IBM PS/2 65 SX Hardware Maintenance Reference
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IBM PS/2 65 SX Hardware Maintenance Reference

IBM PS/2 65 SX Hardware Maintenance Reference

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IBM PS/2 Model 65 SX HMR
FRONT
PICTURE 1
March 21, 1990
Part Number 64F3992
Form Number S64F-3992-00
FRONT - 1

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  • Page 1 IBM PS/2 Model 65 SX HMR FRONT PICTURE 1 March 21, 1990 Part Number 64F3992 Form Number S64F-3992-00 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 IBM PS/2 Model 65 SX 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 Power-On Password System-Board Features 1.2.1 Microprocessor 1.2.2 CMOS RAM 1.2.3 CMOS RAM Extension 1.2.4...

  • Page 5: Product Description

    IBM PS/2 Model 65 SX HMR Product Description 1.0 Product Description |The IBM (*) Personal System/2 (*) Model 65 SX computers use the IBM Micro |Channel (*) architecture. The features of the various types of Model 65 |SX are: Security:...
  • Page 6 IBM PS/2 Model 65 SX HMR Security 1.1 Security Subtopics 1.1.1 Cover Lock 1.1.2 Power-On Password 1.1 - 1...

  • Page 7: Cover Lock

    IBM PS/2 Model 65 SX HMR Cover Lock 1.1.1 Cover Lock The cover lock is on the left side of the system unit and can be unlocked with the user's 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 pamphlet for the model you are servicing).

  • Page 8: Power-On Password

    IBM PS/2 Model 65 SX HMR Power-On Password 1.1.2 Power-On Password A power-on password denies access to the system when the system is powered-on. To service a system with an active and unknown power-on password, use the following procedure: Turn off the system unit and all attached options (such as the display and printer).

  • Page 9: System Board Features

    IBM PS/2 Model 65 SX HMR System-Board Features 1.2 System-Board Features |The major features of the system board are: 80386SX Microprocessor CMOS RAM CMOS RAM Extension ROM BIOS Serial port Parallel port Diskette-drive controller Keyboard connector Pointing-device connector. Subtopics 1.2.1 Microprocessor 1.2.2 CMOS RAM...
  • Page 10 IBM PS/2 Model 65 SX HMR Microprocessor 1.2.1 Microprocessor |The microprocessor interprets and carries out instructions. The 80386SX |Microprocessor is a 32-bit processor with a 16-bit external data bus and |operates in two modes: real-address mode and virtual-address (protected) |mode.
  • Page 11 IBM PS/2 Model 65 SX HMR CMOS RAM 1.2.2 CMOS RAM |The CMOS RAM provides 64 bytes of storage. The first 50 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 12 IBM PS/2 Model 65 SX HMR CMOS RAM Extension |1.2.3 CMOS RAM Extension |A 2KB (KB = 1024 bytes) CMOS RAM extension stores additional configuration |and system-status information. The data stored in the CMOS RAM extension |is kept active by a built-in battery when the system is powered-off.
  • Page 13 IBM PS/2 Model 65 SX HMR ROM BIOS 1.2.4 ROM BIOS |ROM BIOS contains the instructions and routines that control the keyboard, |diskette drives, fixed disk drive, displays, and other major input/output |devices in the system. Some adapters have their own ROM modules |containing extended BIOS routines that work with the system-board ROM |BIOS.
  • Page 14 IBM PS/2 Model 65 SX HMR 1.2.5 VGA |The VGA is a graphics controller on the system board. The VGA supports |color and monochrome analog direct-drive displays in a variety of modes, |including alphanumeric text mode, and all-points-addressable (APA) |graphics mode.

  • Page 15: Serial Port

    IBM PS/2 Model 65 SX HMR Serial Port 1.2.6 Serial Port The serial port is fully programmable and supports asynchronous communications. The 25-pin, D-shell connector provides the signals to drive a device with a standard 25-contact, RS-232 connector. connected device is identified by the system configuration as either SERIAL 1 or SERIAL 2.

  • Page 16: Parallel Port

    IBM PS/2 Model 65 SX HMR Parallel Port 1.2.7 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: Diskette Drive Controller

    |The controller connects to the diskette drives through a single 40-pin |connector on the system board. Signals and voltages are supplied through |the diskette-drive cable that plugs into the connector. These signals and |voltages can operate two IBM 3.5-inch diskette drives. 1.2.8 - 1...
  • Page 18 IBM PS/2 Model 65 SX HMR Keyboard Connector and Pointing-Device Connector 1.2.9 Keyboard Connector and Pointing-Device Connector |The two 6-pin connectors at the rear of the system board are for |connecting a keyboard and a pointing device (mouse). The keyboard |connector is marked with a small keyboard figure molded into the back |panel;...
  • Page 19 IBM PS/2 Model 65 SX HMR Option Compatibility 2.0 Option Compatibility The &mod65. uses some adapters designed for Models 50, 60, 70, and 80 computers. For more information, see the parts section in the Hardware Maintenance Service pamphlet for the model you are servicing.
  • Page 20 ¦ 2.0MB ¦ Not Compatible ¦ Read/Write ¦ +------------+------------------+-------------¦ ¦ ¦ ¦ ¦ +---------------------------------------------+ Note: For additional information, see "Diskette Drives and Diskettes" in the IBM Personal System/2 Hardware Maintenance Reference General Information pamphlet in this manual. 2.1 - 1...

  • Page 21: Fixed Disk Drives

    IBM PS/2 Model 65 SX HMR Fixed Disk Drives 2.2 Fixed Disk Drives |Model 65 SX systems are shipped with a Small Computer System Interface |(SCSI) fixed disk drive and adapter. The fixed disk drive and |fixed-disk-drive interface must be the same.
  • Page 22 IBM PS/2 Model 65 SX HMR Terminators |2.3 Terminators |Diskette Drives: do not use or require terminators. |Fixed Disk Drives: one or more cables are used to connect the fixed-disk |adapters to the fixed disk drives. For each cable used, the last drive on |the cable must have a terminator.

  • Page 23: Operating Requirements

    IBM PS/2 Model 65 SX 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 have been met. Subtopics 3.1 Power Supply 3.2 Power-On Self-Test (POST) 3.3 System Memory...

  • Page 24: Power Supply

    IBM PS/2 Model 65 SX HMR Power Supply |3.1 Power Supply |The power supply automatically switches to either the 100-125 Vac or the |200-240 Vac range. The ac input is converted to dc outputs that supply |the system with proper operating voltages.

  • Page 25: Power-On Self-Test (Post)

    |icon indicates that a diskette should be inserted into drive A. After the |diskette is inserted, press the F1 key to resume operation. If the F1 key |is pressed when no diskette is in the diskette drive, the IBM Cassette |BASIC screen appears. 3.2 - 1...

  • Page 26: System Memory

    IBM PS/2 Model 65 SX HMR System Memory 3.3 System Memory Subtopics 3.3.1 System-Board Memory 3.3.2 Memory-Expansion Adapters 3.3.3 Memory Requirements and Limitations 3.3.4 Memory Errors 3.3 - 1...

  • Page 27: System-Board Memory

    IBM PS/2 Model 65 SX HMR System-Board Memory 3.3.1 System-Board Memory The Model 65 SX has at least 2MB of memory installed at the time of shipment. An additional memory-module kit can be installed in the second memory-module connector on the system board.
  • Page 28 IBM PS/2 Model 65 SX HMR Memory-Expansion Adapters 3.3.2 Memory-Expansion Adapters Memory-expansion adapters can be installed in any 16-bit expansion slot. 3.3.2 - 1...
  • Page 29 IBM PS/2 Model 65 SX HMR Memory Requirements and Limitations 3.3.3 Memory Requirements and Limitations The system board does not have to be fully populated before memory-expansion adapters can be installed, and a memory-expansion adapter does not have to filled to capacity before another memory-expansion adapter can be installed.

  • Page 30: Memory Errors

    IBM PS/2 Model 65 SX HMR Memory Errors 3.3.4 Memory Errors The Model 65 SX reallocates system-board memory in 1MB blocks. If the POST detects a memory error in the first 1MB of system-board memory, the entire 1MB of memory is deactivated and an error code is displayed.

  • Page 31: Specifications

    IBM PS/2 Model 65 SX HMR Specifications 4.0 Specifications Size Depth: mm (19 in.) Height: 597 mm (23.5 in.) Width: 165 mm (6.5 in.) Width (feet extended): 318 mm (12.5 in.). Weight Minimum configuration: 21 kg (46 lb) Maximum configuration: 26 kg (58 lb).

  • Page 32: Special Tools

    IBM PS/2 Model 65 SX HMR Special Tools 5.0 Special Tools The following special tools are required to service the Model 65 SX. Subtopics 5.1 Volt-Ohm Meter 5.2 Wrap Plug 5.0 - 1...
  • Page 33 IBM PS/2 Model 65 SX HMR Volt-Ohm Meter 5.1 Volt-Ohm Meter A meter similar to the Triplett Model 310. (1) (1) Manufactured by Triplett Corporation, Bluffton, Ohio 45817, U.S.A. 5.1 - 1...
  • Page 34 IBM PS/2 Model 65 SX HMR Wrap Plug 5.2 Wrap Plug |The Tri-Connector wrap plug (IBM part 72X8546) is used during the advanced |diagnostic tests of the serial and parallel ports. |The Tri-Connector wrap plug replaces the following: (IBM part 8529228) Printer Adapter wrap plug...

  • Page 35: Service Position

    IBM PS/2 Model 65 SX HMR Service Position 6.0 Service Position |The Model 65 SX should be upright when being serviced. If necessary, the |unit can be placed on the side without the cover after the feet have been |folded.

  • Page 36: Removals And Replacements

    IBM PS/2 Model 65 SX HMR Removals and Replacements 7.0 Removals and Replacements |The arrows in the removals and replacements show the direction of movement |to remove a FRU, to turn a screw, or to press a tab to release the FRU.
  • Page 37 IBM PS/2 Model 65 SX HMR 1005 Cover 7.1 1005 Cover CAUTION: Before removing any FRU, power off the system, unplug all power cords from electrical outlets, and disconnect any interconnecting cables. PICTURE 4 7.1 - 1...
  • Page 38 IBM PS/2 Model 65 SX HMR 1010 Cover Lock 7.2 1010 Cover Lock Cover (1005) PICTURE 5 7.2 - 1...
  • Page 39 IBM PS/2 Model 65 SX HMR 1015 Adapters 7.3 1015 Adapters Cover (1005) Disconnect any cables attached to the adapter. |Note: Before replacing an adapter, note the locations of the adapter and cables. When replacing an adapter, install the replacement adapter in the same slot as the adapter that was removed.
  • Page 40 IBM PS/2 Model 65 SX HMR 1020 Math Coprocessor 7.4 1020 Math Coprocessor Cover (1005) Remove adapters (1015) that are in the way. Warning: Remove the math coprocessor carefully. Do not bend the pins when removing the math coprocessor. The math coprocessor can be damaged by electrostatic discharge, prying between the module and connector, or prying between the connector and system board.
  • Page 41 IBM PS/2 Model 65 SX HMR 1025 Speaker Assembly 7.5 1025 Speaker Assembly Cover (1005) PICTURE 8 7.5 - 1...
  • Page 42 IBM PS/2 Model 65 SX HMR 1030 Feet 7.6 1030 Feet Cover (1005) Remove any adapters (1015) that are in the way. PICTURE 9 7.6 - 1...
  • Page 43 IBM PS/2 Model 65 SX HMR 1035 Front Bezel 7.7 1035 Front Bezel PICTURE 10 7.7 - 1...
  • Page 44 IBM PS/2 Model 65 SX HMR 1040 Carrying Handle 7.8 1040 Carrying Handle Front bezel (1035) PICTURE 11 7.8 - 1...
  • Page 45 IBM PS/2 Model 65 SX HMR 1045 Power Supply 7.9 1045 Power Supply Cover (1005) Front bezel (1035). Note: Disconnect all cables from the power supply. PICTURE 12 7.9 - 1...
  • Page 46 IBM PS/2 Model 65 SX HMR 1050 Diskette Drive 7.10 1050 Diskette Drive Cover (1005) Front bezel (1035). Note: Some models require that you unplug the diskette-drive cable before removing the drive. PICTURE 13 7.10 - 1...
  • Page 47 IBM PS/2 Model 65 SX HMR 1055 Diskette Drive Support Structure 7.11 1055 Diskette Drive Support Structure Cover (1005) Front bezel (1035) Diskette drive (1050). PICTURE 14 7.11 - 1...
  • Page 48 IBM PS/2 Model 65 SX HMR 1060 Fixed Disk Drive (Front Bay) 7.12 1060 Fixed Disk Drive (Front Bay) Warning: Improper shipping and handling can result in permanent loss of all data and formatting on the fixed disk drive. Have the user back up all information from the fixed disk drive.
  • Page 49 IBM PS/2 Model 65 SX HMR 1065 Fixed Disk Drive (Rear Bay) 7.13 1065 Fixed Disk Drive (Rear Bay) Warning: Improper shipping and handling can result in permanent loss of all data and formatting on the fixed disk drive. Have the user back up all information from the fixed disk drive.
  • Page 50 IBM PS/2 Model 65 SX HMR 1070 Fixed Disk Drive Bracket 7.14 1070 Fixed Disk Drive Bracket Notes: Some systems may have one or two fixed disk drives mounted in a bracket. Remove the fixed disk drive cable from the cable strap if necessary.
  • Page 51 IBM PS/2 Model 65 SX HMR 1075 Fixed Disk Drive Support Structure 7.15 1075 Fixed Disk Drive Support Structure Cover (1005) Fixed disk drive (front bay), if installed (1060) Fixed disk drive (rear bay) (1065). PICTURE 18 7.15 - 1...
  • Page 52 IBM PS/2 Model 65 SX HMR 1080 Memory-Module Kits 7.16 1080 Memory-Module Kits Cover (1005) Fixed disk drive (front bay), if installed (1060) Fixed disk drive (rear bay), if removing the kit in the left connector (1065) Fixed disk drive support structure, if removing the kit in the left connector (1075).
  • Page 53 IBM PS/2 Model 65 SX HMR 1085 System Board 7.17 1085 System Board Cover (1005) Adapters (1015) Math coprocessor, if installed (1020) Front or rear fixed disk drives, (1060)(1065) Fixed-disk-drive support structure (1075) Memory-module kits (1080). Notes: Disconnect all cables from the system board.
  • Page 54 IBM PS/2 Model 65 SX HMR 1090 Fixed Disk Drive Support Structure Bracket 7.18 1090 Fixed Disk Drive Support Structure Bracket Cover (1005) Adapters (1015) Front bezel (1035) Power supply (1045) Front or rear fixed disk drives, (1060)(1065) Fixed disk drive support structure (1070) System board (1085).
  • Page 55 IBM PS/2 Model 65 SX 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 8.0 - 1...

  • Page 56: Front View

    IBM PS/2 Model 65 SX HMR Front View 8.1 Front View Carrying handle Cover lock Power-good light Fixed disk drive in-use light Power switch Diskette drive in-use light Diskette drive A Diskette eject button Diskette drive B (if installed) Serial number.

  • Page 57: Rear View

    IBM PS/2 Model 65 SX HMR Rear View 8.2 Rear View Power cord connector Keyboard connector Pointing-device connector Parallel port Serial port Display connector SCSI connector (some models) Expansion slots. PICTURE 23 8.2 - 1...

  • Page 58: Interior View

    IBM PS/2 Model 65 SX HMR Interior View 8.3 Interior View Power supply Diskette drive A Diskette drive B (if installed) Front-bay fixed disk drives (if installed) Speaker assembly Expansion slots (numbered from bottom, 1 to 8) Rear-bay fixed disk drive Power-supply connectors.

  • Page 59: Internal Cables

    IBM PS/2 Model 65 SX HMR Internal Cables 8.4 Internal Cables This diagram shows the arrangement of the cables that connect the various devices. Power supply Fixed disk drive (rear bay) Fixed disk drive (front bay) Diskette drive A Diskette drive B...

  • Page 60: System Board

    IBM PS/2 Model 65 SX HMR System Board 8.5 System Board Fuse Power-supply connector Real-time clock module connector 2KB CMOS RAM extension module connector Diskette drive connector Memory-module-kit connectors 80387SX Math Coprocessor socket Speaker assembly connector 16-bit expansion slot Video slot (slot 6)
  • Page 61 IBM PS/2 Model 65 SX HMR Safety Grounds 9.0 Safety Grounds Power-cord connector Primary ground Chassis ground Expansion-slot screws Screws. PICTURE 27 Notes: 9.0 - 1...

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