Compaq Deskpro 386 Personal Computer
Maintenance and Service Guide
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Maintenance and Service Guide
Page
Connector
Preface
Summary of Text
Page
Required Tools and Supplies
Additional Information
Contents
Setup Program
Illustrated Parts Catalog
Jumper Settings and Switch Settings
Mass Storage Configurations
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Figures
Xvi
Xvii
Xviii
Xix
Tables
Xxi
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Addendum 108431-001 11-88 to Manual No
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Introduction
Operating and Performance Specifications
Compaq Deskpro 386 Personal Computer System Unit
Compaq Enhanced Keyboard
84-KEY Keyboard
Compaq DUAL-MODE Monitor
Compaq Color Monitor
Compaq Video Graphics Color Monitor
Maintenance and Service Guide
Compaq Video Graphics Monochrome Monitor
Maintenance and Service Guide
360-KBYTE 5¼-INCH Diskette Drive
10 1.2-MEGABYTE 5¼-INCH Diskette Drive
11 1.44-MEGABYTE 3½-INCH Diskette Drive
12 40-MEGABYTE Fixed Disk Drive
13 70-MEGABYTE Fixed Disk Drive
14 130-MEGABYTE Fixed Disk Drive
15 40-MEGABYTE Fixed Disk Drive Backup
16 135-MEGABYTE Fixed Disk Drive Backup Tape
17 300-/600-MEGABYTE Fixed Disk Drive Expansion Unit
18 300-MEGABYTE Fixed Disk Drive for the Expansion Unit
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Contents
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POWER-ON SELF-TEST Post
POWER-ON SELF-TEST POST/PROBLEM Isolation
Problem Isolation Flowchart
Preliminary Steps to Problem Isolation
Complete Preliminary Steps Turn AC power Switch on Did Yes
Brightness
See Chapter
To E
Did you Yes Hear other Audible error Codes beeps?
Power-On Self-Test Post/Problem Isolation
When to RUN Setup HOW to RUN Setup
Page
When to RUN Setup
Setup Program
HOW to RUN Setup
Advanced Diagnostics Program
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Addendum 108431-001 11-88 to Manual No
Addendum 108431-001 11-88 to Manual No
Preliminary Steps
Advanced Diagnostics Program
Main Menu
Run the Diagnostic Tests
Clear Configuration and Run the Setup Program
Run the Setup Program
Format a Diskette
Display ROM Versions
System Test Menu
Advanced Diagnostics Program
Test Logging Utilities Menu
Processor
Test Selection Menu
Keyboard
Memory
Parallel Interface
Video
CGA DMM Color Mono MDA
Matrix of Possible Video Tests
Video Controller
Display Characteristics
80 x 25 Display
Character Set
40 x 25 Display
640 x 200 Standard Graphics
320 x 200 Standard Graphics
Display Memory Pages
Lightpen
Noise
Gray Scale/Color
640 x 200 Color Graphics
Enhanced Display Characteristics
640 x 350 Color Graphics
640 x 350 Monochrome Graphics
Monochrome Text
640 x 480 Graphics
Color Mode
Diskette Drive
Monochrome Video Board
Format a Diskette for diagnostic use only
Asynchronous Communications Interface
Diskette Change Line
Auto Answer Mode
Auto Originate Mode
Modem
Modem Internal Loopback
Modem Direct Connect
Fixed Disk Drive
Write/Read/Compare on Test Cylinder
Seek
Head Select
Error Detection and Correction
Run All the Above Tests
Read Verify
Unconditional Format
Conditional Format
Change Interleave
Surface Analysis
Display Current Interleave
Fixed Disk Drive Backup Tape
Fixed Disk Drive Backup Media
Fixed Disk Drive Backup
Enhanced Color Graphics
Video Graphics Controller
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Contents
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Missing
Error Messages and Codes
Diagnostics
Power-On Self-Test Error Messages
Advanced Diagnostics Error Codes
Missing
Missing
Advanced Diagnostics Error Codes
Advanced Diagnostics Error Codes
Advanced Diagnostics Error Codes
Advanced Diagnostics Error Codes
Advanced Diagnostics Error Codes
Advanced Diagnostics Error Codes
Advanced Diagnostics Error Codes
Advanced Diagnostics Error Codes
Advanced Diagnostics Error Codes
Advanced Diagnostics Error Codes
Advanced Diagnostics Error Codes
Advanced Diagnostics Error Codes
Advanced Diagnostics Error Codes
Advanced Diagnostics Error Codes
Advanced Diagnostics Error Codes
Advanced Diagnostics Error Codes
Advanced Diagnostics Error Codes
Advanced Diagnostics Error Codes
Advanced Diagnostics Error Codes
Advanced Diagnostics Error Codes
Advanced Diagnostics Error Codes
Advanced Diagnostics Error Codes
Advanced Diagnostics Error Codes
Advanced Diagnostics Error Codes
Memory Error Codes
Memory error codes in the following tables are in the format
Memory Error Locations on the 32-Bit System Memory Board
Addendum 108431-001 11-88 to Manual No
Maintenance and Service Guide
Extdisk Messages
Extdisk Messages
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Contents
Page
Illustrated Parts Catalog
Spare Parts List, U.S
Spare Parts LIST, U.S
Spare Parts List, U.S
Spare Parts List, U.S
MS-DOS Version 3.3 Reference Guide
Compaq Deskpro 386 Technical Reference Guide
Spare Parts List, U.S
Spare Parts List, U.S
Spare Parts List, International
Spare Parts LIST, International
System Unit
Parts List
System Unit Exterior and Battery
System Unit
System Unit Interior with Memory Options
System Unit
Maintenance and Service Guide
Compaq Enhanced Keyboard
Compaq Enhanced Keyboard
Missing
Missing
Compaq Video Graphics Color Monitor
Compaq Video Graphics Color Monitor
Compaq Video Graphics Monochrome Monitor
Compaq Video Graphics Monochrome Monitor
300-/600-MEGABYTE Fixed Disk Drive Expansion Unit Parts List
300-/600-Megabyte Fixed Disk Drive Expansion Unit
Parts for Expansion Unit
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Contents
Addendum 108431-001 11-88 to Manual No
Removal and Replacement Procedures
Monitor
Compaq Dual-Mode Monitor Installed
Compaq Color Monitor Installed
Compaq Video Graphics Monochrome Moni- tor Installed
Removing the Keyboard
Keyboard
Removing the Fuse Holder
Power Fuse
To replace the power fuse, follow these steps
Preparing
System Unit Cover and Internal Configuration
Removing the System Unit Cover
Maintenance and Service Guide
11.Location of the Power Supply Assembly
Power Supply
12.Removing the Power Supply Screws
Removal and Replacement Procedures
Battery
16.Location of the Battery Connector
17.Removing the Battery
18.Removing the Security Lock Interior View
Security Lock
19.Location of the Reinforcement Bracket
Expansion Boards
Remove the RF shield Figure Remove the cable cover Figure
Maintenance and Service Guide
25.Removing an Expansion Board
11 80287 Coprocessor
Memory Expansion Boards
Maintenance and Service Guide
Memory Chips
28.Removing the Memory Chip
To replace a memory chip, follow these steps
Speaker Assembly and Security Lock Switch
30.Location of the Speaker/Board Guide Assembly
Maintenance and Service Guide
33.Removing the Speaker Assembly
Mass Storage Devices
Configurations of Mass Storage Devices
Expansions Boards
38.Removing a Mass Storage Device from Position a
Power Cable Connections for Drive Positions a and D
40.Disconnecting Cables from Mass Storage Device B or C
Power Cable Connections for Drive Positions B and C
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System Board
Addendum 108431-001 11-88 to Manual No
Maintenance and Service Guide
Addendum 108431-001 11-88 to Manual No
Maintenance and Service Guide
46.Removing the System Board
Intel 387 Coprocessor
47.Removing the 387 Coprocessor
To replace the 387 Coprocessor, follow these steps
Keyboard g .2 Monitor Run the Setup program
Lost KEY
19 300-/600-MEGABYTE Fixed Disk Drive Expansion Unit
Fixed Disk Drive Unit
52.Fixed Disk Drive Retaining Screws
53.Locating and Removing Terminating Resistor
54.Power Supply Screws
Power Supply
External Interface Adapter Board
57.Removing Power Cables
Jumper Positions and Switch Settings
Bank 3 Enabled Bank 3 Disabled
Compaq Enhanced Color Graphics Board
Jumper Settings and Switch Settings
System Boards
System Board assy. no Switch Settings
Compaq Deskpro 386 System Board Version 2 assy. no
U13 Even
32-Bit System Memory Board assy. no
32-BIT System Memory Board
Jumper Settings for the 32-Bit System Memory Board assy. no
5- to 2-Megabyte 16-Bit Memory Expansion Board assy. no
5- to 2-MEGABYTE 16-BIT Memory Expansion Board
Maintenance and Service Guide
5a.1- to 2-Megabyte 32-Bit Memory Expansion Board assy. no
Bank 3 Disabled
Bank 3 Enabled
Esdi Fixed Disk Drive Controller Board assy. no. WD1005WAH
Esdi Fixed Disk Drive Controller Board
Jumper Jumper Position Function Not installed Reserved
Multipurpose Fixed Disk Drive Controller Boards
OFF
Multipurpose Fixed Disk Drive Controller Board assy. no
Maintenance and Service Guide
10.Fixed Disk Drive Controller Board assy. no. WD1002WAH
Fixed Disk Drive Controller Board
Maintenance and Service Guide
11.Host Adapter Board assy. no
Host Adapter Board
13. Switch Settings for the Host Adapter Board
12.COMPAQ Enhanced Color Graphics Boards assy. no
Compaq Enhanced Color Graphics Board
Maintenance and Service Guide
Configuration Switch Bank SW1
Maintenance and Service Guide
16 SW2 Settings for the Compaq Enhanced Color Graphics Board
Configuration Switch Bank SW2
Configuration Switch Bank SW3
Video Display Controller Boards
Maintenance and Service Guide
Jumper Settings and Switch Settings
Compaq Video Graphics Controller Board
Asynchronous COMMUNICATIONS/PARALLEL Printer Board
Maintenance and Service Guide
Disable = OFF
Maintenance and Service Guide
14 300-/600-MEGABYTE Fixed Disk Drive Expansion Unit
22.ESDI External Fixed Disk Drive Controller Board
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Theory of Operation System Configuration
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Theory of Operation
Mass Storage Configuration
Maximum Storage
System Configuration
System Configured for 1.2 Gigabytes
Mirroring
Duplexing
Fdisk Utility
Setting UP the External Fixed Disk Drive Expansion Unit
Novell Netware Configuration
Format Command
Do not use Cpqdsk or Nvcpqdsk for non- dedicated servers
Maintenance and Service Guide
COMPSURF.OBJ
Abend Not enough memory for disk FAT tables
From the a prompt, enter the following commands
Appendix a
Fixed Disk Drive see also Mass Storage Devices
Tape Adapter Board see Host Adapter Board
See Test Selection Menu
Maintenance and Service Guide
6Appendix A, Index
Maintenance and Service Guide
