Compaq PORTABLE 386

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10. Disconnect the display data cable and display power cable ground wires

from the power supply (Figure 8-90).

11. Remove the screw that secures the strain relief bracket to the main

enclosure (Figure 8-91).

Main Page

Summary of Text3
Required Tools and Supplies3
Additional Reference Information4
Operating and Performance Specifications6
System Unit6
Electrical and Mechanical Specifications6
Portable Enhanced Keyboard7
Compaq Dual Mode Plasma Display7
Megabyte Diskette Drive8
360 Kbyte Diskette Drive8
3 1/2 Inch 1.44 Megabyte Diskette Drive9
40 Megabyte Fixed Disk Drive9
100 Megabyte Fixed Disk Drive10
110 Megabyte Fixed Disk Drive10
Compaq 1200 Baud Internal Modem11
Compaq 2400 Baud Internal Modem11
Expansion Unit12
40 Megabyte Tape Drive Expansion Unit12
Power Supply12
300/600 Megabyte Fixed Disk Drive Expansion Unit13
Power on Self Test (Post)/Problem Isolation15
Preliminary Steps to Problem Isolation15
Problem Isolation Flowchart16
Setup and Inspect20
Diagnostics Program21
Error Messages and Codes22
Power on Self Test Messages22
Diagnostic Error Codes23
Central Processing Unit Error Codes (1Xx - XX Range)24
Memory Error Codes (2Xx - XX Range)27
Keyboard Error Codes (3Xx - XX Range)28
Parallel Printer Error Codes (4Xx - XX Range)29
Video Error Codes (5Xx - XX Range) (for External Video Display)30
Diskette Drive Error Codes (6Xx - XX Range)31
Monochrome Video Board Error Codes (8Xx - XX Range)33
Serial Communications Error Codes (11Xx - XX Range)33
Modem Communications Error Codes (12Xx - XX Range)34
Fixed Disk Drive Error Codes (17Xx - XX Range)38
Tape Drive Error Codes (19Xx - XX Range)45
COMPAQ Video Graphics Error Codes (24Xx - XX Range)49
COMPAQ Dual Mode Plasma Display Error Codes (51Xx - XX Range)50
Memory Error Codes51
Defective Memory Isolation52
Memory Locations52
Compaq Portable 386 Personal Computer System Board Memory Error Map53
1 To 2 Megabyte Memory Expansion Board Error Map53
4 Megabyte Memory Expansion Board Error Map54
Illustrated Parts Catalog55
Display Enclosure Assembly55
Portable Enhanced Keyboard Assembly57
Chassis - Rear Assembly57
Chassis - Side Assembly60
Spare Parts for Options61
Optional 32 Bit Memory/Modem Interface Board View62
Optional 1 to 2 Megabyte Memory Expansion Board62
Optional 512 Kbyte Memory Module View63
Optional 4 Megabyte Memory Expansion Board View63
Optional 4 Megabyte Memory Extension Board View64
Optional Compaq 1200 Baud Internal Modem View64
Optional Compaq 2400 Baud Internal Modem View65
Optional Second Serial Interface Board (International Only) View65
Optional Expansion Unit View66
Optional Tape Drive Expansion Unit View66
Cable Kit67
Miscellaneous Hardware Kit68
Removal and Replacement Procedures69
Preparation Procedure69
Keyboard Assembly69
To Remove the Rear Panel71
To Replace the Rear Panel71
Interface Connector Cover72
Microprocessor Cover73
Microprocessor Cover Location74
Removing the Microprocessor Cover74
System Board Cover75
Bit Memory/Modem Interface Board76
Internal Modems78
Disconnecting the Led/Speaker and Keyboard Cables79
Internal Modem and Modem Ground Bracket Locations79
Removing the Modem Ground Bracket Screw80
Removing the Modem Bezel80
Second Serial Interface Board (International Only)81
Removing the Internal Modem81
Second Serial Interface Board Location82
Memory Expansion Boards83
Removing the Second Serial Interface Board83
To Remove a Memory Expansion Board84
Compaq Portable 386 Memory Expansion Process84
Memory Expansion Board Location85
Memory Upgrade Kit86
Removing a Memory Expansion Board86
Memory Module Location on the System Board87
Removing the Memory Module from the System Board87
Memory Module Location88
System ROM89
System Board91
Disconnecting System Board Cables92
Removing System Board Screws93
Disconnecting the RGBI Cable Assembly93
Plasma Display Controller Board94
Mass Storage Device Assembly96
Removing the Drive Bezel96
Disconnecting the Drive Cables97
Mass Storage Device Subassembly Location97
Removing the Mass Storage Device Subassembly Screw98
Fixed Disk Drive99
Removing the Mass Storage Device Subassembly99
Diskette Drive101
To Remove the Diskette Drive Assembly102
To Remove the Power Supply104
Disconnecting the Plasma Display Power Connector104
Mass Storage Device Enclosure107
Led/Speaker Cable, Keyboard Cable, and LED Assembly109
Plasma Display115
Plasma Display Filter121
Brightness Control Assembly121
Display Enclosure122
Display Power Cable Assembly and Display Data Cable Assembly127
Handle and Spreader Plate131
Battery133
To Remove the Battery134
To Remove the Expansion Unit135
To Remove the 300/600 Megabyte Fixed Disk Drive Expansion Unit138
To Replace the Expansion Unit138
Fixed Disk Drive Removal139
To Remove the Power Supply from the Fixed Disk Drive Expansion Unit142
External Interface Adapter Board144
Jumper and Switch Settings147
System Board Overview147
System Board Jumper Settings148
Jumpers E1, E2, and E7 - Select Parallel Port Options148
Jumpers E3, E4, E8, and E9 - Select Serial Communications149
Jumpers E5 and E6 - Select Drive Options150
Jumpers E13 and E14 - Select Amount of 32 Bit Memory to be Used as150
Jumpers E15, E16, and E17 - Select Total 32 Bit Memory Installed150
Jumper E19 - Enables/Disables Fail Safe Timer150
Compaq Enhanced Color Graphics Board Jumper and Switch Settings151
Jumper E20 - Selects 20 Mhz 80387 Coprocessor Installation151
Jumper E21 - Selects System Speed at Power on151
Jumper E23 - Selects Plasma Display Mode at Power on151
Compaq Enhanced Color Graphics Board View152
Configuration Switch Bank SW1153
COMPAQ Enhanced Color Graphics Board as the Primary/Only Display Controller Board Switch Settings153
COMPAQ Enhanced Color Graphics Board as the Secondary Display Controller Board Switch Settings154
Configuration Switch Bank SW2155
Configuration Switch Bank SW3155
Serial/Parallel Interface Board Switch Settings156
Jumper P1 - Selects Monitor Type156
Jumper JP3 - Selects RGB or COMPAQ Dual Mode Monitor156
Video Graphics Controller Board157
ESDI External Fixed Disk Drive Controller Board159
Mass Storage Configurations160
System Configuration160
Maximum Storage160
Mirroring161
Duplexing162
Setting up the Fixed Disk Drive Expansion Unit163
The EXTDISK.SYS Device Driver163
The FDISK Utility163
The FORMAT Command164
Novell Netware Configuration Information164
To Prepare the 1:1 Interleave Buffered ESDI External Fixed Disk Drive Controller Board165
ABEND: Not Enough Memory for Disk FAT Tables (Message)166

Compaq PORTABLE 386 - Page 129

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