Compaq Deskpro 386 - Desktop PC Manual

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.

COMPAQ, COMPAQ PORTABLE III, and COMPAQ PORTABLE 386, are trademarks of

Compaq Computer Corporation.

The software described in this guide is furnished under a license agreement

or nondisclosure agreement. The software may be used or copied only in

accordance with the terms of the agreement.

Microsoft, MS, and MS-DOS are trademarks of Microsoft Corporation.

Product names mentioned herein are for identification purposes only and may be

trademarks and/or registered trademarks of their respective companies.

COMPAQ PORTABLE 386 PERSONAL COMPUTER

MAINTENANCE AND SERVICE GUIDE

Second Edition (August 1989)

First Edition (September 1987)

Assy No. 107536-002

Binder Number 197537-001

Text Number 107538-002

Compaq Computer Corporation requires that all peripheral devices be connected

to this computer/product via shielded cables with metal RFI/EMI connector

hoods.

==============================================================================

WIRE TYPE: Multipaired, overall shielded; Belden #98XX; Alpha #54XX;

or equivalent.

CONNECTOR HOOD: RFI/EMI metal shield; AMP #74517X-X; or equivalent.

==============================================================================

It is important that the chassis ground strap of the peripheral device be

connected to the computer chassis. An Alpha #1221 flat braided strap is

sufficient. The strap is not necessary if a shielded cable connects the two

chassis.

COMPAQ PORTABLE 386 PERSONAL COMPUTER MAINTENANCE AND SERVICE GUIDE is a

troubleshooting guide that can be used as a reference when servicing the

COMPAQ PORTABLE 386 Personal Computer. Compaq Computer Corporation reserves

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.

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

CAUTION

Only trained technicians should attempt to repair this equipment. All

troubleshooting and repair procedures are detailed to allow subassembly/module

level repair only. Because of the complexity of the individual boards and

subassemblies, no one should attempt to make repairs at the component level or

make modifications to any printed wiring board. Improper repairs may create a

safety hazard. Indications of component replacement or printed wiring board

modifications may void any warranty or exchange allowances.

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

CAUTION

For proper ventilation of your system, you must provide at least 3 inches

(8 cm) of clearance on all sides of the computer, except underneath.

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

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.

Chapter 2. OPERATING AND PERFORMANCE SPECIFICATIONS provides operating and

performance specifications for the COMPAQ PORTABLE 386 Personal

Computer.

Chapter 3. POWER ON SELF TEST (POST)/PROBLEM ISOLATION describes the internal

system diagnostic programs that are automatically executed when

you power on the system. This chapter also provides a flowchart

for identifying and correcting problems that can occur with the

COMPAQ PORTABLE 386 Personal Computer during the Power On Self

Test procedure.

Chapter 4. SETUP AND INSPECT (See SUPPORT SOFTWARE MAINTENANCE AND SERVICE

GUIDE.)

Chapter 5. DIAGNOSTICS PROGRAM (See SUPPORT SOFTWARE MAINTENANCE AND SERVICE

GUIDE.)

Chapter 6. ERROR MESSAGES AND CODES lists the Power On Self Test and

DIAGNOSTICS Error Codes. This chapter also provides a required

course of action to resolve the problem described by each error

code.

Chapter 7. ILLUSTRATED PARTS CATALOG provides an illustrated reference for

specific COMPAQ PORTABLE 386 Personal Computer Spare Part Kit

Numbers.

Chapter 8. REMOVAL AND REPLACEMENT PROCEDURES describes how to remove and

replace field subassemblies for the COMPAQ PORTABLE 386 Personal

Computer.

Chapter 9. JUMPER AND SWITCH SETTINGS provides detailed information for

setting jumpers and switches.

Chapter 10. MASS STORAGE CONFIGURATIONS provides information on the

mass storage capabilities of the 300/600 Megabyte Fixed Disk

Drive Expansion Unit.

Chapter 1.2 Required Tools and Supplies

To service the COMPAQ PORTABLE 386 Personal Computer, you need the following

tools:

o Torx T-10 Screwdriver

o Torx T-15 Screwdriver

o Torx Angle T-15 Screwdriver

o 3/16 Inch Open End Wrench

o Integrated Circuit (IC) Removal Tool

o Integrated Circuit (IC) Insertion Tool

o Modem Terminating Plug

o DIAGNOSTICS Program

o Parallel Interface Loopback Plug

o 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:

o COMPAQ PORTABLE 386 PERSONAL COMPUTER OPERATIONS GUIDE (PN 107918-001)

o COMPAQ PORTABLE 386 PERSONAL COMPUTER TECHNICAL REFERENCE GUIDE

(PN 107920-001)

o COMPAQ PORTABLE 386 PERSONAL COMPUTER MEMORY EXPANSION INSTALLATION GUIDE

(PN 107530-002)

o Installation Guides for COMPAQ Portable Computers with Plasma Displays

Mass Storage Devices (PN 107320-003)

Expansion Unit (PN 107323-003)

COMPAQ Internal Modems (PN 107325-002)

40 Megabyte Tape Drive Expansion Unit (PN 107532-002)

Second Serial Board for International Only (PN 107533-001)

o Other Installation Guides

20 MHz 80387 Coprocessor (PN 113165-002)

COMPAQ Color Monitor (PN 106223-001)

300/600 MEGABYTE FIXED DISK DRIVE EXPANSION UNIT INSTALLATION AND

OPERATIONS GUIDE (PN 115835-002)

o COMPAQ ENHANCED COLOR GRAPHICS BOARD INSTALLATION AND OPERATIONS GUIDE

(PN 106540-001)

o COMPAQ ENHANCED COLOR GRAPHICS BOARD/COMPAQ COLOR MONITOR TECHNICAL

REFERENCE GUIDE (PN 106733-001)

o Information Cards

Desktop Pedestal for COMPAQ Personal Computers with Dual Mode Plasma

Displays (PN 107326-002)

Carrying Case for COMPAQ Personal Computers with Dual Mode Plasma

Displays (PN 107327-002)

o MS-DOS Version 4 Software and Documentation (PN 114493-001 and

PN 114496-001)

o MS-DOS VERSION 3 REFERENCE GUIDE (PN 114024-001)

o BASIC VERSION 3 REFERENCE GUIDE (PN 104030-001)

o MICROSOFT Operating System/2 Standard Version 1.1

o Service Advisories and Bulletins

o HOW TO DO BUSINESS WITH COMPAQ SERVICE

o COMPAQ SERVICE QUICK REFERENCE GUIDE (PN 106854-001)

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.

Table 2-1. Electrical and Mechanical Specifications

==============================================================================

Dimensions:

Height 9.8 in. (24.8 cm)

Depth 7.8 in. (19.8 cm)

Width 16.0 in. (40.6 cm)

------------------------------------------------------------------------------

Weight:

Model 40 20 lb (9.1 kg)

Model 100 21 lb (9.5 kg)

Model 110 21 lb (9.5 kg)

------------------------------------------------------------------------------

Power Requirements: Domestic International

-------- -------------

Nominal Line Voltage 120 VAC 230 VAC

Range Line Voltage 102 VAC to 132 VAC 204 VAC to 264 VAC

Line Frequency 60 Hz 50 Hz

Current 3A 2A

------------------------------------------------------------------------------

AC Power Cord:

Length 6 ft (1.8 m)

Gauge 18 AWG

------------------------------------------------------------------------------

Environmental Requirements:

Temperature:

Operating 50oF to 104oF (10oC to 40oC)

Nonoperating 14oF to 122oF (-10oC to 50oC)

Shipping -22oF to 140oF (-30oC to 60oC)

------------------------------------------------------------------------------

Humidity:

Operating 20% to 80% noncondensing

Nonoperating Not less than 5% nor more than 90% noncondensing

------------------------------------------------------------------------------

Shock and Vibrations:

Shock 5 g, 11 ms, half sine (operating)

40 g 11 ms, half sine (nonoperating)

Vibration 1.0 g, 5 to 500 Hz (nonoperating)

0.15 g, 5 to 500 Hz (operating)

------------------------------------------------------------------------------

Heat Dissipation:

Minimum Configuration 35 watts 119.5 BTU/hr

Maximum Configuration 145 watts 495.1 BTU/hr

------------------------------------------------------------------------------

Maximum Unpressured Altitude:

Operating 10,000 ft (3000 m)

Nonoperating 30,000 ft (9100 m)

==============================================================================

Chapter 2.3 Portable Enhanced Keyboard

Table 2-2 lists the specifications for the portable enhanced keyboard.

Table 2-2. Keyboard Assembly Specifications

==============================================================================

Dimensions:

Height 1.2 in. ( 3.0 cm)

Depth 7.1 in. (18.0 cm)

Width 15.8 in. (40.1 cm)

Cable Length:

Compressed 8.0 in. (20.3 cm)

Extended 30.0 in. (76.2 cm)

Coil Diameter 0.6 in. (1.5 cm)

Interface Industry standard 5 pin

circular DIN type connector

==============================================================================

Chapter 2.4 Compaq Dual Mode Plasma Display

Table 2-3 lists the specifications for the COMPAQ Dual Mode Plasma Display.

Table 2-3. COMPAQ Dual Mode Plasma Display Specifications

==============================================================================

Viewing Area Dimensions:

Height 5.2 in. (13.2 cm)

Width 8.3 in. (21.1 cm)

Diagonal 10.0 in. (25.4 cm)

Weight 2.0 lb. (0.9 kg)

Graphic Resolution 640 x 400

640 x 200

320 x 200

Text Resolution 640 x 400 (80 characters x 25 lines)

==============================================================================

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 1.1 in. (2.8 cm)

Depth 8.0 in. (20.3 cm)

Width 5.8 in. (14.6 cm)

Weight 1.9 lb (0.9 kg)

Media:

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 2.6 360 KByte Diskette Drive

Table 2-5 lists the specifications for the 360 Kbyte diskette drive.

Table 2-5. 360 Kbyte Diskette Drive Specifications

==============================================================================

Dimensions:

Height 1.1 in. (2.8 cm)

Depth 8.0 in. (20.3 cm)

Width 5.8 in. (14.6 cm)

Weight 1.9 lb (0.9 kg)

Media:

Tracks per Inch 48

Number of Tracks 40

Data Transfer Rate 250 Kb/s

==============================================================================

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 1.00 in. (2.5 cm)

Depth 5.91 in. (15.0 cm)

Width 4.00 in. (10.2 cm)

Weight 1.00 lb (0.45 kg)

Media: 3 1/2 inch 1.44 megabyte double sided diskette;

dual density (720 Kbyte format); high density

(1.44 megabyte format)

Tracks per Inch 135

Number of Tracks 160

Data Transfer Rate 250 Kb/s (1.44 megabyte format)

500 Kb/s (720 Kbyte format)

Average Access Time 100 ms

Rotational Speed 300 rpm

Motor Start Time 800 ms

Sectors per Track 18 (1.44 megabyte format)

9 (720 Kbyte format)

Bytes per Sector 512

==============================================================================

Chapter 2.8 40 Megabyte Fixed Disk Drive

Table 2-7 lists the specifications for the 40 megabyte fixed disk drive.

Table 2-7. 40 Megabyte Fixed Disk Drive Specifications

==============================================================================

Dimensions:

Height 1.5 in. (3.8 cm)

Depth 4.0 in. (10.2 cm)

Width 5.8 in. (14.6 cm)

Weight 1.9 lb (0.9 kg)

Drive Type

(used in SETUP program) 17 or 43

Media:

Number of Surfaces 4

Tracks per Surface 805

Number of Logical Data Heads 5

Number of Logical Cylinders 980

Average Access Time less than 30 ms

Data Transfer Rate 8 Mb/s

Interleave 1:1 for Drive Type 43

3:1 for Drive Type 17

==============================================================================

Chapter 2.9 100 Megabyte Fixed Disk Drive

Table 2-8 lists the specifications for the 100 megabyte fixed disk drive.

Table 2-8. 100 Megabyte Fixed Disk Drive Specifications

==============================================================================

Dimensions:

Height 1.6 in. (3.8 cm)

Depth 5.8 in. (14.6 cm)

Width 4.0 in. (10.2 cm)

Weight 2.9 lb. (1.9 kg)

Drive Type

(used in SETUP program) 45

Media:

Number of Surfaces 8

Tracks per Surface 748

Number of Logical Data Heads 8

Number of Logical Cylinders 748

Average Access Time less than 25 ms

Data Transfer Rate 10 Mb/s

Interleave 3:1

==============================================================================

Cha

ter 2.10 110 Me

te Fixed Disk Drive

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