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Thank you for purchasing this Factory Service Manual CD/DVD from servicemanuals4u.com.
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Foreword Notice The information in this guide is subject to change without notice. Compaq Computer Corporation shall not be liable for technical or editorial errors or omissions contained herein; nor for incidental or consequential damages resulting from the furnishing, performance, or use of this material. This guide contains information protected by copyright. No part of this guide may be photocopied or reproduced in any form without prior written consent from Compaq Computer Corporation.
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Chapter 6, "Illustrated Parts Catalog," provides an illustrated reference for COMPAQ PORTABLE II Personal Computer spare parts. Chapter 7, "Removal and Replacement Procedures," describes how to remove and replace field replaceable subassemblies. Chapter 8, "Jumper Settings, Switch Settings, and Adjustments," provides detailed information for setting jumpers and switches and performing monitor adjustments.
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Personal Computer. o o o o o o o Operations Guide MS-DOS VERSION 3 REFERENCE GUIDE Technical Reference Guide HOW TO DO BUSINESS WITH COMPAQ SERVICE COMPAQ SERVICE QUICK REFERENCE GUIDE COMPAQ Service Advisories and Bulletins COMPAQ QuickFind Support Reference Library >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< WARNING The computer is designed to be electrically grounded.
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Chapter 1. Operating and Performance Specifications Chapter 1.0 Introduction This chapter contains operating and performance specifications for the COMPAQ PORTABLE II Personal Computer. Chapter 1.1 System Unit Table 1-1. Electrical and Mechanical Specifications ============================================================================== Dimensions: Height 7.5 in. (19.0 cm) Depth 13.9 in. (35.3 cm) Width 17.7 in. (45.
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============================================================================== Chapter 1.2 Keyboard Table 1-2. Keyboard Specifications ============================================================================== Dimensions: Height 1.3 in. (3.30 cm) Depth 7.0 in. (17.78 cm) Width 17.1 in. (43.43 cm) Number of Keys 84 Keyboard: Cable Length 60.00 in. (152.4 cm) Coil Diameter 0.75 in. (1.9 cm) Coil Length 11.00 in. (27.
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Data Transfer Rate 5.0 Mb/s Type 1 ============================================================================== Chapter 1.5 20 Megabyte Fixed Disk Drive Table 1-5. 20 Megabyte Fixed Disk Drive Specifications ============================================================================== Dimensions: Height 1.7 in. (4.32 cm) Depth 4.1 in. (10.41 cm) Width 5.75 in. (14.61 cm) Weight 1.8 lb (0.
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Tracks per Inch 96 (1.2 megabyte format) 48 (360 Kbyte format) Number of Tracks 80 (1.2 megabyte format) 40 (360 Kbyte format) Data Transfer Rate 500 Kb/s (1.2 megabyte format) 300 Kb/s (360 Kbyte format) ============================================================================== Chapter 1.8 1.44 Megabyte Diskette Drive Specifications Table 1-8. 1.44 Megabyte Diskette Drive Specifications ============================================================================== Dimensions: Height 0.90 in. (2.
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Chapter 2. Power On Self Test/Problem Isolation 2.1 Power On Self Test The Power On Self Test (POST) is a series of diagnostic tests performed automatically when the system is turned on. These tests verify that the computer system is operating properly. If a subassembly fails POST, an error code appears on the screen. To start POST, follow these steps. 1. Turn off the computer. 2. Disconnect the signal cables of any peripheral devices (printers, modems, and so on) from the computer. 3.
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NO: Replace the AC power fuse (refer to Chapter 7 in this guide for AC power fuse removal and replacement information). Repeat steps 1 and 2. 3. Did you hear an audible beep or see an error code on the screen? YES: See Chapter 5, "Error Messages and Codes" for information on how to identify and correct either audible or error code related problems. NO: Proceed to step 4. 4. Check the system LED on the system board. YES: Proceed to step 5. Is it lit? If you did not hear the fan, replace it now.
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controller board. o If a color graphics or composite video monitor is not available, replace the video display controller board. o If a color graphics or composite video monitor is not available and replacing the video display controller board does not solve the problem, replace the internal video display unit. If you do not hear a beep, replace the system board. If you hear any other audible sounds, refer to Chapter 5 for more information on POST related error messages. 6.
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Chapter 3. Setup Please consult the SUPPORT SOFTWARE MAINTENANCE AND SERVICE GUIDE for current information on SETUP.
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Chapter 4. Diagnostic Procedures Please consult the SUPPORT SOFTWARE MAINTENANCE AND SERVICE GUIDE for current information on DIAGNOSTICS.
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Chapter 5. Error Messages and Codes 5.0 Introduction This section contains Power On Self Test (POST) messages, DIAGNOSTIC error codes, and memory error codes. The messages and codes are given in tables that list the message or error code, a description of the error, the probable cause of the error, and the action required to resolve the error condition. Chapter 5.1 Power On Self Test Messages An error message results if a problem is encountered during the Power On Self Test.
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XX000B YYZZ 201 Memory Error None RAM failure Refer to Section 5.3, "Memory Related Error Codes." -----------------------------------------------------------------------------301 - Keyboard Error None Keyboard failure Replace the keyboard. -----------------------------------------------------------------------------303 - Keyboard None Keyboard Replace the system board.
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DIAGNOSTICS error codes occur if the system recognizes a problem while running the DIAGNOSTICS program. These error codes help identify possible defective subassemblies. Table 5-2 through 5-12 list possible error codes, a description of the error condition, and the action required to correct the condition. In each case, the Recommended Action column lists steps necessary to correct the problem. After completing each step, run the DIAGNOSTICS program to verify that the error condition has been corrected.
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Codes Error Description Recommended Action -----------------------------------------------------------------------------102 - 10 Numeric coprocessor real The following steps apply number calculation test failed to error codes 102 - 01 through 102 - 15: 102 - 11 Numeric coprocessor speed test failed 1. Replace the numeric coprocessor and retest. 102 - 12 Numeric coprocessor pattern 2. Replace the system test failed board and retest.
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107 - 01 CMOS RAM test failed 108 - 02 CMOS interrupt test failed -----------------------------------------------------------------------------Error Codes Error Description Recommended Action -----------------------------------------------------------------------------108 - 03 CMOS interrupt test, CMOS not Replace the system board properly initialized and retest for error codes 103 - 01 through 113 - 01. 109 - 01 CMOS clock load data test failed.
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114 - 01 Speaker test failed 1. Verify speaker connection. 2. Replace the speaker and retest. 3. Replace the system board and retest. ============================================================================== Table 5-3.
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8 - 02 Error during saving program memory in refresh test 208 - 03 Error during restore program memory in refresh test 210 - xx Incrementing pattern test failed (expanded memory test) 210 - 01 Data read from block did not match data written to error codes 203 - 01 through 211 - 03: 1.
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303 - 02 Keyboard LED test, reset test failed 303 - 03 Keyboard LED test, reset test failed 303 - 04 Keyboard LED test, LED command test failed 303 - 05 Keyboard LED test, LED command test failed 303 - 06 Keyboard LED test, LED command test failed 303 - 07 Keyboard LED test, LED command test failed -----------------------------------------------------------------------------Error Codes Error Description Recommended Action ---------------------------------------------------------------------------
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402 - 07 Printer loopback, data, and control registers failed 402 - 08 Printer interrupt test failed 402 - 09 Printer interrupt and data register failed 402 - 10 Printer interrupt and control register failed 402 - 11 Printer interrupt, data, and control register failed 402 - 12 Printer interrupt and loopback failed 402 - 13 Printer interrupt, loopback and data register failed 402 - 14 Printer interrupt, loopback and control register failed 402 - 15 Printer interrupt, loopback, data, and con
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509 - 01 Video 320 x 200 mode color set 1 test failed 510 - 01 Video 640 x 200 mode test failed 511 - 01 Video screen memory page test failed 512 - 01 Video gray scale test failed 514 - 0l Video white screen test failed 516 - 01 Video noise pattern test failed -----------------------------------------------------------------------------517 - 01 Lightpen text mode test failed - no The following steps apply response to error codes 517 - 01 through 517 - 04: 517 - 02 Lightpen text mode test failed in
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614 - 02 Exceeded maximum hard error limit 614 - 03 Previously exceeded maximum soft error limit 6. drive and retest. Replace the system board and retest.
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or the multipurpose controller board. 3. Replace the diskette power and signal cables and retest. 4. Replace the multipurpose fixed disk drive controller board or multipurpose controller board and retest. 5. Replace the diskette drive and retest 6. Replace the system board and retest. -----------------------------------------------------------------------------699 - 00 Diskette drive/media ID error Rerun the SETUP program.
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1101 - 14 Serial port test, DRIVER/RECEIVER data failure -----------------------------------------------------------------------------1102 - 58 Serial Port COM1 set to INTR 3 1102 - 60 Serial Port COM2 set to INTR 4 1102 - 64 Serial Port data compare error 1102 - 72 Serial Port no TX RDY 1102 - 88 Serial Port no RX RDY ============================================================================== Table 5-9.
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1201 - 16 Modem ROM, checksum failure through 1210 - xx: 1201 - 17 Tone detection failure 1.
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1210 - 05 XMIT exceeded carrier lost limit 1210 - 06 Timed out waiting for dial tone 1210 - 07 Dial number string too long -----------------------------------------------------------------------------Error Codes Error Description Recommended Action -----------------------------------------------------------------------------1210 - 08 Modem timed out waiting for remote The following apply to response error codes 1201 - xx through 1210 - xx: 1210 - 09 Modem exceeded maximum redial limit 1.
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1704 - xx Fixed disk drive random seek test failed 1705 - xx Fixed disk drive controller test failed 2. 1706 - xx Fixed disk drive ready test failed 3. 1707 - xx Fixed disk drive recalibrate test failed 1708 - xx Fixed disk drive format bad track test failed 1709 - xx Fixed disk drive reset controller test failed 1710 - xx Fixed disk drive park head test failed 1714 - xx Fixed disk drive file write test failed 1715 - xx Fixed disk drive head select test failed 4. 5.
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17yy - 4l Drive not ready 17yy - 42 Recalibration failed -----------------------------------------------------------------------------Error Codes Error Description Recommended Action -----------------------------------------------------------------------------17yy - 43 Failed to format bad track The following steps apply to error codes 1700 - xx 17yy - 44 Failed fixed disk drive controller through 1716 - xx: board diagnostics 1.
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17yy - 63 Failed soft error rate 3. 17yy - 65 Exceeded maximum bad sector per track 17yy - 66 Failed initial drive parameter 17yy - 67 Failed to write long 17yy - 68 Failed to read long 4. 17yy - 69 Failed to read drive size from controller 5. 17yy - 70 Failed translate mode 17yy - 71 Failed nontranslated mode 17yy - 72 Bad track limit exceeded cables and retest.
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-----------------------------------------------------------------------------Error Codes Error Description Recommended Action -----------------------------------------------------------------------------2417 - 01 Lightpen text mode failed - no The following steps apply response to error codes 2417 - 01 through 2417 - 04: 2417 - 02 Lightpen text mode test failed invalid response 1. Replace the lightpen and retest. 2417 - 03 Lightpen medium resolution mode test 2.
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3. Replace the Multipurpose Controller Board, Multipurpose 8601 - 08 Timeout occurred Fixed Disk Drive Controller Board, or 8601 - 10 Pointing device inoperative Serial/Parallel Interface Board and retest. 4. Replace the system board and retest. ============================================================================== 8601 - 07 Right block not selected Chapter 5.
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Defective Memory Chip Isolation Map for System Boards using 64K RAMs and 256K RAMs Memory error codes are in the format XX000B YYZZ. XX is the memory segment of detected error.
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YY Bit location of the low byte (B = 0) ZZ Bit location of the high byte (B =1) For example, for the Version 1 system board, memory error message "02000 10010" specifies chip U47. Use Tables 5-14 through 5-17 to locate the defective chip and determine the required action. NOTE: If XX or YY is not documented in the following tables, this may mean that more than one area contributed to the error condition.
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10 U46 U47 Replace system board 20 U46 U47 Replace system board 40 U46 U47 Replace system board 80 U46 U47 Replace system board ============================================================================== Table 5-15.
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============================================================================== XX = 00, 02, 04, 06 (Bank 0) -----------------------------------------------------------------------------Data Bit B = 0 B = 1 YY or ZZ Low High Required Action -----------------------------------------------------------------------------00 U37 U38 Replace memory chip 01 U30 U31 Replace memory chip 02 U25 U26 Replace memory chip 04 U21 U22 Replace memory chip 08 U16 U17 Replace memory chip 10 U14 U15 Replace me
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04 U9 U12 Replace memory chip 08 U41 U42 Replace memory chip 10 U33 U34 Replace memory chip 20 U25 U26 Replace memory chip 40 U18 U19 Replace memory chip 80 U10 U11 Replace memory chip -----------------------------------------------------------------------------XX = 08 (Bank 1) -----------------------------------------------------------------------------Data Bit B = 0 B = 1 YY or ZZ Low High Required Action -----------------------------------------------------------------------------00 U
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refer to Chapter 7. Table 5-18. Memory Locations/Required Action for 512/1536 Kbyte System Memory Board Mapped to the 1 to 2.
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01 U28 U4 Replace memory chip 02 U29 U5 Replace memory chip 04 U30 U6 Replace memory chip 08 U36 U12 Replace memory chip 10 U37 U13 Replace memory chip 20 U38 U14 Replace memory chip 40 U45 U21 Replace memory chip 80 U46 U22 Replace memory chip -----------------------------------------------------------------------------XX = 20, 22, 24, 26 (Bank 4) -----------------------------------------------------------------------------Data Bit B = 0 B = 1 YY or ZZ Low High Required Action -
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Chapter 6. Illustrated Parts Catalog 6.0 Introduction This section provides a spare parts reference for the COMPAQ PORTABLE II Personal Computer. Each table in this section contains the following information: o Item - reference number keyed to an illustration. o Part Number - to be used when ordering parts from Compaq Computer Corporation. o Description - name of the particular part or parts kit. NOTE: When several parts have the same part number, the parts are available only as part of a kit.
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107678-001 Spanish Enhanced Keyboard Assembly --------------------------------------------------------------------------** Part number no longer available. ============================================================================== Chapter 6.2 Chassis Table 6-2.
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** Part number no longer available. ============================================================================== Chapter 6.3 Common Chassis Table 6-3.
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-----------------------------------------------------------------------------1 104180-001 ** Power Supply Chassis 2 104178-001 ** Fan Assembly 3 104273-001 ** Automatic Power Switching (APS) Board 4 106886-001 Serial/Parallel Interface Board 5 104174-001 102705-001 ** Multipurpose Fixed Disk Drive Controller Board Multipurpose Controller Board 6 109196-001 ** 106686-001 Enhanced Color Graphics Board Enhanced Color Graphics ROM 7 101340-001 ** Video Display Controller Board 8 105033-001 **
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23 104176-001 ** 512/1536 Kbyte System Memory Board 24 104186-001 ** Battery 25 104008-002 26 104185-001 ** Speaker/Brightness Potentiometer Assembly 27 * Drive Shoulder Bolt 28 * Vibration Isolators ** Diskette Drive Signal Cable 29 104048-001 ** Storage Device Enclosure -----------------------------------------------------------------------------* Contained in the Miscellaneous Hardware Kit (Spare PN 104270-001 **). See Table 6-7. Contained in the Cable Kit, Spare PN 104191-001 **.
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Chapter 6.4 Mechanical Chassis Table 6-4.
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Table 6-5.
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3. Fixed Disk Drive Controller Signal Cable 1 4. Speaker/Potentiometer Cable 1 5. Diskette Drive Signal Cable 1 6. Fixed Disk Drive Power Cable 1 ============================================================================== Chapter 6.7 Miscellaneous Hardware Kit Table 6-7.
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Chapter 7. Removal and Replacement Procedures 7.1 Preparation Before beginning the procedures in this section, complete the following steps: 1. Turn off the computer. 2. Close the keyboard and secure it by sliding the latches to the LOCK position (Figure 7-1) and folding the keyboard feet in place. 3. Disconnect any peripheral devices (printers, monitors, and so on) from the computer. 4. Disconnect the AC power cord from the AC outlet and from the computer (Figure 7-2).
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Chapter 7.2 AC Power Fuse To remove the AC power fuse, complete the following steps: 1. Complete the preparation procedures (see Section 7.1). 2. Slide open the AC power compartment to expose the line filter ON/OFF switch (Figure 7-3).
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3. Insert a flat bladed screwdriver along the bottom edge of the fuse box. Lift outward with enough pressure to force the fuse box out of the casing (Figure 7-4). 4. When the fuse box is removed, locate the spare fuse provided in the holding area in the fuse box (Figure 7-5). Lift the fuse out and replace it with the spare fuse. 5. Slide the fuse box back into place. snap into place. Press the cover in until you feel it NOTE: Use only a fuse with a 3 Ampere current rating.
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Chapter 7.3 Outer Access Casing To remove the outer access casing from the computer, complete the following steps: 1. Complete the preparation procedure (see Section 7.1). 2. Place the computer keyboard side down on a level work surface. Slide open the AC power access panel and the peripheral connector access panels. Using a Torx screwdriver, remove the mounting screws from the AC power and peripheral connector access areas (Figures 7-6 and 7-7).
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3. Remove the outer access casing by grasping it close to the AC power and peripheral connector access panels and sliding the cover towards you. Slide it completely off the system chassis (Figure 7-8) and set it aside. NOTE: The outer access casing is flexible and will bend as needed.
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To replace the outer access casing, reverse steps 2 and 3. Chapter 7.4 Keyboard Assembly To remove the keyboard assembly, complete the following steps: 1. Remove the cable tray access plate (see Section 7.13). 2. Disconnect the keyboard cable connector from the J116 socket connector on the system board (Figure 7-9).
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3. Lower the rear portion of the computer so that it rests flatly against the work surface (Figure 7-10). 4. Unlock the keyboard latches and gently slide the keyboard cable from inside the computer system chassis (Figure 7-11). Remove the keyboard from the computer system chassis.
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To replace the keyboard assembly, reverse steps 1 through 4. Chapter 7.5 Front Bezel To remove the front bezel, complete the following steps: 1. Remove the keyboard assembly (see Section 7.4). 2. Remove the brightness control knob by gently pulling it from the front bezel (Figure 7-12).
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3. Lift the rear portion of the computer so that it rests firmly on the front bezel (Figure 7-13). 4. Using a Torx screwdriver, remove the six screws that secure the front bezel to the system chassis (Figure 7-14).
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5. Lower the system chassis and gently pull the front bezel from the system chassis (Figure 7-15). To replace the front bezel, reverse steps 1 through 5. Chapter 7.
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o o o Line filter ON/OFF switch assembly Power supply assembly board Power supply insulating paper To remove the power supply subassembly chassis, complete the following steps: 1. Remove the outer access casing (see Section 7.3). 2. Place the computer on its side (see Figure 7-16). 3. Using a Torx screwdriver, loosen (DO NOT REMOVE) the nine mounting screws that secure the power supply chassis to the system chassis (Figure 7-17).
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4. Remove only the two screws indicated in Figure 7-18.
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5. Remove the power supply subassembly chassis by lifting the rear portion of the chassis upward. As this end is raised, lift the front portion of the chassis until the entire power supply chassis is free of the system chassis (Figure 7-19). NOTE: Because the power supply connects directly to the system board, be careful when removing the power supply subassembly chassis. 6.
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computer system chassis, disconnect the fan assembly and the automatic power switching board (Figure 7-20). 7. Gently lift and remove the power supply subassembly from the system chassis. To replace the power supply subassembly chassis, reverse steps 1 through 6. Chapter 7.7 Fan Assembly To remove the fan assembly, complete the following steps: 1. Remove the power supply subassembly chassis (see Section 7.6). 2. Cut the two cable ties that secure the fan assembly power cable to the system chassis.
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To replace the fan assembly, reverse steps 1 through 3. Chapter 7.8 Automatic Power Switching Board (APS) 1. Remove the power supply subassembly chassis (see Section 7.6). NOTE: Carefully remove all three connections to the APS board when removing the power supply chassis. Refer to Figure 7-22 for an illustration of the APS board.
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2. To remove the APS board, which is secured to the system chassis by four PCB standoffs, press the top of each PCB standoff together, one at a time. At the same time, carefully lift that portion of the APS board from the system chassis. Repeat this procedure until all board standoffs have been disconnected from the APS board, then lift and remove the APS board from the system chassis (Figure 7-23).
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1. Slide the APS Board into place on the system 2. Press the four PCB standoffs into the holes in the board. 3. Hold the power supply subassembly at a 30 to 45 degree angle as shown in Figure 7-24, and tie the three wire harnesses together with a ty-wrap. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< CAUTION When reassembling the APS board, be sure to reconnect the fan.
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2. Using a Torx screwdriver, loosen (DO NOT REMOVE) the 11 mounting screws that secure the high voltage monitor access plate to the system chassis. Remove only the three mounting screws indicated in Figure 7-25. 3. Gently slide the high voltage access plate towards the power supply chassis assembly and lift it up and away from the system chassis. To replace the high voltage access plate, reverse steps 1 through 3. Chapter 7.
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3. Gently slide the board slots access plate to the right of the computer and lift it up and away from the system chassis. To replace the board slots access plate, reverse steps 1 through 3. Chapter 7.11 Mass Storage Device Access Plate The mass storage device access plate is located at the front of the system chassis and covers all installed mass storage devices. To remove the mass storage device access plate, complete the following steps: 1. Remove the outer access cover (See Section 7.3).
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3. Carefully lift the mass storage device access plate away from the system chassis. To replace the mass storage device access plate, reverse steps 1 through 3. Chapter 7.12 System Memory Board Access Plate To remove the system memory board access plate, complete the following steps: 1. Remove the outer access casing (see Section 7.3). 2. Turn over the system chassis as illustrated in Figure 7-28.
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3. Using a Torx screwdriver, loosen (DO NOT REMOVE) the seven mounting screws that secure the system memory board access plate to the system chassis. Remove only the one mounting screw indicated in Figure 7-29. 4. Carefully lift and remove the system memory board access plate from the system chassis (Figure 7-29). To replace the system memory board access plate, reverse steps 1 through 4.
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Chapter 7.13 Cable Tray Access Plate To remove the cable tray access plate, complete the following steps: 1. Remove the outer access casing (see Section 7.3). 2. Remove the system memory board access plate (see Section 7.12). 3. Turn over the system chassis as illustrated in Figure 7-30. 4. Using a Torx screwdriver, loosen (DO NOT REMOVE) the seven Torx screws that secure the cable tray access plate to the system chassis. Remove only the two mounting screws noted in Figure 7-31.
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5. Carefully lift and remove the cable tray access plate from the system chassis. To replace the cable tray access plate, reverse steps 1 through 5. Chapter 7.14 Multipurpose Controller Board The Multipurpose Controller Board is located in slot J104 on the system board (Figure 7-32). To remove the multipurpose controller board, complete the following steps.
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1. Remove the board slots access plate (see Section 7.10). 2. Disconnect the mass storage device signal cable(s) as shown in Figure 7-33. NOTE: If a fixed disk drive is installed in the system chassis, you must disconnect two signal cables. 3. Using a Torx screwdriver, remove the board retaining screw.
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lift the controller board up and out of the system board (Figure 7-34). To replace the Multipurpose Controller Board, reverse steps 1 through 3. Chapter 7.15 Video Display Controller Board The Video Display Controller Board is located in slot J103 on the system board (Figure 7-35).
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To remove the Video Display Controller Board, complete the following steps: 1. Remove the board slots access plate (see Section 7.10). 2. Remove the retaining screw that secures the Video Display Controller Board. Then disconnect the video display signal cable (Figure 7-36). 3. Carefully lift the board up and out of its J103 connector location on the system board (Figure 7-37).
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To replace the Video Display Controller Board, reverse steps 1 through 3. Chapter 7.16 512/2048 KByte Memory Expansion Board The COMPAQ PORTABLE II Personal Computer may contain up to two option boards. Option boards are always installed in the back two slots of the system chassis. To remove a COMPAQ 512/2048 Kbyte Memory Expansion Board or any other option board installed in the computer, complete the following steps: 1. Remove the outer access casing (See Section 7.3). 2.
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To replace the 512/2048 Kbyte Memory Expansion Board or other option boards, reverse steps 1 through 4. Chapter 7.17 Handle To remove the handle from the computer, complete the following steps: 1. Remove the outer access casing (see Section 7.3). 2. Remove the board slots access plate (see Section 7.10). 3. Remove all controller and option boards installed (see Sections 7.14 through 7.16). 4.
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To replace the handle, reverse steps 1 through 4. Chapter 7.18 System Board There are two versions of the system board for the COMPAQ PORTABLE II: version 1 (Assy No. 000318) and version 2 (Assy No. 000324). The two system boards differ in shape, memory chip locations, and jumper locations (Figures 7-40 and 7-41).
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To remove either system board, complete the following steps: 1. Remove the power supply subassembly chassis (see Section 7.6). 2. Remove the board slots access plate (see Section 7.10). 3. Remove all controller and option boards installed (see Sections 7.14 through 7.16). 4. Using Figure 7-42 as a reference, disconnect the mass storage device power cable.
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5. Remove the system memory board access plate (see Section 7.12). 6. Remove the cable tray access plate (see Section 7.13). 7. Using Figure 7-43 as a reference, disconnect the keyboard power cable, the video display unit power cable, and the speaker/brightness control cable.
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8. Using a Torx screwdriver, remove the eight mounting screws that secure the system board to the system chassis. 9. Carefully lift the system board from the System chassis (Figure 7-44). To replace the system board, reverse steps 1 through 9. If replacing a Version 1 board with a Version 2 board, the speaker/brightness potentiometer assembly (PN 104185-001 no longer available) should be replaced with an assembly containing a longer wiring harness.
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1. Remove the 512/1536 Kbyte System Memory Board access plate (see Section 7.12). 2. The battery is secured to the bottom of the system board by a snap in connector and cable tie. Remove the battery by first cutting the cable tie then lifting the battery from its snap in connector (Figure 7-45). >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< CAUTION Make sure the polarity is correct when replacing the battery.
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steps: 1. Remove the outer access casing (see Section 7.3). 2. Remove the Memory Expansion Board access plate (see Section 7.12). 3. The memory board is secured to the system board by six PCB standoffs. To remove the memory board from the system board, press the top of each PCB stand off together, one at a time. At the same time, gently lift that portion of the memory board from the stand off. Repeat this procedure until all PCB standoffs have been disconnected from the system memory board. 4.
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o For the system board removal and replacement procedure refer to Section 7.18. o For the 512/1536 Kbyte System Memory Board removal and replacement procedure, refer to Section 7.20. NOTE: The RAM and ROM chip locations on the system boards differ from those on the memory boards (See Figures 7-47 through 7-50).
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2. Using an IC removal tool, remove the defective RAM or ROM chip(s) (Figure 7-51). 3. Using a special IC insertion tool, replace the defective RAM or ROM chip(s) (Figure 7-52).
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4. Replace the memory board. NOTE: After replacing the defective component, run DIAGNOSTICS to verify proper operation of the computer. (Please consult the SUPPORT SOFTWARE MAINTENANCE AND SERVICE GUIDE for current information on DIAGNOSTICS.) Chapter 7.22 Mass Storage Device Subassembly Mass storage device subassemblies for the COMPAQ PORTABLE II Personal Computer consist of fixed disk drives and diskette drives. Refer to Figure 7-53 for the location of each type of mass storage device subassembly.
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Mass Storage Device Subassembly Enclosure To remove the mass storage device subassembly enclosure, complete the following steps: 1. Remove the outer access casing (see Section 7.3). 2. Remove all installed controller and option boards (see Sections 7.14 through 7.16). 3. Using a screwdriver, gently pry the drive bezel from the front bezel (Figure 7-54). This exposes the installed mass storage devices.
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4. Using a Torx screwdriver, remove the two screws on the right side of the system chassis and the four screws on the top of the mass storage device enclosure. These screws secure the mass storage device subassembly enclosure to the system chassis (Figure 7-55). 5. Slide the mass storage device subassembly enclosure forward a few inches by reaching into the open system chassis area and pushing the enclosure forward. This action will expose the mass storage power cables (Figure 7-56).
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6. Disconnect the diskette drive and fixed disk drive power cable from the system board (Figure 7-57). 7. Grasp the sides of the mass storage device subassembly enclosure firmly and slide the enclosure out of the system chassis (Figure 7-58).
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To replace the mass storage device subassembly enclosure, reverse steps 1 through 7. Fixed Disk Drive To remove the fixed disk drive assembly: 1. Remove the mass storage device subassembly enclosure (see Section 7.22). 2. Using a Torx screwdriver, remove the two shoulder bolts and vibration isolators from either side of the mass storage device subassembly enclosure. Slide the fixed disk drive assembly enclosure out of the mass storage device subassembly (Figure 7-59).
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NOTE: The fixed disk drive is mounted above the diskette drive. To replace the fixed disk drive assembly, reverse steps 1 and 2. Diskette Drive To remove the diskette drive assembly, complete the following steps: 1. Remove the mass storage device subassembly enclosure (see Section 7.22). 2. Using a Torx screwdriver, remove the two shoulder bolts that secure the diskette disk drive assembly from either side of the mass storage device subassembly enclosure (Figure 7-60). 3.
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NOTE: When removing the diskette drive, make sure the vibration isolators are not lost. You need to reinstall all four isolators when replacing the diskette drive assembly. To replace the diskette drive assembly, reverse steps 1 through 3. NOTE: When replacing a flip door style diskette drive with a push button style diskette drive, you should also order a replacement drive bezel (PN 104059-001 (No longer available)) to provide a better fit for the new diskette drive assembly. Chapter 7.
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5. Remove the brightness potentiometer by first unscrewing the nut that secures it to the system chassis, then push the brightness potentiometer out of the system chassis (Figure 7-62). To replace the speaker and the brightness potentiometer, reverse steps 1 through 5. Chapter 7.
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To remove the video display unit (VDU), complete the following steps: 1. Remove the keyboard assembly (see Section 7.4). 2. Disconnect the VDU power cable (Figure 7-63). 3. Lower the computer so that it appears as illustrated Figure 7-64.
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4. Remove the high voltage access plate (see Section 7.9). 5. Remove the front bezel (see Section 7.5) 6. Disconnect the VDU signal cable from the VDU (Figure 7-65). 7. The VDU high voltage cable is secured to the system chassis by a push mount with a snap connector at the end. Disconnect the VDU high voltage cable by first unsnapping the push mount and then removing the cable from its place inside the connector (Figure 7-66).
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8. The VDU sweep board is secured to the system chassis by five PCB stand off mounts and one screw. Using a Torx screwdriver, remove the grounding screw in the upper left corner of the VDU sweep board. To remove the VDU sweep, grasp the board and gently slide it upward until the standoffs clear the mounting holes. Once the VDU sweep board clears all standoffs, slide the board out of the mounting holes and let it come to rest on the side of the VDU (Figure 7-67). 9.
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10. Remove the VDU from the system chassis by grasping the display screen and the VDU sweep board and then sliding the unit until it is out of the system chassis (Figure 7-69). If replacement is necessary, this unit may be shipped back to Compaq Computer Corporation packed only in a Compaq Spare VDU box.
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To replace the video display unit, reverse steps 1 through 10. NOTE: When replacing the VDU assembly, replace the two top front mounting screws first. This helps align the screen correctly. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< CAUTION The video display unit is fragile; be careful when handling it. Be careful not to disturb the VDU adjustment potentiometers on the VDU sweep board and not to break the display tube.
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Chapter 8. Jumper Settings, Switch Settings, and Adjustments 8.1 System Board Jumper Settings Figure 8-1 shows the jumper locations on the COMPAQ PORTABLE II Version 1 system board. Refer to Table 8-1 when setting the jumpers on this board. Figure 8-2 shows the jumper locations on the COMPAQ PORTABLE II Version 2 system board. Refer to Table 8-1 when setting the jumpers on this board.
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Table 8-1.
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Refer to Tables 8-2 and 8-3 when setting the jumpers on the 512/2048 Kbyte Memory Expansion Board. Table 8-2. 512/2048 Kbyte Memory Expansion Board Jumper Settings ============================================================================== Settings Address Range * -----------------------------------------------------------------------------E1 to E2, E5 to E6 1 to 3 megabyte E1 to E2, E4 to E5 2.5 to 4.
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============================================================================== Table 8-3.
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6 Reserved OFF 7 Reserved OFF 8 Reserved ON ============================================================================== Chapter 8.4 Multipurpose Controller Board Switch Settings Figures 8-5 through 8-9 show the switch and jumper locations on the Multipurpose Controller Boards and the Multipurpose Fixed Disk Drive Controller Boards. Refer to Tables 8-5 through 8-7 when setting the switches and jumpers. Table 8-5.
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Settings (Assy Nos.
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Table 8-7. Multipurpose Fixed Disk Drive Controller Boards Switch and Jumper Settings (Assy Nos. 000519 and 000815) ============================================================================== Switch Setting Function -----------------------------------------------------------------------------SW500-1 OFF Primary diskette and fixed disk drive address select (default) ON Secondary diskette and fixed disk drive address select SW500-2 OFF ON Disable high speed transfer rates for systems without 1.
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Chapter 8.5 Fixed Disk Drive Controller Board Figure 8-10 shows the jumper locations for the Fixed Disk Drive Controller Board (Assy No. WD1003IWH). Refer to Table 8-8 when setting the jumpers. Table 8-8. Fixed Disk Drive Controller Board Jumper Settings (Assy No.
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-----------------------------------------------------------------------------W1 Reserved W2 Reserved W3 1-2 2-3 20 Megabyte Fixed Disk Drive 10 Megabyte Fixed Disk Drive W4 Reserved ============================================================================== Chapter 8.6 Video Display Controller Board Jumper Settings Figures 8-11 through 8-14 show the jumper locations on the Video Display Controller Board. Refer to Tables 8-9 and 8-10 when setting the jumpers. Table 8-9.
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-----------------------------------------------------------------------------J3/J5 RGB enable/disable (high scan) Pin 1 to Pin 2 - Disables RGB and composite video Pin 2 to Pin 3 - RGB and composite video enable ==============================================================================
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Chapter 8.7 Enhanced Color Graphics Board Switch and Jumper Settings Figures 8-15 and 8-16 show the switch and jumper locations on the Enhanced Color Graphics Boards. Refer to Table 8-11 when setting the switches and jumpers. Table 8-11. Enhanced Color Graphics Board Switch Settings (Assy Nos.
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SW1 Settings (As the Only or Primary Video Display Controller Board) 1 2 3 4 Monitor Type Power On Mode Mode -----------------------------------------------------------------------------OFF ON ON OFF COMPAQ Color, Compatible 80 x 25 Color Enhanced Color or COMPAQ (640 x 350) Dual Mode ON ON ON OFF COMPAQ Color, Compatible Enhanced Color or COMPAQ Dual Mode 80 x 25 (640 x 200) Color OFF OFF OFF ON RGBI Color or COMPAQ Dual Mode 80 x 25 (640 x 200) Color ON OFF OFF ON RGBI Color or COMPAQ Du
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-----------------------------------------------------------------------------Jumper JP3 -----------------------------------------------------------------------------Pins Address Select ----------------1 - 2 3xxh (default) 2 - 3 2xxh ==============================================================================
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Chapter 8.8 Serial/Parallel Interface Board Switch Settings Figures 8-17 and 8-18 show the switch locations on the Serial/Parallel Interface Board. Refer to Tables 8-12 and 8-13 when setting the switches. Table 8-12. Serial/Parallel Interface Board Switch Settings (Assy No.
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OFF ON OFF ON OFF OFF Parallel printer interface LPT2 Parallel printer interface LPT3 Disable parallel printer interface ON ON Asynchronous interface COM1 OFF ON Asynchronous interface COM2 OFF OFF Disable asynchronous interface ============================================================================== Chapter 8.
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1. Remove the outer access casing. procedure. See Chapter 7 in this guide for the 2. Place your COMPAQ PORTABLE II Personal Computer in a standard working position with the outer access casing removed (Figure 8-19). 3. Insert the DIAGNOSTICS diskette in the COMPAQ PORTABLE II Personal Computer and load the DIAGNOSTICS program. (Refer to Chapter 4 in this guide for more information on the COMPAQ PORTABLE II Personal Computer DIAGNOSTICS program.) 4.
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6. Using the label on the high voltage access plate as a guide, locate and adjust the BRITE control until the screen raster appears on the display. Check this display to make sure it is not tilted in any way (Figure 8-21.) NOTE: Do not use excessive force when making adjustments on the video display unit. 7. Turn the brightness control knob until the raster disappears.
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8. Using the VDU adjustment procedure contained in the DIAGNOSTICS program, fill the display screen with a character (refer to Chapter 4 in this guide for more information on the VDU alignment test screen). 9. Using a plastic adjustment tool, turn the WIDTH adjustment potentiometer until the left and right edges of the display screen fall within the range specified on the adjustment template. Width may change between high and low resolution mode and should be adjusted appropriately (Figure 8-22).
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11. If the characters on your display appear too short or too tall, adjust the character height. Using the VDU adjustment DIAGNOSTIC program, fill the screen with capital Es (Figure 8-24). See Chapter 4 in this guide for more information on the VDU adjustment program. 12. Two adjustments control the character height. The first is the master height control potentiometer, which controls the height of characters in both the high and low resolution modes.
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only while the computer is in a high resolution text mode. (Refer to Figure 8-25 for the location of both control potentiometers.) NOTE: Do not use excessive force when making adjustments on the video display unit. 13. Use the CTRL + ALT + < command to place the display in the low resolution graphics mode. Press and hold the CTRL and ALT keys while pressing the less than (<) key. Then release all three keys.
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17. o If the vertical linearity control does not exist on your video display unit, it is preset and controlled by the video display unit. o Step 13 and 14 should be repeated after each adjustment until the character height are equal. If your display is shifted to the right or left, a horizontal display centering adjustment is necessary. Two potentiometers control the centering of the display. One is the master video center potentiometer, which shifts the display in both a high and low resolution mode.