin D-shell connector and is designed primarily for printers.
  • Page 17 IBM PS/2 Model 90 XP 486 HMR Diskette-Drive Controller 1.2.7 Diskette-Drive Controller The diskette-drive controller is on the system board. The controller connects to the diskette drives through a 34-pin cable connector (the connector on the system board is a 40-pin cable-connector).
  • Page 18 IBM PS/2 Model 90 XP 486 HMR Keyboard Connector and Pointing Device Connector 1.2.8 Keyboard Connector and Pointing Device Connector The two 6-pin connectors in the rear of the system board are for a keyboard and a pointing device (mouse).
  • Page 19 IBM PS/2 Model 90 XP 486 HMR System Memory 1.3 System Memory The figure below shows the location of the memory-module-kit connectors J4 to J1 on the memory-riser cards. PICTURE 3 Two memory-riser cards plug into the system board; one in system-board slot J11 and one in J14.
  • Page 20 IBM PS/2 Model 90 XP 486 HMR System Memory +------------------------------------------------------------------------+ ¦ Paired Memory ¦ Memory Bank Size ¦ Memory Block ¦ Memory Now ¦ ¦ Kits ¦ ¦ Disabled ¦ Usable ¦ +-----------------+------------------+-----------------+-----------------¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦...

  • Page 21: Option Compatibility

    IBM PS/2 Model 90 XP 486 HMR Option Compatibility 2.0 Option Compatibility The Model 90 can use some adapters that are designed for IBM Personal System/2 systems that use the Micro Channel architecture. For supported options, see the parts section in the Hardware Maintenance Service pamphlet for the system you are servicing.
  • Page 22 ¦ ¦ ¦ +------------------------------------------------------------------------+ For additional information on this subject, see "Diskette Drives and Diskettes" in the IBM Personal System/2 Hardware Maintenance Reference General Information pamphlet. Note: You must only install drives designed for this system. Use of drives not designed for this system could cause intermittent problems.

  • Page 23: Hard Disk Drive

    IBM PS/2 Model 90 XP 486 HMR Hard Disk Drive 2.2 Hard Disk Drive The Model 90 comes with a Small Computer System Interface (SCSI) hard disk drive and a SCSI adapter. Up to three SCSI devices can be installed inside the system.

  • Page 24: Terminators

    IBM PS/2 Model 90 XP 486 HMR Terminators 2.3 Terminators Terminator requirements are: Diskette Drives: do not require terminators. Hard Disk Drives and other storage devices: The last device in any SCSI chain must have the terminator installed. (Some devices may have more than one terminator.) All other SCSI devices must have the terminators removed.

  • Page 25: Operating Requirements

    IBM PS/2 Model 90 XP 486 HMR Operating Requirements 3.0 Operating Requirements This section describes the operations that occur from the time the system is powered-on until the minimum operating requirements are met. Subtopics 3.1 Power Supply ¦ Copyright IBM Corp. 1990, 1991...

  • Page 26: Power Supply

    IBM PS/2 Model 90 XP 486 HMR Power Supply 3.1 Power Supply The power supply automatically switches to the 100-125 V ac range or to the 200-240 V ac range. The ac input is converted to dc outputs that supply the system with proper operating voltages.

  • Page 27: Reference Diskette

    IBM PS/2 Model 90 XP 486 HMR Reference Diskette 4.0 Reference Diskette There are two types of Model 90 Reference Diskettes. The type of processor board installed in the system determines which Reference Diskette is required. Note: For more information, see "Processor Board and Reference Diskette Matrix"...
  • Page 28 IBM PS/2 Model 90 XP 486 HMR Installing a New Version of the Reference Diskette 4.1 Installing a New Version of the Reference Diskette Note: When you install the new Reference Diskette onto the hard disk, it writes over all the files (including option files) in the system partition.
  • Page 29 IBM PS/2 Model 90 XP 486 HMR Making a Backup Copy of The System Partition 4.2 Making a Backup Copy of The System Partition Note: You will need a blank 2.0MB diskette (or the old backup copy of the system partition).
  • Page 30 IBM PS/2 Model 90 XP 486 HMR Diagnostic Programs and Information 4.3 Diagnostic Programs and Information See the Diagnostic Information for Micro Channel Computers pamphlet for information on the following: System Programs Selectable Startup Function POST Advanced Diagnostic Programs Presence Test...

  • Page 31: Specifications

    IBM PS/2 Model 90 XP 486 HMR Specifications 5.0 Specifications Size Width: 440 mm (17.3 in.) Depth: 430 mm (16.9 in.) Height: 140 mm (5.5 in.). Weight Minimum configuration: 12 kg (26 lb) Maximum configuration: 15 kg (33 lb). Environment...

  • Page 32: Special Tools

    The following special tools are required to service the system: Volt-Ohm Meter A meter similar to the Triplett Model 310. (1) Wrap Plug The Tri-Connector Wrap Plug (IBM part 72X8546) is used during advanced diagnostic tests of the parallel ports and the serial ports. PICTURE 4 Video-Memory Installation Tool The video memory insertion tool is used to install the video memory modules on the system board.

  • Page 33: Removals And Replacements

    IBM PS/2 Model 90 XP 486 HMR Removals and Replacements 7.0 Removals and Replacements The arrows in the removals and replacements procedures show the direction of movement to remove a field-replaceable unit (FRU), to turn a screw, or to press a tab to release the FRU.
  • Page 34 IBM PS/2 Model 90 XP 486 HMR 1005 Cover 7.1 1005 Cover PICTURE 8 ¦ Copyright IBM Corp. 1990, 1991 7.1 - 1...
  • Page 35 IBM PS/2 Model 90 XP 486 HMR 1010 Cover Lock 7.2 1010 Cover Lock Cover (1005) PICTURE 9 ¦ Copyright IBM Corp. 1990, 1991 7.2 - 1...
  • Page 36 IBM PS/2 Model 90 XP 486 HMR 1015 Fan / Air Baffle 7.3 1015 Fan / Air Baffle Cover (1005) Disconnect any cables necessary for removal. PICTURE 10 ¦ Copyright IBM Corp. 1990, 1991 7.3 - 1...
  • Page 37 IBM PS/2 Model 90 XP 486 HMR 1020 Power Switch / Speaker Assembly 7.4 1020 Power Switch / Speaker Assembly Cover (1005) Disconnect any cables necessary for removal. PICTURE 11 ¦ Copyright IBM Corp. 1990, 1991 7.4 - 1...
  • Page 38 IBM PS/2 Model 90 XP 486 HMR 1025 Diskette Drive 7.5 1025 Diskette Drive Cover (1005) Disconnect any cables necessary for removal. Warning: When you reinstall the drive, you must reinstall the clip on the diskette-drive cable. Note: Drives not designed for the Model 90 might cause intermittent problems.
  • Page 39 IBM PS/2 Model 90 XP 486 HMR 1030 Hard Disk Drive 7.6 1030 Hard Disk Drive Warning: Improper shipping and handling can result in permanent loss of all data and formatting on the hard disk drive. Have the user back up all information that is on the hard disk drive.
  • Page 40 IBM PS/2 Model 90 XP 486 HMR 1035 Adapters 7.7 1035 Adapters Note: When replacing the processor board, be sure to push the levers in toward the expansion slot until they lock into place. Cover (1005) Disconnect any cables necessary for removal.
  • Page 41 IBM PS/2 Model 90 XP 486 HMR 1040 487SX Processor (extended math capability) 7.8 1040 487SX Processor (extended math capability) Cover (1005) Disconnect any cables necessary for removal. Carefully insert the tip of a screwdriver between the processor and the connector edge and gently twist the screwdriver (around all edges) until the processor raises up.
  • Page 42 IBM PS/2 Model 90 XP 486 HMR 1045 Memory-Riser-Card Bracket 7.9 1045 Memory-Riser-Card Bracket Cover (1005) Disconnect any cables necessary for removal. PICTURE 16 ¦ Copyright IBM Corp. 1990, 1991 7.9 - 1...
  • Page 43 IBM PS/2 Model 90 XP 486 HMR 1050 Memory-Riser Card 7.10 1050 Memory-Riser Card Warning: The memory-riser cards are sensitive to static discharge. Maintain personal grounding by touching a ground point with one hand before handling this FRU. Note: When you add or remove memory, run the set configuration program from the hard disk drive.
  • Page 44 IBM PS/2 Model 90 XP 486 HMR 1055 Power Supply 7.11 1055 Power Supply Cover (1005) Memory-riser-card bracket (1045) Disconnect any cables necessary for removal. PICTURE 18 ¦ Copyright IBM Corp. 1990, 1991 7.11 - 1...
  • Page 45 IBM PS/2 Model 90 XP 486 HMR 1060 Battery 7.12 1060 Battery Cover (1005) Air baffle (1015) Adapters (1035) (from system-board slots J1, J3, J4, and J6). Disconnect any cables necessary for removal. CAUTION: The lithium battery presents a fire, explosion, or severe burn risk.
  • Page 46 IBM PS/2 Model 90 XP 486 HMR 1065 System Board 7.13 1065 System Board Cover (1005) Adapters (1035) Air baffle (1015) Memory-riser-card bracket (1045) Memory-riser cards (1050) Power supply (1055) Hard disk drives (1030). Disconnect any cables necessary for removal.
  • Page 47 IBM PS/2 Model 90 XP 486 HMR 1070 Video Memory 7.14 1070 Video Memory Note: See "System Board" in topic 8.5 for the location of the video memory on the system board. To replace video memory do the following: Place the video-memory installation tool 1 (supplied with the video-memory kit) over the video-memory socket.

  • Page 48: Locations

    IBM PS/2 Model 90 XP 486 HMR Locations 8.0 Locations Subtopics 8.1 Front View 8.2 Rear View 8.3 Interior View 8.4 Internal Cables 8.5 System Board 8.6 Processor Board ¦ Copyright IBM Corp. 1990, 1991 8.0 - 1...
  • Page 49 IBM PS/2 Model 90 XP 486 HMR Front View 8.1 Front View Power switch Hard-disk-drive in-use light Power-good light Diskette drive in-use light Diskette drive (Bay A) Diskette-eject button Bay B Serial number Bay D Bay C. PICTURE 22 ¦ Copyright IBM Corp. 1990, 1991...
  • Page 50 IBM PS/2 Model 90 XP 486 HMR Rear View 8.2 Rear View Keyboard connector Power-cord connector Pointing-device connector Parallel port Serial port (9-pin) Cover lock Serial port (25-pin) Video port Expansion slots SCSI Terminator Cover screws. PICTURE 23 ¦ Copyright IBM Corp. 1990, 1991...
  • Page 51 IBM PS/2 Model 90 XP 486 HMR Interior View 8.3 Interior View Diskette-drive-cable connector Processor board Expansion-slot covers Memory-riser-card bracket Hard-disk-drive-removal tool Power supply Power supply/system board cable-connector (P2) Power supply/system board cable-connector (P1) Power supply cable-connectors (P3 and P4)
  • Page 52 IBM PS/2 Model 90 XP 486 HMR Internal Cables 8.4 Internal Cables This diagram shows the arrangement of the cables that connect the various devices. Power supply Power supply cables SCSI-internal cable Hard-disk-drive power cable Hard disk drive Diskette drive...
  • Page 53 IBM PS/2 Model 90 XP 486 HMR System Board 8.5 System Board Power switch/speaker assembly (J2) Battery (BT1) SCSI adapter slot (J1) Adapter slots (J1, J3, J4, and J6) Processor-board slot (J8) Memory-riser-card slot (J11) Memory-riser-card slot (J14) Video-memory connectors...

  • Page 54: Processor Board

    IBM PS/2 Model 90 XP 486 HMR Processor Board 8.6 Processor Board Use the following information to locate the connectors and jumpers on the various processor boards, and to identify the purpose of those connectors and jumpers. Note: The locations may vary slightly.

  • Page 55: Grounds

    IBM PS/2 Model 90 XP 486 HMR Grounds 9.0 Grounds Screws Expansion-slot screws Chassis ground Safety ground. PICTURE 28 ¦ Copyright IBM Corp. 1990, 1991 9.0 - 1...

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