Page 1 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.
Page 2 the right to make changes in its COMPAQ PORTABLE 386 Personal Computer without notice. Accordingly, the diagrams and procedures in this document may not apply to the computer you are servicing. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Only trained technicians should attempt to repair this equipment. troubleshooting and repair procedures are detailed to allow subassembly/module level repair only.
Page 3 Chapter 1. Introduction Chapter 1.1 Summary of Text This guide contains ten chapters which are summarized below: Chapter 1. INTRODUCTION provides a brief summary of the contents of each chapter in the guide, a list of needed tools and supplies, and a list of additional reference documents.
Page 4 Torx Angle T-15 Screwdriver 3/16 Inch Open End Wrench Integrated Circuit (IC) Removal Tool Integrated Circuit (IC) Insertion Tool Modem Terminating Plug DIAGNOSTICS Program Parallel Interface Loopback Plug Serial Interface Loopback Plug Chapter 1.3 Additional Reference Information The following documentation and related software are available to support these and other COMPAQ computer products: COMPAQ PORTABLE 386 PERSONAL COMPUTER OPERATIONS GUIDE (PN 107918-001) COMPAQ PORTABLE 386 PERSONAL COMPUTER TECHNICAL REFERENCE GUIDE...
Page 5 MS-DOS Version 4 Software and Documentation (PN 114493-001 and PN 114496-001) MS-DOS VERSION 3 REFERENCE GUIDE (PN 114024-001) BASIC VERSION 3 REFERENCE GUIDE (PN 104030-001) MICROSOFT Operating System/2 Standard Version 1.1 Service Advisories and Bulletins HOW TO DO BUSINESS WITH COMPAQ SERVICE COMPAQ SERVICE QUICK REFERENCE GUIDE (PN 106854-001)
Page 6 Chapter 2. Operating and Performance Specifications Chapter 2.1 Introduction This chapter provides operating and performance specifications for the COMPAQ PORTABLE 386 Personal Computer (Figure 2-1). Chapter 2.2 System Unit Table 2-1 lists the electrical and mechanical specifications for the COMPAQ PORTABLE 386 Personal Computer system unit.
Page 7 ------------------------------------------------------------------------------ AC Power Cord: Length Gauge ------------------------------------------------------------------------------ Environmental Requirements: Temperature: Operating Nonoperating Shipping ------------------------------------------------------------------------------ Humidity: Operating Nonoperating ------------------------------------------------------------------------------ Shock and Vibrations: Shock Vibration ------------------------------------------------------------------------------ Heat Dissipation: Minimum Configuration Maximum Configuration ------------------------------------------------------------------------------ Maximum Unpressured Altitude: Operating Nonoperating ============================================================================== Chapter 2.3 Portable Enhanced Keyboard Table 2-2 lists the specifications for the portable enhanced keyboard.
Page 8 Table 2-3. COMPAQ Dual Mode Plasma Display Specifications ============================================================================== Viewing Area Dimensions: Height Width Diagonal Weight Graphic Resolution Text Resolution ============================================================================== Chapter 2.5 1.2 Megabyte Diskette Drive Table 2-4 lists specifications for the 1.2 megabyte diskette drive. Table 2-4. 1.2 Megabyte Diskette Drive Specifications ============================================================================== Dimensions: Height...
Page 9 Tracks per Inch Number of Tracks Data Transfer Rate ============================================================================== Chapter 2.7 3 1/2 Inch 1.44 Megabyte Diskette Drive Table 2-6 lists the specifications for the 3 1/2 inch 1.44 megabyte diskette drive. Table 2-6. 3 1/2 Inch 1.44 Megabyte Diskette Drive ============================================================================== Dimensions: Height...
Page 10 Drive Type (used in SETUP program) Media: Number of Surfaces Tracks per Surface Number of Logical Data Heads Number of Logical Cylinders Average Access Time Data Transfer Rate Interleave ============================================================================== Chapter 2.9 100 Megabyte Fixed Disk Drive Table 2-8 lists the specifications for the 100 megabyte fixed disk drive. Table 2-8.
Page 11 Table 2-9 lists the specifications for the 110 megabyte fixed disk drive. Table 2-9. 110 Megabyte Fixed Disk Drive Specifications ============================================================================== Dimensions: Height Depth Width Weight Drive Type (Used in SETUP program) Number of Logical Data Heads Number of Logical Cylinders Average Access Time Data Transfer Rate Sectors per Track...
Page 12 ============================================================================== Dimensions: Height Depth Width Type ------------------------------------------------------------------------------ International modem specifications available locally. ============================================================================== Chapter 2.13 Expansion Unit Table 2-12 lists the specifications for the expansion unit. Table 2-12. Expansion Unit Specifications ============================================================================== Dimensions: Height Depth Width Slots ------------------------------------------------------------------------------ * Fully skirted 8 bit expansion boards will not fit. ============================================================================== Chapter 2.14 40 Megabyte Tape Drive Expansion Unit Table 2-13 lists the specifications for the 40 megabyte tape drive expansion...
Page 13 Table 2-14. Power Supply Specifications ============================================================================== Input Requirements: Line Voltage Line Fuse Line Frequency ------------------------------------------------------------------------------ Power: Steady State Peak State ------------------------------------------------------------------------------ Cooling ------------------------------------------------------------------------------ VDC Output: Nominal Continuous Nominal Current Current Voltage Minimum Maximum ------------------------------------------------------------------------------ +5.0 VDC 3.0A 14.3A +12.0 VDC 1.0A 3.0A -12.0 VDC...
Page 14 Nonoperating ------------------------------------------------------------------------------ Controller ------------------------------------------------------------------------------ External Interface Adapter ------------------------------------------------------------------------------ LED Indicator ------------------------------------------------------------------------------ Power Requirements: Nominal Line Voltage Range Line Voltage Line Frequency ------------------------------------------------------------------------------ Power ------------------------------------------------------------------------------ Current ------------------------------------------------------------------------------ Power Cable: Length Interface ------------------------------------------------------------------------------ Signal Cable: Length Type Connectors ============================================================================== (noncondensing) Not less than 5% or more than 90% (noncondensing) 1:1 interleave buffered ESDI external fixed disk drive controller board installs in one 8/16 bit expansion slot in the system unit.
Page 15 Chapter 3. Power On Self Test (POST)/Problem Isolation Chapter 3.0 Introduction This chapter lists the assemblies checked by the Power On Self Test (POST) and briefly describes the types of error codes that can occur. includes problem isolation procedures and a flowchart for quick reference. Chapter 3.1 POST POST is a series of diagnostic tests that automatically run on the COMPAQ PORTABLE 386 Personal Computer when the system is turned on.
Page 16 printer, remove the loopback plug from the parallel interface and connect the printer instead. Reconnect the AC power cord to a well grounded AC outlet. Insert the latest version of the COMPAQ DIAGNOSTICS diskette into Drive A (Drive Position 1), and push in on the drive button. Turn on the computer.
Page 20 Chapter 4. Setup and Inspect Chapter 4.0 Introduction Please consult the SUPPORT SOFTWARE MAINTENANCE AND SERVICE GUIDE for current information on SETUP and INSPECT.
Page 21 Chapter 5. Diagnostics Program Chapter 5.0 Introduction Please consult the SUPPORT SOFTWARE MAINTENANCE AND SERVICE GUIDE for current information on DIAGNOSTICS.
Page 22 Chapter 6. Error Messages and Codes Chapter 6.1 Introduction This chapter provides Power On Self Test error 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, and the probable failure or action required to resolve the error condition.
Page 23 304 - Keyboard or None System Unit Error ----------------------------------------------------------------------------- 401 - Printer None Interface Error ----------------------------------------------------------------------------- 402 - Monochrome 1 Long, Adapter Error 2 Short ----------------------------------------------------------------------------- 501 - Display 1 Long, Adapter Failure 2 Short ----------------------------------------------------------------------------- 601 - Diskette None Controller Error ------------------------------------------------------------------------------ 701 - Coprocessor...
Page 24 the problem. After completing each step, run the DIAGNOSTICS Program to verify that the error condition has been corrected. reappears, perform the next step, then run the DIAGNOSTICS Program. until the DIAGNOSTICS Program no longer detects an error condition. The error codes are in the form of AYY - XX or AAYY - XX. the faulty subassembly.
Page 25 test failed 102 - 11 Numeric coprocessor speed test failed 102 - 12 Numeric coprocessor pattern test failed 102 - 14 Switch indicates no coprocessor present 102 - 15 Coprocessor is inoperative or socket is unoccupied ------------------------------------------------------------------------------ Error Code Error Description ------------------------------------------------------------------------------ 103 - 01 Direct memory access page...
Page 26 105 - 12 Port 61, bit 2 not at zero. 105 - 13 No interrupt generated by fail safe timer. 105 - 14 NMI not triggered by fail safe timer. 106 - 01 Keyboard controller self test failed. 107 - 01 CMOS RAM test failed.
Page 27 112 - 08 Speed test unable to enter auto mode. 112 - 09 Speed test unable to enter high mode. 112 - 10 Speed test high mode out of range. 112 - 11 Speed test auto mode out of range. 112 - 12 Speed test variable speed mode inoperative.
Page 28 204 - 02 Error during saving program memory in address test. 204 - 03 Error during restore of program memory in address test. 204 - 04 A20 address test failed. ------------------------------------------------------------------------------ Error Code Error Description ------------------------------------------------------------------------------ 204 - 05 Page hit address test failed. 205 - 01 Walking I/O test failed.
Page 29 303 - 01 Keyboard LED test, 8042 self test failed. 303 - 02 Keyboard LED test, retest test failed. 303 - 03 Keyboard LED test, retest failed. 303 - 04 Keyboard LED test, LED command test failed. 303 - 05 Keyboard LED test, LED command test failed.
Page 30 402 - 03 Printer data and control registers failed. 402 - 04 Printer loopback failed. 402 - 05 Printer loopback and data registers failed. 402 - 06 Printer loopback and control registers failed. 402 - 07 Printer loopback, data, and control registers failed.
Page 31 504 - 01 Video character set test failed. 505 - 01 Video 80 x 25 mode 9 x 14 character cell test failed. 506 - 01 Video 80 x 25 mode 8 x 8 character cell test failed. 507 - 01 Video 40 x 25 mode test failed.
Page 32 601 - xx Format Test 601 - 05 Failed to reset controller 601 - 09 Failed to format a track 601 - 23 Failed to set drive type in ID media 602 - xx Diskette Read Test 602 - 01 Exceeded maximum soft error limit 602 - 02...
Page 33 605 - xx Diskette ID Media Test 605 - 20 Failed to get drive type 605 - 24 Failed to read diskette media 605 - 25 Failed to verify diskette media 606 - xx Diskette Speed Test 606 - 26 Failed to read media in speed test 606 - 26...
Page 34 Code Error Description ------------------------------------------------------------------------------ 1101 - xx Asynchronous Communications Interface Test 1101 - 01 UART DLAB bit failed. 1101 - 02 Line input or UART fault. 1101 - 03 Address line fault. 1101 - 04 Data line fault. 1101 - 05 UART control signal failed.
Page 35 Error Code Error Description ------------------------------------------------------------------------------ 1201 - xx Modem Internal Loopback Test 1201 - 01 UART DLAB bit failed. 1201 - 02 Line input or UART failed. 1201 - 03 Address line fault. 1201 - 04 Data line fault. 1201 - 05 UART control signal failed.
Page 36 1203 - 01 Modem external TIP/RING failed. 1203 - 02 Modem external DATA TIP/RING failed. 1203 - 03 Modem line termination failed. ------------------------------------------------------------------------------ Error Code Error Description ------------------------------------------------------------------------------ 1204 - xx Modem Auto Originate Test 1204 - 01 Modem timed out waiting for SYNC.
Page 37 retry limit. 1205 - 04 RCV exceeded carrier lost limit. 1205 - 05 XMIT exceeded carrier lost limit. 1205 - 06 Time out waiting for dial tone. 1205 - 07 Dial number string too long. 1205 - 08 Modem timed out waiting for remote response.
Page 38 1210 - 09 Modem exceeded maximum redial limit. 1210 - 10 Line quality prevented remote connection. 1210 - 11 Modem timed out waiting for remote connection. ============================================================================== Table 6-11. Fixed Disk Drive Error Codes (17xx - xx Range) ============================================================================== Error Code Error Description ------------------------------------------------------------------------------...
Page 39 1701 - 59 Failed to read sector buffer. 1701 - 66 Failed to initialize fixed disk drive parameter. 1702 - xx Fixed Disk Drive Read Test 1702 - 01 Exceeded maximum soft error limit. 1702 - 02 Exceeded maximum hard error limit.
Page 40 soft error limit. 1703 - 04 Previously exceeded maximum hard error limit. 1703 - 05 Failed to reset controller. 1703 - 06 Fatal error while reading. 1703 - 07 Fatal error while writing. 1703 - 08 Failed compare of write/ read buffers.
Page 41 1704 - 06 Fatal error while reading. ------------------------------------------------------------------------------ Error Code Error Description ------------------------------------------------------------------------------ 1704 - 40 Cylinder 0 error. 1704 - 55 Cylinder 1 error. 1704 - 65 Exceeded maximum bad sector per track. 1704 - 70 Failed translate mode. 1704 - 71 Failed nontranslated mode.
Page 42 1708 - 09 Format track bad failed. 1708 - 42 Recalibrate drive failed. 1708 - 43 Failed to format a cylinder bad. 1708 - 58 Failed to write sector buffer. 1708 - 59 Failed to read sector buffer. ------------------------------------------------------------------------------ Error Code Error Description ------------------------------------------------------------------------------...
Page 43 1714 - 10 Failed diskette sector wrap during read. 1714 - 20 Failed to get diskette drive type. 1714 - 24 Failed to read diskette media. 1714 - 25 Failed to verify diskette media. 1714 - 40 Cylinder 0 error. 1714 - 48 Failed to move disk table to RAM.
Page 44 Error Code Error Description ------------------------------------------------------------------------------ 1716 - xx Fixed Disk Drive Conditional Format Test 1716 - 01 Exceeded maximum soft error limit. 1716 - 02 Exceeded maximum hard error limit. 1716 - 05 Failed to reset controller. 1716 - 06 Fatal error while reading.
Page 45 1717 - xx Fixed Disk Drive ECC Test 1717 - 01 Exceeded maximum soft error limit. 1717 - 02 Exceeded maximum hard error limit. ------------------------------------------------------------------------------ Error Code Error Description ------------------------------------------------------------------------------ 1717 - 03 Previously exceeded maximum soft error limit. 1717 - 04 Previously exceeded maximum hard error limit.
Page 46 Error Code Error Description ------------------------------------------------------------------------------ 1900 - xx Tape Test 1900 - 01 Tape not installed. 1900 - 02 Drive installed in other drive 3. 1900 - 26 Cannot identify drive. 1900 - 27 Drive not compatible with controller. 1900 - 92 Tape drive mismatched.
Page 47 1902 - 01 Drive not installed. 1902 - 02 Cartridge not installed. 1902 - 03 Tape motion error. 1902 - 04 Drive busy error. 1902 - 05 Track seek error. ------------------------------------------------------------------------------ Error Code Error Description ------------------------------------------------------------------------------ 1902 - 06 Tape write protected error. 1902 - 09 Unable to format.
Page 48 1904 - 04 Drive busy error. 1904 - 05 Track seek error. 1904 - 15 Sense error flag. 1904 - 27 Drive not compatible with controller. 1905 - xx Tape Read Test 1905 - 01 Drive not installed. 1905 - 02 Cartridge not installed.
Page 49 1906 - 06 Tape write protected error. 1906 - 14 Drive timeout error. 1906 - 16 Block locate (block ID) error. 1906 - 17 Soft error limit exceeded. 1906 - 18 Hard error limit exceeded. 1906 - 19 Write (probably ID error). 1906 - 20 765 Fatal error.
Page 50 2414 - 01 Video White Screen Test 2416 - 01 Video Noise Pattern Test ------------------------------------------------------------------------------ Error Code Error Description ------------------------------------------------------------------------------ 2417 - 01 Lightpen text mode test failed; no response. 2417 - 02 Lightpen text mode test failed; invalid response. 2417 - 03 Lightpen medium resolution mode test failed;...
Page 51 5103 - 01 Video Attribute Test 5104 - 01 Video Character Set Test 5105 - 01 Video 80 x 25 Mode 9 x 14 Character Cell Test 5106 - 01 Video 80 x 25 Mode 8 x 8 Character Cell Test 5107 - 01 Video 40 x 25 Mode Test 5108 - 01...
Page 52 Defective Memory Isolation Memory error codes are shown on the display in an 8 digit format (XX000Y ZZ). The XX and Y alphanumeric codes are the key identification points for defective memory isolation. Personal Computer, the remaining codes in the format are not required for determining memory locations.
Page 55 Chapter 7. Illustrated Parts Catalog Chapter 7.1 Introduction This chapter provides a spare parts reference for the COMPAQ PORTABLE 386 Personal Computer. The information in each section is presented in tabular form. contains the following columns: Description - name of the particular part or parts kit. Part Number - to be used when ordering parts from Compaq Computer Corporation.
Page 56 Table 7-1. Display Enclosure Assembly ============================================================================== Item Description ------------------------------------------------------------------------------ COMPAQ Dual Mode Plasma Display Display Filter Assembly Display Enclosure Keyboard Connector Cover * Brightness Control Assembly Brightness Control Knob * Display Bezel Latch * Ground Plate Plasma Display Hinge * Display Power Cable Assembly ** Strain Relief Bracket * Display Data Cable Assembly **...
Page 57 Mandrel * ------------------------------------------------------------------------------ Included in the Miscellaneous Hardware Kit (PN 107386-001). Included in the Cable Kit (PN 107382-001). ============================================================================== Chapter 7.3 Portable Enhanced Keyboard Assembly Table 7-2 lists the keyboard assembly for the COMPAQ PORTABLE 386 Personal Computer, which is illustrated in Figure 7-3. Table 7-2.
Page 58 Table 7-3 lists the spare parts for the COMPAQ PORTABLE 386 Personal Computer chassis rear assembly. Items numbered 1 through 14 are illustrated in Figure 7-4, and items numbered 15 through 34 are illustrated in Figure 7-5. Table 7-3. Chassis - Rear Assembly ============================================================================== Item Description...
Page 59 Power Supply Ground Subassembly Battery System Board Microprocessor Cover System Board Cover Rear Panel AC Power Cord Interface Connector Cover 32 Bit Memory/Modem Interface Board System ROMs RGB Data Cable ** Options Compartment Shield Front Main Bezel Strain Relief Clip * Handle Assembly ------------------------------------------------------------------------------ Item...
Page 60 1 to 2 Megabyte Memory Expansion Board Display Data Cable Assembly ** LED/Speaker Cable Keyboard Cable (Internal) ------------------------------------------------------------------------------ Included in the Miscellaneous Hardware Kit (PN 107386-001). Included in the Cable Kit (PN 107382-001). ============================================================================== Chapter 7.5 Chassis - Side Assembly Table 7-4 lists the spare parts for the COMPAQ PORTABLE 386 Personal Computer chassis side assembly, which is illustrated in Figure 7-6.
Page 61 Mass Storage Device Enclosure Fixed Disk Drive Data Cable ** Fixed Disk Drive Power Cable ** 40 Megabyte Fixed Disk Drive (3:1) 40 Megabyte Fixed Disk Drive (1:1 Drive Type 17) 40 Megabyte Fixed Disk Drive (1:1 Drive Type 43) 100 Megabyte Fixed Disk Drive 110 Megabyte Fixed Disk Drive Drive Bracket Assembly...
Page 66 Table 7-5. Spare Parts for Options ============================================================================== Description ------------------------------------------------------------------------------ 32 Bit Memory/Modem Interface Board 1 to 2 Megabyte Memory Expansion Board 512 Kbyte Memory Module Part Number 107684-001 107686-001 107687-001...
Page 67 4 Megabyte Memory Expansion Board 4 Megabyte Memory Extension Board COMPAQ 1200 Baud Internal Modem COMPAQ 2400 Baud Internal Modem Second Serial Interface Board (International) Expansion Unit (complete) Tape Drive Expansion Unit Tape Cartridge (40 Megabyte) Video Graphics Controller Board Video Graphics Color Monitor Video Graphics Monochrome Monitor Intel 80387 (20 MHz) Coprocessor...
Page 68 Table 7-6 lists the spare parts in the cable kit (PN 107382-001) for the COMPAQ PORTABLE 386 and COMPAQ PORTABLE III Personal Computers. Table 7-6. Cable Kit ============================================================================== Description ------------------------------------------------------------------------------ Diskette Drive Data Cable Diskette Drive Power Cable Fixed Disk Drive Data Cable (COMPAQ PORTABLE III) Fixed Disk Drive Power Cable (COMPAQ PORTABLE III) Display Data Cable Assembly Display Power Cable Assembly...
Page 69 Chapter 8. Removal and Replacement Procedures Chapter 8.1 Introduction Before starting the removal procedures, review Chapter 7, "Illustrated Parts Catalog," to become familiar with the various part numbers and locations. After completing all removal and replacement procedures, run the DIAGNOSTICS Program on the COMPAQ PORTABLE 386 Personal Computer to verify the proper operation of the replaced component.
Page 70 Complete the preparation procedure (see Section 8.2). Detach the keyboard from the system unit. Grasp the keyboard cord near where it connects to the computer. pull it away from the keyboard connector on the computer (Figure 8-2). Slide the keyboard connector cover off of the keyboard cord and set it aside (Figure 8-3).
Page 71 To replace the keyboard assembly, reverse steps 1 through 4. Chapter 8.4 Rear Panel To remove the rear panel: Complete the preparation procedure (see Section 8.2). Place the computer keyboard side down on a level surface with the rear panel facing upward. Remove the six screws and washers that secure the rear panel to the computer (Figure 8-4).
Page 72 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Do not overtighten the screws. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Chapter 8.5 Interface Connector Cover The interface connector cover protects the 32 bit memory/modem interface connector when nothing is installed in the options compartment. must be removed before either modem, the second serial interface board, or any of the memory expansion boards can be installed.
Page 73 aside (Figure 8-6). To replace the interface connector cover, reverse steps 1 through 5. Chapter 8.6 Microprocessor Cover To remove the microprocessor cover: Complete the preparation procedure (see Section 8.2). Remove the rear panel (see Section 8.4). Locate the microprocessor cover shown in Figure 8-7.
Page 74 Grasp the microprocessor cover at its edges; gently lift it up and away from the system board and set it aside (Figure 8-8). To replace the microprocessor cover, reverse steps 1 through 4. NOTE: Position the cover so that the edges slanted in go inside the fence and those slanted out go outside the fence.
Page 75 Chapter 8.7 System Board Cover To remove the system board cover: Complete the preparation procedure (see Section 8.2). Remove the rear panel (see Section 8.4). Remove the interface connector cover, if installed (see Section 8.5). Remove the 32 bit memory/modem interface board, if installed (see Section 8.8).
Page 76 Chapter 8.8 32 Bit Memory/Modem Interface Board The 32 bit memory/modem interface board connects the memory expansion boards, either internal modem, and the second serial interface board to the system board. If one or a combination of these options is installed, the 32 bit memory/modem interface board will also be in place.
Page 77 Remove the screws securing the 32 bit memory/modem interface board and set them aside. Grasp the 32 bit memory/modem interface board at its edges and, without rocking it, lift it straight up and away from the computer (Figure 8-12). When the 32 bit memory/modem interface board is removed, the options compartment with its two expansion slots is revealed (Figure 8-13).
Page 78 The top slot holds the second serial interface board or one of the internal modems. Both the COMPAQ 1200 Baud Internal Modem and the COMPAQ 2400 Baud Internal Modem, are approved for use with the COMPAQ PORTABLE 386 Personal Computer. The second slot allows memory expansion using any of three different memory expansion board combinations (see Section 8.8).
Page 79 Locate the internal modem and modem ground bracket shown in Figure 8-15. Remove the one screw that secures the modem ground bracket to the system board (Figure 8-16).
Page 80 Remove the modem bezel (Figure 8-17). Slide the internal modem out of the options compartment and set it aside (Figure 8-18).
Page 81 To replace the internal modem option, reverse steps 1 through 8. Chapter 8.10 Second Serial Interface Board (International Only) To remove the second serial interface board: Complete the preparation procedure (see Section 8.2). Remove the rear panel (see Section 8.4). Remove the 32 bit memory/modem interface board (see Section 8.8).
Page 82 Locate the second serial interface board shown in Figure 8-20. Slide the second serial interface board out of the options compartment and set it aside (Figure 8-21).
Page 83 To replace the second serial interface board, reverse steps 1 through 6. Chapter 8.11 Memory Expansion Boards Three memory expansion boards are available for the COMPAQ PORTABLE 386 Personal Computer: 1 to 2 Megabyte Memory Expansion Board, which comes standard with four sockets and one megabyte of random access memory (RAM).
Page 84 To remove a memory expansion board: Complete the preparation procedure (see Section 8.2). Remove the rear panel (see Section 8.4). Remove the 32 bit memory/modem interface board (see Section 8.8). Press the top tab and disconnect the LED/speaker and keyboard cables from the system board (Figure 8-22).
Page 85 Locate the memory expansion board shown in Figure 8-23. Slide the memory expansion board out of the options compartment and set it aside (Figure 8-24).
Page 86 To replace the memory expansion board, reverse steps 1 through 6. Chapter 8.12 Memory Upgrade Kit Each 1 megabyte memory upgrade kit consists of two 512 Kbyte memory modules, which are surface mounted with four 256K x 4, 80 ns RAM chips and two 256K x 1, 80 ns RAM chips.
Page 87 To release the module, insert a tool, such as a ball point pen, into the hole at one end of the module. Grasp the end of the module, pull up, and "peel" it away from its socket (Figure 8-26). To replace the memory module, simply reinsert it into its socket, then reverse steps 1 through 3.
Page 88 Complete the preparation procedure (see Section 8.2). Remove the rear panel (see Section 8.4). Remove the 32 bit memory/modem interface board (see Section 8.8). Remove the 1 to 2 megabyte memory expansion board (see Section 8.11). Locate the memory module that is to be replaced (Figure 8-27). To release the module, insert a tool, such as a ball point pen, into the hole at one end of the module.
Page 89 To replace the memory module, simply reinsert it fully into its socket, then reverse steps 1 through 5. Chapter 8.13 System ROM To remove the system ROM: >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< The ROMs are sensitive to static electricity and are shipped on conductive foam to protect them from accidental electrostatic discharge.
Page 90 Using an IC removal tool, remove the system ROM (Figure 8-30). Using an IC insertion tool, insert the new ROM into the appropriate sockets (Figure 8-31).
Page 91 Chapter 8.14 System Board NOTE: The system board and the base pan are one assembly and are removed simultaneously. To remove the system board assembly: Complete the preparation procedure (see Section 8.2). Remove the rear panel (see Section 8.4). Remove the interface connector cover, if installed (see Section 8.5). Remove the 32 bit memory/modem interface board, if installed (see Section 8.8).
Page 92 Fixed disk drive power cable LED/speaker cable Keyboard cable Display controller board data cable Battery cable Remove the screws that secure the system board assembly to the main enclosure (Figure 8-33). NOTE: Use a 3/16 inch wrench to remove the standoffs and a Torx screwdriver to remove the screws.
Page 93 Grasp the system board assembly by its edges. the main enclosure. Disconnect the RGBI cable assembly from the plasma display controller board (Figure 8-34). To replace the system board, reverse steps 1 through 13. Lift it up and away from...
Page 94 Chapter 8.15 Plasma Display Controller Board To remove the plasma display controller board: Complete the preparation procedure (see Section 8.2). Remove the rear panel (see Section 8.4). Remove the interface connector cover, if installed (see Section 8.5). Remove the 32 bit memory/modem interface board, if installed (see Section 8.8).
Page 95 NOTE: Removing the controller board from its compartment also disconnects it from the display data cable. Disconnect the display controller board data cable from the controller board (Figure 8-37). To replace the controller board, reverse steps 1 through 13.
Page 96 Chapter 8.16 Mass Storage Device Assembly To remove the mass storage device subassembly: Complete the preparation procedure (see Section 8.2). Remove the rear panel (see Section 8.4). To remove the drive bezel, place your thumb on the rear side of the drive bezel.
Page 97 Locate the mass storage device subassembly shown in Figure 8-40. Remove the screw that secures the mass storage device subassembly to the mass storage device enclosure (Figure 8-41).
Page 98 Slide the mass storage device subassembly out of the mass storage device enclosure (Figure 8-42). >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< When removing the mass storage device subassembly, be sure that the cables do not interfere with the mass storage device enclosure. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< CAUTION...
Page 99 To replace the mass storage device subassembly, reverse steps 7 and 8. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< When replacing the mass storage device subassembly, be sure that the cables do not interfere with the mass storage device enclosure. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Reconnect the cables, listed in step 5, to the system board. To replace the bezel and rear panel, reverse steps 1 through 4.
Page 100 Remove the two screws that secure the drive cover or metal plate covering the front of Drive Position 2 (Figure 8-45).
Page 101 Remove the four screws from the mass storage device subassembly and slide the fixed disk drive assembly out of the mass storage device subassembly (Figure 8-46). To replace the fixed disk drive, reverse steps 1 through 7. Chapter 8.18 Diskette Drive...
Page 102 To remove the diskette drive assembly: Complete the preparation procedure (see Section 8.2). Remove the rear panel (see Section 8.4). Remove the mass storage device subassembly (see Section 8.12). Locate the diskette drive shown in Figure 8-47. Disconnect the diskette drive power and signal cables from the diskette drive (Figure 8-48).
Page 103 Remove the four shoulder bolts from the mass storage device subassembly and slide the diskette drive assembly out of the mass storage device subassembly (Figure 8-49). NOTE: When removing the diskette drive, do not misplace the four vibration isolators shown in Figure 8-49. to replace the diskette drive assembly.
Page 104 Chapter 8.19 Power Supply To remove the power supply: Complete the preparation procedure (see Section 8.2). Remove the rear panel (see Section 8.4). Remove the interface connector cover, if installed (see Section 8.5). Remove the 32 bit memory/modem interface board, if installed (see Section 8.8).
Page 105 Disconnect the plasma display data cable and the plasma display power cable ground wire from the power supply (Figure 8-52). Place the computer in an upright position. Place the plasma display at an outward angle and remove the top two screws and washers with an angle Torx screwdriver (Figure 8-53).
Page 106 Lift the plasma display into an upright position and remove the bottom two screws and washers with a Torx screw driver (Figure 8-54). Carefully slide the power supply out of the computer chassis (Figure 8-55).
Page 107 To replace the power supply, reverse steps 1 through 14. Chapter 8.20 Mass Storage Device Enclosure To remove the mass storage device enclosure: Complete the preparation procedure (see Section 8.2). Remove the rear panel (see Section 8.4). Remove the interface connector cover, if installed (see Section 8.5). Remove the 32 bit memory/modem interface board, if installed (see Section 8.8).
Page 108 Lift the plasma display into an upright position and remove the bottom two screws and washers from the mass storage device enclosure with a Torx screwdriver (Figure 8-57). Carefully slide the mass storage device enclosure out of the computer chassis (Figure 8-58).
Page 109 To replace the mass storage device enclosure, reverse steps 1 through 10. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Be sure the LED/speaker and keyboard cables are not pinched or exposed when replacing the mass storage devices enclosure. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Chapter 8.21 LED/Speaker Cable, Keyboard Cable, and LED Assembly To remove the LED/speaker cable, keyboard cable, and LED assembly: Complete the preparation procedure (see Section 8.2).
Page 110 Remove the two screws that secure the keyboard cable connector to the keyboard ground strap and computer chassis (Figure 8-60). Locate the LED/speaker and keyboard cables shown in Figure 8-61.
Page 111 Disconnect the LED connector from the LED assembly (Figure 8-62). careful not to bend the pins on the LED assembly connector. Disconnect the speaker from the rail (Figure 8-63). >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<...
Page 112 When removing the speaker, do not touch the silver speaker surface. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Slide the speaker and the LED connector through the slot in the options compartment (Figure 8-64). CAUTION...
Page 113 Disconnect the keyboard cable extension from the keyboard cable. Remove the LED/speaker cable and keyboard cable from the options compartment (Figure 8-65). Remove the eight screws that secure the front main bezel to the main housing enclosure (Figure 8-66).
Page 114 Push the LED assembly forward and snap it out (Figure 8-67). Slide the LED lens out of the computer chassis (Figure 8-68).
Page 115 To replace the LED assembly and the LED/speaker and keyboard cables, reverse steps 1 through 17. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< When replacing the speaker, do not touch the silver speaker surface. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Chapter 8.22 Plasma Display To remove the Plasma Display: Complete the preparation procedure (see Section 8.2). Unlatch the display enclosure by pressing down on the two latches on top of the display enclosure.
Page 116 While holding the display bezel in place with one hand, remove the four screws that secure the display bezel to the display enclosure. screws are located on the back of the display enclosure (Figure 8-70). Alter removing the four screws, lift the display bezel away from the front of the display enclosure.
Page 117 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Grasp the display by its metal frame and do not touch the display panel. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Remove the two latches from the display enclosure and set them aside (Figure 8-72). NOTE: For future replacement, notice how the latches are positioned. CAUTION...
Page 118 Locate the plasma display shown in Figure 8-73. Remove the four screws and washers that secure the plasma display to the display enclosure (Figure 8-74).
Page 119 NOTE: The ground plate comes loose and may hang from the ground wires when the plasma display is removed. Lift the plasma display away from the display ground bracket and tilt it forward to expose the cables. Disconnect the ground plate from the ground wires and remove the grounding foil.
Page 120 Disconnect the display power cable ground wires from the plasma display (Figure 8-76). To replace the plasma display, reverse steps 1 through 11. display bezel, replace the brightness control knob. NOTE: If cleaning is required, use isopropyl alcohol. As you replace the...
Page 121 Chapter 8.23 Plasma Display Filter To remove the plasma display filter: Complete the preparation procedure (see Section 8.2). Complete steps 2 through 4 of Section 8.22. Remove the filter by lifting it up and out of the plasma display enclosure as shown in Figure 8-77. To replace the plasma display filter, reverse steps 1 through 3.
Page 122 Push the lower legs of the brightness control assembly upward, and snap the assembly out (Figure 8-79). To replace the brightness control assembly, reverse steps 1 through 4. Chapter 8.25 Display Enclosure To remove the display enclosure:...
Page 123 Complete the preparation procedure (see Section 8.2). Remove the plasma display (see Section 8.22). Remove the two screws that secure the strain relief clip to the display enclosure (Figure 8-80). Remove the display power cable and the display data cable from the strain relief clip (Figure 8-81).
Page 124 Observe that the display enclosure is attached to the main enclosure by two mandrels and two plasma display hinges (Figure 8-82). Remove the one screw that secures each mandrel to the display enclosure (Figure 8-83).
Page 125 Remove each mandrel from the display enclosure by pushing the mandrel toward the plasma display and lifting it out (Figure 8-84). Remove the four screws that secure the display enclosure to the plasma display hinges (Figure 8-85). NOTE: Removing the two screws from the left side of the display enclosure (as...
Page 126 you face the display enclosure) will also remove the display ground (Figure 8-85). Lift the display enclosure away from the main enclosure, being careful to guide the display power cable and display data cable through the slot in the display enclosure (Figure 8-86). Notice that the rollers are still located in the grooves (Figure 8-87).
Page 127 Remove the rollers from the grooves, place them on the mandrels, and set them aside. To replace the display enclosure: Guide the display cable assembly back through the slot in the main enclosure. With the display enclosure in the down position, guide each roller and mandrel back into position and replace the screw.
Page 128 Complete the preparation procedure (see Section 8.2). Remove the rear panel (see Section 8.4). Remove the 32 bit memory/modem interface board, if installed (see Section 8.5). Remove the system board (see Section 8.10). Remove the plasma display controller board (see Section 8.11). Remove the plasma display (see Section 8.18).
Page 129 Disconnect the display data cable and display power cable ground wires from the power supply (Figure 8-90). Remove the screw that secures the strain relief bracket to the main enclosure (Figure 8-91).
Page 130 Remove the display data cable connector from the plasma display controller board compartment (Figure 8-92). Guide the display power cable assembly and the display data cable assembly through the opening in the main enclosure wall (Figure 8-93).
Page 131 NOTE: For future replacement, notice the proper orientation of the display power cable assembly and the display data cable assembly. To replace the display data cable assembly, reverse steps 1 through 13. Chapter 8.27 Handle and Spreader Plate To remove the handle and spreader plate: Complete the preparation procedure (see Section 8.2).
Page 132 Remove the four screws that secure the plasma display hinges to the main enclosure (Figure 8-95). Locate the handle and spreader plate shown in Figure 8-96.
Page 133 Remove the two screws that secure the handle and spreader plate to the computer chassis. Remove the handle and spreader plate (Figure 8-97). To replace the handle and spreader plate, reverse steps 1 through 12. Chapter 8.28 Battery >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<...
Page 134 This computer contains a lithium battery that may explode if mistreated. not abuse, disassemble, or dispose of in fire. Use only replacement batteries supplied by Compaq Computer Corporation (PN 107786-001) Disposal of the lithium battery should be accomplished within compliance of local regulations or returned to Compaq Computer Corporation by established parts return methods.
Page 135 To replace the battery, reverse steps 1 through 7. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Use caution when replacing the lithium battery. battery is supplied by Compaq Computer Corporation and identified by PN 107786-001. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< NOTE: UPS will not airship (UPS blue label) lithium batteries. Chapter 8.29 Expansion Unit To remove the expansion unit from the computer: Complete the preparation procedure (see Section 8.2).
Page 136 Place the computer, keyboard side down, on a level surface with the rear panel facing up and the handle facing away from you. Pull out on the locking bar that secures the expansion unit to the computer chassis (Figure 8-101). Grasp the expansion unit on each side.
Page 137 Pull the expansion unit up and away from the computer (Figure 8-102). Insert a flat blade screwdriver in each of the four notches on the expansion unit and gently pop up the expansion unit cover (Figure 8-103). Remove the expansion unit cover (Figure 8-104).
Page 138 Remove the retaining screw that secures each optional expansion board to the expansion unit. Gently lift the board(s) up and out of its connector on the circuit board (Figure 8-105). To replace the expansion unit, reverse steps 1 through 9. Chapter 8.30 300/600 Megabyte Fixed Disk Drive Expansion Unit...
Page 139 Preparation Procedures Before beginning the removal and replacement procedures, complete the following steps. Turn off the computer. Turn off the 300/600 Megabyte Fixed Disk Drive Expansion Unit (hereafter referred to as the fixed disk drive expansion unit). Disconnect all power to the computer and the fixed disk drive expansion unit.
Page 140 Disconnect the 20 pin and 34 pin signal cables from the external interface adapter board in the fixed disk drive expansion unit (Figure 8-107). Disconnect the universal drive power cable from the external interface adapter board in the fixed disk drive expansion unit (Figure 8-108). Remove the three retaining screws securing the fixed disk drive to the fixed disk drive expansion unit (Figure 8-109).
Page 141 Carefully slide the fixed disk drive out of the fixed disk drive expansion unit housing. NOTE: A terminating resistor must be installed on a 300 megabyte fixed disk drive if: o The fixed disk drive is in a 300 Megabyte Fixed Disk Drive Expansion Unit. o The fixed disk drive is the secondary drive in a 600 Megabyte Fixed Disk Drive Expansion Unit.
Page 142 NOTE: Terminating resistors are located in different positions on the drive depending on the manufacturer. To replace the fixed disk drive in the fixed disk drive expansion unit, reverse steps 1 through 5. Power Supply To remove the power supply from the fixed disk drive expansion unit, complete the following steps.
Page 143 Slide the power supply assembly 1/2 inch to 1 inch (1.27 to 2.54 cm) toward the fixed disk drive housing (Figure 8-112). tabs on the bottom chassis. place. Shift the power supply assembly away from the external adapter board to access the connector on the board.
Page 144 To replace the power supply assembly, reverse steps 1 through 5. External Interface Adapter Board To remove the external interface adapter board from the fixed disk drive expansion unit, complete the following steps: Complete the preparation procedures at the beginning of Section 8.30. Disconnect the 20 pin and 34 pin signal cables from the external interface adapter board (Figure 8-113).
Page 145 Disconnect the universal drive power and power supply cables from the external interface adapter board (Figure 8-114). Remove the external interface adapter board. NOTE: Inspect the new external interface adapter board for shipping damage before installing.
Page 146 To replace the external interface adapter board, reverse steps 1 through 4. NOTE: For internal and external switch settings for the 300/600 Megabyte Fixed Disk Drive Expansion Unit, refer to Chapter 9, "Jumper and Switch Settings."...
Page 147 Chapter 9. Jumper and Switch Settings Chapter 9.1 Introduction This chapter provides jumper and switch settings for the COMPAQ PORTABLE 386 Personal Computer. remember that the default settings shown are set for the system as configured by Compaq Computer Corporation. the system configuration is changed.
Page 148 NOTE: The following jumper settings are reserved: E12, Pins 1 and 2 E18, Pins 2 and 3 E22, Pins 2 and 3 E24, Pins 1 and 2 E25, Pins 1 and 2 Figure 9-1 shows the jumper locations on the COMPAQ PORTABLE 386 system board. Chapter 9.3 System Board Jumper Settings Refer to Figure 9-1 for the system board jumper locations.
Page 149 E7, Pins 1 and 2 Select primary E7, Pins 2 and 3 Select alternate interrupt (IRQ5) ============================================================================== Table 9-2. Jumpers E3, E4, E8, and E9 - Select Serial Communications Interface Options ============================================================================== Jumper Setting Function ------------------------------------------------------------------------------ E3, Pins 2 and 3 Select serial interface as COM1 (3FX, IRQ4), and modem E4, Pins 1 and 2 or second serial interface as COM2 (2FX, IRQ3) (default)
Page 150 Table 9-3. Jumpers E5 and E6 - Select Drive Options ============================================================================== Jumper Setting Function ------------------------------------------------------------------------------ E5, Pins 1 and 2 Enables fixed disk drive (default). E5, Pins 2 and 3 Disables fixed disk drive. E6, Pins 2 and 3 Selects primary drive addresses (1FX, 3FX) (default). E6, Pins 1 and 2 Selects secondary drive addresses (17X, 37X) ==============================================================================...
Page 151 ------------------------------------------------------------------------------ E19, Pins 1 and 2 Fail safe timer enabled (default). E19, Pins 2 and 3 Fail safe timer disabled. ============================================================================== Table 9-7. Jumper E20 - Selects 20 MHz 80387 Coprocessor Installation ============================================================================== Jumper Setting Function ------------------------------------------------------------------------------ E20, Pins 2 and 3 Selects 20 MHz 80387 coprocessor not installed or Weitek 3167 coprocessor installed (default).
Page 152 Use care when setting the configuration switches on the COMPAQ Enhanced Color Graphics Board. Many of the components on the board are sensitive to static electricity. Be sure that you are discharged of static electricity by briefly touching a metal object. Also, the correct setting of the configuration switches is vital to the operation of the COMPAQ Enhanced Color Graphics Board.
Page 153 Configuration Switch Bank SW1 How the COMPAQ Enhanced Color Graphics Board is to be used determines the setting for configuration switch bank SW1. the only or primary display controller board (the one active at power on or reboot) or secondary display controller board. Refer to Figure 9-2 or 9-3 for the location of configuration switch bank SW1.
Page 154 ------------------------------------------------------------------------------ COMPAQ Color Monitor 80 x 25 or Compatible Enhanced (640 x 200 Color Monitor or COMPAQ resolution) Dual Mode Monitor or RGB Color Monitor ------------------------------------------------------------------------------ COMPAQ Color Monitor 40 x 25 or Compatible Enhanced (320 x 200 Color Monitor or COMPAQ resolution) Dual Mode Monitor or RGB Color Monitor...
Page 155 ------------------------------------------------------------------------------ COMPAQ Dual Mode 80 x 25 Monitor (720 x 350 resolution) ------------------------------------------------------------------------------ COMPAQ Dual Mode 80 x 25 Monitor (720 x 350 resolution ============================================================================== Configuration Switch Bank SW2 The monitor type used with the COMPAQ Enhanced Color Graphics Board determines the settings for configuration switch bank SW2.
Page 156 Jumper JP3 Jumper JP3 is shown in both Figures 9-2 and 9-3. correct setting for Jumper JP3. Table 9-13. Jumper P1 - Selects Monitor Type ============================================================================== Jumper Setting Function ------------------------------------------------------------------------------ P1, Pins 1 and 2 Selects a COMPAQ Color Monitor or compatible enhanced color monitor (default).
Page 157 Switch Function ------------------------------------------------------------------------------ Reserved - Always OFF ------------------------------------------------------------------------------ Serial Port Enable/Disable 2 = ON 2 = OFF ------------------------------------------------------------------------------ 3, 4 Parallel Port Select/Disable 3 = ON 3 = OFF 3 = ON 3 = OFF ------------------------------------------------------------------------------ 5, 6 Serial Port Select 5 = ON 5 = OFF ------------------------------------------------------------------------------...
Page 158 ------------------------------------------------------------------------------ Video RAM 1-2 8 bit 2-3 16 bit (default) ------------------------------------------------------------------------------ Video ROM 1-2 8 bit (default) 2-3 16 bit ==============================================================================...
Page 159 Chapter 9.7 ESDI External Fixed Disk Drive Controller Board Switch settings for the 1:1 Interleave Buffered ESDI External Fixed Disk Drive Controller Board are listed in Table 9-17. Table 9-17. 1:1 Interleave Buffered ESDI External Fixed Disk Drive Controller Board (Assy No. 001091) ============================================================================== Switch Setting...
Page 160 Chapter 10. Mass Storage Configurations Chapter 10.1 Introduction The 300/600 Megabyte Fixed Disk Drive Expansion Unit (hereafter referred to as the fixed disk drive expansion unit) can be used with the COMPAQ PORTABLE 386 Personal Computer with system ROM revision K.0P or later. fixed disk drive expansion unit can be used as a normal external fixed disk drive for maximum storage or in a mirroring or duplexing mode.
Page 161 To use MS-DOS and the device driver with two fixed disk drives and one fixed disk drive expansion unit: A maximum of two controllers can be plugged into the system bus. Each controller can support only two fixed disk drives. Example: With the use of two fixed disk drive expansion units, a total of 1.2 gigabytes of fixed disk drive storage is available, divided into four...
Page 162 Duplexing IMPORTANT: Novell NetWare software must be used when setting up the system for the duplexing function to work. Compaq Computer Corporation also supports duplexing configuration using two fixed disk drive expansion units, each equipped with two 300 megabyte fixed disk drives.
Page 163 Chapter 10.3 Setting Up the Fixed Disk Drive Expansion Unit The EXTDISK.SYS Device Driver If you are running the fixed disk drive expansion unit at the secondary address, you must install the EXTDISK.SYS device driver in the CONFIG.SYS file. However, if you are running the fixed disk drive expansion unit at the primary address, you do not need to use the EXTDISK.SYS device driver.
Page 164 If the fixed disk drive expansion unit is configured at the primary address, that fixed disk drive must contain a primary DOS partition. partition is created with the menu driven FDISK utility which contains an extended partition. The total number or logical drives on your system may not exceed 24.
Page 165 one of a mirrored or duplexed pair of drives. effect on the disk driver that is in use. change from one driver to another. While the disks are UNMIRRORED, only the primary fixed disk drive of the mirrored pair will be read from and written to. reenables fixed disk drive mirroring and copies all changed data on the primary fixed disk drive of the mirrored pair to the secondary fixed disk drive.
Page 166 COMP21.BAT Batch file to run patch COMP21.DOC Documentation for patch PATCH.EXE Main patch program If you applied any patches, place the patched files on the working copies of the appropriate NetWare diskettes. and link the NetWare operating system and utilities. Run COMPSURF to perform a surface analysis on the server fixed disk drives.

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