Compaq 386 - Manuals

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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).

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).

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

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

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).

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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