Page 1 COMPAQ DESKPRO 386 Personal Computer MAINTENANCE AND SERVICE GUIDE...
Page 3: Compaq Deskpro 386 Personal Computer
, COMPAQ DESKPRO 386/25, ® ® COMPAQ DESKPRO 386/20e, and COMPAQ SLT/286 are trademarks of Compaq Computer Corporation. The software described in this guide is furnished under a license agreement of nondisclosure. The software may be used or copied only in accordance with the terms of the agreement.
Page 4 □ Plug the computer into a different AC receptacle so that the com- puter and the receiver with which it interferes are on different branch circuits. If necessary, consult an Authorized COMPAQ Computer Dealer or an experienced radio/television technician for additional suggestions.
Page 5 NOTICE Compaq Computer Corporation requires that all peripheral devices be connected to this computer via shielded cables with metal RFI/EMI connector hoods. WIRE TYPE: Multipaired overall-shielded; Belden #98XX; Alpha #54XX; or equivalent. CONNECTOR HOOD: RFI/EMI metal shield; AMP #74517X-X; or equivalent.
Page 6 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/module-level repair only.
Page 7 SUMMARY OF TEXT The COMPAQ DESKPRO 386 MAINTENANCE AND SERVICE GUIDE con- tains the following eight chapters: OPERATING AND PERFORMANCE SPECIFICATIONS pro- Chapter 1 vides operating and performance specifications for the COMPAQ DESKPRO 386 Personal Computer. Chapter 2 POWER-ON SELF-TEST (POST)/PROBLEM ISOLATION describes the internal system diagnostics programs that run automati- cally when you turn on the system.
Page 8 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.
Page 9 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) □...
Page 10: Additional Information
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 /BASIC VERSION 3.1 REFERENCE GUIDE...
Page 11: Table Of Contents
CONTENTS Chapter 1 OPERATING AND PERFORMANCE SPECIFICATIONS 1.1 INTRODUCTION 1.2 COMPAQ DESKPRO 386 PERSONAL COMPUTER SYSTEM UNIT 1.3 COMPAQ ENHANCED KEYBOARD 1.4 COMPAQ 84-KEY KEYBOARD 1.5 COMPAQ DUAL-MODE MONITOR 1.6 COMPAQ COLOR MONITOR 1.7 COMPAQ VIDEO GRAPHICS COLOR MONITOR 1.8 COMPAQ VIDEO GRAPHICS MONOCHROME MONITOR 1.9 360-KBYTE 5¼-INCH DISKETTE DRIVE...
Page 12 Chapter 2 POWER-ON SELF-TEST (POST)/PROBLEM ISOLATION 2.1 INTRODUCTION 2.2 POWER-ON SELF-TEST (POST) 2.3 PRELIMINARY STEPS TO PROBLEM ISOLATION 2.4 PROBLEM ISOLATION FLOWCHART Chapter 3 SETUP PROGRAM WHEN TO RUN SETUP HOW TO RUN SETUP Chapter 4 ADVANCED DIAGNOSTICS PROGRAM 4.1 PRELIMINARY STEPS 4.2 MAIN MENU 4.3 ADVANCED DIAGNOSTICS PROGRAM 4.4 TEST SELECTION MENU...
Page 13 Chapter 6 ILLUSTRATED PARTS CATALOG 6.1 INTRODUCTION 6.2 SPARE PARTS LIST, U.S. 6.3 SPARE PARTS LIST, INTERNATIONAL 6.4 PARTS LIST 6-10 6.5 300-/600-MEGABYTE FIXED DISK EXPANSION UNIT PARTS LIST 6-21 Chapter 7 REMOVAL AND REPLACEMENT PROCEDURES 7.1 INTRODUCTION 7.2 MONITOR 7.3 KEYBOARD 7.4 POWER FUSE 7.5 PRELIMINARY STEPS TO INTERNAL REMOVAL AND...
Page 14 8.7 MULTIPURPOSE FIXED DISK DRIVE CONTROLLER BOARDS 8-14 8.8 FIXED DISK DRIVE CONTROLLER BOARD 8-18 8.9 HOST ADAPTER BOARD 8-20 8.10 COMPAQ ENHANCED COLOR GRAPHICS BOARD 8-22 8.11 VIDEO DISPLAY CONTROLLER BOARD 8-28 8.12 COMPAQ VIDEO GRAPHICS CONTROLLER BOARD 8-31 8.13 ASYNCHRONOUS COMMUNICATIONS/PARALLEL...
Page 15 xiii Chapter 9 MASS STORAGE CONFIGURATIONS 9.1 THEORY OF OPERATION 9.2 SYSTEM CONFIGURATION 9.3 SETTING UP THE EXTERNAL FIXED DISK DRIVE EXPANSION UNIT Appendix A INDEX...
Page 17 6-9. COMPAQ Video Graphics Monochrome Monitor 6-21 7-1. COMPAQ Dual Mode Monitor (Installed) 7-2. COMPAQ Color Monitor (Installed) 7-3. COMPAQ Video Graphics Color Monitor (Installed) 7-4. COMPAQ Video Graphics Monochrome Monitor (Installed) 7-5. Removing the Keyboard 7-6. Removing the Fuse Holder 7-7.
Page 18 7-9. Removing the System Unit Cover 7-10 7-10. Overhead View of the COMPAQ DESKPRO 386 Personal Computer with the System Unit Cover Removed 7-11 7-11. Location of the Power Supply Assembly 7-12 7-12. Removing the Power Supply Screws 7-13 7-13. Removing the Power Supply Assembly 7-13 7-14.
Page 19 7-41 7-44. Location of the Security Lock Switch Connector, Keyboard Connector, and Speaker Connector on the COMPAQ DESKPRO 386 System Board Version 1 (assy. no. 000401) 7-42 7-45. Location of the Security Lock Switch Connector, Keyboard Connector, and Speaker Connector on the COMPAQ DESKPRO 386 System Board Version 2 (assy.
Page 20 7-47 8-1. COMPAQ DESKPRO 386 Personal Computer System Board Version 1 (assy. no. 000401) 8-2. COMPAQ DESKPRO 386 System Board Version 2 (assy. no. 000558) 8-3. 32-Bit System Memory Board (assy. no. 000413) 8-4. .5- to 2-Megabyte 16-Bit Memory Expansion Board (assy.
Page 21 Controller Board (assy. no. 000345) 8-29 8-18. Jumper Locations for the Video Display Controller Board (assy. no. 000525) 8-30 8-19. Jumper Locations on the COMPAQ Video Graphics Controller Board (assy. 109360) 8-31 8-20. Asynchronous Communications/Parallel Printer Board (assy. no. 000570)
Page 22 6-5. 84-Key Keyboard 6-17 6-6. COMPAQ Dual-Mode Monitor 6-18 6-7. COMPAQ Color Monitor 6-19 6-8. COMPAQ Video Graphics Color Monitor 6-20 6-9. COMPAQ Video Graphics Monochrome Monitor 6-21 7-1. Configurations of Mass Storage Devices 7-33 7-2. Power Cable Connections for Drive Positions A and D 7-36 7-3.
Page 23 8-14. SW1 Settings for the COMPAQ Enhanced Color Graphics Board as the Only or Primary Video Display Controller Board 8-24 8-15. SW1 Settings for the COMPAQ Enhanced Color Graphics Board as the Secondary Video Display Controller Board 8-25 8-16. SW2 Settings for the COMPAQ Enhanced...
Page 25: Compaq Enhanced Keyboard
CONTENTS Chapter 1 OPERATING AND PERFORMANCE SPECIFICATIONS 1.1 INTRODUCTION 1.2 COMPAQ DESKPRO 386 PERSONAL COMPUTER SYSTEM UNIT 1.3 COMPAQ ENHANCED KEYBOARD 1.4 COMPAQ 84-KEY KEYBOARD 1.5 COMPAQ DUAL-MODE MONITOR 1.6 COMPAQ COLOR MONITOR 1.7 COMPAQ VIDEO GRAPHICS COLOR MONITOR 1.8 COMPAQ VIDEO GRAPHICS MONOCHROME MONITOR 1.9 360-KBYTE 5¼-INCH DISKETTE DRIVE...
Page 27: Operating And Performance Specifications
□ 3½-Inch 1.44-Megabyte Diskette Drive This chapter provides operating and performance □ 40-Megabyte Fixed Disk Drive specifications for the following components of and options for the COMPAQ DESKPRO 386 □ 70-Megabyte Fixed Disk Drive Personal Computer: □ 130-Megabyte Fixed Disk Drive □ System Unit...
Page 28: Compaq Deskpro 386 Personal Computer System Unit
Chapter 1, Operating and Performance Specifications 1.2 COMPAQ DESKPRO 386 PERSONAL COMPUTER SYSTEM UNIT Dimensions: Height: 6.35 in. (16.2 cm) Depth: 16.50 in. (41.9 cm) Width: 19.80 in. (50.3 cm) Weight: Model 40: 42.0 lb (19.1 kg) Model 70: 44.1 lb (20.0 kg) Model 130: 44.1 lb (20.0 kg)
Page 29: Compaq Enhanced Keyboard
Maintenance and Service Guide 1.3 COMPAQ ENHANCED 1.4 84-KEY KEYBOARD KEYBOARD Dimensions: Height: 1.40 in. ( 3.8 cm) Dimensions: Depth: 7.06 in. (17.8 cm) Height: 8.30 in. (21.1 cm) Width: 18.25 in. (46.3 cm) Depth: 1.50 in. ( 3.8 cm) Weight: 3.5 lb (1.6 kg)
Page 30: Compaq Dual-Mode Monitor
Chapter 1, Operating and Performance Specifications 1.5 COMPAQ DUAL-MODE MONITOR Dimensions: Height: 10.25 in. (26.0 cm) Depth: 13.75 in. (34.9 cm) Width: 14.75 in. (37.5 cm) Weight: 18.2 lb (8.3 kg) Display: □ Integral implosion protection □ 12-inch (30.48 cm) screen (diagonal) □...
Page 31: Compaq Color Monitor
Maintenance and Service Guide 1.6 COMPAQ COLOR MONITOR Dimensions: Height: 11.8 in. (30.0 cm) Depth: 15.0 in. (38.1 cm) Width: 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) □...
Page 32: Compaq Video Graphics Color Monitor
Chapter 1, Operating and Performance Specifications 1.7 COMPAQ VIDEO GRAPHICS COLOR MONITOR Dimensions: Height: 14.1 in. (35.7 cm) Depth: 14.6 in. (37.0 cm) Width: 13.8 in. (35.0 cm) Weight: 42.0 lb (19.1 kg) Display: □ 640 pixel × 480 line VGA-compatible graphics resolution □...
Page 33 Maintenance and Service Guide Power Requirements: Volts: North American: 115 VAC, 60 Hz International: 220 to 240 VAC, 50 Hz Amperes: North American: International: Wattage: 125 watts Environmental Requirements: Temperature: Operating: 50˚F to 104˚F (10˚C to 40˚C) Nonoperating: 32˚F to 140˚F (0˚C to 60˚C) Humidity: Operating: 10% to 90% (noncondensing)
Page 34: Compaq Video Graphics Monochrome Monitor
Chapter 1, Operating and Performance Specifications 1.8 COMPAQ VIDEO GRAPHICS MONOCHROME MONITOR Dimensions: Height: 10.2 in. (26.0 cm) Depth: 12.6 in. (32.1 cm) Width: 11.7 in. (29.8 cm) Weight: 13.0 lb (5.9 kg) Display: □ 640 pixel × 480 line VGA-compatible graphics resolution □...
Page 35 Maintenance and Service Guide Power Cable: Length, attached: North American: 72 in. International: 30.48 cm. Length, detachable: North American: International: 1.8 m Cable connector: North American: NEMA 5-15P (parallel blade plug) International: Shrouded IEC 320/CEE 22 configuration Appliance coupler/cable: North American: International: IEC 320/CEE 22 Power Requirements:...
Page 36: 360-Kbyte 5¼-Inch Diskette Drive
1-10 Chapter 1, Operating and Performance Specifications 1.9 360-KBYTE 5¼-INCH DISKETTE DRIVE Dimensions: Height: 1.62 in. ( 4.1 cm) Depth: 8.25 in. (21.0 cm) Width: 5.75 in. (14.6 cm) (allow 0.375 in. (0.94 cm) for installing rails) Weight: 3.2 lb (1.4 kg) Data Transfer Rate: 250 Kbits per second Media:...
Page 37: Megabyte 5¼-Inch Diskette Drive
Maintenance and Service Guide 1-11 1.10 1.2-MEGABYTE 5¼-INCH DISKETTE DRIVE Dimensions: Height: 1.62 in. ( 4.1 cm) Depth: 8.25 in. (21.0 cm) Width: 5.75 in. (14.6 cm) (allow 0.375 in. (0.94 cm) for installing rails) Weight: 3.2 lb (1.4 kg) Data Transfer Rate: 300/500 Kbits per second Media:...
Page 38: Megabyte 3½-Inch Diskette Drive
1-12 Chapter 1, Operating and Performance Specifications 1.11 1.44-MEGABYTE 3½-INCH DISKETTE DRIVE Dimensions: Height: 1.62 in. (4.1 cm) Depth: 8.25 in. (21 cm) Width: 6.12 in. (15.5 cm) Weight: 1.75 lb (0.79 kg) Data Transfer Rate: 250/500 Media: 3½-inch 1.44-megabyte double-sided diskette Dual-density (720-Kbyte mode) High-density (1.44-megabyte mode) Tracks per inch:...
Page 39: 40-Megabyte Fixed Disk Drive
Maintenance and Service Guide 1-13 1.12 40-MEGABYTE FIXED DISK DRIVE Dimensions: Height: 1.6 in. ( 4.1 cm) Depth: 8.8 in. (22.4 cm) Width: 5.8 in. (14.6 cm) (allow 0.375 in. (0.94 cm) for installing rails) Weight: 4.2 lb (1.9 kg) Drive Type: (used in SETUP program) Number of Data Heads:...
Page 40: 70-Megabyte Fixed Disk Drive
1-14 Chapter 1, Operating and Performance Specifications 1.13 70-MEGABYTE FIXED DISK DRIVE Dimensions: Height: 3.38 in. ( 8.6 cm) Depth: 8.00 in. (20.3 cm) Width: 5.87 in. (14.9 cm) (allow 0.375 in. (0.94 cm) for installing rails) Weight: 7.5 lb (3.4 kg) Drive Type: (used in SETUP program) Number of Data Heads:...
Page 41: 130-Megabyte Fixed Disk Drive
Maintenance and Service Guide 1-15 1.14 130-MEGABYTE FIXED DISK DRIVE Dimensions: Height: 3.38 in. ( 8.6 cm) Depth: 8.00 in. (20.3 cm) Width: 5.87 in. (14.9 cm) (allow 0.375 in. (0.95 cm) for installing rails) Weight: 7.5 lb (3.4 kg) Drive Type: (used in SETUP program) or 35...
Page 42: 40-Megabyte Fixed Disk Drive Backup (Tape)
1-16 Chapter 1, Operating and Performance Specifications 1.15 40-MEGABYTE FIXED DISK DRIVE BACKUP Dimensions: Height: 1.62 in. ( 4.1 cm) Depth: 8.00 in. (20.3 cm) Width: 5.75 in. (14.6 cm) (allow 0.375 in. (0.95 cm) for installing rails) Weight: 1.7 lb (0.77 kg) Media: DC 2000 streaming cartridge (manufactured by the 3M Corporation) or equivalent...
Page 43: 135-Megabyte Fixed Disk Drive Backup (Tape)
Maintenance and Service Guide 1-17 1.16 135-MEGABYTE FIXED DISK DRIVE BACKUP (TAPE) Dimensions: 1.62 in. ( 4.1 cm) Height: 8.50 in. (21.6 cm) Depth: 5.75 in. (14.6 cm) Width: (allow 0.375 in (0.95 cm) for installing rails) Weight: 2.4 lb (1.1 kg) Media: DC 600XTD streaming cartridge (manufactured by the 3M Corporation) or equivalent...
Page 44: 600-Megabyte Fixed Disk Drive Expansion Unit
1-18 Chapter 1, Operating and Performance Specifications 1.17 300-/600-MEGABYTE FIXED DISK DRIVE EXPANSION UNIT Dimensions: Height: 6.4 in. (16.1 cm) Depth: 16.5 in. (41.9 cm) Width: 14.5 in. (35.9 cm) Weight: One Drive, 300-Megabyte unit: 27.5 lb (12.4 kg) Two Drives, 300-Megabyte units, mirrored: 35.5 lb (15.9 kg) Environmental Requirements: Temperature...
Page 45: 300-Megabyte Fixed Disk Drive For The Expansion Unit
Maintenance and Service Guide 1-19 1.18 300-MEGABYTE FIXED DISK DRIVE FOR THE EXPANSION UNIT Dimensions: Height: 3.25 in. ( 8.3 cm) Depth: 8.00 in. (20.3 cm) Width: 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)
Page 47 CONTENTS Chapter 2 POWER-ON SELF-TEST (POST)/PROBLEM ISOLATION 2.1 INTRODUCTION 2.2 POWER-ON SELF-TEST (POST) 2.3 PRELIMINARY STEPS TO PROBLEM ISOLATION 2.4 PROBLEM ISOLATION FLOWCHART...
Page 49: Power-On Self-Test (Post)/Problem Isolation
(numbers) are visible on the monitor. See A series of diagnostics tests automatically runs Chapter 5, ERROR MESSAGES AND CODES, on every COMPAQ personal computer system for definitions of the error codes. when you turn on the system. These tests are...
Page 50: Preliminary Steps To Problem Isolation
Chapter 2, Power-On Self-Test (Post)/Problem Isolation 2.3 PRELIMINARY STEPS TO 2.4 PROBLEM ISOLATION PROBLEM ISOLATION FLOWCHART If you encounter an error condition, complete The problem isolation flowchart provides a quick the following steps before starting the problem reference for identifying and correcting possible isolation procedures.
Page 51 Maintenance and Service Guide Did the Complete To B cursor appear Turn AC power Preliminary Page on the switch ON. Steps. monitor? To A Page...
Page 52 Chapter 2, Power-On Self-Test (Post)/Problem Isolation Is the Did the To B brightness cursor appear Page knob turned on the monitor? To C Adjust Page brightness knob and restart.
Page 53 Maintenance and Service Guide Did an See Chapter 5 error code ERROR appear on the MESSAGES monitor? AND CODES. Proceed with diagnostics. Did you hear POST has See Chapter 4 1 or 2 completed ADVANCED short beeps? successfully. DIAGNOSTICS PROGRAM. To D Page...
Page 54 Chapter 2, Power-On Self-Test (Post)/Problem Isolation Is the To E system LED Page lit? If replacing the power Replace the Is the supply, did power supply AC power not the system assembly and fuse good? LED light? restart. Proceed to F Page 2-8.
Page 55 Maintenance and Service Guide Did you See Chapter 5 hear other ERROR audible error MESSAGES codes (beeps)? AND CODES Check the If beeps are Is the speaker Replace the speaker still not heard, assembly speaker assembly proceed to connected? and restart. connection.
Page 56 Chapter 2, Power-On Self-Test (Post)/Problem Isolation 1. Verify that all signal cables are 1. Verify that all signal cables are connected. connected. 2. Replace the following devices in order. 2. Replace the following devices 3. Restart after each replacement and in order.
Page 57: When To Run Setup
CONTENTS Chapter 3 SETUP PROGRAM 3.1 WHEN TO RUN SETUP 3.2 HOW TO RUN SETUP Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 59: Setup Program
Chapter 3 Maintenance and Service Guide SETUP PROGRAM The COMPAQ personal computer uses a memory □ When certain options are added to the device that stores the current date, time, and system including: system configuration. The SETUP program, in- Coprocessor...
Page 60: How To Run Setup
Chapter 3, Setup Program 3.2 HOW TO RUN SETUP 4. Follow the instructions on the screen as the program sets the system configuration. To run SETUP, follow these instructions: NOTE: The F1 function key can be 1. Insert either ADVANCED DIAGNOSTICS or used anytime during SETUP to USER DIAGNOSTICS diskette into drive A.
Page 61: Test Selection Menu
CONTENTS Chapter 4 ADVANCED DIAGNOSTICS PROGRAM 4.1 PRELIMINARY STEPS 4.2 MAIN MENU Run the Diagnostic Tests Format a Diskette Run the SETUP Program Clear Configuration and Run the SETUP Program Display ROM Versions 4.3 ADVANCED DIAGNOSTICS PROGRAM System Test Menu Test Logging Utilities Menu 4.4 TEST SELECTION MENU Processor...
Page 62 4.4 TEST SELECTION MENU Continued Video Video Controller Display Characteristics Character Set 80 x 25 Display 40 x 25 Display 320 x 200 Standard Graphics 4-10 640 x 200 Standard Graphics 4-10 Lightpen 4-11 Display Memory Pages 4-11 Gray Scale/Color 4-12 Noise 4-12...
Page 63 4.4 TEST SELECTION MENU Continued Diskette Drive 4-17 Write/Read/Compare 4-17 Random Seek 4-17 Verify Diskette 4-17 Diskette Speed 4-17 Diskette Change Line 4-18 Format a Diskette (for diagnostic use only) 4-18 Monochrome Video Board 4-18 Asynchronous Communications Interface 4-18 Modem 4-19 Modem Internal Loopback 4-19...
Page 64 4.4 TEST SELECTION MENU Continued Fixed Disk Drive Format Menu 4-21 Conditional Format 4-22 Unconditional Format 4-22 Surface Analysis 4-23 Change Interleave 4-23 Display Current Interleave 4-23 Fixed Disk Drive Backup (Tape) 4-24 Format Fixed Disk Drive Backup Cartridge (for diagnostic use only) 4-24 Fixed Disk Drive Backup 4-25...
Page 65: Advanced Diagnostics Program
ADVANCED DIAGNOSTICS PROGRAM 4.1 PRELIMINARY STEPS This chapter describes the ADVANCED DIAGNOSTICS program for the COMPAQ Before running the ADVANCED DIAGNOSTICS personal computer being tested. The screens and program, complete the following steps: information displayed are specific to the system being tested.
Page 66: Main Menu
Chapter 4, Advanced Diagnostics Program 4.2 MAIN MENU 6. Turn on the computer and monitor. Once POST completes successfully, the The main menu allows you to select one of the screen displays a list of the devices in- following: stalled. □ Run the diagnostic tests NOTE: The F1 function key can be used □ Format a diskette (for diagnostic use only)
Page 67: Format A Diskette
Maintenance and Service Guide Format a Diskette Clear Configuration and Run the SETUP Program The ADVANCED DIAGNOSTICS program requires that a diskette be formatted for each This selection clears the system configuration diskette drive being tested. This utility is not memory before invoking the SETUP program.
Page 68: Advanced Diagnostics Program
Chapter 4, Advanced Diagnostics Program 4.3 ADVANCED DIAGNOSTICS Test Logging Utilities Menu PROGRAM This selection allows you to: □ Log detected errors to a printer. When this feature is turned ON, all error messages are System Test Menu written to the printer. □ Display the test log.
Page 69: Test Selection Menu
Maintenance and Service Guide 4.4 TEST SELECTION MENU □ Modem Communications □ Fixed Disk Drive The Test Selection Menu selections vary □ Fixed Disk Drive Backup (Tape) according to the configuration of the computer being tested. You can elect to run one test, a □ Enhanced Color Graphics or Video Graphics combination of tests, or all of the tests.
Page 70: Memory
Chapter 4, Advanced Diagnostics Program Memory NOTE: Before selecting this test, be sure you know which device is set to LPT1 or The Memory test verifies memory data patterns, LPT2. This is necessary to determine memory addressing, and parity detection for all the applicability of any messages or system memory.
Page 71 Maintenance and Service Guide Table 4-1. Matrix of Possible Video Tests Video Controller/Display Video Test W/DMM W/COLOR W/COLOR W/MONO Video Controller Display Characteristics Character Set 80 x 25 Display 40 x 25 Display 320 x 200 Standard Graphics 640 x 200 Standard Graphics Lightpen Display Memory Pages Gray Scale/Color...
Page 72: Display Characteristics
Chapter 4, Advanced Diagnostics Program The following paragraphs describe the tests for 80 x 25 Display the various video configurations. The 80 x 25 Display selection verifies that the system can operate in both the high-resolution Video Controller and low-resolution modes. The Video Controller selection verifies the The screen for the 80 x 25 high-resolution text integrity of the video display controller, the...
Page 73: 40 X 25 Display
Maintenance and Service Guide The screen for the 80 x 25 low-resolution charac- 40 x 25 Display ter display mode (8 x 8 character matrix) appears The 40 x 25 Display selection verifies that the similar to Screen 2. system can operate in the 40 x 25 low-resolution character display mode 8 x 8 character matrix).
Page 74: 320 X 200 Standard Graphics
4-10 Chapter 4, Advanced Diagnostics Program 320 x 200 Standard Graphics 640 x 200 Standard Graphics The 320 x 200 Standard Graphics selection The 640 x 200 Standard Graphics selection verifies that the system can operate in the verifies that the system can operate in the 320 x 200 color graphics mode with color sets 640 x 200 monochrome graphics mode.
Page 75: Lightpen
Maintenance and Service Guide 4-11 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 pages (0 through 7) of the memory on the video display controller.
Page 76: Gray Scale/Color
4-12 Chapter 4, Advanced Diagnostics Program 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 Screen 7 appears on the monitor.
Page 77: Enhanced Display Characteristics
Maintenance and Service Guide 4-13 Enhanced Display Characteristics 640 x 200 Color Graphics The Enhanced Display Characteristics selection The 640 x 200 Color Graphics selection verifies verifies the ability of the video display controller that the system can operate in the 640 x 200 and monitor to display certain attributes: normal color graphics mode, displaying 16 different and high intensities;...
Page 78: 640 X 350 Color Graphics
4-14 Chapter 4, Advanced Diagnostics Program 640 x 350 Color Graphics Displays of all 64 possible colors appear similar to Screen 11. The 640 x 350 Color Graphics selection verifies that the system can operate in the 640 x 350 color graphics mode by displaying the first 16 of 64 possible colors, then all 64 possible colors.
Page 79: Monochrome Text
Maintenance and Service Guide 4-15 Monochrome Text 640 x 350 Monochrome Graphics The Monochrome Text selection verifies that The 640 x 350 Monochrome Graphics selection the system can operate in the monochrome text verifies that the system can operate in the mode.
Page 80: 640 X 480 Graphics
4-16 Chapter 4, Advanced Diagnostics Program 640 x 480 Graphics 256 Color Mode The 640 x 480 Graphics selection verifies that The 256 Color Mode selection verifies the differ- the system can operate in the 640 x 480 graphics ent shading of nine colors. A display similar to mode.
Page 81: Monitor Alignment
Maintenance and Service Guide 4-17 Monitor Alignment The following paragraphs describe these selec- tions. The Monitor Alignment selection allows you to check the alignment and intensity of the video Write/Read/Compare display unit. The Write/Read/Compare selection verifies that the diskette drive subsystem writes, reads, and Diskette Drive compares data patterns, that the diskette drive controller properly resets, and that the diskette...
Page 82 4-18 Chapter 4, Advanced Diagnostics Program Monochrome Video Board Diskette Change Line The Diskette Change Line selection verifies For a description of this test, see “Video Tests” that the diskette drive change-line circuitry is described previously. functioning properly. You may be instructed to remove and reinsert the blank diskette that has been formatted for diagnostics.
Page 83 Maintenance and Service Guide 4-19 Modem Auto Originate Mode The Auto Originate Mode selection verifies The Modem test runs a series of other tests that that the modem subassembly can dial a remote verify the modem and interface cables. modem, establish the transmission line carrier, The following selections are available: check the transmission line quality, perform data □ Modem Internal Loopback...
Page 84: Fixed Disk Drive
4-20 Chapter 4, Advanced Diagnostics Program Modem Direct Connect □ Error Detection and Correction The Modem Direct Connect selection verifies the □ Run All the Above Tests TIP/RING (two wire) loopback circuitry as well □ Read Verify as the data transfer and bit error rate circuitry □ Format Menu (as does the Modem Internal Loopback selec- tion, above).
Page 85: Conditional Format
Maintenance and Service Guide 4-21 Head Select Format Menu The Head Select selection verifies that each head The Format Menu selection provides two format of the fixed disk drive can be accessed and is program options and two formatting features for functional.
Page 86 4-22 Chapter 4, Advanced Diagnostics Program NOTE: The computer must be turned on for at least 20 minutes before formatting the IMPORTANT fixed disk drive. Because several of these selections destroy Also, it is very important that this test all information on the fixed disk drive, you be allowed to run to completion once may need to reinitialize the fixed disk drive.
Page 87 Maintenance and Service Guide 4-23 NOTE: An Unconditional Format should be Change Interleave performed only if you are sure that The Change Interleave selection permits you tracks marked bad on the fixed disk drive to change the interleave factor of the fixed disk are not actually bad.
Page 88: Fixed Disk Drive Backup (Tape)
4-24 Chapter 4, Advanced Diagnostics Program Fixed Disk Drive Backup (Tape) Format Fixed Disk Drive Backup Cartridge (for diagnostic use only) The Fixed Disk Drive Backup (Tape) test verifies This selection formats a fixed disk drive backup the tape backup, the fixed disk drive control- tape cartridge for use during diagnostic testing.
Page 89: Fixed Disk Drive Backup
Maintenance and Service Guide 4-25 Enhanced Color Graphics Fixed Disk Drive Backup The Fixed Disk Drive Backup selection verifies For a description of this test, see “Video Tests” that the system can identify the following on described previously. selected tracks of the tape cartridge: drive type; cartridge in place;...
Page 91: Error Messages And Codes
CONTENTS Chapter 5 ERROR MESSAGES AND CODES 5.1 INTRODUCTION 5.2 POWER-ON SELF-TEST ERROR MESSAGES 5.3 ADVANCED DIAGNOSTICS ERROR CODES 5.4 MEMORY ERROR CODES 5-31 5.5 EXTDISK MESSAGES 5-36...
Page 93 Maintenance and Service Guide [ page missing ] Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 94 Chapter 5, Error Messages and Codes [ page missing ] Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 95 Maintenance and Service Guide Table 5-1. Power-On Self-Test Error Messages Continued Message Beeps Probable Cause Recommended Action 402–Monochrome , 2S Monochrome display Replace the monochrome display con- Adapter Failure controller board troller board. 501–Display Adapter , 2S Video display controller Replace the video board.
Page 96: Advanced Diagnostics Error Codes
For example, error code 610-01 shows that the system recognizes a problem while running the diskette drive change line test exceeded the the COMPAQ ADVANCED DIAGNOSTICS Pro- maximum soft error limit. gram. These error codes help identify possible defective subassemblies.
Page 97 Maintenance and Service Guide [ page missing ] Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 98 Chapter 5, Error Messages and Codes [ page missing ] Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 99 Maintenance and Service Guide Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description 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 Port 61 bit 1 not at one. 105-09 Port 61 bit 0 not at one.
Page 100 Chapter 5, Error Messages and Codes Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description Action 111-01 Refresh detect test failed. Replace the system board and retest for error codes 103-xx through 113-xx. 112-01 Speed test slow mode out of range. 112-02 Speed test mixed mode out of range.
Page 101 Maintenance and Service Guide Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description Action Memory Test 201-01 Memory machine ID test tailed. The following steps apply to error codes 201-xx through 202-xx: 202-01 Memory system ROM checksum failed. 1.
Page 102 5-10 Chapter 5, Error Messages and Codes Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description Action Memory Test 210-xx Incrementing pattern test. Replace the memory board and retest for 210 and 211 error codes. 210-01 Data read from block did not match data written.
Page 103 5-11 Maintenance and Service Guide Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description Action 303-01 Keyboard LED test, 8042 self The following steps apply to error codes 301-xx test failed. through 304-xx: 303-02 Keyboard LED test, reset test failed. 1.
Page 104 5-12 Chapter 5, Error Messages and Codes Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description Action Security Lock Test 315-01 Security lock inoperative. The following steps apply to error codes 315-xx: 315-02 Security lock stuck in locked position. 1.
Page 105 5-13 Maintenance and Service Guide Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description Action 402-13 Printer interrupt, loopback and data The following steps apply to error codes 401-xx register failed. through 498-xx: 402-14 Printer interrupt, loopback and control 1.
Page 106 5-14 Chapter 5, Error Messages and Codes Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description Action 508-01 Video 320 × 200 mode color set 0 test The following steps apply to error codes 501-xx failed. through 516-xx: 509-01 Video 320 ×...
Page 107 5-15 Maintenance and Service Guide Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description Action Diskette Drive Test 600-xx Diskette ID drive types test failed. The following steps apply to error codes 600-xx through 610-xx: 601-xx Diskette format failed. 1.
Page 108 5-16 Chapter 5, Error Messages and Codes Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description Action The following steps apply to error codes 697-xx through 699-xx: Previously exceeded maximum hard error limit. 1. Replace the diskette and retest. 2.
Page 109 5-17 Maintenance and Service Guide Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description Action Serial Test 1101-01 Serial Port Test, UART DLAB bit failure. The following steps apply to error codes 1101-xx through 1109-xx. 1101-02 Serial Port Test, line input or UART fault. 1.
Page 110 5-18 Chapter 5, Error Messages and Codes Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description Action 1101-14 Serial Port Test, DRIVER/RECEIVER The following steps apply to error codes 1101-xx data failure. through 1109-xx. 1109-01 Clock register initialization failure. 1.
Page 111 5-19 Maintenance and Service Guide Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description Action UART control signal interrupt failure. The following steps apply to error codes 1201-xx through 1210-xx: DRIVER/RECEIVER data failure. 1. Refer to the modem documentation for correct setup Modem detection failure.
Page 112 5-20 Chapter 5, Error Messages and Codes Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description Action 1203-xx Modem External Termination Test. The following steps apply to error codes 1201-xx through 1210-xx: Modem external TIP/RING failure. 1. Refer to the modem documentation for correct setup Modem external DATA procedures.
Page 113 5-21 Maintenance and Service Guide Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description Action 1206-xx Dial Multifrequency Tone Test. The following steps apply to error codes 1201-xx through 1210-xx: Tone detection failure. 1. Refer to the modem documentation for correct setup 1210-xx Modem Direct Connect Test.
Page 114 5-22 Chapter 5, Error Messages and Codes Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description Action Fixed Disk Drive Test 1700-xx Fixed disk ID drive types test failed. The following steps apply to error codes 1700-xx through 1799-xx: 1701-xx Fixed disk format test failed.
Page 115 5-23 Maintenance and Service Guide Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description Action 1799-xx Invalid fixed disk drive type failed. The following steps apply to error codes 1700-xx through 1799-xx: 1. Run SETUP. Exceeded maximum soft error limit. 2.
Page 116 5-24 Chapter 5, Error Messages and Codes Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description Action The following steps apply to error codes 1700-xx through 1799-xx: Failed to get drive parameters from ROM. 1. Run SETUP. 2. Check the switch settings and jumper positions on the Invalid drive parameters found controller board and retest (see Chapter 8).
Page 117 5-25 Maintenance and Service Guide Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description Action The following steps apply to error codes 1700-xx through 1799-xx: Failed uncorrectable ECC* error. 1. Run SETUP. Failed correctable ECC* error. 2. Check the switch settings and jumper positions on the Failed soft error rate.
Page 118 5-26 Chapter 5, Error Messages and Codes Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description Action Fixed Disk Drive Backup (Tape) Test 1900-xx Tape ID failed. The following steps apply to error codes 1900-xx through 1907-xx: 1901-xx Tape servo write failed 1.
Page 119 5-27 Maintenance and Service Guide Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description Action The following steps apply to error codes 1900-xx through 1907-xx: Tape not servo written. 1. Replace the tape cartridge and retest. Tape not formatted. 2.
Page 120 5-28 Chapter 5, Error Messages and Codes Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description Action The following steps apply to error codes 1900-xx through 1907-xx: Illegal command. 1. Replace the tape cartridge and retest. No data detected. 2.
Page 121 5-29 Maintenance and Service Guide Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description Action 2409-01 Video 320 × 200 mode color set 1 The following steps apply to error codes 2402-xx through test failed. 2416-xx: 2410-01 Video 640 × 200 mode test failed. 1.
Page 122 5-30 Chapter 5, Error Messages and Codes Table 5-2. Advanced Diagnostics Error Codes Continued Error Recommended Code Description Action 2418-01 EGC/VCG memory test failed. The following steps apply to error codes 2418-xx through 2432-xx: 2418-02 EGC/VCG shadow RAM test failed. 1.
Page 123: Memory Error Codes
640 Kbytes are the base memory. The next Self-Test (201 or 203 error codes) or as a result 256 Kbytes are used by the COMPAQ Expanded of a diagnostic test (203 error codes). The TEST Memory Management (CEMM) Program. The programs attempt to isolate the memory fault to last 128 Kbytes are reserved for system use.
Page 124 5-32 Chapter 5, Error Messages and Codes 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 08 = data bit 3...
Page 125: Memory Error Locations On The 32-Bit System Memory Board
5-33 Maintenance and Service Guide Figure 5-1. Memory Error Locations on the 32-Bit System Memory Board. Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 126: Memory Error Locations On The 1- To 2-Megabyte 32-Bit Memory Board
5-34 Chapter 5, Error Messages and Codes Figure 5-2. Memory Error Locations on the 1- to 2-Megabyte 32-Bit Memory Board. Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 127: Memory Error Locations On The 4- To 8-Megabyte 32-Bit Memory Board
5-35 Maintenance and Service Guide Figure 5-3. Memory Error Locations on the 4- to 8-Megabyte 32-Bit Memory Board. Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 128: Extdisk Messages
5-36 Chapter 5, Error Messages and Codes 5.5 EXTDISK MESSAGES NOTE: For more information on installation and use of the 300-/600-Megabyte Fixed Disk The following list of messages may be issued Drive Expansion Unit, see Chapter 9, while installing the EXTDISK utility. The MASS STORAGE CONFIGURATIONS.
Page 129 5-37 Maintenance and Service Guide Table 5-5. EXTDISK Messages Message Probable Cause Recommended Action Error Accessing Disk x, The EXTDISK.SYS device driver 1. Reseat boards. Secondary Controller cannot access a fixed disk drive on 2. Check cables and switch settings. the secondary controller board.
Page 131: Spare Parts List, U.s
CONTENTS Chapter 6 ILLUSTRATED PARTS CATALOG 6.1 INTRODUCTION 6.2 SPARE PARTS LIST, U.S. 6.3 SPARE PARTS LIST, INTERNATIONAL 6.4 PARTS LIST 6-10 6.5 300-/600-MEGABYTE FIXED DISK DRIVE EXPANSION UNIT PARTS LIST 6-21 Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 133: Illustrated Parts Catalog
Each section contains a parts list which consists of: This chapter provides a reference for spare parts □ Description - The name of the particular for the COMPAQ DESKPRO 386 Personal part or parts kit Computer. □ Part Number - The number to use when...
Page 134: Spare Parts List, U.s
108060-001 15. System Board with 80387 Coprocessor Socket, Version 2 108407-001 16. Video Display Controller Board 101340-001 17. COMPAQ Enhanced Color Graphics Board, Version 1 106373-001 18. COMPAQ Enhanced Color Graphics Board, Version 2 109196-001 Continued... Addendum 108431-001 (11-88) to...
Page 135 Maintenance and Service Guide Table 6-1. Spare Parts List, U.S. Continued Description Part Number 19. Video Display Controller Board 101340-001 20. COMPAQ Video Color Graphics Board 109253-001 21. ESDI Fixed Disk Drive Controller Boards (130-Megabyte) 1:1 Interleave 113245-001 3:1 Interleave 108140-001 22.
Page 136 Chapter 6, Illustrated Parts Catalog Table 6-1. Spare Parts List, U.S. Continued Description Part Number 39. 360-Kbyte 5¼-Inch Diskette Drive 102928-001 40. 130-Megabyte Fixed Disk Drive 108080-001 41. 70-Megabyte Fixed Disk Drive 102932-001 42. 40-Megabyte Fixed Disk Drive 108058-001 43. 135-Megabyte Fixed Disk Drive Backup (Tape) 113218-001 44.
Page 137 75. BASIC VERSION 3.3 REFERENCE GUIDE 106983-001 76. BASIC VERSION 3.2 REFERENCE GUIDE 106653-001 77. BASIC VERSION 3.1 REFERENCE GUIDE 105345-001 78. COMPAQ DESKPRO 386 OPERATIONS GUIDE 108291-003 * Contained in the Miscellaneous Hardware Kit (102709-001) Continued... Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 138 Description Part Number 79. COMPAQ DESKPRO 386 MAINTENANCE AND SERVICE GUIDE 108139-001 (with ADVANCED DIAGNOSTICS) 80. COMPAQ DESKPRO 366 MAINTENANCE AND SERVICE GUIDE (with Test Cable) 105264-001 81. COMPAQ DESKPRO 386 TECHNICAL REFERENCE GUIDE 108400-001 82. SUPPLEMENTAL SOFTWARE GUIDE 108416-002 83.
Page 139 Maintenance and Service Guide Table 6-1. Spare Parts List, U.S. Continued Description Part Number Miscellaneous Spare Parts 98. Logo Set 108141-001 99. Exchange Tag Form 105460-001 100. Upper Blank Drive Panel 101135-001 101. Lower Blank Drive Panel 101135-002 102. Keyboard Feet (rubber) 103.
Page 140 Chapter 6, Illustrated Parts Catalog Table 6-1. Spare Parts List, U.S. Continued Description Part Number 109. Miscellaneous Hardware Kit 102709-001 PCB Retainer (Qty 4) PCB Standoff (Qty 3) Brightness Knob (Qty 5) Push Button Mount Fastener (Qty 5) Ty-wrap (Qty 100) PCB Card Guide (Qty 5) Keyboard Feet, Rubber (Qty 10) Monitor Feet, Cork (Qty 5)
Page 141: Spare Parts List, International
1. Power Supply 108524-001 2. Fixed Disk Drive (40-Megabyte Gray) 120332-001 3. Fixed Disk Drive (70-Megabyte Gray) 120369-001 4. Fixed Disk Drive (130-Megabyte ESDI Gray) 120333-001 5. COMPAQ Enhanced Keyboard Assembly U.S. ENGLISH 107673-001 U.K. ENGLISH 107674-001 GERMAN 107675-001 FRENCH...
Page 142: Parts List
6-10 Chapter 6, Illustrated Parts Catalog Table 6-2. Spare Parts List, International* Continued Description Part Number 10. 135-Megabyte Fixed Disk Drive Backup (Tape) 113227-001 11. Monitor Assembly, Dual-Mode, Green 105329-001 12. Monitor Assembly, Dual-Mode, Amber 105329-002 13. Video Graphics Color Monitor, Northern Hemisphere 109337-001 14.
Page 143 6-11 Maintenance and Service Guide Figure 6-1. System Unit (Exterior and Battery). Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 144: System Unit
6-12 Chapter 6, Illustrated Parts Catalog Table 6-3. System Unit Continued Description Part Number 6. Speaker/Board Guide Assembly Enclosure 101062-001 7. Speaker Assembly 101062-001 8. Security Lock Contact Switch 102767-001 9. Drive Housing Assembly 108266-001 10. Fuse Kit (40 ea.) 102930-001 11.
Page 145 6-13 Maintenance and Service Guide Figure 6-2. System Unit (Interior with Memory Options). Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 146: System Unit
32. 135-Megabyte Fixed Disk Drive Backup Cable 113198-001 33. Asynchronous Communications/Parallel Printer Board 106886-001 34. 2400-Baud Internal Modem 112693-001 35. COMPAQ Video Display Controller Board 101340-001 36. COMPAQ Video Graphics Controller Board 109253-001 37. Tape Controller Board (135-Megabyte) 113259-001 38. Blank I/O Access Plate 101144-001 39.
Page 147 6-15 Maintenance and Service Guide Figure 6-3. System Unit (Interior with Controller Boards and Mass Storage Options). Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 148 6-16 Chapter 6, Illustrated Parts Catalog Table 6-4. COMPAQ Enhanced Keyboard Description Part Number 1. Keyboard Assembly (with cable) 108067-001 2. Keyboard Cable 108095-001 3. Keyboard Feet (rubber) *Contained in Miscellaneous Hardware Kit (part no. 102709-001) Figure 6-4. COMPAQ Enhanced Keyboard.
Page 149 6-17 Maintenance and Service Guide [ page missing ] Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 150 6-18 Chapter 6, Illustrated Parts Catalog [ page missing ] Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 151 6-19 Maintenance and Service Guide Table 6-4. COMPAQ Video Graphics Color Monitor Description Part Number Monitor Assembly 109255-001 Figure 6-7. COMPAQ Video Graphics Color Monitor. Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 152 6-20 Chapter 6, Illustrated Parts Catalog Table 6-4. COMPAQ Video Graphics Monochrome Monitor Description Part Number Monitor Assembly 109254-001 Figure 6-8. COMPAQ Video Graphics Monochrome Monitor. Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 153: 600-Megabyte Fixed Disk Expansion Unit Parts List
Use only PARTS LIST 115812-001 signal cables in the 300-/600-Megabyte Fixed Disk Drive The Parts Kit contains the recommended parts Expansion Unit. available to an Authorized COMPAQ Computer Dealer for the EXPANSION UNIT. Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 154 6-22 Chapter 6, Illustrated Parts Catalog Figure 6-9. 300-/600-Megabyte Fixed Disk Drive Expansion Unit. Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 155 6-23 Maintenance and Service Guide Table 6-9. Parts for Expansion Unit Description Part Number 1. External Fixed Disk Drive Controller 115839-001 2. I/O Cable 115810-001 3. External Interlace Adapter 115838-001 4. Power Supply 108065-001 5. Power Cord 101155-001 6. 300-MB Fixed Disk Drive 113219-001 7.
Page 157 CONTENTS Chapter 7 REMOVAL AND REPLACEMENT PROCEDURES 7.1 INTRODUCTION 7.2 MONITOR 7.3 KEYBOARD 7.4 POWER FUSE 7.5 PREPARING THE SYSTEM UNIT FOR THE INTERNAL REMOVAL AND REPLACEMENT PROCEDURES 7.6 SYSTEM UNIT COVER AND INTERNAL CONFIGURATION 7.7 POWER SUPPLY 7-12 7.8 BATTERY 7-15 7.9 SECURITY LOCK 7-18...
Page 158: Mass Storage Devices
7.14 SPEAKER ASSEMBLY AND SECURITY LOCK SWITCH 7-29 7.15 MASS STORAGE DEVICE(S) 7-33 Removal and Replacement Procedures for Drive Positions A or D 7-34 Removal and Replacement Procedures for Drive Positions B or C 7-36 7.16 SYSTEM BOARD 7-39 7.17 INTEL 387 COPROCESSOR 7-45 7.18 LOST KEY 7-49...
Page 159: Removal And Replacement Procedures
7.1 INTRODUCTION □ Security lock □ Expansion board(s) This chapter contains module-level removal □ 80287 coprocessor and replacement procedures for the COMPAQ DESKPRO 386 Personal Computer. □ Memory expansion board(s) The procedures in this section describe □ Memory chip(s) the following: □ Speaker assembly and security lock switch...
Page 160: Monitor
Chapter 7, Removal and Replacement Procedures 7.2 MONITOR 3. Study Figures 7-1, 7-2, 7-3, and 7-4 to locate the monitor power and signal The following procedures apply to the COMPAQ cables. Dual-Mode, COMPAQ Color, COMPAQ Video Graphics Monochrome, or COMPAQ Video Graphics Color Monitor.
Page 161 Maintenance and Service Guide Figure 7-3. COMPAQ Video Graphics Color Monitor Figure 7-2. COMPAQ Color Monitor (Installed). (Installed).
Page 162 Chapter 7, Removal and Replacement Procedures 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. Figure 7-4. COMPAQ Video Graphics Monochrome Moni- tor (Installed).
Page 163: Keyboard
Maintenance and Service Guide 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 (Figure 7-5).
Page 164: Power Fuse
Chapter 7, Removal and Replacement Procedures 7.4 POWER FUSE New power fuses are available in the fuse kit (part no. 102930-001). The power fuse is inside a fuse holder and casing on the back of the system unit. To remove the power fuse, follow these steps: 1.
Page 165 Maintenance and Service Guide 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 Figure 7-7.
Page 166: Replacement Procedures
Chapter 7, Removal and Replacement Procedures 7.5 PREPARING THE 2. Disconnect any peripheral devices (printers, modems, etc.) from the computer. SYSTEM UNIT FOR THE 3. Disconnect the AC power cord from the AC INTERNAL REMOVAL AND outlet and from the system unit. REPLACEMENT PROCEDURES 4.
Page 167: System Unit Cover And Internal Configuration
Maintenance and Service Guide 7.6 SYSTEM UNIT COVER AND INTERNAL CONFIGURATION WARNING Before removing the cover, be sure that the To remove the system unit cover, follow these ON/OFF switch is in the OFF position and steps: the AC power cord is disconnected. 1.
Page 168: Removing The System Unit Cover
7-10 Chapter 7, Removal and Replacement Procedures 3. Unlock the security lock to free the system unit cover. CAUTION 4. Positioning yourself at the front of the Many of the components on the system board system unit, slide the system unit cover and expansion boards are sensitive to static toward you until you feel it stop.
Page 169: Overhead View Of The Compaq Deskpro 386 Personal
7-11 Maintenance and Service Guide Figure 7-10. Overhead View of the COMPAQ DESKPRO 386 Personal Computer with the System Unit Cover Removed.
Page 170: Power Supply
7-12 Chapter 7, Removal and Replacement Procedures 7.7 POWER SUPPLY The power supply is attached to the system board by a power supply cable and connector. To remove the power supply, follow these steps: 1. Complete the removal procedures in the following sections: a.
Page 171: Removing The Power Supply Screws
7-13 Maintenance and Service Guide 3. Remove the four screws that secure the 4. Slide the power supply assembly toward power supply assembly to the chassis the drive housing assembly until the power (Figure 7-12). supply assembly is released from the tabs holding it to the bottom of the chassis (Figure 7-13).
Page 172: Location Of The Power Supply Connector
7-14 Chapter 7, Removal and Replacement Procedures 5. Shift the power supply slightly away from 6. Disconnect the power supply connector the system board to locate the power supply from the system board, and lift the power connector on the system board (Figure 7-14). supply assembly out of the chassis.
Page 173: Battery
Any time you remove the FOR THE INTERNAL REMOVAL battery, you must rerun the SETUP program. AND REPLACEMENT PROCEDURES d. 7.6 SYSTEM UNIT COVER AND WARNING INTERNAL CONFIGURATION This procedure is to be performed by Autho- rized COMPAQ Computer Dealers only.
Page 174: Location Of The Battery
7-16 Chapter 7, Removal and Replacement Procedures 2. Locate the battery (Figure 7-15). 3. Locate and remove the battery connector from the system board (Figure 7-16). Figure 7-16. Location of the Battery Connector. Figure 7-15. Location of the Battery.
Page 175: Removing The Battery
7-17 Maintenance and Service Guide 4. Remove the battery from the system unit To replace the battery, follow these steps: (Figure 7-17). 1. Reverse Steps 1 through 4 of the preceding 5. To dispose of the battery properly, see removal procedures. Service Bulletin 46.
Page 176: Security Lock
7-18 Chapter 7, Removal and Replacement Procedures 7.9 SECURITY LOCK 3. Remove the screw and clip that secure the security lock assembly to the system unit The security lock secures the security lock as- cover (Figure 7-18). sembly to the system unit cover. You do not have to remove the security lock assembly in these procedures.
Page 177: Expansion Board(S)
7-19 Maintenance and Service Guide 7.10 EXPANSION BOARD(S) 2. Locate and remove the reinforcement bracket by removing the rear screw first The following procedures apply to each board. and then the front screw (Figure 7-19). This sequence prevents the reinforcement To remove an expansion board, follow these bracket from rotating.
Page 178: Location Of The Rf Shield
7-20 Chapter 7, Removal and Replacement Procedures 3. Remove the RF shield (Figure 7-20). 4. Remove the cable cover (Figure 7-21). Figure 7-21. Location of the Cable Cover. Figure 7-20. Location of the RF Shield.
Page 179: Removing The Esdi Fixed Disk Drive
7-21 Maintenance and Service Guide 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 7-23. Removing the Multipurpose Fixed Disk Drive Controller Board Signal Cables.
Page 180: Removing The Fixed Disk Drive
7-22 Chapter 7, Removal and Replacement Procedures 7. Lift the board out of the connector(s) on the system board (Figure 7-25). Figure 7-24. Removing the Fixed Disk Drive Controller Board Signal Cables. Figure 7-25. Removing an Expansion Board. To replace an expansion board, reverse Steps 1 through 7 of the preceding removal procedures.
Page 181: 80287 Coprocessor
7-23 Maintenance and Service Guide 7.11 80287 COPROCESSOR 2. Locate the 80287 coprocessor on the system board, and lift the coprocessor off with your The 80287 coprocessor is installed on the system fingers (Figure 7-26). board under slots 1, 2, and 3. To remove the 80287 coprocessor, follow these steps: 1.
Page 182: Memory Expansion Board(S)
7-24 Chapter 7, Removal and Replacement Procedures 7.12 MEMORY EXPANSION To replace the 80287 coprocessor, follow these steps: BOARD(S) 1. Align the pins on the 80287 coprocessor with the 80287 coprocessor socket. The 1- to 2-megabyte or the 4- to 8-megabyte memory expansion board is secured to the 32-bit 2.
Page 183: Removing The 32-Bit Memory Expansion Board
7-25 Maintenance and Service Guide 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).
Page 184: Memory Chip(S)
7-26 Chapter 7, Removal and Replacement Procedures 7.13 MEMORY CHIP(S) To remove a memory chip, follow these steps: 1. Complete the removal procedures in the Memory chips can be installed on the 32-bit following sections: system memory board, 1- to 2-megabyte 32- 1.
Page 185: Removing The Memory Chip
7-27 Maintenance and Service Guide 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.
Page 186 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. Figure 7-29. Inserting the Memory Chip. 1.
Page 187 7-29 Maintenance and Service Guide 7.14 SPEAKER ASSEMBLY AND 2. Be sure that all the pins are in the socket and that none are bent. SECURITY LOCK SWITCH 3. Press the chip into place. The security lock switch and the speaker assem- 4.
Page 188: Location Of The Speaker/Board Guide Assembly
7-30 Chapter 7, Removal and Replacement Procedures 2. Locate the speaker/board guide assembly 3. Remove the speaker/board guide assembly (Figure 7-30). by pushing the plastic catch on the front of the chassis and swinging the assembly away from the chassis (Figure 7-31). Figure 7-30.
Page 189: Lock Switch
7-31 Maintenance and Service Guide 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: Removing The Speaker Assembly
7-32 Chapter 7, Removal and Replacement Procedures 5. Carefully remove the speaker assembly 6. Carefully remove the security lock switch from the speaker/board guide assembly from the speaker/board guide assembly (Figure 7-33). (Figure 7-34). Figure 7-33. Removing the Speaker Assembly. Figure 7-34.
Page 191: Mass Storage Device(S)
Procedures for removing and replacing mass storage devices vary with the drive position. Table 7-1 shows the possible configurations. Figure 7-35. Location Designators for COMPAQ DESKPRO 386 Mass Storage Devices. Table 7-1. Configurations of Mass Storage Devices Drive Positions...
Page 192: Location Of The Cables For Mass Storage Devices
7-34 Chapter 7, Removal and Replacement Procedures Removal and Replacement 2. Locate and disconnect the signal cable and the power cable from the back of the mass Procedures for Drive Positions A or D storage device (Figure 7-36). To remove a mass storage device from drive posi- tions A or D, follow these steps: 1.
Page 193: Location Of The Screws For Positions A And D
7-35 Maintenance and Service Guide 3. Remove the mounting screws on the left side of the appropriate drive housing as- sembly (Figure 7-37). Figure 7-38. Removing a Mass Storage Device from Position A. Figure 7-37. Location of the Screws for Positions A and D. 4.
Page 194: Power Cable Connections For Drive Positions A And D
7-36 Chapter 7, Removal and Replacement Procedures Removal and Replacement To replace a mass storage device in drive posi- tions A or D, reverse Steps 1 through 4 of the Procedures for Drive Positions B or C preceding removal procedures. When you recon- To remove a mass storage device from drive nect the power cable, follow the guidelines for positions B or C, follow these steps:...
Page 195: Disconnecting Cables From Mass Storage Device B Or C
7-37 Maintenance and Service Guide 2. Locate and disconnect the signal cable and To replace a half-height storage device in drive the power cable from the back of the mass position B or C, reverse steps 1 through 4, storage device in drive position B or C following the power cable connection guidelines (Figure 7-40).
Page 196 7-38 Chapter 7, Removal and Replacement Procedures To replace a full-height mass storage device in Examine the label on the fixed disk drive to drive positions B or C, follow these steps: determine the controller board for which it was formatted.
Page 197: System Board
7-39 Maintenance and Service Guide 7.16 SYSTEM BOARD NOTE: Software supports drive types in the following manner: Removing the system board requires discon- □ MS-DOS 3.2 or later supports drive type 25 necting the battery. Any time the battery is or 35.
Page 198: Location Of The Power Cable Connectors, Battery Connector, Monitor Power Connector, And Power Supply Connector On The Compaq Deskpro 386 System Board Version 1 (Assy. No. 000401)
(Figures 7-42 and 7-43). Figure 7-42. Location of the Power Cable Connectors, Battery Connector, Monitor Power Connector, and Power Supply Connector on the COMPAQ DESKPRO 386 System Board Version 1 (assy. no. 000401). Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 199 Maintenance and Service Guide Figure 7-43. Location of the Power Cable Connectors, Battery Connector, Monitor Power Connector, and Power Supply Connector on the COMPAQ DESKPRO 386 System Board Version 2 (assy. no. 000558). Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 200: Location Of The Security Lock Switch Connector, Keyboard Connector, And Speaker Connector On The Compaq Deskpro 386 System Board Version 1 (Assy. No. 000401)
(Figures 7-44 and 7-45). Figure 7-44. Location of the Security Lock Switch Connector, Keyboard Connector, and Speaker Connector on the COMPAQ DESKPRO 386 System Board Version 1 (assy. no. 000401). Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 201: Location Of The Security Lock Switch Connector, Keyboard Connector, And Speaker Connector On The Compaq Deskpro 386 System Board Version 2 (Assy. No. 000558)
7-43 Maintenance and Service Guide Figure 7-45. Location of the Security Lock Switch Connector, Keyboard Connector, and Speaker Connector on the COMPAQ DESKPRO 386 System Board Version 2 (assy. no. 000558). Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 202: Removing The System Board
7-44 Chapter 7, Removal and Replacement Procedures 4. Remove the ten mounting screws that To replace the system board, follow these steps: secure the system board to the chassis. 1. Reverse Steps 1 through 5. Be sure to tight- 5. Carefully remove the system board from en the mounting screws because they the chassis (Figure 7-46).
Page 203: Intel 387 Coprocessor
7-45 Maintenance and Service Guide 7.17 INTEL 387 COPROCESSOR To remove the 387 Coprocessor, follow these steps: Removing and replacing the Intel 387™ 1. Complete the removal procedures in the Coprocessor requires that you remove the system following sections: board. The pressure exerted during the removal a.
Page 204 7-46 Chapter 7, Removal and Replacement Procedures 2. Insert the prongs of the coprocessor removal 4. Reposition the coprocessor removal tool on tool under one side of the coprocessor. the opposite side of the coprocessor, and lift this side slightly. Continue repositioning the coprocessor removal tool and lifting the CAUTION sides of the coprocessor until it is released.
Page 205 1 on the coprocessor socket CAUTION (Figure 7-48). 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 for the correct orientation. Pay particular attention to the...
Page 206 7-48 Chapter 7, Removal and Replacement Procedures 5. Complete the replacement procedures in CAUTION the following sections: a. 7.16 SYSTEM BOARD. Be sure to tighten More pressure is needed to press the copro- the mounting screws because they cessor into the socket than is required for provide proper grounding for the installing memory chips.
Page 207: Lost Key
7.18 LOST KEY □ If the user does not have the lock ID number and if the system is unlocked, replace the If the key for a COMPAQ DESKPRO 386 security lock assembly by Personal Computer is lost, you have the...
Page 208: 600-Megabyte Fixed Disk Drive
7-50 Chapter 7, Removal and Replacement Procedures 7.19 300-/600-MEGABYTE FIXED 6. Remove the three cover retaining screws from the rear of the expansion unit DISK DRIVE EXPANSION UNIT (Figure 7-49). Before beginning the following removal and replacement procedures, complete the following steps.
Page 209 7-51 Maintenance and Service Guide Fixed Disk Drive Unit 3. Disconnect the universal drive power cable from the external interface adapter board To remove a fixed disk drive from an expansion in the fixed disk drive expansion unit unit, perform the following steps. (Figure 7-51).
Page 210 7-52 Chapter 7, Removal and Replacement Procedures 4. Remove the three retaining screws securing 5. Carefully slide the drive out of the expansion the fixed disk drive to the expansion unit unit housing. (Figure 7-52). NOTE: A terminating resistor must be in- stalled on the 300-megabyte fixed disk drive if the following is true: □ The drive is in a 300-megabyte...
Page 211 7-53 Maintenance and Service Guide 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 manufacturer. 2. Remove the terminating resistor on the fixed disk drive using needle-nosed pliers (Figure 7-53).
Page 212 7-54 Chapter 7, Removal and Replacement Procedures 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 supply assembly to the expansion unit chassis (Figure 7-54).
Page 213 7-55 Maintenance and Service Guide External Interface Adapter Board 3. Disconnect the universal drive power and power supply cables from the external inter- To remove the external interface adapter board face adapter board (Figure 7-57). from the expansion unit complete the following steps: 1.
Page 214 7-56 Chapter 7, Removal and Replacement Procedures 4. Remove the external interface adapter NOTE: For internal or external switch settings board. for the 300-/600-Megabyte Fixed Disk Drive Expansion Unit, see Chapter 8, NOTE: Inspect new external interface JUMPER POSITIONS AND SWITCH adapter board for shipping damage SETTINGS.
Page 215: 5- To 2-Megabyte 16-Bit Memory Expansion Board
CONTENTS Chapter 8 JUMPER SETTINGS AND SWITCH SETTINGS 8.1 INTRODUCTION 8.2 SYSTEM BOARDS 8.2 32-BIT SYSTEM MEMORY BOARD 8.4 .5- TO 2-MEGABYTE 16-BIT MEMORY EXPANSION BOARD 8.5 1- TO 2-MEGABYTE AND 4- TO 8-MEGABYTE 32-BIT MEMORY EXPANSION BOARDS 8-10 Bank 3 Enabled 8-11 Bank 3 Disabled 8-11...
Page 216 Configuration Switch Bank SW1 8-24 Configuration Switch Bank SW2 8-26 Configuration Switch Bank SW3 8-27 Jumper P1 Settings for the COMPAQ Enhanced Color Graphics Board 8-27 Jumper JP3 Setting for the COMPAQ Enhanced Color Graphics Board 8-27 8.11 VIDEO DISPLAY CONTROLLER BOARDS 8-28 8.12 COMPAQ VIDEO GRAPHICS CONTROLLER BOARD...
Page 217: Jumper Settings And Switch Settings
This chapter shows the switch and jumper loca- □ Tape adapter board tions on the following: □ System board □ COMPAQ Enhanced Color Graphics Board □ 32-bit system memory board □ Video display controller board □ .5- to 2-megabyte 16-bit memory expansion □ COMPAQ Video Graphics Controller Board...
Page 218: System Boards
Chapter 8, Jumper Settings and Switch Settings 8.2. SYSTEM BOARDS Figure 8-1. COMPAQ DESKPRO 386 Personal Computer System Board Version 1 (assy. no. 000401). Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 219: System Board (Assy. No. 000401) Switch Settings
8 MHz (default) CPU boot speed 16 MHz always Reserved COMPAQ VDU, COMPAQ ECG, compatible EGA, RGBI, or VGC (default) Third-party monochrome Table 8-2. Locations for the Processor, Coprocessor, and System ROM on the System Board (assy. no. 000401)
Page 220: Compaq Deskpro 386 System Board Version
Chapter 8, Jumper Settings and Switch Settings Figure 8-2. COMPAQ DESKPRO 386 System Board Version 2 (assy. no. 000558).
Page 221: System Board (Assy. No. 000558) Switch Settings
CPU boot speed 16 MHz except when accessing diskette drive; then 8 MHz (default) CPU boot speed 16 MHz always Reserved COMPAQ VDU, COMPAQ ECG, compatible EGA, RGBI, or VGC (default) Third-party monochrome 80287-3, -6, or -8 coprocessor or no coprocessor installed (default)
Page 222: 32-Bit System Memory Board
Chapter 8, Jumper Settings and Switch Settings 8.3 32-BIT SYSTEM MEMORY BOARD Figure 8-3. 32-Bit System Memory Board (assy. no. 000413).
Page 223: Jumper Settings For The 32-Bit System Memory Board
Maintenance and Service Guide 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 256 Kbytes of base memory selected 1-megabyte E7 to E8 No extended memory E2 to E3, E4 to E5 512 Kbytes of base memory selected 1-megabyte...
Page 224: 5- To 2-Megabyte 16-Bit Memory Expansion Board
Chapter 8, Jumper Settings and Switch Settings 8.4 .5- TO 2-MEGABYTE 16-BIT MEMORY EXPANSION BOARD Figure 8-4. .5- to 2-Megabyte 16-Bit Memory Expansion Board (assy. no. 000458).
Page 225: Memory Configuration For Jumper Settings
Maintenance and Service Guide Table 8-6. Jumper Settings for Table 8-7. Memory Configuration the .5- to 2-Megabyte 16-Bit for Jumper Settings E1-E2 and E5-E6 Memory Expansion Board for the .5- to 2-Megabyte 16-Bit Memory Expansion Board Jumper Selection Function Banks Resulting E1 to E2, E4 to E5 Base address of 4...
Page 226: 1- To 2-Megabyte And 4- To 8-Megabyte 32-Bit Memory Expansion Board
8-10 Chapter 8, Jumper Settings and Switch Settings 8.5 1- TO 2-MEGABYTE AND 4- TO 8-MEGABYTE 32-BIT MEMORY EXPANSION BOARDS 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).
Page 227: Jumper 101 Setting On The 1- To 2-Megabyte
8-11 Maintenance and Service Guide 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.
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 229: Jumper Settings For The Esdi Fixed Disk Drive
8-13 Maintenance and Service Guide Table 8-9. Jumper Settings for the ESDI Fixed Disk Drive Controller Board (assy. no. WD1005WAH). Jumper Jumper Position Function Not installed Reserved Not installed Reserved 2 to 3 Reserved...
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 231: Shunt Jumper And Switch Settings For The Multipurpose Fixed Disk Drive Controller Board (Assy. No. 000336-001 And -021)
8-15 Maintenance and Service Guide Table 8-10. Shunt Jumper and Switch Settings for the Multipurpose Fixed Disk Drive Controller Board (assy. no. 000336-001 and -021) Jumper or Function Switch Setting Switch Position Asynchronous Open connectors on left—serial (Shunt Jumper) communication interface COM1 IRQ4 (default) Open connectors on right—serial interface COM2 IRQ3...
Page 232 8-16 Chapter 8, Jumper Settings and Switch Settings Figure 8-9. Multipurpose Fixed Disk Drive Controller Board (assy. no. 000519 and 000815).
Page 233: Switch Settings For The Multipurpose Fixed Disk Drive Controller Board (Assy. No. 000519 And 000815)
8-17 Maintenance and Service Guide Table 8-11. Switch Settings for the Multipurpose Fixed Disk Drive Controller Board (assy. no. 000519 and 000815) Switch Setting/Function SW500-1 OFF = Primary diskette controller address (default) ON = Secondary diskette controller address SW500-2 OFF = Disable high-speed transfer rates (for systems without 1.2 Megabyte 5¼-Inch Diskette Drive or 40-Megabyte Fixed Disk Drive Backup) (default) ON = Enable high-speed transfer rates (for systems with 1.2 Megabyte 5¼-Inch Diskette Drive or 40-Megabyte Fixed Disk Drive Backup)
Page 234: Fixed Disk Drive Controller Board
8-18 Chapter 8, Jumper Settings and Switch Settings 8.8. FIXED DISK DRIVE CONTROLLER BOARD Figure 8-10. Fixed Disk Drive Controller Board (assy. no. WD1002WAH).
Page 235: Jumper Settings For The Fixed Disk Drive Controller Board (Assy. No. Wd1002Wah)
8-19 Maintenance and Service Guide Table 8-12. Jumper Settings for the Fixed Disk Drive Controller Board (assy. no. WD1002WAH) Jumper Jumper Position Function Reserved; primary controller Reserved; LED operation No connection Reserved...
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: Switch Settings For The Host Adapter Board
8-21 Maintenance and Service Guide Table 8-13. Switch Settings for the Host Adapter Board Function Interrupt select IRQ5 (default) Interrupt select IRQ3 DMA channel 3 (default) DMA channel 1 Base address 300 hex (default) Base address 200 hex...
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: Color Graphics Board
8-23 Maintenance and Service Guide The COMPAQ Enhanced Color Graphics Board CAUTION has two banks of configuration switches (SW1 and SW2) as well as two jumpers (P1 and JP3) Use care when setting the configuration that must be positioned to allow the board to...
Page 240: Sw1 Settings For The Compaq Enhanced Color Graphics Board As The Only Or Primary Video Display Controller Board
(the controller board that is active at power- on or reboot). Refer to Table 8-14. Table 8-14. SW1 Settings for the COMPAQ Enhanced Color Graphics Board as the Only or Primary Video Display Controller Board Switches...
Page 241: Sw1 Settings For The Compaq Enhanced Color Graphics Board As The Secondary Video Display Controller Board
8-25 Maintenance and Service Guide 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 COMPAQ Color, compatible 80 × 25 (640 × 350) Enhanced Color, or COMPAQ...
Page 242: Sw2 Settings For The Compaq Enhanced
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 Configuration Switches Monitor Type COMPAQ Color, compatible Enhanced Color...
Page 243: Setting For A Compaq Color Or Compatible
Enhanced Color Graphics Board The setting for Jumper P1 is determined by the monitor used with the COMPAQ Enhanced Figure 8-13. Setting for a COMPAQ Color or Compatible Color Graphics Board (Figures 8-13 and 8-14). Enhanced Color Monitor. To reset the jumper, remove the jumper from its current pins and press it into place on the correct pins.
Page 244: Video Display Controller Board
8.11 VIDEO DISPLAY Table 8-17. Jumper Settings for the Video Display Controller Board CONTROLLER BOARDS (assy. no. 000031, 000160 and 000345) The COMPAQ video display controller boards Configuration (assy. no. 000031, 000160, 000345, and 000525) Enable high-scan video on external outputs...
Page 245: Jumper Locations For The Video Display
8-29 Maintenance and Service Guide Figure 8-16. Jumper Locations for the Video Display Controller Board (assy. no. 000160). Figure 8-17. Jumper Locations for the Video Display Controller Board (assy. no. 000345).
Page 246: 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 Enable RGBI and composite video (high-scan) (Desktops-default) Disable RGBI and composite video (high-scan) (Portables-default)
Page 247: Compaq Video Graphics Controller Board
8-31 Maintenance and Service Guide 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 Board Jumper Setting Function Reserved–16-bit (video RAM) Reserved–8-bit (video ROM)
Page 248: Asynchronous Communications/Parallel Printer Board
8-32 Chapter 8, Jumper Settings and Switch Settings 8.13 ASYNCHRONOUS COMMUNICATIONS/PARALLEL PRINTER BOARD Table 8-20. Asynchronous Communications/Parallel Printer Board (assy. no. 000570) Switch Settings Switch Function Setting Reserved Always OFF Asynchronous interface 2 = ON ENABLED 2 = OFF DISABLED 3, 4 Parallel Port Select/Disable LPT1 SELECTED...
Page 249 8-33 Maintenance and Service Guide Figure 8-20. Asynchronous Communications/Parallel Printer Board (assy. no. 000570). Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 250: Asynchronous Communications/Parallel Printer
8-34 Chapter 8, Jumper Settings and Switch Settings Table 8-21. Asynchronous Communications/Parallel Printer Board (assy. no. 000990) Switch Settings Switch Function Setting Reserved Always OFF Reserved Always OFF 3, 4 Parallel Port Select/Disable LPT1 SELECTED 3 = ON 4 = ON LPT2 SELECTED 3 = OFF 4 = ON...
Page 251: Asynchronous Communications/Parallel
8-35 Maintenance and Service Guide Figure 8-21. Asynchronous Communications/Parallel Printer Board (assy. no. 000990). Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 252: 600-Megabyte Fixed Disk Drive
REPLACEMENT PROCEDURES, for detailed The 300-/600-Megabyte Fixed Disk Drive Expan- steps. See Chapter 9, MASS STORAGE CON- sion Unit can be used with 386-based COMPAQ FIGURATIONS, for cabling and configurations. desktop systems with ROM revision G or later. Table 8-22. ESDI External Fixed...
Page 253 8-37 Maintenance and Service Guide Figure 8-22. ESDI External Fixed Disk Drive Controller Board. Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 255 CONTENTS Chapter 9 MASS STORAGE CONFIGURATIONS 9.1 THEORY OF OPERATION 9.2 SYSTEM CONFIGURATION Maximum Storage Mirroring Duplexing 9.2 SETTING UP THE EXTERNAL FIXED DISK DRIVE EXPANSION UNIT FDISK Utility Format Command Novell Netware Configuration Addendum 108431-001 (11-88) to Manual No. 108033-003...
Page 257: Mass Storage Configurations
The 300-/600-Megabyte Fixed Disk Drive troller. Special software causes both drives Expansion Unit can be used with a COMPAQ to read and write the same information. DESKPRO 386-based Personal Computer with Example: In this case, the same two 300 system ROM revision G or later.
Page 258: System Configuration
Chapter 9, Mass Storage Configuration 9.2 SYSTEM CONFIGURATION □ Duplexing. The main difference between mirroring and duplexing is that the two NOTE: Internal cables are not interchangeable drives in the mirrored unit operate off one between the system unit and the controller and the two fixed disk drives in expansion unit.
Page 259 Maintenance and Service Guide 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 controller may support only two fixed disk drives.
Page 260: Mirroring
(Figure 9-3). In both Figures 9-2 and 9-3, data Two possible mirroring configurations are written to one fixed disk drive is exactly dupli- currently supported by COMPAQ Computer cated in the other. Corporation. The first uses two 40-Megabyte internal half-height fixed disk drives as shown in Figure 9-2.
Page 261: Duplexing
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- ported with two separate controllers plugged Figure 9-4. Duplexed Twin Expansion Units With Four separately into the System Bus, and requires the 300-Megabyte Fixed Disk Drives.
Page 262: Setting Up The External Fixed Disk Drive Expansion Unit
Chapter 9, Mass Storage Configuration 9.3 SETTING UP THE FDISK Utility EXTERNAL FIXED DISK You must install the FDISK utility (FDISK.SYS) DRIVE EXPANSION UNIT device driver in the CONFIG.SYS file before you can use FDISK with the expansion unit. For NOTE: The EXTDISK.SYS device driver needs detailed information about FDISK, refer to your to be installed in the CONFIG.SYS file...
Page 263: Format Command
FORMAT command, refer to the MS-DOS drives. The Novell ATDISK driver supports user documentation. SFT II (disk mirroring) for a single fixed disk drive controller system. The COMPAQ CPQDSK driver supports SFT II (disk mir- roring) for a single or dual disk controller system.
Page 264 Chapter 9, Mass Storage Configuration □ SFT II (disk duplexing) goes beyond disk □ NVCPQDSK executes disk write operations mirroring in both fault tolerance and perfor- over two times faster than CPQDSK because mance. It helps ensure continuous system it does not perform read-after-write verifica- operation if either a fixed disk drive or a tion.
Page 265 IRQ14 and the other can be IRQ11, IRQ12, or IRQ15. (Most other COMPAQ fixed disk drive controllers use the primary address and IRQ14). 2. Verify that the interrupt level chosen does not conflict with interrupts for other installed devices.
Page 266 9-10 Chapter 9, Mass Storage Configuration 3. Install the external fixed disk drive con- □ If you are running the Novell NETGEN troller. Refer to Chapter 7, REMOVAL program from diskettes, the program AND REPLACEMENT PROCEDURES. prompts you to “Insert the disk 4.
Page 267 9-11 Maintenance and Service Guide 7. If you applied the patch, place the patched 9. Use the “NetWare Installation” option from files on the working copies of the appropri- the NETGEN Main Menu to install NetWare. ate NetWare diskettes. Use the NETGEN NOTE: When installing NetWare on high program to generate and link the NetWare capacity fixed disk drives, the NET-...
Page 268 9-12 Chapter 9, Mass Storage Configuration 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 Advanced Netware SFT NetWare SFT NetWare with TTS INSTOVL 2x SUPPORT 5¼-Inch Diskettes NETGEN...
Page 269: Index
Appendix A Maintenance and Service Guide INDEX Change Interleave 4-23 Conditional Format 4-22 Advanced Diagnostics Diskette 2-2, 3-1, 3-2 Coprocessor Advanced Diagnostics Error Codes (see Removal and Replacement Procedures) Advanced Diagnostics Program Coprocessor Test Advanced Diagnostics Program (see Processor Test) Main Menu Preliminary Steps Test Selection Menu...
Page 270 Appendix A, Index Enhanced Color Graphics Board 8-22 FDISK Utility Enhanced Color Graphics Error Codes 5-28 Fixed Disk Drive (see also Mass Storage Devices) Error Messages and Codes Fixed Disk Drive Backup (Tape) 1-16, 1-17 Advanced Diagnostics Error Codes Fixed Disk Drive Backup (Tape) Error Codes 5-26 EXTDISK Messages...
Page 271 Maintenance and Service Guide COMPAQ Enhanced Color Graphics Board 8-22 Illustrated Parts Catalog COMPAQ Video Graphics 300-/600-Megabyte Fixed Disk Drive Controller Board 8-31 Expansion Unit Parts List 6-21 ESDI Fixed Disk Drive Parts List 6-10 Controller Board 8-12 Spare Parts List, International...
Page 272 Appendix A, Index Maximum Storage Memory Error Codes 5-31 Mass Storage Configurations Memory Test Setting Up The External Fixed Disk Mirroring Drive Expansion Unit Modem Error Codes 5-18 System Configuration Modem Test 4-19 Theory of Operation Monochrome Video Board Test 4-18 Mass Storage Devices Monochrome Video Display Board...
Page 273 Maintenance and Service Guide 80287 Coprocessor 7-23 Battery 7-15 Parallel Interface Test Expansion Boards 7-19 Parallel Printer Error Codes 5-12 Intel 387 Coprocessor 7-45 Parts Catalog (see Illustrated Parts Catalog) Keyboard Performance Specifications Lost Key 7-49 (see Specifications, Operating And Performance) Mass Storage Device(s) 7-33 Power-On Self-Test (POST)/Problem Isolation 2-1...
Page 274 1-14 84-Key Keyboard Serial Error Codes 5-17 Compaq Color Monitor Serial Interface (see Asynchronous Communication Interface) COMPAQ DESKPRO 386 Personal Computer System Unit Setup Program Compaq Dual-Mode Monitor How To Run Setup Compaq Enhanced Keyboard When To Run Setup Compaq Video Graphics Color Monitor...
Page 275 Maintenance and Service Guide Terminating Resistor 7-53 Unconditional Format 4-22 Test Selection Menu User Diagnostics Diskette 3-1, 3-2 Asynchronous Communication Interface 4-18 Diskette Drive 4-17 Fixed Disk Drive 4-20 Video Color Graphics Error Codes 5-28 Fixed Disk Drive Backup (Tape) 4-24 Video Display Unit Error Codes 5-13...

Compaq DESKPRO 386 Maintenance And Service Manual

Table of Contents

Chapter 1 OPERATING and PERFORMANCE SPECIFICATIONS

Figures

Chapter 2 POWER-ON SELF-TEST (POST)/PROBLEM ISOLATION

Chapter 3 SETUP PROGRAM

Test Selection Menu

Chapter 4 ADVANCED DIAGNOSTICS PROGRAM

Chapter 5 ERROR MESSAGES and CODES

Chapter 6 ILLUSTRATED PARTS CATALOG

Removal and Replacement Procedures

Chapter 7 REMOVAL and REPLACEMENT PROCEDURES

Chapter 8 JUMPER SETTINGS and SWITCH SETTINGS

Chapter 9 MASS STORAGE CONFIGURATIONS

Quick Links

Chapters

Need help?

Questions and answers

Related Manuals for Compaq DESKPRO 386

Summary of Contents for Compaq DESKPRO 386