Compaq Compaq Portable II Specifications

COMPAQ DESKPRO 386 Personal Computer MAINTENANCE AND SERVICE GUIDE

viiiADDITIONAL INFORMATIONThe following documentation and related software are available to support the COMPAQ DESKPRO 386 Personal Computer.Associate

5-8 Chapter 5, Error Messages and Codes Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedErro

Maintenance and Service Guide 5-9Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedError Cod

5-10 Chapter 5, Error Messages and Codes Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedErr

Maintenance and Service Guide 5-11Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedError C

5-12 Chapter 5, Error Messages and Codes Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedErr

Maintenance and Service Guide 5-13Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedError C

5-14 Chapter 5, Error Messages and Codes Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedErr

Maintenance and Service Guide 5-15Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedError C

5-16 Chapter 5, Error Messages and Codes Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedErr

Maintenance and Service Guide 5-17Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedError Co

ixCONTENTSChapter 1OPERATING AND PERFORMANCE SPECIFICATIONS1.1 INTRODUCTION 1-11.2 COMPAQ DESKPRO 386 PERSONAL COMPUTER SYSTEM UNIT1-21.3 COMPAQ ENHA

5-18 Chapter 5, Error Messages and Codes Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedErr

Maintenance and Service Guide 5-19Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedError C

5-20 Chapter 5, Error Messages and Codes Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedErr

Maintenance and Service Guide 5-21Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedError C

5-22 Chapter 5, Error Messages and Codes Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedErr

Maintenance and Service Guide 5-23Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedError C

5-24 Chapter 5, Error Messages and Codes Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedErr

Maintenance and Service Guide 5-25Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedError C

5-26 Chapter 5, Error Messages and Codes Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedErr

Maintenance and Service Guide 5-27Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedError C

xChapter 2POWER-ON SELF-TEST (POST)/PROBLEM ISOLATION2.1 INTRODUCTION 2-12.2 POWER-ON SELF-TEST (POST) 2-12.3 PRELIMINARY STEPS TO PROBLEM ISOLATION 2

5-28 Chapter 5, Error Messages and Codes Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedErr

Maintenance and Service Guide 5-29Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedError C

5-30 Chapter 5, Error Messages and Codes Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedErr

Maintenance and Service Guide 5-31Addendum 108431-001 (11-88) to Manual No. 108033-0035.4 MEMORY ERROR CODESMemory error codes appear when the syst

5-32 Chapter 5, Error Messages and Codes Addendum 108431-001 (11-88) to Manual No. 108033-003Memory error codes in the following tables are in the fo

Maintenance and Service Guide 5-33Addendum 108431-001 (11-88) to Manual No. 108033-003Figure 5-1. Memory Error Locations on the 32-Bit System Memo

5-34 Chapter 5, Error Messages and Codes Addendum 108431-001 (11-88) to Manual No. 108033-003Figure 5-2. Memory Error Locations on the 1- to 2-Megab

Maintenance and Service Guide 5-35Addendum 108431-001 (11-88) to Manual No. 108033-003 Figure 5-3. Memory Error Locations on the 4- to 8-Me

5-36 Chapter 5, Error Messages and Codes Addendum 108431-001 (11-88) to Manual No. 108033-0035.5 EXTDISK MESSAGESThe following list of messages may b

Maintenance and Service Guide 5-37Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-5. EXTDISK Messages Message Probable Cause Recommend

xiChapter 6ILLUSTRATED PARTS CATALOG6.1 INTRODUCTION 6-16.2 SPARE PARTS LIST, U.S. 6-26.3 SPARE PARTS LIST, INTERNATIONAL 6-96.4 PARTS LIST 6-106.5 30

CONTENTSChapter 6ILLUSTRATED PARTS CATALOG6.1 INTRODUCTION 6-16.2 SPARE PARTS LIST, U.S. 6-26.3 SPARE PARTS LIST, INTERNATIONAL 6-96.4 PARTS LIST 6-10

Maintenance and Service Guide 6-1Addendum 108431-001 (11-88) to Manual No. 108033-0036.1 INTRODUCTIONThis chapter provides a reference for spare pa

6-2 Chapter 6, Illustrated Parts Catalog Addendum 108431-001 (11-88) to Manual No. 108033-0036.2 SPARE PARTS LIST, U.S. Table 6-1. Spare Parts List,

Maintenance and Service Guide 6-3Addendum 108431-001 (11-88) to Manual No. 108033-003Table 6-1. Spare Parts List, U.S. Continued Description Part N

6-4 Chapter 6, Illustrated Parts Catalog Addendum 108431-001 (11-88) to Manual No. 108033-003Table 6-1. Spare Parts List, U.S. Continued Description

Maintenance and Service Guide 6-5Addendum 108431-001 (11-88) to Manual No. 108033-003Table 6-1. Spare Parts List, U.S. Continued Description Part N

6-6 Chapter 6, Illustrated Parts Catalog Addendum 108431-001 (11-88) to Manual No. 108033-003Table 6-1. Spare Parts List, U.S. Continued Description

Maintenance and Service Guide 6-7Addendum 108431-001 (11-88) to Manual No. 108033-003Table 6-1. Spare Parts List, U.S. Continued Description Part N

xii7.15 MASS STORAGE DEVICE(S) 7-337.16 SYSTEM BOARD 7-397.17 INTEL 387 COPROCESSOR 7-457.18 LOST KEY 7-497.19 300-/600-MEGABYTE FIXED DISK DRIVE EXP

6-8 Chapter 6, Illustrated Parts Catalog Addendum 108431-001 (11-88) to Manual No. 108033-003Table 6-1. Spare Parts List, U.S. Continued Description

Maintenance and Service Guide 6-9Addendum 108431-001 (11-88) to Manual No. 108033-0036.3 SPARE PARTS LIST, INTERNATIONAL Table 6-2. Spare Parts Lis

6-10 Chapter 6, Illustrated Parts Catalog Addendum 108431-001 (11-88) to Manual No. 108033-003Table 6-2. Spare Parts List, International* Continued D

Maintenance and Service Guide 6-11Addendum 108431-001 (11-88) to Manual No. 108033-003Figure 6-1. System Unit (Exterior and Battery).

6-12 Chapter 6, Illustrated Parts Catalog Addendum 108431-001 (11-88) to Manual No. 108033-003Table 6-3. System Unit ContinuedDescription Part Number

Maintenance and Service Guide 6-13Addendum 108431-001 (11-88) to Manual No. 108033-003Figure 6-2. System Unit (Interior with Memory Options).

6-14 Chapter 6, Illustrated Parts Catalog Addendum 108431-001 (11-88) to Manual No. 108033-003Table 6-3. System Unit ContinuedDescription Part Number

Maintenance and Service Guide 6-15Addendum 108431-001 (11-88) to Manual No. 108033-003Figure 6-3. System Unit (Interior with Controller Boards and

6-16 Chapter 6, Illustrated Parts Catalog Addendum 108431-001 (11-88) to Manual No. 108033-003Table 6-4. COMPAQ Enhanced Keyboard Description Part Nu

Maintenance and Service Guide 6-17Addendum 108431-001 (11-88) to Manual No. 108033-003[ page missing ]

xiiiChapter 9MASS STORAGE CONFIGURATIONS9.1 THEORY OF OPERATION 9-19.2 SYSTEM CONFIGURATION 9-29.3 SETTING UP THE EXTERNAL FIXED DISK DRIVE EXPANSION

6-18 Chapter 6, Illustrated Parts Catalog Addendum 108431-001 (11-88) to Manual No. 108033-003[ page missing ]

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

6-20 Chapter 6, Illustrated Parts Catalog Addendum 108431-001 (11-88) to Manual No. 108033-003Table 6-4. COMPAQ Video Graphics Monochrome Monitor Des

Maintenance and Service Guide 6-21Addendum 108431-001 (11-88) to Manual No. 108033-0036.5 300-/600-MEGABYTE FIXED DISK DRIVE EXPANSION UNIT PARTS L

6-22 Chapter 6, Illustrated Parts Catalog Addendum 108431-001 (11-88) to Manual No. 108033-003Figure 6-9. 300-/600-Megabyte Fixed Disk Drive Expansi

Maintenance and Service Guide 6-23Addendum 108431-001 (11-88) to Manual No. 108033-003Table 6-9. Parts for Expansion Unit Description Part Number1.

CONTENTSChapter 7REMOVAL AND REPLACEMENT PROCEDURES7.1 INTRODUCTION 7-17.2 MONITOR 7-27.3 KEYBOARD 7-57.4 POWER FUSE 7-67.5 PREPARING THE SYSTEM UNIT

7.14 SPEAKER ASSEMBLY AND SECURITY LOCK SWITCH 7-297.15 MASS STORAGE DEVICE(S) 7-33Removal and Replacement Procedures for Drive Positions A or D 7-34R

Maintenance and Service Guide 7-17.1 INTRODUCTIONThis chapter contains module-level removal and replacement procedures for the COMPAQ DESKPRO 386

7-2 Chapter 7, Removal and Replacement Procedures 7.2 MONITOR The following procedures apply to the C

Maintenance and Service Guide 7-3Figure 7-2. COMPAQ Color Monitor (Installed).Figure 7-3. COMPAQ Video Graphics Color Monitor (Installed).

7-4 Chapter 7, Removal and Replacement Procedures Figure 7-4. COMPAQ Video Graphics Monochrome Moni-tor (Installed).4. Remove the monitor cables fr

Maintenance and Service Guide 7-57.3 KEYBOARDTo remove the keyboard, follow these steps:1. Turn OFF the computer.CAUTIONThe system unit power shou

7-6 Chapter 7, Removal and Replacement Procedures 7.4 POWER FUSENew power fuses are available in the fuse kit (part no. 102930-001). The power fuse i

Maintenance and Service Guide 7-7To replace the power fuse, follow these steps:CAUTIONBe sure that the fuse clips fit tightly to ensure a good elect

7-8 Chapter 7, Removal and Replacement Procedures 7.5 PREPARING THE SYSTEM UNIT FOR THE INTERNAL REMOVAL AND REPLACEMENT PROCEDURESTo prepare the

Maintenance and Service Guide 7-97.6 SYSTEM UNIT COVER AND INTERNAL CONFIGURATIONTo remove the system unit cover, follow these steps:1. Complete t

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 o

Maintenance and Service Guide 7-11Figure 7-10. Overhead View of the COMPAQ DESKPRO 386 Personal Computer with the System Unit Cover Removed.

xvFIGURES5-1. Memory Error Locations on the 32-Bit System Memory Board 5-315-2. Memory Error Locations on the 1- to 2-Megabyte 32-Bit Memory Board 5

7-12 Chapter 7, Removal and Replacement Procedures 7.7 POWER SUPPLYThe power supply is attached to the system board by a power supply cable and conne

Maintenance and Service Guide 7-133. Remove the four screws that secure the power supply assembly to the chassis (Figure 7-12).Figure 7-12. Remov

7-14 Chapter 7, Removal and Replacement Procedures 5. Shift the power supply slightly away from the system board to locate the power supply connecto

Maintenance and Service Guide 7-157.8 BATTERYThe battery is secured to the system unit chassis with a VELCRO strip and is connected to the system b

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 t

Maintenance and Service Guide 7-174. Remove the battery from the system unit (Figure 7-17).5. To dispose of the battery properly, see Service B

7-18 Chapter 7, Removal and Replacement Procedures 7.9 SECURITY LOCKThe security lock secures the security lock as-sembly to the system unit cover. Y

Maintenance and Service Guide 7-197.10 EXPANSION BOARD(S)The following procedures apply to each board.To remove an expansion board, follow these st

7-20 Chapter 7, Removal and Replacement Procedures 3. Remove the RF shield (Figure 7-20).Figure 7-20. Location of the RF Shield.4. Remove the cable

Maintenance and Service Guide 7-215. Remove the retaining screw that secures the expansion board to the chassis.6. Disconnect any signal cables a

xvi7-9. Removing the System Unit Cover 7-107-10. Overhead View of the COMPAQ DESKPRO 386 Personal Computer with the System Unit Cover Removed

7-22 Chapter 7, Removal and Replacement Procedures Figure 7-24. Removing the Fixed Disk Drive Controller Board Signal Cables.7. Lift the board out o

Maintenance and Service Guide 7-237.11 80287 COPROCESSORThe 80287 coprocessor is installed on the system board under slots 1, 2, and 3.To remove th

7-24 Chapter 7, Removal and Replacement Procedures To replace the 80287 coprocessor, follow these steps:1. Align the pins on the 80287 coprocessor

Maintenance and Service Guide 7-252. Remove the five mounting screws holding the memory expansion board to the 32-bit system memory board.3. Gentl

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-megaby

Maintenance and Service Guide 7-27CAUTIONThe memory chips are sensitive to static electricity and are shipped on conductive foam to pro

7-28 Chapter 7, Removal and Replacement Procedures To replace a memory chip, follow these steps:CAUTIONThe pins on the chips bend easily. Careful

Maintenance and Service Guide 7-292. Be sure that all the pins are in the socket and that none are bent.3. Press the chip into place.4. Complete

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/Boa

Maintenance and Service Guide 7-314. Locate and disconnect the speaker connector (J115) and security lock switch connector (J119) from the system

xvii7-30. Location of the Speaker/Board Guide Assembly 7-307-31. Removing the Speaker/Board Guide Assembly 7-307-32. Location of the Speaker Connector

7-32 Chapter 7, Removal and Replacement Procedures 5. Carefully remove the speaker assembly from the speaker/board guide assembly (Figure 7-33).Fig

Maintenance and Service Guide 7-337.15 MASS STORAGE DEVICE(S)Mass storage devices can be installed in positions A, B, C, and D (Figure 7-35) in sev

7-34 Chapter 7, Removal and Replacement Procedures Removal and Replacement Procedures for Drive Positions A or DTo remove a mass storage device from

Maintenance and Service Guide 7-353. Remove the mounting screws on the left side of the appropriate drive housing as-sembly (Figure 7-37).Figure 7

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 prec

Maintenance and Service Guide 7-37Addendum 108431-001 (11-88) to Manual No. 108033-0032. Locate and disconnect the signal cable and the power cabl

7-38 Chapter 7, Removal and Replacement Procedures Addendum 108431-001 (11-88) to Manual No. 108033-003To replace a full-height mass storage device i

Maintenance and Service Guide 7-39Addendum 108431-001 (11-88) to Manual No. 108033-003NOTE: Software supports drive types in the following manner:

7-40 Chapter 7, Removal and Replacement Procedures Addendum 108431-001 (11-88) to Manual No. 108033-0032. Locate and disconnect the universal power

Maintenance and Service Guide 7-41Addendum 108431-001 (11-88) to Manual No. 108033-003Figure 7-43. Location of the Power Cable Connectors, Battery

xviii7-46. Removing the System Board 7-447-47. Removing the 80387 Coprocessor 7-467-48. Aligning the 80387 Coprocessor 7-478-1. COMPAQ DESKPRO 386 Per

7-42 Chapter 7, Removal and Replacement Procedures Addendum 108431-001 (11-88) to Manual No. 108033-0033. Locate and disconnect the security lock sw

Maintenance and Service Guide 7-43Addendum 108431-001 (11-88) to Manual No. 108033-003Figure 7-45. Location of the Security Lock Switch Connector,

7-44 Chapter 7, Removal and Replacement Procedures Addendum 108431-001 (11-88) to Manual No. 108033-0034. Remove the ten mounting screws that secure

Maintenance and Service Guide 7-45Addendum 108431-001 (11-88) to Manual No. 108033-0037.17 INTEL 387 COPROCESSORRemoving and replacing the Intel 38

7-46 Chapter 7, Removal and Replacement Procedures Addendum 108431-001 (11-88) to Manual No. 108033-0032. Insert the prongs of the coprocessor remov

Maintenance and Service Guide 7-47Addendum 108431-001 (11-88) to Manual No. 108033-003To replace the 387 Coprocessor, follow these steps:CAUTIONTh

7-48 Chapter 7, Removal and Replacement Procedures Addendum 108431-001 (11-88) to Manual No. 108033-003CAUTIONMore pressure is needed to press the

Maintenance and Service Guide 7-49Addendum 108431-001 (11-88) to Manual No. 108033-0037.18 LOST KEYIf the key for a COMPAQ DESKPRO 386 Personal Co

7-50 Chapter 7, Removal and Replacement Procedures Addendum 108431-001 (11-88) to Manual No. 108033-0037.19 300-/600-MEGABYTE FIXED DISK DRIVE EXPANS

Maintenance and Service Guide 7-51Addendum 108431-001 (11-88) to Manual No. 108033-003Fixed Disk Drive UnitTo remove a fixed disk drive from an expa

xix8-14. Setting for an RGBI Color Monitor or a COMPAQ Dual-Mode Monitor 8-278-15. Jumper Locations for the Video Display Controller Board (assy. no

7-52 Chapter 7, Removal and Replacement Procedures Addendum 108431-001 (11-88) to Manual No. 108033-0034. Remove the three retaining screws securing

Maintenance and Service Guide 7-53Addendum 108431-001 (11-88) to Manual No. 108033-003To remove the terminating resistor, complete the following st

7-54 Chapter 7, Removal and Replacement Procedures Addendum 108431-001 (11-88) to Manual No. 108033-003Power SupplyTo remove the power supply from th

Maintenance and Service Guide 7-55Addendum 108431-001 (11-88) to Manual No. 108033-003External Interface Adapter BoardTo remove the external interf

7-56 Chapter 7, Removal and Replacement Procedures Addendum 108431-001 (11-88) to Manual No. 108033-0034. Remove the external interface adapter boar

CONTENTSChapter 8JUMPER SETTINGS AND SWITCH SETTINGS8.1 INTRODUCTION 8-18.2 SYSTEM BOARDS 8-28.2 32-BIT SYSTEM MEMORY BOARD 8-68.4 .5- TO 2-MEGABYTE 1

8.10 COMPAQ ENHANCED COLOR GRAPHICS BOARD 8-22Configuration Switch Bank SW1 8-24Configuration Switch Bank SW2 8-26Configuration Switch Bank SW3 8-27Jumpe

Maintenance and Service Guide 8-18.1 INTRODUCTIONThis chapter shows the switch and jumper loca-tions on the following:□ System board□ 32-bit syst

8-2 Chapter 8, Jumper Settings and Switch Settings 8.2. SYSTEM BOARDSFigure 8-1. COMPAQ DESKPRO 386 Personal Computer System Board Version 1 (assy.

Maintenance and Service Guide 8-3Table 8-1. System Board (assy. no. 000401) Switch SettingsSwitch Position NumberSwitch Positions Function1 ON Rese

xxTABLES4-1. Matrix of Possible Tests for Various System Video Configurations 4-75-1. Power-On Self-Test Error Messages 5-15-2. Advanced Diagnostics E

8-4 Chapter 8, Jumper Settings and Switch Settings Figure 8-2. COMPAQ DESKPRO 386 System Board Version 2 (assy. no. 000558).

Maintenance and Service Guide 8-5Table 8-3. System Board (assy. no. 000558) Switch SettingsSwitch Position NumberSwitch Positions Function1 ON Rese

8-6 Chapter 8, Jumper Settings and Switch Settings 8.3 32-BIT SYSTEM MEMORY BOARDFigure 8-3. 32-Bit System Memory Board (assy. no. 000413).

Maintenance and Service Guide 8-7Table 8-5. Jumper Settings for the 32-Bit System Memory Board (assy. no. 000413) Jumper Selection Function Memor

8-8 Chapter 8, Jumper Settings and Switch Settings 8.4 .5- TO 2-MEGABYTE 16-BIT MEMORY EXPANSION BOARDFigure 8-4. .5- to 2-Megabyte 16-Bit Memory Ex

Maintenance and Service Guide 8-9Table 8-6. Jumper Settings for the .5- to 2-Megabyte 16-Bit Memory Expansion BoardJumper Selection FunctionE1 t

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- t

Maintenance and Service Guide 8-11Bank 3 EnabledWhen pin 1 to pin 2 is jumpered, Bank 3 (socketed memory) is accessed normally by the system. If

8-12 Chapter 8, Jumper Settings and Switch Settings 8.6 ESDI FIXED DISK DRIVE CONTROLLER BOARDFigure 8-7. ESDI Fixed Disk Drive Controller Board (as

Maintenance and Service Guide 8-13Table 8-9. Jumper Settings for the ESDI Fixed Disk Drive Controller Board (assy. no. WD1005WAH).Jumper Jumper Po

xxi8-7. Memory Configuration for Jumper Settings E1-E2 and E5-E6 for the .5- to 2-Megabyte 16-Bit Memory Expansion Board 8-98-8. Jumper Settings for

8-14 Chapter 8, Jumper Settings and Switch Settings 8.7 MULTIPURPOSE FIXED DISK DRIVE CONTROLLER BOARDSFigure 8-8. Multipurpose Fixed Disk Drive Con

Maintenance and Service Guide 8-15Table 8-10. Shunt Jumper and Switch Settings for the Multipurpose Fixed Disk Drive Controller Board (assy. no. 00

8-16 Chapter 8, Jumper Settings and Switch Settings Figure 8-9. Multipurpose Fixed Disk Drive Controller Board (assy. no. 000519 and 000815).

Maintenance and Service Guide 8-17Table 8-11. Switch Settings for the Multipurpose Fixed Disk Drive Controller Board (assy. no. 000519 and 000815)

8-18 Chapter 8, Jumper Settings and Switch Settings 8.8. FIXED DISK DRIVE CONTROLLER BOARDFigure 8-10. Fixed Disk Drive Controller Board (assy. no. W

Maintenance and Service Guide 8-19Table 8-12. Jumper Settings for the Fixed Disk Drive Controller Board (assy. no. WD1002WAH) Jumper Jumper Pos

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

Maintenance and Service Guide 8-21Table 8-13. Switch Settings for the Host Adapter Board 1 2 3 4 5 6 7 8 FunctionON OFFOFF ONInterrupt sele

8-22 Chapter 8, Jumper Settings and Switch Settings 8.10 COMPAQ ENHANCED COLOR GRAPHICS BOARDFigure 8-12. COMPAQ Enhanced Color Graphics Boards (assy

Maintenance and Service Guide 8-23The COMPAQ Enhanced Color Graphics Board has two banks of configuration switches (SW1 and SW2) as well as two jump

8-24 Chapter 8, Jumper Settings and Switch Settings Configuration Switch Bank SW1The setting for configuration switch bank SW1 is determined by whether

Maintenance and Service Guide 8-25Table 8-14. SW1 Settings for the COMPAQ Enhanced Color Graphics Board as the Secondary Video Display Controller

8-26 Chapter 8, Jumper Settings and Switch Settings Configuration Switch Bank SW2The setting for configuration switch bank SW2 is determined by the mon

Maintenance and Service Guide 8-27Configuration Switch Bank SW3If the SW3 switches are present, they are reserved and should be set to the OFF posi

8-28 Chapter 8, Jumper Settings and Switch Settings 8.11 VIDEO DISPLAY CONTROLLER BOARDSThe COMPAQ video display controller boards (assy. no. 000031

Maintenance and Service Guide 8-29Figure 8-16. Jumper Locations for the Video Display Controller Board (assy. no. 000160).Figure 8-17. Jumper Loc

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

Maintenance and Service Guide 8-31Addendum 108431-001 (11-88) to Manual No. 108033-0038.12 COMPAQ VIDEO GRAPHICS CONTROLLER BOARDFigure 8-19. Jumpe

8-32 Chapter 8, Jumper Settings and Switch Settings Addendum 108431-001 (11-88) to Manual No. 108033-0038.13 ASYNCHRONOUS COMMUNICATIONS/PARALLEL PR

Maintenance and Service Guide 8-33Addendum 108431-001 (11-88) to Manual No. 108033-003Figure 8-20. Asynchronous Communications/Parallel Printer Boa

CONTENTSChapter 1OPERATING AND PERFORMANCE SPECIFICATIONS1.1 INTRODUCTION 1-11.2 COMPAQ DESKPRO 386 PERSONAL COMPUTER SYSTEM UNIT 1-21.3 COMPAQ ENHANC

8-34 Chapter 8, Jumper Settings and Switch Settings Addendum 108431-001 (11-88) to Manual No. 108033-003Table 8-21. Asynchronous Communications/Paral

Maintenance and Service Guide 8-35Addendum 108431-001 (11-88) to Manual No. 108033-003Figure 8-21. Asynchronous Communications/Parallel Printer Boa

8-36 Chapter 8, Jumper Settings and Switch Settings Addendum 108431-001 (11-88) to Manual No. 108033-0038.14 300-/600-MEGABYTE FIXED DISK DRIVE EXPA

Maintenance and Service Guide 8-37Addendum 108431-001 (11-88) to Manual No. 108033-003Figure 8-22. ESDI External Fixed Disk Drive Controller Board.

CONTENTSChapter 9MASS STORAGE CONFIGURATIONS9.1 THEORY OF OPERATION 9-19.2 SYSTEM CONFIGURATION 9-2Maximum Storage 9-2Mirroring 9-4Duplexing 9-59.2 SE

Maintenance and Service Guide 9-1Addendum 108431-001 (11-88) to Manual No. 108033-0039.1 THEORY OF OPERATIONThe 300-/600-Megabyte Fixed Disk Drive

9-2 Chapter 9, Mass Storage Configuration Addendum 108431-001 (11-88) to Manual No. 108033-003□ Duplexing. The main difference between mirroring and

Maintenance and Service Guide 9-3Addendum 108431-001 (11-88) to Manual No. 108033-003For MS-DOS (with the device driver) to support any two interna

9-4 Chapter 9, Mass Storage Configuration Addendum 108431-001 (11-88) to Manual No. 108033-003MirroringIMPORTANTNovell Netware software must be used w

Maintenance and Service Guide 9-5Addendum 108431-001 (11-88) to Manual No. 108033-003DuplexingIMPORTANTNovell Netware software must be used when se

9-6 Chapter 9, Mass Storage Configuration Addendum 108431-001 (11-88) to Manual No. 108033-0039.3 SETTING UP THE EXTERNAL FIXED DISK DRIVE EXPANSION

Maintenance and Service Guide 9-7Addendum 108431-001 (11-88) to Manual No. 108033-003Use the FDISK utility to partition each fixed disk drive that

9-8 Chapter 9, Mass Storage Configuration Addendum 108431-001 (11-88) to Manual No. 108033-003□ SFT II (disk duplexing) goes beyond disk mirroring in

Maintenance and Service Guide 9-9Addendum 108431-001 (11-88) to Manual No. 108033-003□ NVCPQDSK is for use with mirrored or duplexed disk configura

9-10 Chapter 9, Mass Storage Configuration Addendum 108431-001 (11-88) to Manual No. 108033-0033. Install the external fixed disk drive con-troller. R

Maintenance and Service Guide 9-11Addendum 108431-001 (11-88) to Manual No. 108033-0037. If you applied the patch, place the patched files on the w

9-12 Chapter 9, Mass Storage Configuration Addendum 108431-001 (11-88) to Manual No. 108033-003From the A > prompt, enter the following commands:

Maintenance and Service Guide A-1Addendum 108431-001 (11-88) to Manual No. 108033-003AAdvanced Diagnostics Diskette 2-2, 3-1, 3-2Advanced Diagnost

Maintenance and Service Guide 1-11.1 INTRODUCTIONThis chapter provides operating and performance specifications for the following components of and

A-2 Appendix A, IndexAddendum 108431-001 (11-88) to Manual No. 108033-003EEnhanced Color Graphics Board 8-22Enhanced Color Graphics Error Codes 5-2

Maintenance and Service Guide A-3Addendum 108431-001 (11-88) to Manual No. 108033-003IIllustrated Parts Catalog 6-1300-/600-Megabyte Fixed Disk Dr

A-4 Appendix A, IndexAddendum 108431-001 (11-88) to Manual No. 108033-003MMass Storage Configurations 9-1Setting Up The External Fixed Disk Dri

Maintenance and Service Guide A-5Addendum 108431-001 (11-88) to Manual No. 108033-003PParallel Interface Test 4-6Parallel Printer Error Codes 5-1

A-6 Appendix A, IndexAddendum 108431-001 (11-88) to Manual No. 108033-003Run the SETUP Program (Advanced Diagnostics) 4-3SSerial Error Codes

Maintenance and Service Guide A-7Addendum 108431-001 (11-88) to Manual No. 108033-003TTerminating Resistor 7-53Test Selection Menu 4-5Asynchronou

1-2 Chapter 1, Operating and Performance Specifications1.2 COMPAQ DESKPRO 386 PERSONAL COMPUTER SYSTEM UNITDimensions:Height: Depth: Width:6.35 in.

Maintenance and Service Guide 1-31.3 COMPAQ ENHANCED KEYBOARDDimensions: Height: Depth: Width:8.30 in. (21.1 cm) 1.50 in. ( 3.8 cm) 19.25 in. (48.

NOTICEThe information in this guide is subject to change without notice.COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR TECH-NICAL OR EDITORIAL ER

1-4 Chapter 1, Operating and Performance Specifications1.5 COMPAQ DUAL-MODE MONITORDimensions: Height: Depth: Width: 10.25 in. (26.0 cm) 13.75 in.

Maintenance and Service Guide 1-51.6 COMPAQ COLOR MONITORDimensions:Height: Depth: Width:11.8 in. (30.0 cm) 15.0 in. (38.1 cm) 13.9 in. (35.3 cm)We

1-6 Chapter 1, Operating and Performance Specifications1.7 COMPAQ VIDEO GRAPHICS COLOR MONITORDimensions:Height: Depth: Width:14.1 in. (35.7 cm) 14

Maintenance and Service Guide 1-7Power Requirements:Volts:North American:International: Amperes:North American:International: Wattage:115 VAC, 60 H

1-8 Chapter 1, Operating and Performance Specifications1.8 COMPAQ VIDEO GRAPHICS MONOCHROME MONITORDimensions:Height: Depth: Width:10.2 in. (26.0 c

Maintenance and Service Guide 1-9Power Cable:Length, attached: North American: International:Length, detachable: North American: International:Cabl

1-10 Chapter 1, Operating and Performance Specifications1.9 360-KBYTE 5¼-INCH DISKETTE DRIVEDimensions:Height:Depth:Width:1.62 in. ( 4.1 cm)8.25 i

Maintenance and Service Guide 1-111.10 1.2-MEGABYTE 5¼-INCH DISKETTE DRIVE Dimensions: Height: Depth: Width:1.62 in. ( 4.1 cm) 8.25 in. (21.0 cm)

1-12 Chapter 1, Operating and Performance Specifications1.11 1.44-MEGABYTE 3½-INCH DISKETTE DRIVEDimensions:Height:Depth:Width:1.62 in. (4.1 cm)8.2

Maintenance and Service Guide 1-131.12 40-MEGABYTE FIXED DISK DRIVEDimensions:Height:Depth:Width:1.6 in. ( 4.1 cm)8.8 in. (22.4 cm)5.8 in. (14.6 c

ii WARNINGThis equipment has been certified to comply with the limits for a Class B computing device, pursuant to Subpart J of Part 15 of F

1-14 Chapter 1, Operating and Performance Specifications1.13 70-MEGABYTE FIXED DISK DRIVEDimensions:Height:Depth:Width:3.38 in. ( 8.6 cm) 8.00 in.

Maintenance and Service Guide 1-151.14 130-MEGABYTE FIXED DISK DRIVEDimensions: Height: Depth: Width:3.38 in. ( 8.6 cm) 8.00 in. (20.3 cm) 5.87 in

1-16 Chapter 1, Operating and Performance Specifications1.15 40-MEGABYTE FIXED DISK DRIVE BACKUPDimensions: Height:Depth:Width:1.62 in. ( 4.1 cm)8

Maintenance and Service Guide 1-171.16 135-MEGABYTE FIXED DISK DRIVE BACKUP (TAPE) Dimensions: Height: Depth: Width:1.62 in. ( 4.1 cm) 8.50 in. (21

1-18 Chapter 1, Operating and Performance Specifications1.17 300-/600-MEGABYTE FIXED DISK DRIVE EXPANSION UNITDimensions: Height: Depth: Width: 6.

Maintenance and Service Guide 1-191.18 300-MEGABYTE FIXED DISK DRIVE FOR THE EXPANSION UNIT Dimensions: Height: Depth: Width:3.25 in. ( 8.3 cm)

CONTENTSChapter 2POWER-ON SELF-TEST (POST)/PROBLEM ISOLATION2.1 INTRODUCTION 2-12.2 POWER-ON SELF-TEST (POST) 2-12.3 PRELIMINARY STEPS TO PROBLEM ISOL

Maintenance and Service Guide 2-12.1 INTRODUCTIONThis chapter provides a list of the subassemblies that are tested by the Power-On Self-Test (POST

iiiNOTICECompaq Computer Corporation requires that all peripheral devices be connected to this computer via shielded cables with metal RFI/EMI connec

2-2 Chapter 2, Power-On Self-Test (Post)/Problem Isolation2.3 PRELIMINARY STEPS TO PROBLEM ISOLATIONIf you encounter an error condition, complete t

Maintenance and Service Guide 2-3Complete Preliminary Steps.Turn AC powerswitch ON.Did thecursor appearon themonitor?To BPage 2-5To APage 2-4NoYes

2-4 Chapter 2, Power-On Self-Test (Post)/Problem IsolationAdjustbrightness knoband restart.Did thecursor appearon themonitor?To BPage 2-5To CPage 2

Maintenance and Service Guide 2-5See Chapter 5ERRORMESSAGESAND CODES.Did you hear1 or 2short beeps?To DPage 2-7NoDid anerror codeappear on themonit

2-6 Chapter 2, Power-On Self-Test (Post)/Problem IsolationIs theAC powerfuse good?Is thesystem LEDlit?CIf replacing the power supply, did not the s

Maintenance and Service Guide 2-7Is the speakerassemblyconnected?Did youhear otheraudible errorcodes (beeps)?DReplace thespeakerand restart.See Cha

2-8 Chapter 2, Power-On Self-Test (Post)/Problem IsolationEE1. Verify that all signal cables are connected.2. Replace the following devices in o

CONTENTSChapter 3 SETUP PROGRAM3.1 WHEN TO RUN SETUP 3-13.2 HOW TO RUN SETUP 3-2Addendum 108431-001 (11-88) to Manual No. 108033-003

Maintenance and Service Guide 3-1The COMPAQ personal computer uses a memory device that stores the current date, time, and system configuration. The

ivPREFACEThe COMPAQ DESKPRO 386 PERSONAL COMPUTER MAINTENANCE AND SERVICE GUIDE is a troubleshooting, maintenance, and repair guide that can be

3-2 Chapter 3, Setup Program 3.2 HOW TO RUN SETUPTo run SETUP, follow these instructions:1. Insert either ADVANCED DIAGNOSTICS or USER DIAGNOSTICS d

CONTENTSChapter 4 ADVANCED DIAGNOSTICS PROGRAM4.1 PRELIMINARY STEPS 4-14.2 MAIN MENU 4-2Run the Diagnostic Tests 4-2Format a Diskette 4-3Run the SETUP

4.4 TEST SELECTION MENU ContinuedVideo 4-6Video Controller 4-8Display Characteristics 4-8Character Set 4-880 x 25 Display 4-840 x 25 Display 4-9320 x

4.4 TEST SELECTION MENU ContinuedDiskette Drive 4-17Write/Read/Compare 4-17Random Seek 4-17Verify Diskette 4-17Diskette Speed 4-17Diskette Change Line

4.4 TEST SELECTION MENU ContinuedFixed Disk DriveFormat Menu 4-21Conditional Format 4-22Unconditional Format 4-22Surface Analysis 4-23Change Interleav

Maintenance and Service Guide 4-1Addendum 108431-001 (11-88) to Manual No. 108033-003This chapter describes the ADVANCED DIAGNOSTICS program for t

4-2 Chapter 4, Advanced Diagnostics Program Addendum 108431-001 (11-88) to Manual No. 108033-0036. Turn on the computer and monitor. Once POST comp

Maintenance and Service Guide 4-3Addendum 108431-001 (11-88) to Manual No. 108033-003Format a DisketteThe ADVANCED DIAGNOSTICS program requires th

4-4 Chapter 4, Advanced Diagnostics Program Addendum 108431-001 (11-88) to Manual No. 108033-0034.3 ADVANCED DIAGNOSTICS PROGRAMSystem Test MenuWhen

Maintenance and Service Guide 4-5Addendum 108431-001 (11-88) to Manual No. 108033-0034.4 TEST SELECTION MENUThe Test Selection Menu selections vary

vSUMMARY OF TEXTThe COMPAQ DESKPRO 386 MAINTENANCE AND SERVICE GUIDE con- tains the following eight chapters:Chapter 1 OPERATING AND PERFORM

4-6 Chapter 4, Advanced Diagnostics Program Addendum 108431-001 (11-88) to Manual No. 108033-003MemoryThe Memory test verifies memory data patterns, m

Maintenance and Service Guide 4-7Addendum 108431-001 (11-88) to Manual No. 108033-003Table 4-1. Matrix of Possible Video Tests Video Cont

4-8 Chapter 4, Advanced Diagnostics Program Addendum 108431-001 (11-88) to Manual No. 108033-003The following paragraphs describe the tests for the v

Maintenance and Service Guide 4-9Addendum 108431-001 (11-88) to Manual No. 108033-003The screen for the 80 x 25 low-resolution charac-ter display m

4-10 Chapter 4, Advanced Diagnostics Program Addendum 108431-001 (11-88) to Manual No. 108033-003320 x 200 Standard GraphicsThe 320 x 200 Standard Gr

Maintenance and Service Guide 4-11Addendum 108431-001 (11-88) to Manual No. 108033-003LightpenThe Lightpen selection verifies that the lightpen is o

4-12 Chapter 4, Advanced Diagnostics Program Addendum 108431-001 (11-88) to Manual No. 108033-003Gray Scale/ColorThe Gray Scale/Color selection verifi

Maintenance and Service Guide 4-13Addendum 108431-001 (11-88) to Manual No. 108033-003Enhanced Display CharacteristicsThe Enhanced Display Characte

4-14 Chapter 4, Advanced Diagnostics Program Addendum 108431-001 (11-88) to Manual No. 108033-003640 x 350 Color GraphicsThe 640 x 350 Color Graphics

Maintenance and Service Guide 4-15Addendum 108431-001 (11-88) to Manual No. 108033-003Monochrome TextThe Monochrome Text selection verifies that the

viChapter 6 ILLUSTRATED PARTS CATALOG contains illustrated part breakdowns, order numbers, and part names for the COMPAQ DESKPRO 386 Personal Com

4-16 Chapter 4, Advanced Diagnostics Program Addendum 108431-001 (11-88) to Manual No. 108033-003640 x 480 GraphicsThe 640 x 480 Graphics selection v

Maintenance and Service Guide 4-17Addendum 108431-001 (11-88) to Manual No. 108033-003Monitor AlignmentThe Monitor Alignment selection allows you t

4-18 Chapter 4, Advanced Diagnostics Program Addendum 108431-001 (11-88) to Manual No. 108033-003Diskette Change LineThe Diskette Change Line selecti

Maintenance and Service Guide 4-19Addendum 108431-001 (11-88) to Manual No. 108033-003ModemThe Modem test runs a series of other tests that verify

4-20 Chapter 4, Advanced Diagnostics Program Addendum 108431-001 (11-88) to Manual No. 108033-003Modem Direct ConnectThe Modem Direct Connect selecti

Maintenance and Service Guide 4-21Addendum 108431-001 (11-88) to Manual No. 108033-003Head SelectThe Head Select selection verifies that each head o

4-22 Chapter 4, Advanced Diagnostics Program Addendum 108431-001 (11-88) to Manual No. 108033-003IMPORTANTBecause several of these selections destro

Maintenance and Service Guide 4-23Addendum 108431-001 (11-88) to Manual No. 108033-003NOTE: An Unconditional Format should be performed only if y

4-24 Chapter 4, Advanced Diagnostics Program Addendum 108431-001 (11-88) to Manual No. 108033-003Fixed Disk Drive Backup (Tape)The Fixed Disk Drive B

Maintenance and Service Guide 4-25Addendum 108431-001 (11-88) to Manual No. 108033-003Fixed Disk Drive BackupThe Fixed Disk Drive Backup selection

viiREQUIRED TOOLS AND SUPPLIESTo service the COMPAQ DESKPRO 386 Personal Computer, you need:□ Torx T-10 screwdriver□ Torx T-15 screwdriver□ Small P

CONTENTSChapter 5ERROR MESSAGES AND CODES5.1 INTRODUCTION 5-15.2 POWER-ON SELF-TEST ERROR MESSAGES 5-15.3 ADVANCED DIAGNOSTICS ERROR CODES 5-45.4 MEMO

Maintenance and Service Guide 5-1Addendum 108431-001 (11-88) to Manual No. 108033-003[ page missing ]

5-2 Chapter 5, Error Messages and Codes Addendum 108431-001 (11-88) to Manual No. 108033-003[ page missing ]

Maintenance and Service Guide 5-3Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-1. Power-On Self-Test Error Messages ContinuedMessage

5-4 Chapter 5, Error Messages and Codes Addendum 108431-001 (11-88) to Manual No. 108033-0035.3 ADVANCED DIAGNOSTICS ERROR CODESADVANCED DIAGNOSTICS

Maintenance and Service Guide 5-5Addendum 108431-001 (11-88) to Manual No. 108033-003[ page missing ]

5-6 Chapter 5, Error Messages and Codes Addendum 108431-001 (11-88) to Manual No. 108033-003[ page missing ]

Maintenance and Service Guide 5-7Addendum 108431-001 (11-88) to Manual No. 108033-003Table 5-2. Advanced Diagnostics Error Codes ContinuedError Cod