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 and 95 XP 486 HMR
FRONT
PICTURE 1
July 1992
Part Number 10G6475
Form Number S10G-6475-00
¦ Copyright IBM Corp. 1990, 1992
FRONT - 1

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Summary of Contents for IBM PS/2 90 XP 486

  • Page 1 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR FRONT PICTURE 1 July 1992 Part Number 10G6475 Form Number S10G-6475-00 ¦ Copyright IBM Corp. 1990, 1992 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: Notices

    Notices FRONT_1 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 and 95 XP 486 HMR Table of Contents CONTENTS Table of Contents EDITION Edition Notice FRONT_1 Notices CONTENTS Table of Contents Product Description (Model 90 XP 486) Product Description (Model 95 XP 486) Security 2.1.1...
  • Page 5 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Table of Contents 15.2 Rear View 15.3 Interior View 15.4 Internal Cables 15.5 System Board 16.0 Grounds 17.0 Removals and Replacements (Model 95 XP 486) 17.1 1005 Cover and Front Bezel 17.2...

  • Page 6: Product Description (Model 90 Xp 486)

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Product Description (Model 90 XP 486) 1.0 Product Description (Model 90 XP 486) The IBM (*) Personal System/2 (*) Model 90 XP 486 computers use the IBM Micro Channel (*) architecture. The features of the various types of the...

  • Page 7: Product Description (Model 95 Xp 486)

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Product Description (Model 95 XP 486) 2.0 Product Description (Model 95 XP 486) The IBM (*) Personal System/2 (*) Model 95 XP 486 computers use the IBM Micro Channel (*) architecture. The features of the various types of the...
  • Page 8 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Security 2.1 Security Subtopics 2.1.1 Cover Lock 2.1.2 Bolt-down Capability (Model 90) 2.1.3 Power-on Password ¦ Copyright IBM Corp. 1990, 1992 2.1 - 1...
  • Page 9 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Cover Lock 2.1.1 Cover Lock Model 90: the cover lock is in the middle of the rear panel of the system unit. The cover cannot be removed without the cover-lock key.
  • Page 10 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Bolt-down Capability (Model 90) 2.1.2 Bolt-down Capability (Model 90) 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 11 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Power-on Password 2.1.3 Power-on Password A power-on password denies access to the system by an unauthorized user when the system is powered-on. If 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.
  • Page 12 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Override Jumper 2.2 Override Jumper The override jumper J10 (Model 90) or J16 (Model 95) on the system board is most often used to erase a power-on password. However, the same jumper also has multiple purposes.
  • Page 13 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR System Features 2.3 System Features The major features of the system are: Processor board CMOS RAM Initial Machine Load (IML) Basic Input/Output System (BIOS) Power-on Self-Test (POST) Video (VGA and XGA) adapter...
  • Page 14 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Processor Boards 2.3.1 Processor Boards The functions of the system can be significantly changed depending on which processor board is installed. All processor boards plug into the system board through two dedicated in-line connectors.
  • Page 15 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR CMOS RAM and CMOS RAM Extension 2.3.2 CMOS RAM and CMOS RAM Extension CMOS RAM provides 64 bytes of storage. Fifty bytes are used to store system configuration and security information.
  • Page 16 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR IML, POST, and BIOS 2.3.3 IML, POST, and BIOS The systems use 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 17 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Video 2.3.4 Video On the Model 90, the video subsystem is on the system board. On the Model 95, the video subsystem is on the XGA Display Adapter/A. The video...
  • Page 18 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Serial Ports 2.3.5 Serial Ports The serial ports are fully programmable and support asynchronous communications. The 25-pin, D-shell connector provides the signals to drive a device with a standard 25-contact RS-232 connector.
  • Page 19 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Parallel Port 2.3.6 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 20 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Diskette-Drive Controller 2.3.7 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 21 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Keyboard Connector and Pointing-Device Connector 2.3.8 Keyboard Connector and Pointing-Device Connector The two 6-pin connectors on the rear of the system board are for a keyboard and a pointing device (mouse).
  • Page 22 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR System Memory 2.4 System Memory The figure below shows the location of the Model 90 four memory-module-kit connectors J4 to J1 on the memory-riser cards. The riser cards plug into system-board connectors J11 and J14.
  • Page 23 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Memory Requirements and Limitations 2.4.1 Memory Requirements and Limitations Whenever memory is added or removed from the system, run Automatic configuration from the Main Menu of the system programs.
  • Page 24 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Types of Memory Configurations 2.4.2 Types of Memory Configurations Interleaved configurations require matched pairs of memory-module kits (the size and the speed must be the same). The kits must be installed in the following order: pair J1 &...
  • Page 25 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Types of Error Detection 2.4.3 Types of Error Detection The systems use either parity or Error Correction Code (ECC) to detect memory errors (but not a combination of both).
  • Page 26 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Memory Errors 2.4.4 Memory Errors Type 1 Processor Boards: Systems with a type 1 processor board support only interleaved memory configurations. Only parity memory-module kits (70ns, 80ns, and 85ns) are supported.
  • Page 27 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Memory Errors ¦ 2MB ¦ 1MB ¦ ¦ 4MB ¦ 4MB ¦ ¦ 8MB ¦ 4MB ¦ ¦ ¦ ¦ +------------------------------------------------------------------------+ Note: If a system with only one 2MB kit or one 4MB kit installed detects a memory failure, the system memory diagnostic cannot reconfigure the system to disable the failing memory.
  • Page 28 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Resolving Memory-Address Conflicts 2.5 Resolving Memory-Address Conflicts The automatic configuration program might change the memory-address space used by some hardware and software options. The new address might conflict with addresses defined for use through the expanded memory specification (EMS).
  • Page 29 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Changing the Software Configuration 2.5.1 Changing the Software Configuration The best method of resolving memory-address conflicts is to change the software configuration by changing the addresses defined by the EMS driver.
  • Page 30 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Changing the System Configuration 2.5.2 Changing the System Configuration An alternate method of resolving memory-address conflicts is to change the address of the conflicting hardware option by using Change configuration from the Set configuration program.

  • Page 31: Example: Default Startup Sequence

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Selectable Drive-Startup Sequence 2.6 Selectable Drive-Startup Sequence The selectable drive-startup sequence allows the user to control the startup sequence of the drives in the system. Each time the system is powered-on, it checks the drives as it looks for the operating system.
  • Page 32 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Example: Default Startup Sequence 2.6.1 Example: Default Startup Sequence The example below shows the default startup sequence for the system. Startup Number Device 1....[2.88MB 3.5-inch Diskette Drive 0] 2....[SCSI hard disk slot 1 (ID, LUN)...:6,0] 3....[Not selected]...
  • Page 33 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Example: Changing the Startup Sequence 2.6.2 Example: Changing the Startup Sequence Assume the following drives are installed in the system: Diskette Drives 3.5-inch diskette drive (primary diskette drive) 3.5-inch diskette drive (second diskette drive) 5.25-inch diskette drive (third diskette drive)

  • Page 34: Option Compatibility

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Option Compatibility 3.0 Option Compatibility The systems support many of the 16-bit and 32-bit adapters that are designed for IBM Personal System/2 Micro Channel architecture computers. On the Model 90, most adapters can be plugged into any of the four expansion slots.
  • Page 35 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Drive and Diskette Compatibility 3.1 Drive and Diskette Compatibility The following provides information concerning the identification of diskette drives. +------------------------------------------------------------------------+ ¦ Diskette Drive ¦ Identifying Mark ¦ +------------------------------------+-----------------------------------¦ +------------------------------------+-----------------------------------¦...
  • Page 36 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR SCSI Hard Disk Drives and Devices 3.2 SCSI Hard Disk Drives and Devices The systems are shipped with at least one Small Computer System Interface (SCSI) hard disk drive and a SCSI adapter.
  • Page 37 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR SCSI ID Numbers 3.3 SCSI ID Numbers Each SCSI device connected to a SCSI adapter must be assigned, at the time of installation, a unique SCSI identification number (SCSI ID).
  • Page 38 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Selecting a SCSI ID Priority 3.3.1 Selecting a SCSI ID Priority The SCSI ID (6, 5, 4, 3, 2, 1, or 0) available for a device depends on which IDs are already assigned to devices in the same SCSI chain.
  • Page 39 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Determining the SCSI ID of an existing device 3.3.2 Determining the SCSI ID of an existing device At the time of installation, a SCSI device should be labeled indicating the SCSI ID assigned to that device.
  • Page 40 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Setting the SCSI ID 3.3.3 Setting the SCSI ID SCSI devices have either switches or jumpers to set the SCSI ID. All FRU hard disk drives are shipped preset to SCSI ID 6.
  • Page 41 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Motor-Start Jumper 3.3.4 Motor-Start Jumper The jumper in position (illustrated above) is the motor-start jumper. If the jumper is in place, the hard disk drive motor starts instantly when you power-on the system.

  • Page 42: Scsi Device Cabling And Terminators

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Terminators 3.4 Terminators Even though the system can appear to be operating correctly with or without terminators installed, it is not actually operating correctly. The SCSI bus can operate at data rates up to 5MB per second.
  • Page 43 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR SCSI Device Cabling and Terminators 3.4.1 SCSI Device Cabling and Terminators Internal SCSI Devices: Internal SCSI devices attach to a SCSI adapter through a flat ribbon cable 1 .
  • Page 44 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR SCSI Adapter Terminators 3.4.2 SCSI Adapter Terminators Adapter terminator requirements and locations vary depending on the following: Type of SCSI Adapter Installed: The type 1 SCSI adapter has a connector 1 (on one side) for a 20-pin terminator.

  • Page 45: Operating Requirements

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Operating Requirements 4.0 Operating Requirements This section describes the operations that occur from the time the system is powered-on until the minimum operating requirements have been met. Subtopics 4.1 Power Supply ¦...

  • Page 46: Power Supply

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Power Supply 4.1 Power Supply On the Model 90, the power supply automatically switches to the 100-125 V ac range or to the 200-240 V ac range. On the Model 95, the power supply can be manually switched to support either the 100-125 V ac range or 200-240 V ac range.

  • Page 47: System Diskettes (Reference And Diagnostic)

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR System Diskettes (Reference and Diagnostic) 5.0 System Diskettes (Reference and Diagnostic) If the hard disk drive is not operational, you can run the system programs from the System Diskettes (Reference Diskette and the Diagnostic Diskette).

  • Page 48: Updating The Iml Image (System Diskettes)

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Updating the IML Image (System Diskettes) 6.0 Updating the IML Image (System Diskettes) When you install the new System Diskettes onto the hard disk, they write over all existing files (including option files) in the System Partition.
  • Page 49 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Installation Requirements 6.1 Installation Requirements Warning: The power-on password must be removed prior to installing the new IML code. Notes: Before you install the new version of the System Diskettes, tell the customer that the installation takes up to one hour.
  • Page 50 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Backing Up the Current System Partition 6.2 Backing Up the Current System Partition In this step, you will be saving any customized configuration information on the System Partition. Note: This procedure saves a customized configuration (1).
  • Page 51 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Backing Up the Current System Partition Version level of the system programs (found on the system program logo screen) (1) Customized configuration: A system configuration that users create using the change configuration feature of the system programs.
  • Page 52 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Installing a New Version of the Reference Diskette 6.3 Installing a New Version of the Reference Diskette In this step, you will be loading the new initial machine load image (IML), and Diagnostic code onto the System Partition.
  • Page 53 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Installing a New Version of the Reference Diskette Select Set configuration, and then View configuration. Make sure all settings are correct, and make any changes necessary. When you are done, return to the Main Menu of the system programs.
  • Page 54 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Making a New Backup Copy of the System Partition 6.4 Making a New Backup Copy of the System Partition Note: You will need two blank 2.0MB diskettes (or the old backup copy of the System Partition).

  • Page 55: Using Ascii Terminals (Model 95 Xp 486)

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Using ASCII Terminals (Model 95 XP 486) 7.0 Using ASCII Terminals (Model 95 XP 486) The Model 95 supports the following ASCII display stations, when attached to the system board serial connector: 3151, 3161, 3162, 3163, and 3164.
  • Page 56 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR ASCII Terminal Setup and Menu Selection 7.1 ASCII Terminal Setup and Menu Selection Use the setup instructions supplied with the ASCII terminal. As you are using those instructions, you will need to know the following information:...

  • Page 57: Console Selection

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR ASCII Terminal Configuration 7.2 ASCII Terminal Configuration When using an ASCII terminal, you must define the setup values so that the display station can correctly communicate with the system.
  • Page 58 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Console Selection 7.2.1 Console Selection The Model 95 has a Set Console utility program that lets you tell the system you are using an ASCII terminal. Without the Set Console utility program, the system will use the default values shown.
  • Page 59 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Error Messages 7.2.2 Error Messages If you get a 161 or 173 error during POST, the selection you made in the Set Console utility program is no longer valid.
  • Page 60 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Operations 7.2.3 Operations Some of the ASCII terminal operations are listed below. Communication When using an ASCII terminal, the communication parameters will appear on the information panel (for example 96-8N1).

  • Page 61: System Error Log

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR System Error Log 8.0 System Error Log Systems with a 50 Mhz type 3 processor board (submodel code 28 or 29) maintain a system error log. On these systems, the BIOS nonmaskable interrupt (NMI) handler writes an entry to the error log each time an error is detected.
  • Page 62 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Viewing the Error Log 8.1 Viewing the Error Log To view the error log, start the system programs and select More utilities from the Main Menu, then select Display system error log.
  • Page 63 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Types of Errors Detected 8.2 Types of Errors Detected The error log can contain many different types of hardware or application-program related errors. The most probable cause of the failure is always indicated on the help screen.
  • Page 64 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Error Storage 8.3 Error Storage The error log stores up to three unique errors (for example three parity errors at three different addresses). The multiple log counter (on the screen) displays the number of additional times each unique error occurred.
  • Page 65 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Application 8.4 Application If the system does not display a POST error, (or if diagnostics run error-free) but you still suspect a problem, look at the error log. errors are detected, they are displayed.
  • Page 66 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Dumping Extended Diagnostic Data Information 8.5 Dumping Extended Diagnostic Data Information In cases where the system appears to have an undetectable intermittent failure, analyzing the extended data information will help find the cause of the failure.

  • Page 67: Miscellaneous System-Related Information

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Miscellaneous System-Related Information 9.0 Miscellaneous System-Related Information This section contains miscellaneous system-related system information that will aid you in trouble shooting. PS/2 Displays: If you experience problems with a PS/2 (*) display, and...

  • Page 68: Specifications (Model 90 Xp 486)

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Specifications (Model 90 XP 486) 10.0 Specifications (Model 90 XP 486) Size Height: 140 mm (5.5 in.) Depth: 430 mm (16.9 in.) Width: 440 mm (17.3 in.) Weight Minimum configuration:...

  • Page 69: Specifications (Model 95 Xp 486)

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Specifications (Model 95 XP 486) 11.0 Specifications (Model 95 XP 486) Size Height: 501 mm (19.75 in.) Depth: 508 mm (20.0 in.) Width: 203 mm (8.0 in.) Weight Minimum configuration:...

  • Page 70: Special Tools

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Special Tools 12.0 Special Tools The following special tools are required to service the systems: Wrap Plug Use the Tri-Connector Wrap Plug during advanced diagnostic tests of the parallel and serial ports.

  • Page 71: Handling Electro-Static Discharge (Esd) Sensitive Devices

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Handling Electro-Static Discharge (ESD) Sensitive Devices 13.0 Handling Electro-Static Discharge (ESD) Sensitive Devices These are general instructions for handling ESD sensitive parts. Any part containing transistors or ICs should be considered ESD Sensitive.

  • Page 72: Removals And Replacements (Model 90 Xp 486)

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Removals and Replacements (Model 90 XP 486) 14.0 Removals and Replacements (Model 90 XP 486) The arrows in the removal and replacement procedures show the direction to remove a field replaceable unit (FRU), or the direction to turn a screw, or to press a tab to release the FRU.
  • Page 73 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1005 Cover 14.1 1005 Cover PICTURE 13 ¦ Copyright IBM Corp. 1990, 1992 14.1 - 1...
  • Page 74 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1010 Cover Lock 14.2 1010 Cover Lock Cover (1005) PICTURE 14 ¦ Copyright IBM Corp. 1990, 1992 14.2 - 1...
  • Page 75 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1015 Fan / Air Baffle 14.3 1015 Fan / Air Baffle Cover (1005) Disconnect any cables necessary for removal. Note: If the replacement fan is larger than the fan installed, replace the card-guide structure that is supplied with the larger fan FRU.
  • Page 76 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1020 Power Switch / Speaker Assembly 14.4 1020 Power Switch / Speaker Assembly Cover (1005) Disconnect any cables necessary for removal. PICTURE 16 ¦ Copyright IBM Corp. 1990, 1992...
  • Page 77 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1025 Diskette Drive 14.5 1025 Diskette Drive Cover (1005) Disconnect any cables necessary for removal. Warning: The clip on the diskette-drive cable reduces noise on the cable. Be sure that it is replaced after service.
  • Page 78 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1030 Hard Disk Drive 14.6 1030 Hard Disk Drive Cover (1005) Disconnect any cables necessary for removal. Notes: The last drive on the cable requires a terminator. See "Internal Cables"...
  • Page 79 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1035 Adapters 14.7 1035 Adapters Cover (1005) Disconnect any cables necessary for removal. Note: Before you replace an adapter, note the slot location on the system board. Put the replacement adapter into that slot.
  • Page 80 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1040 Option Processor 14.8 1040 Option Processor You can install an optional processor on a 20 or 25 MHz processor board. On the 20-MHz board (below left), the jumper...
  • Page 81 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1045 Memory Riser Card Bracket 14.9 1045 Memory Riser Card Bracket Cover (1005) Disconnect any cables necessary for removal. PICTURE 21 ¦ Copyright IBM Corp. 1990, 1992 14.9 - 1...
  • Page 82 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1050 Memory Riser Card 14.10 1050 Memory Riser Card Cover (1005) Memory-riser-card bracket (1045). Disconnect any cables necessary for removal. Notes: If memory is added or removed, run Automatic configuration from the hard disk drive.
  • Page 83 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1055 Power Supply 14.11 1055 Power Supply Cover (1005) Memory-riser-card bracket (1045) Disconnect any cables necessary for removal. PICTURE 23 ¦ Copyright IBM Corp. 1990, 1992 14.11 - 1...

  • Page 84: 1060 Battery

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1060 Battery 14.12 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 85: 1065 System Board

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1065 System Board 14.13 1065 System Board Cover (1005) Air baffle (1015) Hard disk drives (1030) Adapters (1035) Memory-riser-card bracket (1045) Memory-riser cards (1050) Power supply (1055) Disconnect any cables necessary for removal.

  • Page 86: 1070 Video Memory

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1070 Video Memory 14.14 1070 Video Memory Note: See "System Board" in topic 15.5 for the location of the video memory on the system board. To replace video memory do the following:...

  • Page 87: Locations

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Locations 15.0 Locations Subtopics 15.1 Front View 15.2 Rear View 15.3 Interior View 15.4 Internal Cables 15.5 System Board ¦ Copyright IBM Corp. 1990, 1992 15.0 - 1...

  • Page 88: Front View

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Front View 15.1 Front View Power switch Hard-disk-drive in-use light Power-on light Diskette drive in-use light Diskette drive (bay 0) Diskette-eject button Option SCSI or non-SCSI device (bay 1)

  • Page 89: Rear View

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Rear View 15.2 Rear View Keyboard connector Power-cord connector Pointing-device connector Parallel-port connector Serial-port connector (9-pin) Cover lock Serial-port connector (25-pin) Video port Expansion slots SCSI terminator Cover screws.

  • Page 90: Interior View

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Interior View 15.3 Interior View Diskette-drive-cable connector Processor board Expansion-slot covers Memory-riser-card bracket Power supply Power-supply cable (P2) Power-supply cable (P1) Power-supply cable (P3 and P4) SCSI internal cable Memory riser cards (J11 &...

  • Page 91: Internal Cables

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Internal Cables 15.4 Internal Cables This diagram shows the arrangement of the cables that connect the various devices. Power supply Power-supply cables SCSI internal cable (signal) SCSI device power cables...

  • Page 92: System Board

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR System Board 15.5 System Board Power switch/speaker assembly (J2) Battery (BT1) Adapter slots Processor-board slot (J8) Memory-riser-card slot (J11) Video port Serial port (25-pin) Serial port (9-pin) Diskette-drive-cable connector (J15)

  • Page 93: Grounds

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Grounds 16.0 Grounds Screws Expansion-slot screws Chassis ground Safety ground. PICTURE 32 ¦ Copyright IBM Corp. 1990, 1992 16.0 - 1...

  • Page 94: Removals And Replacements (Model 95 Xp 486)

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Removals and Replacements (Model 95 XP 486) 17.0 Removals and Replacements (Model 95 XP 486) The recommended service position of the Model 95 is upright. necessary, you may place the system on its left side for servicing.
  • Page 95 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1005 Cover and Front Bezel 17.1 1005 Cover and Front Bezel PICTURE 33 ¦ Copyright IBM Corp. 1990, 1992 17.1 - 1...
  • Page 96 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1010 Cover Lock 17.2 1010 Cover Lock Cover and Front Bezel (1005) PICTURE 34 ¦ Copyright IBM Corp. 1990, 1992 17.2 - 1...
  • Page 97 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1015 Drive Retainer and Bezels 17.3 1015 Drive Retainer and Bezels Cover and Front Bezel (1005) PICTURE 35 ¦ Copyright IBM Corp. 1990, 1992 17.3 - 1...
  • Page 98 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1020 Information Panel Assembly 17.4 1020 Information Panel Assembly Cover and Front Bezel (1005) Drive Retainer and Bezels (1015) Disconnect any cables necessary for removal. PICTURE 36 ¦ Copyright IBM Corp. 1990, 1992...
  • Page 99 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1025 Diskette Drive 17.5 1025 Diskette Drive Cover and Front Bezel (1005) Drive Retainer and Bezels (1015) Disconnect any cables necessary for removal. Notes: Drives not designed for the Model 95 might cause intermittent problems.
  • Page 100 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1030 Hard Disk Drive 17.6 1030 Hard Disk Drive Cover and Front Bezel (1005) Drive Retainer and Bezels (1015) Disconnect any cables necessary for removal. Notes: The last drive on the cable requires a terminator.
  • Page 101 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1035 Option Hardware Trays 17.7 1035 Option Hardware Trays Cover and Front Bezel (1005) Drive Retainer and Bezels (1015). The option hardware trays contain cables and rails needed to install option devices.
  • Page 102 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1040 Adapters and Adapter Guide 17.8 1040 Adapters and Adapter Guide Cover and Front Bezel (1005) Note: Before you replace an adapter, note the slot location on the system board.
  • Page 103 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1045 Option Processor 17.9 1045 Option Processor You can install an optional processor on a 20 or 25 MHz processor board. On the 20-MHz board (below left), the jumper must be in positions 1 and 2 if a 487SX processor is installed in connector 3 .
  • Page 104 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1050 Power Supply 17.10 1050 Power Supply Cover and Front Bezel (1005) Disconnect any cables necessary for removal. PICTURE 42 ¦ Copyright IBM Corp. 1990, 1992 17.10 - 1...
  • Page 105 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1055 Memory Module Kit 17.11 1055 Memory Module Kit Cover and Front Bezel (1005) Power Supply (1050) (Steps only) Notes: If memory is added or removed, run Automatic configuration from the hard disk drive.

  • Page 106: 1060 Battery

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1060 Battery 17.12 1060 Battery Cover and Front Bezel (1005) Power Supply (1050). CAUTION: The lithium battery presents a fire, explosion, or severe burn risk. not recharge it, disassemble it, heat it above 100°C (212°F), incinerate it, or expose its cell contents to water.

  • Page 107: 1065 System Board

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1065 System Board 17.13 1065 System Board Cover and Front Bezel (1005) Adapters and Adapter Guide (1040) Power Supply (1050) Hard Disk Drives (1030) (if necessary) Disconnect any cables necessary for removal.

  • Page 108: 1070 Adapter Retainer And Ground Assembly

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1070 Adapter Retainer and Ground Assembly 17.14 1070 Adapter Retainer and Ground Assembly Cover and Front Bezel (1005) Adapters and Adapter Guide (1040) Power Supply (1050) System Board (1065) Disconnect any cables necessary for removal.

  • Page 109: 1075 Rear Bezel

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1075 Rear Bezel 17.15 1075 Rear Bezel Cover and Front Bezel (1005) Adapters (1040) Power Supply (1050) System Board (1065) Disconnect any cables necessary for removal. Note: Carefully loosen and remove the expansion slot covers before removing the rear bezel.

  • Page 110: 1080 Drive Support Structure

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1080 Drive Support Structure 17.16 1080 Drive Support Structure Warning: As you remove or replace the drive support structure, be careful not to bend the ground spring. A damaged ground spring can result in intermittent noise problems.

  • Page 111: 1085 Access Cover Fan

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1085 Access Cover Fan 17.17 1085 Access Cover Fan The access cover fan is on the inside of the system access cover. Cover and Front Bezel (1005) PICTURE 49 ¦...

  • Page 112: 1090 Access Cover Fan Cable

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1090 Access Cover Fan Cable 17.18 1090 Access Cover Fan Cable Cover and Front Bezel (1005) Power Supply (1050) Disconnect the fan cable from connector J28 on the system board.

  • Page 113: 1095 Pedestal

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR 1095 Pedestal 17.19 1095 Pedestal Note: Pull out on the tabs just far enough to release the pedestal. PICTURE 51 ¦ Copyright IBM Corp. 1990, 1992 17.19 - 1...

  • Page 114: Locations

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Locations 18.0 Locations Subtopics 18.1 Front View 18.2 Rear View 18.3 Interior View 18.4 Internal Cables 18.5 System Board ¦ Copyright IBM Corp. 1990, 1992 18.0 - 1...

  • Page 115: Front View

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Front View 18.1 Front View Power switch Power-on light Information panel Type, model and serial number Diskette drive (bay 0) Diskette drive in-use light Diskette-eject button Option diskette drive (bay 1)

  • Page 116: Rear View

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Rear View 18.2 Rear View Expansion slots Serial port Parallel port Pointing-device connector Keyboard connector Power-cord connector Type, model and serial number Voltage-select switch. PICTURE 53 ¦ Copyright IBM Corp. 1990, 1992...

  • Page 117: Interior View

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Interior View 18.3 Interior View SCSI device internal cable SCSI adapter Adapter retainer and ground assembly Processor board Access cover fan cable System board Power supply Internal SCSI Device power cable...

  • Page 118: Internal Cables

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Internal Cables 18.4 Internal Cables This diagram shows the arrangement of the cables that connect the various devices. Information-panel cable External SCSI device cable connector System board Access Cover Fan...

  • Page 119: System Board

    IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR System Board 18.5 System Board 32-bit expansion slots (video extensions J9, J11) Processor-board slot Serial port Parallel port Access cover fan connector (J28) Pointing-device connector Keyboard connector Memory-module connectors...
  • Page 120 IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR Grounds 19.0 Grounds Screws Expansion slot screws Chassis ground Primary ground Power-cord connector. PICTURE 57 ¦ Copyright IBM Corp. 1990, 1992 19.0 - 1...

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Ps/2 95 xp 486

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