Compaq 386 - Manual - manualsarea.com

Page 3 - NOTICE; MAINTENANCE AND SERVICE GUIDE; COMPAQ DESKPRO 386 Personal Computer

NOTICE The information in this guide is subject to change without notice.COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR TECH- NICAL OR EDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN; NOR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE FURNISHING, PERFORMANCE, OR USE OF THIS MATERIAL....

Page 4 - WARNING

ii WARNING This equipment has been certified to comply with the limits for a Class B computing device, pursuant to Subpart J of Part 15 of FCC Rules. Only peripherals (computer input/output devices, terminals, printers, etc.) certified to comply with the Class B limits may be attached to this comput...

Page 6 - PREFACE; CAUTION

iv PREFACE The COMPAQ DESKPRO 386 PERSONAL COMPUTER MAINTENANCE AND SERVICE GUIDE is a troubleshooting, maintenance, and repair guide that can be used as a reference when servicing the COMPAQ DESKPRO 386 Personal Computer.All troubleshooting and repair procedures are detailed to allow subassem- bly/...

Page 7 - SUMMARY OF TEXT; OPERATING AND PERFORMANCE SPECIFICATIONS pro-; SETUP PROGRAM describes the purpose and function of the; ADVANCED DIAGNOSTICS PROGRAM describes the use and; ERROR MESSAGES AND CODES lists and describes the Power-

v SUMMARY OF TEXT The COMPAQ DESKPRO 386 MAINTENANCE AND SERVICE GUIDE con- tains the following eight chapters: Chapter 1 OPERATING AND PERFORMANCE SPECIFICATIONS pro- vides operating and performance specifications for the COMPAQ DESKPRO 386 Personal Computer. Chapter 2 POWER-ON SELF-TEST (POST)/PRO...

Page 8 - ILLUSTRATED PARTS CATALOG contains illustrated part; REMOVAL AND REPLACEMENT PROCEDURES describes; JUMPER SETTINGS AND SWITCH SETTINGS provides de-

vi Chapter 6 ILLUSTRATED PARTS CATALOG contains illustrated part breakdowns, order numbers, and part names for the COMPAQ DESKPRO 386 Personal Computer. Chapter 7 REMOVAL AND REPLACEMENT PROCEDURES describes how to remove and replace subassemblies for the COMPAQ DESKPRO 386 Personal Computer. Chapte...

Page 9 - REQUIRED TOOLS AND SUPPLIES

vii REQUIRED TOOLS AND SUPPLIES To service the COMPAQ DESKPRO 386 Personal Computer, you need: □ Torx T-10 screwdriver □ Torx T-15 screwdriver □ Small Phillips screwdriver □ COMPAQ Personal Computer ADVANCED DIAGNOSTICS Diskette Version 5.XX (part no. 108137) □ Formatted scratch diskette(s) □ 25-pin...

Page 10 - ADDITIONAL INFORMATION

viii ADDITIONAL INFORMATION The following documentation and related software are available to support the COMPAQ DESKPRO 386 Personal Computer.Associated Documentation: □ COMPAQ DESKPRO 386 PERSONAL COMPUTER OPERATIONS GUIDE □ COMPAQ DESKPRO 386 TECHNICAL REFERENCE GUIDE VOLUMES I and II □ MS-DOS ® ...

Page 11 - CONTENTS

ix CONTENTS Chapter 1OPERATING AND PERFORMANCE SPECIFICATIONS 1.1 INTRODUCTION 1-1 1.2 COMPAQ DESKPRO 386 PERSONAL COMPUTER SYSTEM UNIT 1-2 1.3 COMPAQ ENHANCED KEYBOARD 1-3 1.4 COMPAQ 84-KEY KEYBOARD 1-3 1.5 COMPAQ DUAL-MODE MONITOR 1-4 1.6 COMPAQ COLOR MONITOR 1-5 1.7 COMPAQ VIDEO GRAPHICS COLOR MO...

Page 15 - Chapter 9; MASS STORAGE CONFIGURATIONS

xiii Chapter 9 MASS STORAGE CONFIGURATIONS 9.1 THEORY OF OPERATION 9-1 9.2 SYSTEM CONFIGURATION 9-2 9.3 SETTING UP THE EXTERNAL FIXED DISK DRIVE EXPANSION UNIT 9-6 Appendix AINDEX A-1

Page 17 - FIGURES

xv FIGURES 5-1. Memory Error Locations on the 32-Bit System Memory Board 5-31 5-2. Memory Error Locations on the 1- to 2-Megabyte 32-Bit Memory Board 5-32 5-3. Memory Error Locations on the 4- to 8-Megabyte 32-Bit Memory Board 5-33 6-1. System Unit (Exterior and Battery) 6-11 6-2. System Unit (Inter...

Page 22 - TABLES

xx TABLES 4-1. Matrix of Possible Tests for Various System Video Configurations 4-7 5-1. Power-On Self-Test Error Messages 5-1 5-2. Advanced Diagnostics Error Codes 5-5 6-1. Spare Parts List, U. S. 6-2 6-2. Spare Parts List, International 6-9 6-3. System Unit 6-10 6-4. COMPAQ Enhanced Keyboard 6-16 ...

Page 27 - OPERATING AND

Maintenance and Service Guide 1-1 1.1 INTRODUCTION This chapter provides operating and performance specifications for the following components of and options for the COMPAQ DESKPRO 386 Personal Computer: □ System Unit □ COMPAQ Enhanced Keyboard □ COMPAQ 84-Key Keyboard □ COMPAQ Dual-Mode Monitor □ C...

Page 28 - COMPAQ DESKPRO 386 PERSONAL COMPUTER SYSTEM UNIT

1-2 Chapter 1, Operating and Performance Specifications 1.2 COMPAQ DESKPRO 386 PERSONAL COMPUTER SYSTEM UNIT Dimensions: Height: Depth: Width: 6.35 in. (16.2 cm) 16.50 in. (41.9 cm) 19.80 in. (50.3 cm) Weight: Model 40: Model 70: Model 130: 42.0 lb (19.1 kg) 44.1 lb (20.0 kg) 44.1 lb (20.0 kg) Envir...

Page 29 - COMPAQ ENHANCED

Maintenance and Service Guide 1-3 1.3 COMPAQ ENHANCED KEYBOARD Dimensions: Height: Depth: Width: 8.30 in. (21.1 cm) 1.50 in. ( 3.8 cm) 19.25 in. (48.9 cm) Weight: 3.8 lb (1.7 kg) Power: Volts: Current: 5 VDC 250 mA maximum Number of Keys: 101 (102 keys for international units) Cable: Length: Interfa...

Page 31 - COMPAQ COLOR MONITOR

Maintenance and Service Guide 1-5 1.6 COMPAQ COLOR MONITOR Dimensions: Height: Depth: Width: 11.8 in. (30.0 cm) 15.0 in. (38.1 cm) 13.9 in. (35.3 cm) Weight: 27.5 lb (12.5 kg) Display: □ 13-inch (33.02) diagonal screen □ 640 or 320 pixels × 350 scan lines ( 16 colors from a palette of 64 colors) □ 6...

Page 32 - COMPAQ VIDEO GRAPHICS COLOR MONITOR

1-6 Chapter 1, Operating and Performance Specifications 1.7 COMPAQ VIDEO GRAPHICS COLOR MONITOR Dimensions: Height: Depth: Width: 14.1 in. (35.7 cm) 14.6 in. (37.0 cm) 13.8 in. (35.0 cm) Weight: 42.0 lb (19.1 kg) Display: □ 640 pixel × 480 line VGA-compatible graphics resolution □ 640 pixel × 350 li...

Page 34 - COMPAQ VIDEO GRAPHICS MONOCHROME MONITOR

1-8 Chapter 1, Operating and Performance Specifications 1.8 COMPAQ VIDEO GRAPHICS MONOCHROME MONITOR Dimensions: Height: Depth: Width: 10.2 in. (26.0 cm) 12.6 in. (32.1 cm) 11.7 in. (29.8 cm) Weight: 13.0 lb (5.9 kg) Display: □ 640 pixel × 480 line VGA-compatible graphics resolution □ 640 pixel × 35...

Page 45 - FOR THE EXPANSION UNIT

Maintenance and Service Guide 1-19 1.18 300-MEGABYTE FIXED DISK DRIVE FOR THE EXPANSION UNIT Dimensions: Height: Depth: Width: 3.25 in. ( 8.3 cm) 8.00 in. (20.3 cm) 5.75 in. (14.6 cm) (allow 0.375 in (0.95 cm) for installing rails) Weight: 8.0 lb (3.6 kg) Drive Type: (used in SETUP program) 38 Numbe...

Page 47 - PRELIMINARY STEPS TO PROBLEM ISOLATION

CONTENTS Chapter 2POWER-ON SELF-TEST (POST)/PROBLEM ISOLATION 2.1 INTRODUCTION 2-1 2.2 POWER-ON SELF-TEST (POST) 2-1 2.3 PRELIMINARY STEPS TO PROBLEM ISOLATION 2-2 2.4 PROBLEM ISOLATION FLOWCHART 2-2

Page 49 - Power supply

Maintenance and Service Guide 2-1 2.1 INTRODUCTION This chapter provides a list of the subassemblies that are tested by the Power-On Self-Test (POST), a list of steps that you should perform prior to going through the problem isolation procedures, and a problem isolation flowchart for quick referenc...

Page 50 - Install all appropriate loopback plugs and; PROBLEM ISOLATION

2-2 Chapter 2, Power-On Self-Test (Post)/Problem Isolation 2.3 PRELIMINARY STEPS TO PROBLEM ISOLATION If you encounter an error condition, complete the following steps before starting the problem isolation procedures. 1. Turn off power to the system unit.2. Disconnect any peripheral devices other th...

Page 57 - WHEN TO RUN SETUP

CONTENTS Chapter 3 SETUP PROGRAM 3.1 WHEN TO RUN SETUP 3-1 3.2 HOW TO RUN SETUP 3-2 Addendum 108431-001 (11-88) to Manual No. 108033-003

Page 59 - You need to run SETUP:; Chapter 3; SETUP PROGRAM

Maintenance and Service Guide 3-1 The COMPAQ personal computer uses a memory device that stores the current date, time, and system configuration. The SETUP program, in-cluded on both the ADVANCED DIAGNOSTICS and USER DIAGNOSTICS diskettes, enters this information into the memory device. 3.1 WHEN TO ...

Page 65 - PRELIMINARY STEPS; Install loopback and terminating plugs for; ADVANCED DIAGNOSTICS

Maintenance and Service Guide 4-1 Addendum 108431-001 (11-88) to Manual No. 108033-003 This chapter describes the ADVANCED DIAGNOSTICS program for the COMPAQ personal computer being tested. The screens and information displayed are specific to the system being tested. Diagnostics verify the proper o...

Page 66 - Run the Diagnostic Tests

4-2 Chapter 4, Advanced Diagnostics Program Addendum 108431-001 (11-88) to Manual No. 108033-003 6. Turn on the computer and monitor. Once POST completes successfully, the screen displays a list of the devices in-stalled.NOTE: The F1 function key can be used anytime during SETUP to access HELP. 7. V...

Page 67 - Format a Diskette

Maintenance and Service Guide 4-3 Addendum 108431-001 (11-88) to Manual No. 108033-003 Format a Diskette The ADVANCED DIAGNOSTICS program requires that a diskette be formatted for each diskette drive being tested. This utility is not the same as the operating system FORMAT command. A diskette format...

Page 68 - ADVANCED DIAGNOSTICS; System Test Menu; Run the tests once in an interactive mode; Test Logging Utilities Menu; This selection allows you to:

4-4 Chapter 4, Advanced Diagnostics Program Addendum 108431-001 (11-88) to Manual No. 108033-003 4.3 ADVANCED DIAGNOSTICS PROGRAM System Test Menu When running the diagnostic tests, the program allows you to: □ Run the tests once in an interactive mode □ Run the tests multiple times in a looping mod...

Page 69 - TEST SELECTION MENU; NOTE: If error codes appear as you run the; Processor

Maintenance and Service Guide 4-5 Addendum 108431-001 (11-88) to Manual No. 108033-003 4.4 TEST SELECTION MENU The Test Selection Menu selections vary according to the configuration of the computer being tested. You can elect to run one test, a combination of tests, or all of the tests. When you run...

Page 70 - Memory; NOTE: Before selecting this test, be sure you; Video

4-6 Chapter 4, Advanced Diagnostics Program Addendum 108431-001 (11-88) to Manual No. 108033-003 Memory The Memory test verifies memory data patterns, memory addressing, and parity detection for all system memory. Keyboard The Keyboard test verifies the keyboard inter-face, the individual keys, the ...

Page 71 - Table 4-1. Matrix of Possible Video Tests

Maintenance and Service Guide 4-7 Addendum 108431-001 (11-88) to Manual No. 108033-003 Table 4-1. Matrix of Possible Video Tests Video Controller/Display Video Test CGA EGA W/DMM EGA W/COLOR VGA W/COLOR VGA W/MONO MDA Video Controller X X X X X X Display Characteristics X X X X X Character Set X X X...

Page 72 - Video Controller

4-8 Chapter 4, Advanced Diagnostics Program Addendum 108431-001 (11-88) to Manual No. 108033-003 The following paragraphs describe the tests for the various video configurations. Video Controller The Video Controller selection verifies the integrity of the video display controller, the video graphic...

Page 75 - Lightpen

Maintenance and Service Guide 4-11 Addendum 108431-001 (11-88) to Manual No. 108033-003 Lightpen The Lightpen selection verifies that the lightpen is operating properly with the color monitor. Display Memory Pages The Display Memory Pages selection verifies that the system can address all eight page...

Page 76 - Noise

4-12 Chapter 4, Advanced Diagnostics Program Addendum 108431-001 (11-88) to Manual No. 108033-003 Gray Scale/Color The Gray Scale/Color selection verifies that the system can display as many as 16 shades of the gray scale and all 8 possible colors (at 2 intensi-ties for each). A display similar to S...

Page 77 - Enhanced Display Characteristics

Maintenance and Service Guide 4-13 Addendum 108431-001 (11-88) to Manual No. 108033-003 Enhanced Display Characteristics The Enhanced Display Characteristics selection verifies the ability of the video display controller and monitor to display certain attributes: normal and high intensities; blinkin...

Page 79 - Monochrome Text

Maintenance and Service Guide 4-15 Addendum 108431-001 (11-88) to Manual No. 108033-003 Monochrome Text The Monochrome Text selection verifies that the system can operate in the monochrome text mode. A display similar to Screen 12 appears on the monitor with the word “monochrome” blinking. Screen 12...

Page 81 - Monitor Alignment; Diskette Drive; NOTE: During certain tests, you may be asked; Random Seek

Maintenance and Service Guide 4-17 Addendum 108431-001 (11-88) to Manual No. 108033-003 Monitor Alignment The Monitor Alignment selection allows you to check the alignment and intensity of the video display unit. Diskette Drive The Diskette Drive test verifies that the diskette drive, diskette drive...

Page 82 - Diskette Change Line; Monochrome Video Board

4-18 Chapter 4, Advanced Diagnostics Program Addendum 108431-001 (11-88) to Manual No. 108033-003 Diskette Change Line The Diskette Change Line selection verifies that the diskette drive change-line circuitry is functioning properly. You may be instructed to remove and reinsert the blank diskette th...

Page 83 - Modem; Modem Internal Loopback

Maintenance and Service Guide 4-19 Addendum 108431-001 (11-88) to Manual No. 108033-003 Modem The Modem test runs a series of other tests that verify the modem and interface cables.The following selections are available: □ Modem Internal Loopback □ Auto Originate Mode □ Auto Answer Mode □ Modem Exte...

Page 84 - Modem Direct Connect; Fixed Disk Drive; Seek

4-20 Chapter 4, Advanced Diagnostics Program Addendum 108431-001 (11-88) to Manual No. 108033-003 Modem Direct Connect The Modem Direct Connect selection verifies the TIP/RING (two wire) loopback circuitry as well as the data transfer and bit error rate circuitry (as does the Modem Internal Loopback...

Page 85 - Head Select

Maintenance and Service Guide 4-21 Addendum 108431-001 (11-88) to Manual No. 108033-003 Head Select The Head Select selection verifies that each head of the fixed disk drive can be accessed and is functional. Error Detection and Correction The Error Detection and Correction selection verifies that t...

Page 86 - IMPORTANT; Conditional Format; NOTE: The computer must be turned on for at; Unconditional Format

4-22 Chapter 4, Advanced Diagnostics Program Addendum 108431-001 (11-88) to Manual No. 108033-003 IMPORTANT Because several of these selections destroy all information on the fixed disk drive, you may need to reinitialize the fixed disk drive.For more information on initializing the fixed disk drive...

Page 87 - NOTE: An Unconditional Format should be; Surface Analysis; Display Current Interleave

Maintenance and Service Guide 4-23 Addendum 108431-001 (11-88) to Manual No. 108033-003 NOTE: An Unconditional Format should be performed only if you are sure that tracks marked bad on the fixed disk drive are not actually bad. Good tracks may be marked bad as a result of using a defective fixed dis...

Page 88 - Fixed Disk Drive Backup Device; Format Fixed Disk Drive Backup Cartridge

4-24 Chapter 4, Advanced Diagnostics Program Addendum 108431-001 (11-88) to Manual No. 108033-003 Fixed Disk Drive Backup (Tape) The Fixed Disk Drive Backup (Tape) test verifies the tape backup, the fixed disk drive control-ler, the tape host adapter, and associated cables. Depending on the computer...

Page 89 - Fixed Disk Drive Backup; Enhanced Color Graphics

Maintenance and Service Guide 4-25 Addendum 108431-001 (11-88) to Manual No. 108033-003 Fixed Disk Drive Backup The Fixed Disk Drive Backup selection verifies that the system can identify the following on selected tracks of the tape cartridge: drive type; cartridge in place; write protect, beginning...

Page 91 - ADVANCED DIAGNOSTICS ERROR CODES

CONTENTS Chapter 5ERROR MESSAGES AND CODES 5.1 INTRODUCTION 5-1 5.2 POWER-ON SELF-TEST ERROR MESSAGES 5-1 5.3 ADVANCED DIAGNOSTICS ERROR CODES 5-4 5.4 MEMORY ERROR CODES 5-31 5.5 EXTDISK MESSAGES 5-36

Page 96 - ADVANCED DIAGNOSTICS

5-4 Chapter 5, Error Messages and Codes Addendum 108431-001 (11-88) to Manual No. 108033-003 5.3 ADVANCED DIAGNOSTICS ERROR CODES ADVANCED DIAGNOSTICS error codes occur if the system recognizes a problem while running the COMPAQ ADVANCED DIAGNOSTICS Pro-gram. These error codes help identify possible...

Page 99 - Table 5-2. Advanced Diagnostics Error Codes

Maintenance and Service Guide 5-7 Addendum 108431-001 (11-88) to Manual No. 108033-003 Table 5-2. Advanced Diagnostics Error Codes Continued Error Code Description Recommended Action 105-07 Port 61 bit 3 not at one. Replace the system board and retest for error codes 103-xx through 113-xx. 105-08 Po...

Page 123 - MEMORY ERROR CODES

Maintenance and Service Guide 5-31 Addendum 108431-001 (11-88) to Manual No. 108033-003 5.4 MEMORY ERROR CODES Memory error codes appear when the system detects a memory fault during the Power-On Self-Test (201 or 203 error codes) or as a result of a diagnostic test (203 error codes). The TEST progr...

Page 124 - Memory error codes in the following tables are in the format:

5-32 Chapter 5, Error Messages and Codes Addendum 108431-001 (11-88) to Manual No. 108033-003 Memory error codes in the following tables are in the format: Xx000Y ZZ 201 Failed data bit. Values are: 00, 01, 02, 04, 08, 10, 20, 40, 80. 00 = parity bit 01 = data bit 0 02 = data bit 1 04 = data bit 2 0...

Page 128 - NOTE: For more information on installation and

5-36 Chapter 5, Error Messages and Codes Addendum 108431-001 (11-88) to Manual No. 108033-003 5.5 EXTDISK MESSAGES The following list of messages may be issued while installing the EXTDISK utility. The probable cause of each error message and the recommended action to take are also described. NOTE: ...

Page 133 - ILLUSTRATED PARTS

Maintenance and Service Guide 6-1 Addendum 108431-001 (11-88) to Manual No. 108033-003 6.1 INTRODUCTION This chapter provides a reference for spare parts for the COMPAQ DESKPRO 386 Personal Computer. Each section contains a parts list which consists of: □ Description - The name of the particular par...

Page 151 - Table 6-4. COMPAQ Video Graphics Color Monitor

Maintenance and Service Guide 6-19 Addendum 108431-001 (11-88) to Manual No. 108033-003 Table 6-4. COMPAQ Video Graphics Color Monitor Description Part Number Monitor Assembly 109255-001 Figure 6-7. COMPAQ Video Graphics Color Monitor.

Page 152 - Table 6-4. COMPAQ Video Graphics Monochrome Monitor

6-20 Chapter 6, Illustrated Parts Catalog Addendum 108431-001 (11-88) to Manual No. 108033-003 Table 6-4. COMPAQ Video Graphics Monochrome Monitor Description Part Number Monitor Assembly 109254-001 Figure 6-8. COMPAQ Video Graphics Monochrome Monitor.

Page 153 - DISK DRIVE EXPANSION UNIT

Maintenance and Service Guide 6-21 Addendum 108431-001 (11-88) to Manual No. 108033-003 6.5 300-/600-MEGABYTE FIXED DISK DRIVE EXPANSION UNIT PARTS LIST The Parts Kit contains the recommended parts available to an Authorized COMPAQ Computer Dealer for the EXPANSION UNIT. NOTE: Cables from Cable Kit ...

Page 157 - PREPARING THE SYSTEM UNIT FOR THE INTERNAL REMOVAL AND

CONTENTS Chapter 7REMOVAL AND REPLACEMENT PROCEDURES 7.1 INTRODUCTION 7-1 7.2 MONITOR 7-2 7.3 KEYBOARD 7-5 7.4 POWER FUSE 7-6 7.5 PREPARING THE SYSTEM UNIT FOR THE INTERNAL REMOVAL AND REPLACEMENT PROCEDURES 7-8 7.6 SYSTEM UNIT COVER AND INTERNAL CONFIGURATION 7-9 7.7 POWER SUPPLY 7-12 7.8 BATTERY 7...

Page 159 - REMOVAL AND

Maintenance and Service Guide 7-1 7.1 INTRODUCTION This chapter contains module-level removal and replacement procedures for the COMPAQ DESKPRO 386 Personal Computer.The procedures in this section describe the following: □ Monitor □ Keyboard □ Power fuse □ Preparing the system unit for the internal ...

Page 160 - MONITOR; If the monitor has an ON/OFF switch on

7-2 Chapter 7, Removal and Replacement Procedures 7.2 MONITOR The following procedures apply to the COMPAQ Dual-Mode, COMPAQ Color, COMPAQ Video Graphics Monochrome, or COMPAQ Video Graphics Color Monitor. 1. Turn OFF the computer. CAUTION The system unit power should be OFF prior to disconnecting t...

Page 162 - Remove the monitor cables from the

7-4 Chapter 7, Removal and Replacement Procedures Figure 7-4. COMPAQ Video Graphics Monochrome Moni-tor (Installed). 4. Remove the monitor cables from the system unit. 5. Set the monitor aside. To replace the monitor, reverse Steps 1 through 5 of the preceding removal procedures.

Page 163 - To remove the keyboard, follow these steps:; Gently pull the keyboard connector from

Maintenance and Service Guide 7-5 7.3 KEYBOARD To remove the keyboard, follow these steps: 1. Turn OFF the computer. CAUTION The system unit power should be OFF prior to disconnecting the keyboard cable. 2. Gently pull the keyboard connector from the receptacle on the front of the system unit (Figur...

Page 165 - To replace the power fuse, follow these steps:; Be sure that the fuse clips fit tightly to ensure

Maintenance and Service Guide 7-7 To replace the power fuse, follow these steps: CAUTION Be sure that the fuse clips fit tightly to ensure a good electrical connection. 1. Put the fuse in the fuse holder.2. Position the fuse holder in the casing, and press until you feel the fuse holder snap into pl...

Page 166 - SYSTEM UNIT FOR THE; Complete the removal procedures in the

7-8 Chapter 7, Removal and Replacement Procedures 7.5 PREPARING THE SYSTEM UNIT FOR THE INTERNAL REMOVAL AND REPLACEMENT PROCEDURES To prepare the system unit for the internal removal and replacement procedures, follow these steps: 1. Complete the removal procedures in the following sections:a. 7.2 ...

Page 167 - SYSTEM UNIT COVER AND; Remove the three screws on the back of the

Maintenance and Service Guide 7-9 7.6 SYSTEM UNIT COVER AND INTERNAL CONFIGURATION To remove the system unit cover, follow these steps: 1. Complete the removal procedures in the following sections:a. 7.2 MONITORb. 7.3 KEYBOARD c. 7.5 PREPARING THE SYSTEM UNIT FOR THE INTERNAL REMOVAL AND REPLACEMENT...

Page 168 - Unlock the security lock to free the system; Familiarize yourself with the arrange-

7-10 Chapter 7, Removal and Replacement Procedures 3. Unlock the security lock to free the system unit cover. 4. Positioning yourself at the front of the system unit, slide the system unit cover toward you until you feel it stop. 5. Lift the cover straight up and off of the system unit (Figure 7-9)....

Page 171 - Remove the four screws that secure the

Maintenance and Service Guide 7-13 3. Remove the four screws that secure the power supply assembly to the chassis (Figure 7-12). Figure 7-12. Removing the Power Supply Screws. 4. Slide the power supply assembly toward the drive housing assembly until the power supply assembly is released from the ta...

Page 172 - Shift the power supply slightly away from

7-14 Chapter 7, Removal and Replacement Procedures 5. Shift the power supply slightly away from the system board to locate the power supply connector on the system board (Figure 7-14). Figure 7-14. Location of the Power Supply Connector on the System Board. 6. Disconnect the power supply connector f...

Page 173 - To remove the battery, follow these steps:

Maintenance and Service Guide 7-15 7.8 BATTERY The battery is secured to the system unit chassis with a VELCRO strip and is connected to the system board by a small cable and connector. Disconnecting the battery removes the time, date, and system configuration information from the system memory. Any...

Page 174 - Locate and remove the battery connector

7-16 Chapter 7, Removal and Replacement Procedures 2. Locate the battery (Figure 7-15). Figure 7-15. Location of the Battery. 3. Locate and remove the battery connector from the system board (Figure 7-16). Figure 7-16. Location of the Battery Connector.

Page 175 - Remove the battery from the system unit

Maintenance and Service Guide 7-17 4. Remove the battery from the system unit (Figure 7-17). 5. To dispose of the battery properly, see Service Bulletin 46. Figure 7-17. Removing the Battery. To replace the battery, follow these steps: 1. Reverse Steps 1 through 4 of the preceding removal procedures...

Page 179 - Remove the retaining screw that secures

Maintenance and Service Guide 7-21 5. Remove the retaining screw that secures the expansion board to the chassis. 6. Disconnect any signal cables attached to the expansion board (Figures 7-22, 7-23, 7-24). Figure 7-22. Removing the ESDI Fixed Disk Drive Controller Board Signal Cables. Figure 7-23. R...

Page 182 - Align the pins on the 80287 coprocessor; MEMORY EXPANSION

7-24 Chapter 7, Removal and Replacement Procedures To replace the 80287 coprocessor, follow these steps: 1. Align the pins on the 80287 coprocessor with the 80287 coprocessor socket. 2. Press the coprocessor into the socket.3. Complete the replacement procedures in the following sections:a. 7.10 EXP...

Page 183 - Remove the five mounting screws holding

Maintenance and Service Guide 7-25 2. Remove the five mounting screws holding the memory expansion board to the 32-bit system memory board. 3. Gently pull the memory expansion board away from the 32-bit system memory board, and set the memory expansion board aside (Figure 7-27). To replace a memory ...

Page 184 - To remove a memory chip, follow these steps:

7-26 Chapter 7, Removal and Replacement Procedures 7.13 MEMORY CHIP(S) Memory chips can be installed on the 32-bit system memory board, 1- to 2-megabyte 32-bit memory expansion board, 4- to 8-megabyte 32-bit memory expansion board, and .5- to 2-megabyte 16-bit memory expansion board. Use a memory ch...

Page 185 - Using a memory chip removal tool, remove

Maintenance and Service Guide 7-27 CAUTION The memory chips are sensitive to static electricity and are shipped on conductive foam to protect them from accidental electro-static discharge. Do not remove them from the conductive shipping foam until you are ready to install them. 2. Using a memory chi...

Page 186 - To replace a memory chip, follow these steps:; The pins on the chips bend easily. Carefully; Using a memory chip insertion tool, insert

7-28 Chapter 7, Removal and Replacement Procedures To replace a memory chip, follow these steps: CAUTION The pins on the chips bend easily. Carefully line up the pins in the socket before pressing the chips into place. 1. Using a memory chip insertion tool, insert the replacement memory chip so that...

Page 187 - Be sure that all the pins are in the socket; SPEAKER ASSEMBLY AND

Maintenance and Service Guide 7-29 2. Be sure that all the pins are in the socket and that none are bent. 3. Press the chip into place.4. Complete the replacement procedures in the following sections:a. 7.12 MEMORY EXPANSION BOARD(S). If applicable. b. 7.10 EXPANSION BOARD(S). c. 7.6 SYSTEM UNIT COV...

Page 188 - Locate the speaker/board guide assembly

7-30 Chapter 7, Removal and Replacement Procedures 2. Locate the speaker/board guide assembly (Figure 7-30). Figure 7-30. Location of the Speaker/Board Guide Assembly. 3. Remove the speaker/board guide assembly by pushing the plastic catch on the front of the chassis and swinging the assembly away f...

Page 189 - Locate and disconnect the speaker

Maintenance and Service Guide 7-31 4. Locate and disconnect the speaker connector (J115) and security lock switch connector (J119) from the system board (see Figure 7-32). Figure 7-32. Location of the Speaker Connector and Security Lock Switch Connector.

Page 190 - Carefully remove the speaker assembly

7-32 Chapter 7, Removal and Replacement Procedures 5. Carefully remove the speaker assembly from the speaker/board guide assembly (Figure 7-33). Figure 7-33. Removing the Speaker Assembly. 6. Carefully remove the security lock switch from the speaker/board guide assembly (Figure 7-34). Figure 7-34. ...

Page 191 - Table 7-1. Configurations of Mass Storage Devices

Maintenance and Service Guide 7-33 7.15 MASS STORAGE DEVICE(S) Mass storage devices can be installed in positions A, B, C, and D (Figure 7-35) in several configura-tions. Procedures for removing and replacing mass storage devices vary with the drive position.Table 7-1 shows the possible configuratio...

Page 192 - Removal and Replacement

7-34 Chapter 7, Removal and Replacement Procedures Removal and Replacement Procedures for Drive Positions A or D To remove a mass storage device from drive posi-tions A or D, follow these steps: 1. Complete the removal procedures in the following sections:a. 7.2 MONITORb. 7.3 KEYBOARDc. 7.5 PREPARIN...

Page 193 - Remove the mounting screws on the left

Maintenance and Service Guide 7-35 3. Remove the mounting screws on the left side of the appropriate drive housing as-sembly (Figure 7-37). Figure 7-37. Location of the Screws for Positions A and D. 4. Slide the mass storage device out of the drive housing assembly (Figures 7-38 and 7-39). Figure 7-...

Page 194 - for Drive Positions A and D

7-36 Chapter 7, Removal and Replacement Procedures To replace a mass storage device in drive posi-tions A or D, reverse Steps 1 through 4 of the preceding removal procedures. When you recon-nect the power cable, follow the guidelines for power cable connections in Table 7-2. Table 7-2. Power Cable C...

Page 195 - Locate and disconnect the signal cable and; for Drive Positions B and C

Maintenance and Service Guide 7-37 Addendum 108431-001 (11-88) to Manual No. 108033-003 2. Locate and disconnect the signal cable and the power cable from the back of the mass storage device in drive position B or C (Figure 7-40). 3. Remove the retaining screws on the side of the drive housing assem...

Page 196 - ESDI Fixed Disk Drive Controller

7-38 Chapter 7, Removal and Replacement Procedures Addendum 108431-001 (11-88) to Manual No. 108033-003 To replace a full-height mass storage device in drive positions B or C, follow these steps: IMPORTANT When the drive is ordered as a spare part, it comes formatted for use with one of two ESDI Fix...

Page 197 - NOTE: Software supports drive types in the

Maintenance and Service Guide 7-39 Addendum 108431-001 (11-88) to Manual No. 108033-003 NOTE: Software supports drive types in the following manner: □ MS-DOS 3.2 or later supports drive type 25 or 35. Depending on the application, there may be some performance improvement by using drive type 35. □ M...

Page 198 - Locate and disconnect the universal power

7-40 Chapter 7, Removal and Replacement Procedures Addendum 108431-001 (11-88) to Manual No. 108033-003 2. Locate and disconnect the universal power cables, battery connector, monitor power connector, and power supply connector from the system board (Figures 7-42 and 7-43). Figure 7-42. Location of ...

Page 200 - Locate and disconnect the security lock

7-42 Chapter 7, Removal and Replacement Procedures Addendum 108431-001 (11-88) to Manual No. 108033-003 3. Locate and disconnect the security lock switch connector, keyboard connector, and speaker connector (Figures 7-44 and 7-45). Figure 7-44. Location of the Security Lock Switch Connector, Keyboar...

Page 202 - Remove the ten mounting screws that

7-44 Chapter 7, Removal and Replacement Procedures Addendum 108431-001 (11-88) to Manual No. 108033-003 4. Remove the ten mounting screws that secure the system board to the chassis. 5. Carefully remove the system board from the chassis (Figure 7-46). Figure 7-46. Removing the System Board. To repla...

Page 204 - Insert the prongs of the coprocessor removal; Using an upward motion, lift the side of the

7-46 Chapter 7, Removal and Replacement Procedures Addendum 108431-001 (11-88) to Manual No. 108033-003 2. Insert the prongs of the coprocessor removal tool under one side of the coprocessor. CAUTION Do not press down on the handle of the co-processor removal tool. 3. Using an upward motion, lift th...

Page 205 - Locate pin 1 of the coprocessor socket on

Maintenance and Service Guide 7-47 Addendum 108431-001 (11-88) to Manual No. 108033-003 To replace the 387 Coprocessor, follow these steps: CAUTION The most important step when installing the 387 coprocessor in a COMPAQ DESKPRO 386 Personal Computer is orientation of the coprocessor. See Figure 7-38...

Page 206 - Press the coprocessor into the coprocessor; NOTE: When you reconnect the power; SECURITY LOCK SWITCH.

7-48 Chapter 7, Removal and Replacement Procedures Addendum 108431-001 (11-88) to Manual No. 108033-003 CAUTION More pressure is needed to press the copro- cessor into the socket than is required for installing memory chips. BE SURE the pres- sure exerted is firm enough to seat the coprocessor and i...

Page 209 - Fixed Disk Drive Unit; Complete the steps at the beginning of

Maintenance and Service Guide 7-51 Addendum 108431-001 (11-88) to Manual No. 108033-003 Fixed Disk Drive Unit To remove a fixed disk drive from an expansion unit, perform the following steps. 1. Complete the steps at the beginning of this section. 2. Disconnect the 20- and 34-pin signal cables from ...

Page 210 - Remove the three retaining screws securing

7-52 Chapter 7, Removal and Replacement Procedures Addendum 108431-001 (11-88) to Manual No. 108033-003 4. Remove the three retaining screws securing the fixed disk drive to the expansion unit (Figure 7-52). Figure 7-52. Fixed Disk Drive Retaining Screws. 5. Carefully slide the drive out of the expa...

Page 211 - Locate the terminating resistor on the

Maintenance and Service Guide 7-53 Addendum 108431-001 (11-88) to Manual No. 108033-003 To remove the terminating resistor, complete the following steps: 1. Locate the terminating resistor on the fixed disk drive.NOTE: Terminating resistors are located in different positions depending on the manufac...

Page 212 - Power Supply

7-54 Chapter 7, Removal and Replacement Procedures Addendum 108431-001 (11-88) to Manual No. 108033-003 Power Supply To remove the power supply from the expansion unit complete the following steps. 1. Complete the steps at the beginning of this section. 2. Remove the four screws securing the power s...

Page 213 - External Interface Adapter Board; Complete the steps at the beginning of this

Maintenance and Service Guide 7-55 Addendum 108431-001 (11-88) to Manual No. 108033-003 External Interface Adapter Board To remove the external interface adapter board from the expansion unit complete the following steps: 1. Complete the steps at the beginning of this section. 2. Disconnect the 20- ...

Page 214 - Remove the external interface adapter; NOTE: For internal or external switch settings

7-56 Chapter 7, Removal and Replacement Procedures Addendum 108431-001 (11-88) to Manual No. 108033-003 4. Remove the external interface adapter board.NOTE: Inspect new external interface adapter board for shipping damage prior to installation. To replace the external interface adapter board, revers...

Page 217 - JUMPER SETTINGS AND

Maintenance and Service Guide 8-1 8.1 INTRODUCTION This chapter shows the switch and jumper loca-tions on the following: □ System board □ 32-bit system memory board □ .5- to 2-megabyte 16-bit memory expansion board □ 1-to 2-megabyte or 4-to 8-megabyte 32-bit memory expansion board □ ESDI Fixed Disk ...

Page 223 - Do not connect jumpers E3 to E4 or E6 to E7

Maintenance and Service Guide 8-7 Table 8-5. Jumper Settings for the 32-Bit System Memory Board (assy. no. 000413) Jumper Selection Function Memory Selected E1 to E2, E4 to E5 E7 to E8 256 Kbytes of base memory selected No extended memory 1-megabyte E2 to E3, E4 to E5 E7 to E8 512 Kbytes of base mem...

Page 225 - Memory Expansion Board

Maintenance and Service Guide 8-9 Table 8-6. Jumper Settings for the .5- to 2-Megabyte 16-Bit Memory Expansion Board Jumper Selection Function E1 to E2, E4 to E5 Base address of 4 megabytes selected (default) E1 to E2, E5 to E6 Base address of 6 megabytes selected E2 to E3, E4 to E5 Base address of ...

Page 226 - EXPANSION BOARDS

8-10 Chapter 8, Jumper Settings and Switch Settings Figure 8-5a. 1- to 2-Megabyte 32-Bit Memory Expansion Board (assy. no. 000450). Figure 8-5b. 4- to 8-Megabyte 32-Bit Memory Expansion Board (assy. no. 000459). 8.5 1- TO 2-MEGABYTE AND 4- TO 8-MEGABYTE 32-BIT MEMORY EXPANSION BOARDS

Page 227 - Bank 3 Enabled; 2-Bit Memory Expansion Boards

Maintenance and Service Guide 8-11 Bank 3 Enabled When pin 1 to pin 2 is jumpered, Bank 3 (socketed memory) is accessed normally by the system. If memory is not installed in Bank 1 and the jumper is set in this position, parity errors occur. Bank 3 Disabled When pin 2 to 3 is jumpered, Bank 3 (socke...

Page 228 - ESDI FIXED DISK DRIVE CONTROLLER BOARD

8-12 Chapter 8, Jumper Settings and Switch Settings 8.6 ESDI FIXED DISK DRIVE CONTROLLER BOARD Figure 8-7. ESDI Fixed Disk Drive Controller Board (assy. no. WD1005WAH).

Page 230 - MULTIPURPOSE FIXED DISK DRIVE CONTROLLER BOARDS

8-14 Chapter 8, Jumper Settings and Switch Settings 8.7 MULTIPURPOSE FIXED DISK DRIVE CONTROLLER BOARDS Figure 8-8. Multipurpose Fixed Disk Drive Controller Board (assy. no. 000336-001 or -021).

Page 236 - HOST ADAPTER BOARD

8-20 Chapter 8, Jumper Settings and Switch Settings 8.9 HOST ADAPTER BOARD Figure 8-11. Host Adapter Board (assy. no. 000774).

Page 237 - Table 8-13. Switch Settings for the Host Adapter Board

Maintenance and Service Guide 8-21 Table 8-13. Switch Settings for the Host Adapter Board 1 2 3 4 5 6 7 8 Function ON OFF OFF ON Interrupt select IRQ5 (default) Interrupt select IRQ3 ON OFF OFF ON ON OFF OFF ON DMA channel 3 (default) DMA channel 1 ON OFF OFF ON Base address 300 hex (default) Base a...

Page 238 - COMPAQ ENHANCED COLOR GRAPHICS BOARD

8-22 Chapter 8, Jumper Settings and Switch Settings 8.10 COMPAQ ENHANCED COLOR GRAPHICS BOARD Figure 8-12. COMPAQ Enhanced Color Graphics Boards (assy. no. 000410 and 000471).

Page 239 - computer system before installing the board.

Maintenance and Service Guide 8-23 The COMPAQ Enhanced Color Graphics Board has two banks of configuration switches (SW1 and SW2) as well as two jumpers (P1 and JP3) that must be positioned to allow the board to work properly with your computer system (Figure 8-18). The monitor you use with the COMP...

Page 240 - Configuration Switch Bank SW1; as the Only or Primary Video Display Controller Board

8-24 Chapter 8, Jumper Settings and Switch Settings Configuration Switch Bank SW1 The setting for configuration switch bank SW1 is determined by whether the COMPAQ Enhanced Color Graphics Board is to be used as: □ The only video display controller board or the primary video display controller board ...

Page 241 - as the Secondary Video Display Controller Board

Maintenance and Service Guide 8-25 Table 8-14. SW1 Settings for the COMPAQ Enhanced Color Graphics Board as the Secondary Video Display Controller Board Switches Monitor Type Power-On Mode 1 2 3 4 COMPAQ Color, compatible Enhanced Color, or COMPAQ Dual-Mode Monitor 80 × 25 (640 × 350) OFF OFF ON ON ...

Page 242 - Configuration Switch Bank SW2

8-26 Chapter 8, Jumper Settings and Switch Settings Configuration Switch Bank SW2 The setting for configuration switch bank SW2 is determined by the monitor type that you use with the COMPAQ Enhanced Color Graphics Board. Table 8-16 SW2 Settings for the COMPAQ Enhanced Color Graphics Board Configura...

Page 243 - Configuration Switch Bank SW3

Maintenance and Service Guide 8-27 Configuration Switch Bank SW3 If the SW3 switches are present, they are reserved and should be set to the OFF position. Jumper P1 Settings for the COMPAQ Enhanced Color Graphics Board The setting for Jumper P1 is determined by the monitor used with the COMPAQ Enhan...

Page 244 - CONTROLLER BOARDS; Video Display Controller Board

8-28 Chapter 8, Jumper Settings and Switch Settings 8.11 VIDEO DISPLAY CONTROLLER BOARDS The COMPAQ video display controller boards (assy. no. 000031, 000160, 000345, and 000525) support only those video monitors that require positive and vertical horizontal synchronization pulses. Jumpers J3 and J5...

Page 246 - Table 8-18. Jumper Settings for the Video Display Controller Board

8-30 Chapter 8, Jumper Settings and Switch Settings Figure 8-18. Jumper Settings for the Video Display Controller Board (assy. no. 000525). Table 8-18. Jumper Settings for the Video Display Controller Board (assy. no. 000525). J3/5 Configuration 2-3 Enable RGBI and composite video (high-scan) (Deskt...

Page 247 - COMPAQ VIDEO GRAPHICS CONTROLLER BOARD

Maintenance and Service Guide 8-31 Addendum 108431-001 (11-88) to Manual No. 108033-003 8.12 COMPAQ VIDEO GRAPHICS CONTROLLER BOARD Figure 8-19. Jumper Locations on the COMPAQ Video Graphics Controller Board (assy. no. 109360). Table 8-19. Jumper Settings for the COMPAQ Video Graphics Controller Boa...

Page 248 - ASYNCHRONOUS COMMUNICATIONS/PARALLEL; Table 8-20. Asynchronous Communications/Parallel Printer Board

8-32 Chapter 8, Jumper Settings and Switch Settings Addendum 108431-001 (11-88) to Manual No. 108033-003 8.13 ASYNCHRONOUS COMMUNICATIONS/PARALLEL PRINTER BOARD Table 8-20. Asynchronous Communications/Parallel Printer Board (assy. no. 000570) Switch Settings Switch Function Setting 1 Reserved Always...

Page 250 - Table 8-21. Asynchronous Communications/Parallel Printer Board

8-34 Chapter 8, Jumper Settings and Switch Settings Addendum 108431-001 (11-88) to Manual No. 108033-003 Table 8-21. Asynchronous Communications/Parallel Printer Board (assy. no. 000990) Switch Settings Switch Function Setting 1 Reserved Always OFF 2 Reserved Always OFF 3, 4 Parallel Port Select/Dis...

Page 252 - FIXED DISK DRIVE; Disk Drive Controller Board

8-36 Chapter 8, Jumper Settings and Switch Settings Addendum 108431-001 (11-88) to Manual No. 108033-003 8.14 300-/600-MEGABYTE FIXED DISK DRIVE EXPANSION UNIT The 300-/600-Megabyte Fixed Disk Drive Expan-sion Unit can be used with 386-based COMPAQ desktop systems with ROM revision G or later.NOTE: ...

Page 257 - MASS STORAGE

Maintenance and Service Guide 9-1 Addendum 108431-001 (11-88) to Manual No. 108033-003 9.1 THEORY OF OPERATION The 300-/600-Megabyte Fixed Disk Drive Expansion Unit can be used with a COMPAQ DESKPRO 386-based Personal Computer with system ROM revision G or later. The expansion unit can be used as a ...

Page 258 - NOTE: For information on component removal; SYSTEM CONFIGURATION; NOTE: Internal cables are not interchangeable; Maximum Storage

9-2 Chapter 9, Mass Storage Configuration Addendum 108431-001 (11-88) to Manual No. 108033-003 □ Duplexing. The main difference between mirroring and duplexing is that the two drives in the mirrored unit operate off one controller and the two fixed disk drives in the duplexed unit operate off two co...

Page 259 - NOTE: For maximum storage the system is

Maintenance and Service Guide 9-3 Addendum 108431-001 (11-88) to Manual No. 108033-003 For MS-DOS (with the device driver) to support any two internal fixed disk drives, with one expansion unit, two rules must be followed. □ A maximum of two controllers may be plugged into the system bus. □ Each con...

Page 260 - Mirroring

9-4 Chapter 9, Mass Storage Configuration Addendum 108431-001 (11-88) to Manual No. 108033-003 Mirroring IMPORTANT Novell Netware software must be used when setting up the system for proper operation of the mirroring function. Two possible mirroring configurations are currently supported by COMPAQ C...

Page 261 - Duplexing

Maintenance and Service Guide 9-5 Addendum 108431-001 (11-88) to Manual No. 108033-003 Duplexing IMPORTANT Novell Netware software must be used when setting up the system for the duplexing function to work. COMPAQ Computer Corporation also supports one duplexing configuration. Duplexing is sup-porte...

Page 262 - EXTERNAL FIXED DISK; NOTE: The EXTDISK.SYS device driver needs; FDISK Utility

9-6 Chapter 9, Mass Storage Configuration Addendum 108431-001 (11-88) to Manual No. 108033-003 9.3 SETTING UP THE EXTERNAL FIXED DISK DRIVE EXPANSION UNIT NOTE: The EXTDISK.SYS device driver needs to be installed in the CONFIG.SYS file only if you are running the expansion unit at the secondary addr...

Page 263 - Format Command

Maintenance and Service Guide 9-7 Addendum 108431-001 (11-88) to Manual No. 108033-003 Use the FDISK utility to partition each fixed disk drive that is to be used with the expansion unit. Each fixed disk drive can have up to four partitions.If the expansion unit is configured at the primary address,...

Page 265 - Select the primary or alternate disk con-

Maintenance and Service Guide 9-9 Addendum 108431-001 (11-88) to Manual No. 108033-003 □ NVCPQDSK is for use with mirrored or duplexed disk configurations that require maximum performance.NOTE: Execution of the NetWare UNMIRROR command terminates write duplication on mirrored or duplexed drives. The...

Page 266 - Install the external fixed disk drive con-

9-10 Chapter 9, Mass Storage Configuration Addendum 108431-001 (11-88) to Manual No. 108033-003 3. Install the external fixed disk drive con- troller. Refer to Chapter 7, REMOVAL AND REPLACEMENT PROCEDURES. 4. Follow the instructions in Chapter 3, SETUP PROGRAM, for running the SETUP program to init...

Page 268 - Command

9-12 Chapter 9, Mass Storage Configuration Addendum 108431-001 (11-88) to Manual No. 108033-003 From the A > prompt, enter the following commands: Command Where x is: When Using: INSTOVL 1x SUPPORT 5¼-Inch Diskettes NETGEN 3½-Inch Diskettes NINSTALL -ox-pr 1 Advanced Netware 2 SFT NetWare 3 SFT N...

Page 269 - Appendix A; INDEX

Maintenance and Service Guide A-1 Addendum 108431-001 (11-88) to Manual No. 108033-003 A Advanced Diagnostics Diskette 2-2, 3-1, 3-2 Advanced Diagnostics Error Codes 5-4 Advanced Diagnostics Program 4-1 Advanced Diagnostics Program 4-4 Main Menu 4-2 Preliminary Steps 4-1 Test Selection Menu 4-5 Asyn...

Compaq 386 - Manual

Table of Contents:

Summary

Other Compaq Models