Compaq Deskpro 4000N - Desktop PC User manual

MAINTENANCE

& SERVICE GUIDE

Compaq Deskpro 4000N and 4000S

Network Personal Computers

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.

1997 Compaq Computer Corporation.

Compaq, Deskpro

Registered U. S. Patent and Trademark Office.

Microsoft, MS-DOS, and Windows are registered trademarks of Microsoft 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.

Product names mentioned herein may be trademarks and/or registered trademarks of their

respective companies.

Maintenance & Service Guide

Compaq Deskpro 4000S and 4000N Series of Personal Computers

Second Edition (August 1997)

First Edition (July 1997)

Part Number 288388-002

Spare Part Number 288457-001

Compaq Computer Corporation

CPS

Preface vii

preface

ABOUT THIS GUIDE

This Maintenance and Service Guide is a troubleshooting and repair guide that can be used for

reference when servicing the Compaq Deskpro 4000S and 4000N Series of Personal Computers.

Only authorized technicians trained by Compaq should attempt to repair this equipment.

Compaq Computer Corporation reserves the right to make changes to the Compaq Deskpro 4000S

and 4000N Series of Personal Computers without notice.

Symbols and Conventions

The following text and symbols mark special messages throughout this guide:

!WARNING: Text set off in this manner indicates that failure to follow directions in the warning could result

in bodily harm or loss of life.

CAUTION: Text set off in this manner indicates that failure to follow directions could result in damage to

equipment or loss of data.

✎Text set off in this manner presents commentary, sidelights, clarifying information, or specific

instructions.

The following format conventions distinguish elements of the text throughout this guide:

■Drive letters that are not in command lines are presented in uppercase type as shown here:

drive A.

■Folder or directory names that are not in command lines are presented in uppercase type as

shown here: DIRECTORY.

■The file names are presented in uppercase italic type as shown here: FILENAME.

■The names of commands are presented in lowercase as shown here: install or a:\install.

■Commands that are to be entered at the system prompt may be shown on a separate line:

a:\install

■When you need to type information without pressing Enter, you are directed to “type” the

information.

■When you need to type the information and press Enter, you are directed to “enter” the

information.

viii Preface

Technician Notes

!WARNING: Only authorized technicians trained by Compaq should attempt to repair this equipment. All

troubleshooting and repair procedures are detailed to allow only subassembly/module level repair.

Because of the complexity of the individual boards and subassemblies, no one should attempt to make

repairs at the component level or to make modifications to any printed wiring board. Improper repairs can

create a safety hazard. Any indications of component replacement or printed wiring board modifications

may void any warranty.

CAUTION: To properly ventilate your system, you must provide at least 3-inches (7.6-cm) of clearance

at the front and back of the computer.

CAUTION: The computer is designed to be electrically grounded. To ensure proper operation, plug the

AC power cord into a properly grounded AC outlet only.

System Serial Number

The serial number is located on the right side of the system unit cover on the bottom front.

For the purpose of AssetControl, the serial number is embedded in the CMOS on the system board.

Locating Additional Information

The following documentation is available to support these products:

■User Documentation

■Technical Training Guides

■Compaq Service Advisories and Bulletins

■Compaq QuickFind

■Technical Reference Guide

■Compaq Service Quick Reference Guide

Compaq Deskpro 4000S and 4000N Personal Computers 1-1

chapter 1

PRODUCT DESCRIPTION

This chapter describes the model offerings and features of the Compaq Deskpro 4000S and 4000N

Series of Personal Computers.

Figure 1-1. Compaq Deskpro 4000S and 4000N Series Personal Computers

1-2 Product Description

1.1 Models

Table 1-1

Deskpro 4000S Models

Configuration

Code Processor/

Speed* Diskette

Drive CD-ROM

Drive Hard

Drive Standard

Memory Maximum

Memory Internal

Cache Internal

Graphics

BPC2 P55C/166 1.44-MB std n/a 2.1-GB 16-MB 256-MB 256-KB S3/KV2**

BPC3 P55C/166 1.44-MB std 20X max 2.1-GB 32-MB 256-MB 256-KB S3/KV2**

BPD2 P55C/200 1.44-MB std n/a 2.1-GB 16-MB 256-MB 256-KB S3/KV2**

BPD3 P55C/200 1.44-MB std 20X max 2.1-GB 32-MB 256-MB 256-KB S3/KV2**

BSL2 P55C/233 1.44-MB std n/a 2.1-GB 16-MB 256-MB 256-KB S3/KV2**

BSL3 P55C/233 1.44-MB std 20X max 2.1-GB 32-MB 256-MB 256-KB S3/KV2**

* P55C is an Intel Pentium Processor with MMX Technology.

**S3 Enhanced 64-bit Graphics.

Table 1-2

Deskpro 4000N Models

Configuration

Code Processor/

Speed* Hard Drive Standard

Memory Maximum

Memory Internal

Cache Internal

Graphics

BQZ3 P55C/166 1.6-GB 16-MB 256-MB 256-KB S3/KV2**

BQZ2 P55C/166 1.6-GB 32-MB 256-MB 256-KB S3/KV2**

BQ22 P55C/200 1.6-GB 32-MB 256-MB 256-KB S3/KV2**

BSS2 P55C/233 1.6-GB 32-MB 256-MB 256-KB S3/KV2**

*P55C is an Intel Pentium Processor with MMX Technology.

**S3 Enhanced 64-bit Graphics.

Compaq Deskpro 4000S and 4000N Personal Computers 1-3

1.2 Features

Table 1-3

Features

Item Description

Processor

Speed, MHz

Intel Pentium Processor with MMX Technology

166, 200, 233

Cache, capacity in Kb

L1 (P54C only)

L1 (P55C only)

L2 (write-through, direct mapped)

256

Architecture

CMOS RAM, battery backed

Plug and Play capability

PCI/ISA

242-byte

standard

Chipset VIA Apollo VP-2

ROM BIOS Flash memory device

Memory, non-parity, 66 MHz, SDRAM (without ECC)

Base, MB

Maximum, MB

Upgrade modules available, MB

DIMM sockets

16 or 32

256

8, 16, 32, 64, 128

Bays

Deskpro 4000S

Deskpro 4000N

3.5-inch Internal/3.5-inch External/5.25-inch External Slimline

3.5-inch Internal

Expansion slot

Deskpro 4000S

Deskpro 4000N

One 7-inch PCI/ISA combination

One 7-inch PCI

Diskette drive, 3.5-inch drive bay (Deskpro 4000S only)

Standard

Optional (replaces 1.44-MB drive)

1.44-MB

120-MB (LS-120)

Hard drive, capacity in GB

Standard, EIDE with drive fault prediction

Optional, Ultra ATA with drive fault prediction*

Optional Ultra SCSI

1.6 (Deskpro 4000N), 2.1 (Deskpro 4000S)

2.4, 4.3

2.1, 4.2

CD-ROM drive (Deskpro 4000S only) 20X max Slimline on select models

Audio (Deskpro 4000S only)

Enhanced Business Pro Audio

Compaq Multimedia Sound System

Optional

Graphics, embedded on system board S3 Trio 64V2/GX Enhanced 64-bit Graphics with 2-MB memory

Network interface, embedded on system board Compaq Netelligent 10/100 TX Embedded UTP controller

*Drives are for replacement purposes only.

continued

1-4 Product Description

Table 1-2

Continued

Item Description

I/O ports, standard Serial (2)

Parallel

USB (2)

AUI

RJ-45

Monitor

Keyboard

Mouse

Power supply (2,000 volt surge suppressant capability) 76-watt, 115 VAC, 2.5 A/230 VAC, 1.25 A

Power supply fan Standard

Internal piezo speaker Standard

Internal battery Standard

Operating System

Deskpro 4000S

Deskpro 4000N

Windows 95

Windows NT

Intelligent Manageability features Asset Management

Fault Management

Security Management

Configuration Management

Integration Management

Two-button mouse Standard

Compaq Enhanced keyboard with MS Windows-specific keys Standard

1.3 Design Overview

The Compaq Deskpro 4000S and 4000N Series of Personal Computers are designed to use a pan-

type chassis to house the system board, expansion boards, power supply, and mass storage devices.

The chassis is supplemented by a riser board attached to the expansion board cage. The expansion

board cage provides a mounting location for the expansion board.

All internal components are accessible when the hood, held in place by two latches, is removed.

Lifting the Easy Access Drive Bay and Easy Access Power Supply to their upright positions allows

full access to the system board. The front bezel is mounted to the front of the system unit cover. Torx

T-15 screws are used to secure the Easy Access Drive Bay hinge bar and the Easy Access Power

Supply hinge bracket.

The system board is easily removed from the chassis after the hood and expansion board cage are

removed. Details of the disassembly procedure are found in Chapter 5, “Removal and Replacement

Procedures.”

The removable expansion board cage mounts perpendicular to the system board. The expansion

board installation is horizontal into the cage and is secured with a single screw.

The Easy Access Power Supply is mounted in the right rear corner of the chassis and pivots using a

pair of built-in hinges. The AC input cord must be removed prior to disconnecting the power supply

from the system board.

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