Compaq 201579-002 Maintenance & Service Guide

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Page 1

Maintenance & Service Guide

Compaq Deskpro EN Series of Personal Computers

Small Form Factor Models

Page 2

Addendum #1 to Deskpro EN Maintenance & Service Guide

Compaq Deskpro EN Series of Personal Computers

Small Form Factor

Part number 201579-002

Spare part number 201844-001

The complete MSG follows this addendum.

This addendum contains changes to the original document.

 2000 Compaq Computer Corporation. COMPAQ and the Compaq logo Registered in U. S. Patent and Trademark Office. Product names mentioned herein may be trademarks and/or registered trademarks of their respective companies. Second Edition (September 2000).

Addendum to MSG 201579-002

Page 3

Spare Part Numbers

Front Trim #219816-001

Description

Front trim (below front bezel) (167113-002) Use only with system board 217056-001 without onboard audio

Intel Celeron Processor

Graphics Controller

✎

System board 217056-001 does not support front-mounted audio. Computers with this board installed will not have a speaker mounted in the chassis but will have a piezo speaker mounted on the system board that supports diagnostic beeps.

Spare Part Number

Warranty Tier

D219816-001

B217056-001System board without onboard audio (011035-101)

B203967-001566 MHz/66 MHz with heatsink and retainer clip

A179997-001nVIDIA TNT2 PRO, 16-MB SGRAM B203139-00110-GB Ultra ATA hard drive, 5400 RPM, Quiet Drive

2 Addendum to MSG 201579-002

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Specifications – Graphics Controller

nVIDIA TNT2 Pro Graphics Controller

640 x 480 800 x 600 1024 x 768 1152 x 864 1280 x 1024 1600 x 1200 1800 x 1440 1920 x 1080 1920 x 1200

Real-Time 3DResolution

Shading

256, 65K, 16.7M 256, 65K, 16.7M 256, 65K, 16.7M 256, 65K 256, 65K 256 65K 256 256, 65K

Refresh Rate/Display

60 – 200 Hz 60 – 200 Hz 60 – 140 Hz 60 – 120 Hz 60 – 100 Hz 60 – 90 Hz 60 – 70 Hz 60 – 80 Hz 60 – 76 Hz

HorizontalVertical

31 – 102 kHz 38 – 114 kHz 48 –113 kHz 54 – 110 kHz 64 – 107 kHz 75 – 113 kHz 89 – 1 04 kHz 70 – 94 kHz 75 – 95 kHz

Addendum to MSG 201579-002

Page 5

Service Notes

Before installing a heatsink, prepare for its installation by doing one of the following:

! New heatsink: if the heatsink has a thermal interface attached to its bottom, peel off the

! Reinstalled heatsink: Note where the thermal interface is located on the heatsink.

WARNING: Removing the heatsink from the processor destroys the integrity of the thermal interface pad

between the two parts. Whenever the heatsink is removed from the processor, the old thermal interface must be completely removed and a new one installed in its place.

protective paper before installing the heatsink.

Carefully remove the thermal interface pad and all residue from the heatsink surface. If any thermal interface remains on the die of the processor, scrape it off with your fingernail. A Q-Tip dipped in alcohol can be used to clean both surfaces. Add thermal interface pad to the bottom of the heatsink before reinstalling the original heatsink to insure an efficient thermal interface.

CAUTION: Thermal interface heat transmission is reduced if residue remains on the heatsink or the heatsink thermal interface surface is scratched. This could lead to the processor running at a higher than normal temperature, fan turning at a higher than normal speed, and possible loss of data if processor shuts down from overheating. Installing the heatsink assembly backwards will cause the processor to overheat, since the aluminum core will only make partial contact with the processor die.

4 Addendum to MSG 201579-002

Page 6

Maintenance & Service Guide

Compaq Deskpro EN Series of Personal Computers

Small Form Factor Models

Page 7

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.

 2000 Compaq Computer Corporation. Printed in the U.S.A. COMPAQ, the Compaq logo, and Deskpro Registered in U. S. Patent and

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

Corporation. Intel and Pentium are registered trademarks of Intel Corporation. Celeron is a trademark of Intel Corporation. Product names mentioned herein may be trademarks and/or registered trademarks of

their respective companies. 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.

Maintenance & Service Guide

Compaq Deskpro EN Series of Personal Computers Small Form Factor Models

Second Edition (September 2000) First Edition (June 2000) Part Number 201579-002 Spare Part Number 201844-001

Compaq Computer Corporation

Page 8

preface

About This Guide

Symbols and Conventions.........................................................................................................vii

Technician Notes.......................................................................................................................vii

Locating Additional Information .............................................................................................viii

chapter 1

Product Description

1.1 Product Features ............................................................................................................. 1-2

1.1.1 Front Panel Controls and LEDs ......................................................................... 1-2

1.1.2 Rear Panel Connectors ....................................................................................... 1-3

1.1.3 Drive Positions................................................................................................... 1-4

1.2 Serial Number Location.................................................................................................. 1-5

1.3 Locating Additional Information.................................................................................... 1-6

chapter 2

Spare Parts

2.1 System Unit .................................................................................................................... 2-1

2.2 Mass Storage Devices..................................................................................................... 2-2

2.3 Cables ............................................................................................................................. 2-3

2.4 Standard and Optional Boards ........................................................................................ 2-4

2.5 Keyboards....................................................................................................................... 2-5

2.6 Miscellaneous Plastics Kit .............................................................................................. 2-6

2.7 Miscellaneous Parts ........................................................................................................ 2-7

2.8 Shipping Boxes...............................................................................................................2-8

2.9 Documentation................................................................................................................2-8

ONTENTS

chapter 3

Removal and Replacement Preliminaries

3.1 Electrostatic Discharge Information ............................................................................... 3-1

3.1.1 Generating Static................................................................................................ 3-1

3.1.2 Preventing Electrostatic Damage to Equipment................................................. 3-2

3.1.3 Personal Grounding Methods and Equipment ................................................... 3-2

3.1.4 Grounding Workstations .................................................................................... 3-2

3.1.5 Recommended Materials and Equipment........................................................... 3-3

3.2 Routine Care ................................................................................................................... 3-3

3.2.1 General Cleaning Safety Precautions................................................................. 3-3

3.2.2 Cleaning the Computer Case.............................................................................. 3-4

3.2.3 Cleaning the Keyboard....................................................................................... 3-4

3.2.4 Cleaning the Monitor ......................................................................................... 3-4

3.2.5 Cleaning the Mouse............................................................................................ 3-5

Contents iii

Page 9

Service Considerations ................................................................................................... 3-53.3

3.3.1 Power Supply Fan .............................................................................................. 3-5

3.3.2 Tools and Software Requirements ..................................................................... 3-5

3.3.3 Screws ................................................................................................................ 3-5

3.3.4 Cables and Connectors....................................................................................... 3-6

3.3.5 Hard Drives ........................................................................................................ 3-6

3.3.6 Lithium Coin Cell Battery.................................................................................. 3-6

chapter 4

Removal & Replacement Procedures

4.1 Disassembly Sequence Chart.......................................................................................... 4-2

4.2 Preparation for Disassembly........................................................................................... 4-3

4.3 Unlocking the Smart Cover Lock ................................................................................... 4-4

Using the Smart Cover FailSafe Key.............................................................................. 4-4

4.4 Computer Feet ................................................................................................................4-6

4.5 Cable Lock Installation................................................................................................... 4-7

4.6 Computer Cover ............................................................................................................. 4-8

4.7 Bezel Blank..................................................................................................................... 4-9

4.8 Drives............................................................................................................................ 4-10

4.8.1 5.25-Inch Drive ................................................................................................ 4-11

4.8.2 Diskette Drive .................................................................................................. 4-12

4.8.3 Hard Drive........................................................................................................ 4-13

4.9 Data Cable Installation.................................................................................................. 4-14

4.10 Memory Expansion....................................................................................................... 4-15

DIMMs ......................................................................................................................... 4-15

Memory Module Installation ........................................................................................ 4-15

4.11 Battery .......................................................................................................................... 4-17

4.12 Speaker Assembly ........................................................................................................ 4-18

4.13 Front Bezel ................................................................................................................... 4-19

4.14 Expansion Card Cage Components .............................................................................. 4-20

4.14.1 Expansion Card Cage....................................................................................... 4-20

4.14.2 Expansion Card ................................................................................................ 4-21

4.14.3 Riser Board....................................................................................................... 4-22

4.15 Easy Access Power Supply........................................................................................... 4-23

4.16 I/O Panel ....................................................................................................................... 4-24

4.17 System Board................................................................................................................4-25

4.18 Front Trim..................................................................................................................... 4-26

4.19 Processors ..................................................................................................................... 4-27

4.19.1 Type 1 Processor Assembly ............................................................................. 4-27

4.19.2 Type 2 Processor Assembly ............................................................................. 4-29

chapter 5

Connectors and Jumpers

5.1 System Board.................................................................................................................. 5-1

5.1.1 Connectors and Jumpers - System Board 187499-001 ...................................... 5-1

5.1.2 Connectors and Jumpers - System Board 187500-001 ...................................... 5-2

5.1.3 Clearing CMOS.................................................................................................. 5-3

5.1.4 Disabling or Clearing the Power-On and Setup Passwords ............................... 5-4

5.1.5 CMOS Archive and Restore (Power Switch Override)...................................... 5-5

5.2 Riser Board – Connectors and Jumpers.......................................................................... 5-6

5.3 Hard Drive Jumper Settings............................................................................................ 5-7

5.3.1 Seagate, Fujitsu, and Western Digital ................................................................ 5-7

5.3.2 Maxtor................................................................................................................ 5-8

iv Contents

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chapter 6

Specifications

6.1 System ............................................................................................................................ 6-1

6.1.1 Specifications ..................................................................................................... 6-1

6.1.2 System Interrupts ............................................................................................... 6-2

6.1.3 System DMA...................................................................................................... 6-2

6.1.4 ICH Fixed I/O Registers..................................................................................... 6-3

6.1.5 System Memory Map......................................................................................... 6-5

6.2 Drives.............................................................................................................................. 6-6

6.2.1 Diskette Drive .................................................................................................... 6-6

6.2.2 Ultra ATA Hard Drives...................................................................................... 6-7

6.2.3 CD-ROM Drive.................................................................................................. 6-8

6.3 Keyboards....................................................................................................................... 6-9

6.4 Mouse ............................................................................................................................. 6-9

6.5 Supported Graphics Resolutions................................................................................... 6-10

6.5.1 Intel 3D Graphics (System Board 187500-001)............................................... 6-10

6.5.2 nVIDIA TNT 3D AGP (System Board 187499-001) ...................................... 6-10

chapter 7

Service Notes................................................................................................................................

7-1

Index ..............................................................................................................................................

I-1

Contents v

Page 11

preface

BOUT THIS GUIDE

This

Maintenance & Service Guide

for reference when servicing the Compaq Only authorized technicians trained by Compaq should attempt to repair this equipment.

Compaq Computer Corporation reserves the right to make changes to the these models without notice.

Symbols and Conventions

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

WARNING

in bodily harm or loss of life.

CAUTION:

to equipment or loss of data.

✎

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

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

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

Technician Notes

is a troubleshooting and repair guide that can be used

Deskpro EN Series of Personal Computers.

WARNING:

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.

WARNING:

•

CAUTION:

at the front and back of the computer.

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

To reduce the risk of electric shock or damage to the equipment:

Do not disable the power grounding plug. The grounding plug is an important safety feature.

Plug the power cord into a grounded (earthed) electrical outlet that is easily accessible at all times.

Disconnect the power from the computer by unplugging the power cord either from the electrical outlet or the computer.

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

Compaq Deskpro EN Series of Personal Computers vii

Page 12

Locating Additional Information

The following documentation is availab le to suppo rt the se produc ts :

User Documentation

■

Technical Training Guides

■

Compaq Service Advisories and Bulletins

■

Compaq QuickFind

■

Technical Reference Guide

■

Compaq Quick Reference Guide

■

Compaq Service Reference Guide

■

Compaq Quick Troubleshooting Guide

■

viii About This Guide

Page 13

chapter

RODUCT DESCRIPTION

This chapter describes the features of the Compaq Deskpro EN Small Form Factor Series of Personal Computers.

Compaq Deskpro EN Series of Personal Computers 1-1

Page 14

1.1 Product Features

The Small Form Factor models ship with a mouse and keyboard. A Compaq color monitor or other compatible monitor, which is also required to operate the computer, must be purchased separately.

1.1.1 Front Panel Controls and LEDs

4 5

;

Stereo Headphone Jack

CD-ROM Drive Volume Control

CD-ROM Drive Busy Indicator

CD-ROM Drive Eject Button

Power-On Light

Power Button

Drive Activity Light

Microphone Jack

Headphone Jack

Diskette Drive Activity Light

Diskette Eject Button

1-2 Product Description

Page 15

1.1.2

Rear Panel Connectors

✎

; <

Voltage Select Switch (115V/230V)

Power Cord Connector

Serial Connector

Audio Line Out Connector

Audio Line In Connector

Parallel Connector

Ethernet RJ-45 Connector

Serial Connector

Double-stacked USB Connectors

Monitor Connector

Keyboard Connector

Mouse Connector

Connectors include icons for ease of identification.

Compaq Deskpro EN Series of Personal Computers 1-3

Page 16

1.1.3 Drive Positions

3.5-inch, internal, third-height, standard hard drive bay

5.25-inch drive bay for optional drives

3.5-inch, third-height, standard, 1.44-MB diskette drive

To verify the type, size, and capacity of the mass storage devices instal led in the computer, run the F10 setup utility available at computer startup.

1-4 Product Description

Page 17

1.2 Serial Number Location

Provide the computer serial number to Compaq when requesting information or ordering spare parts. The serial number is displayed on the top of the computer cover at the right front corner and also on the side near the back of the computer.

Compaq Deskpro EN Series of Personal Computers 1-5

Page 18

1.3 Locating Additional Information

The following documentation is availab le to suppo rt the se produc ts :

User Documentation

■

Technical Training Guides

■

Compaq Service Advisories and Bulletins

■

Compaq QuickFind

■

Technical Reference Guide

■

Compaq Quick Reference Guide

■

Compaq Service Reference Guide

■

Compaq Quick Troubleshooting Guide

■

1-6 Product Description

Page 19

chapter

SPARE PARTS

This chapter provides an illustrated parts breakdown and a reference for spare parts for the Small Form Factor models.

2.1 System Unit

Spare Part

Description

Computer cover 226774-001

Front bezel 201488-001 D

3 Expansion card cage Not spared

4 Power supply, 120 W 176763-001 B

5 Chassis assembly, including drive cage Not spared

6 Front trim 201487-001 D

Compaq Deskpro EN Series of Personal Computers 2-1

Number

Warranty Tier

Page 20

2.2 Mass Storage Devices

Spare Part

Description

1 10.0-GB Ultra ATA Hard drive 66/7200 RPM 135364-001 B

* 15.0-GB Ultra ATA Hard drive 66/7200 RPM 192060-001 B

2 3.5-inch, 1.44-MB diskette drive 191714-001 B

3 48X Max IDE CD-ROM drive, opal 187263-001 B

*Not shown.

Number

Warranty Tier

2-2 Spare Parts

Page 21

2.3 Cables

Spare Part

Description

Number

Cable kit, includes: 201486-001

1 Diskette drive data cable, 8.5 (168999-001)

2 CD-ROM audio cable, 12 (387527-001)

3 Hard drive data cable, 18 (108950-016)

* Solenoid cable (174311-001)

* CD-ROM data cable, 18 (108950-017)

Cable kit, includes: 192263-001

* CD-ROM data cable, 18 (108950-017)

* CD-ROM audio cable, 12 (387527-002)

*Not shown.

Warranty Tier

Compaq Deskpro EN Series of Personal Computers 2-3

Page 22

2.4 Standard and Optional Boards

Spare Part

Description

1 System board, including 16 MB integrated AGP graphics 187499-001 B

2 System board, including 4 MB integrated graphics 187500-001 B

Intel Pentium III Microprocessor

3 667/133 MHz, includes fansink assy (174989-002)

3 733/133 MHz, includes fansink assy (174989-002)

3 800/133 MHz, includes fansink assy (174989-002)

4 866/133 MHz, includes fansink assy (200478-001)

4 933/133 MHz, includes fansink assy (200478-001)

5 Riser Board 171489-001 B

6 64 MB 170080-001 B

* 128 MB 170081-001 B

* 256 MB 192014-001 B

7 Modem, 56K, PCI 157071-B21 B

*Not shown.

600/66 MHz, includes fansink assy (174989-002) (use with system board 187500-001 only)

(use with system board 187500-001 only)

(use with system board 187499-001 and 187500-001)

(use with system board 187499-001 only)

Memory Module (SDIMM, SDRAM, 133MHz)

Number

194972-001 B

194973-001 B

194974-001 B

194975-001 B

194976-001 B

201490-001 B

Warranty Tier

2-4 Spare Parts

Page 23

2.5 Keyboards

Description Spare Part Number Warranty

* Easy Access Keyboard-US 123130-xxx D

* USB Easy Access Keyboard-US 173304-xxx D

* Enhanced, Smart Card-US 125761-xxx D

* Basic, Smart Card-US 125790-xxx D

* Spacesaver, Opal 269513-xxx D

* Arabic -171

* Belgian -181

* Brazilian -201

BHCSY (Bosnia-Herzegovina, Croatia, Slovenia, and Yugoslavia)

* Czech -221

* Danish -081

* Dutch/Netherlands -B31

* Finnish -351

* French -051

* French Canadian -121

* German -041

* Greek -151

* Hungarian -211

* Italian -061

* Japanese -191

* Korean (Hanguel) -AD1

* International -B31

* Latin American Spanish -161

* Norwegian -091

* Polish -B31

* Portuguese -131

* Russian -251

* Slovakian -231

* Spanish -071

* Swedish -101

* Swiss -111

* Taiwanese -AB1

* Thai -281

* Turkish -141

* UK -031

* US -001

*Not shown

Tier

-B41

Compaq Deskpro EN Series of Personal Computers 2-5

Page 24

2.6 Miscellaneous Plastics Kit

Description

Spare Part Number

Warranty Tier

Miscellaneous Plastics Kit, includes: 201489-001 D

1 Bezel blank (171991-001)

2 Foot, rubber (4 ea.) (166939-002)

2-6 Spare Parts

Page 25

2.7 Miscellaneous Parts

Spare Part

Description

1 Two-button mouse 334689-002 D

2 Battery 153099-001 D

3 Solenoid, 2-coil 201485-001 B

4 Speaker 201273-001 D

5 Front bezel 201488-001 D

6 Front trim (below front bezel) 201487-001 D

* Tamper Resistant T-15 Wrench 166527-001 A

* Tamper Resistant T-15 Bit (5 ea) 166527-002 A

*Not shown.

Number

Warranty Tier

Compaq Deskpro EN Series of Personal Computers 2-7

Page 26

2.8 Shipping Boxes

Description

PC Return kit (shipping box with packing) 212545-001 A

2.9 Documentation

Description Spare Part Number

Documentation

Maintenance & Service Guide 201844-001

Illustrated Parts Map 203723-001

Compaq Deskpro Service Reference Guide 152611-001

Compaq Quick Troubleshooting Guide 153837-001

Spare Part Number

Warranty Tier

2-8 Spare Parts

Page 27

chapter

EMOVAL

& R

This chapter provides general service information for the computer. Adherence to the procedures and precautions described in this chapter is essential for proper service.

EPLACEMENT PRELIMINARIES

CAUTION: When the computer is plugged into an AC power source there is always voltage applied to the system board. You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage.

3.1 Electrostatic Discharge Information

A sudden discharge of static electricity from your finger or other conductor can destroy static-sensitive devices or microcircuitry. Often the spark is neither felt nor heard, but damage occurs. An electronic device exposed to electrostatic discharge (ESD) may not be affected at all and can work perfectly throughout a normal cycle. The device may function normally for a while, then degrade in the internal layers, reducing its life expectancy.

Networks built into many integrated circuits provide some protection, but in many cases, the discharge contains enough power to alter device parameters or melt silicon junctions.

3.1.1 Generating Static

The following table shows that:

Different activities generate different amounts of static electricity.

! Static electricity increases as humidity decreases.

Relative Humidity

Event 55% 40% 10%

Walking across carpet 7,500 V 15,000 V 35,000 V Walking across vinyl floor 3,000 V 5,000 V 12,000 V Motions of bench worker 400 V 800 V 6,000 V

Removing DIPs* from plastic tube 400 V 700 V 2,000 V Removing DIPs* from vinyl tray 2,000 V 4,000 V 11,500 V Removing DIPs* from Styrofoam 3,500 V 5,000 V 14,500 V

Removing bubble pack from PCB 7,000 V 20,000 V 26,500 V Packing PCBs in foam-lined box 5,000 V 11,000 V 21,000 V

*Dual Inline Packaging (DIP) is the packaging around individual microcircuitry. These are then multi-packaged inside plastic tubes, trays, or Styrofoam.

700 volts can degrade a product.

✎

Compaq Deskpro EN Series of Personal Computers 3-1

Page 28

3.1.2 Preventing Electrostatic Damage to Equipment

Many electronic components are sensitive to ESD. Circuitry design and structure determine the degree of sensitivity. The following proper packaging and grounding precautions are necessary to prevent damage to electric components and accessories.

! To avoid hand contact, transport products in static-safe containers such as tubes,

bags, or boxes.

! Protect all electrostatic parts and assemblies with conductive or approved

containers or packaging.

Keep electrostatic sensitive parts in their containers until they arrive at static-free

stations.

! Place items on a grounded surface before removing them from their container.

! Always be properly grounded when touching a sensitive component or assembly.

! Avoid contact with pins, leads, or circuitry.

! Place reusable electrostatic-sensitive parts from assemblies in protective packaging

or conductive foam.

3.1.3 Personal Grounding Methods and Equipment

Use the following equipment to prevent static electricity damage to equipment:

Wrist straps are flexible straps with a minimum of one-megohm +/- 10%

resistance in the ground cords. To provide proper ground, a strap must be worn snug against bare skin. The ground cord must be connected and fit snugly into the banana plug connector on the grounding mat or workstation.

Heel straps/Toe straps/Boot straps can be used at standing workstations and are

compatible with most types of shoes or boots. On conductive floors or dissipative floor mats, use them on both feet with a minimum of one-megohm +/- 10% resistance between the operator and ground.

Static Shielding Protection Levels

Method Voltage

Antistatic plastic 1,500

Carbon-loaded plastic 7,500

Metallized laminate 15,000

3.1.4 Grounding Workstations

To prevent static damage at the workstation, use the following precautions:

! Cover the workstation with approved static-dissipative material. Provide a wrist

strap connected to the work surface and properly grounded tools and equipment.

! Use static-dissipative mats, foot straps, or air ionizers to give added protection.

! Handle electrostatic sensitive components, parts, and assemblies by the case or

PCB laminate. Handle them only at static-free workstations.

! Turn off power and input signals before inserting and removing connectors or test

equipment.

3-2 Removal & Replacement Preliminaries

Page 29

! Use fixtures made of static-safe materials when fixtures must directly contact

dissipative surfaces.

! Keep work area free of nonconductive materials such as ordinary plastic assembly

aids and Styrofoam.

! Use field service tools, such as cutters, screwdrivers, and vacuums, that are

conductive.

3.1.5 Recommended Materials and Equipment

Materials and equipment that are recommended for use in preventing static electricity include:

Antistatic tape

! Antistatic smocks, aprons, or sleeve protectors

! Conductive bins and other assembly or soldering aids

! Conductive foam

! Conductive tabletop workstations with ground cord of one-megohm +/- 10%

resistance

! Static-dissipative table or floor mats with hard tie to ground

! Field service kits

! Static awareness labels

! Wrist straps and footwear straps providing one-megohm +/- 10% resistance

! Material handling packages

Conductive plastic bags

! Conductive plastic tubes

! Conductive tote boxes

! Opaque shielding bags

! Transparent metallized shielding bags

Transparent shielding tubes

3.2 Routine Care

3.2.1 General Cleaning Safety Precautions

1. Never use solvents or flammable solutions to clean the computer.

2. Never immerse any parts in water or cleaning solutions; apply any liquids to a clean cloth and then use the cloth on the component.

3. Always turn off the computer when cleaning with liquids or damp cloths.

4. Always turn off the computer before cleaning the keyboard, mouse, or air vents.

5. Disconnect the keyboard before cleaning it.

6. Wear safety glasses equipped with side shields when cleaning the keyboard.

Compaq Deskpro EN Series of Personal Computers 3-3

Page 30

3.2.2 Cleaning the Computer Case

Follow all safety precautions in Section 3.2.1 before cleaning the computer.

To clean the computer case, follow the procedures described below:

! To remove light stains or dirt, use plain water with a clean, lint-free cloth or swab.

! For stronger stains, use a mild dishwashing liquid diluted with water. Rinse well

by wiping it with a cloth or swab dampened with clear water.

! For stubborn stains, use isopropyl (rubbing) alcohol. No rinsing is needed as the

alcohol will evaporate quickly and not leave a residue.

! After cleaning, always wipe the unit with a clean, lint-free cloth.

! Occasionally clean the air vents on the computer. Lint and other foreign matter can

block the vents and limit the airflow.

3.2.3 Cleaning the Keyboard

Follow all safety precautions in Section 3.2.1 before cleaning the keyboard.

To clean the tops of the keys or the keyboard body, follow the procedures described in Section 3.2.2.

When cleaning debris from under the keys, review all rules in Section 3.2.1 before following these procedures:

CAUTION: Use safety glasses equipped with side shields before attempting to clean debris from under the keys.

! Visible debris underneath or between the keys may be removed by vacuuming or

shaking.

! Canned, pressurized air may be used to clean debris from under the keys. Caution

should be used as too much air pressure can dislodge lubricants applied under the wide keys.

! If you remove a key, use a specially designed key puller to prevent damage to the

keys. This tool is available through many electronic supply outlets.

CAUTION: Never remove a wide leveled key (like the space bar) from the keyboard. If these keys are improperly removed or installed, the keyboard may not function properly.

! Cleaning under a key may be done with a swab moistened with isopropyl alcohol

and squeezed out. Be careful not to wipe away lubricants necessary for proper key functions. Use tweezers to remove any fibers or dirt in confined areas. Allow the parts to air dry before reassembly.

3.2.4 Cleaning the Monitor

! Wipe the monitor screen with a clean cloth moistened with water or with a

towelette designed for cleaning monitors. Do not use sprays or aerosols directly on the screen, the liquid may seep into the housing and damage a component. Never use solvents or flammable liquids on the monitor.

! To clean the monitor body follow the procedures in Section 3.2.2.

3-4 Removal & Replacement Preliminaries

Page 31

3.2.5 Cleaning the Mouse

Before cleaning the mouse, ensure that the power to the computer is turned off.

! Clean the mouse ball by first removing the retaining plate and the ball from the

housing. Pull out any debris from the ball socket and wipe the ball with a clean dry cloth before reassembly.

! To clean the mouse body, follow the procedures in 3.2.2.

3.3 Service Considerations

Listed below are some of the considerations that you should keep in mind during the disassembly and assembly of the computer.

3.3.1 Power Supply Fan

The power supply fan is a variable-speed fan based on the temperature in the power supply.

CAUTION: The cooling fan is off only when the computer is turned off or the power cable has been disconnected.

The cooling fan is always on in all other instances (when the computer is either in the “On,” “Standby,” or “Suspend” mode).

You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage.

3.3.2 Tools and Software Requirements

To service the computer, you need the following:

! Torx T-15 screwdriver (Compaq screwdriver with bits PN 161946-001)

! Flat-bladed screwdriver (may sometimes be used in place of the Torx screwdriver)

! Diagnostics software

! Compaq tamper-resistant T-15 wrench (Smart Cover FailSafe Key, PN 166527-

001) or Compaq tamper-resistant bits (Smart Cover FailSafe Key, PN 166527-002)

3.3.3 Screws

The screws used in the computer are not interchangeable. They may have standard or metric threads and may be of different lengths. If an incorrect screw is used during the reassembly process, it can damage the unit. Compaq strongly recommends that all screws removed during disassembly be kept with the part that was removed, then returned to their proper locations.

As each subassembly is removed from the computer, it should be placed away from

✎

the work area to prevent damage.

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3.3.4 Cables and Connectors

Most cables used throughout the unit are flat, flexible cables. These cables must be handled with care to avoid damage. Apply only the tension required to seat or unseat the cables during insertion or removal from the connector. Handle cables by the connector whenever possible. In all cases, avoid bending or twisting the cables, and ensure that the cables are routed in such a way that they cannot be caught or snagged by parts being removed or replaced.

CAUTION: When servicing this computer, ensure that cables are placed in their proper location during the reassembly process. Improper cable placement can damage the computer.

3.3.5 Hard Drives

Handle hard drives as delicate precision components, avoiding all physical shock and vibration. This applies to failed drives as well as replacement spares.

! If a drive must be mailed, place the drive in a bubble-pack mailer or other suitable

protective packaging and label the package “Fragile: Handle With Care.”

! Do not remove hard drives from the shipping package for storage. Keep hard

drives in their protective packaging until they are actually mounted in the CPU.

! Avoid dropping drives from any height onto any surface.

! If you are inserting or removing a hard drive, turn off the computer. Do not remove

a hard drive while the computer is on or in standby mode.

! Before handling a drive, ensure that you are discharged of static electricity. While

handling a drive, avoid touching the connector. For more information about preventing electrostatic damage, refer to Section 3.1, “Electrostatic Discharge.”

! Do not use excessive force when inserting a drive.

! Avoid exposing a hard drive to liquids, temperature extremes, or products that

have magnetic fields such as monitors or speakers.

3.3.6 Lithium Coin Cell Battery

The battery that comes with the computer provides power to the real-time clock and has a minimum lifetime of about three years.

See Chapter 4, “Removal and Replacement Procedures,” for instructions on the replacement procedures.

WARNING: This computer contains a lithium-ion battery. There is a risk of fire and chemical burn if

the battery is handled improperly. Do not disassemble, crush, puncture, short external contacts, dispose in water or fire, or expose it to temperatures higher than 140ºF (60ºC).

CAUTION: Batteries, battery packs, and accumulators should not be disposed of together with the general household waste.

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chapter

EMOVAL

& R

This chapter provides subassembly/module level removal and replacement procedures for the Small Form Factor.

After completing all necessary removal and replacement procedures, run Diagnostics utility to verify that all components operate properly.

EPLACEMENT PROCEDURES

CAUTION: When the computer is plugged into an AC power source, there is always voltage applied to the system board. You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage.

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4.1 Disassembly Sequence Chart

4.3 Unlocking the Smart Cover Lock

4.4 Computer Feet

4.5 Cable Lock

4.6 Computer Cover

4.7 Bezel Blank

4.8.1 5.25-Inch Drive

4.8.2 Diskette Drive

4.8.3 Hard Drive

4.9 Data Cable Installation

4.10 Memory Expansion

4.11 Battery

4.12 Speaker Assembly

4.13 Front Bezel

4.14.1 Expansion Card Cage

4.14.2 Expansion Card

4.14.3 Riser Board

4.15 Easy Access Power Supply

4.16 I/O Panel

4.17 System Board

4.18 Front Trim

4.19.1 Type 1 Processor Assembly

4.19.2 Type 2 Processor Assembly

4-2 Removal & Replacement Procedures

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4.2 Preparation for Disassembly

See Chapter 3, “Removal and Replacement Preliminaries,” for initial procedures.

1. Unlock the Smart Cover Lock (Section 4.3).

2. Close any open software applications.

3. Exit Windows.

4. Remove any diskette or compact disc from the computer.

5. Turn off the computer and any peripheral devices that are connected to it.

CAUTION: Turn off the computer before disconnecting any cables.

CAUTION: When the computer is plugged into an AC power source there is always voltage applied

to the system board. You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage.

CAUTION: The cooling fan is off only when the computer is turned off or the power cable has been disconnected.

The cooling fan is always on in all other instances (when the computer is either in the “On,” “Standby,” or “Suspend” mode).

You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage.

6. Disconnect the power cord from the electrical outlet and then from the computer.

7. Disconnect all peripheral device cables from the computer.

✎

During disassembly, label each cable as you remove it, noting its position and routing. Keep all screws with the units removed.

CAUTION: The screws used in the computer are of different thread sizes and lengths; using the wrong screw in an application may damage the unit.

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4.3 Unlocking the Smart Cover Lock

The Smart Cover Lock is a software-controllable cover lock, controlled by the setup password. This lock prevents unauthorized access to the internal components. The computer ships with the Smart Cover Lock in the unlocked position. For more information about locking the Smart Cover Lock, refer to the Desktop Management guide.

Using the Smart Cover FailSafe Key

If you enable the Smart Cover Lock and cannot enter your password to disable the lock, you will need a Smart Cover FailSafe Key (see Section 3.3.2) to open the computer cover. You will need the key in any of the following circumstances:

■ Power outage

■ Startup failure

■ PC component (e.g., processor or power supply) failure

■ Forgotten password

CAUTION:

available from Compaq. Be prepared; order this key before you need one.

The Smart Cover FailSafe Key is a specialized tool

To obtain a FailSafe Key:

■ Contact your authorized Compaq reseller or service provider.

■ Refer to the Compaq World Wide Web site (www.compaq.com) for ordering

information.

■ Call the appropriate number listed in the warranty.

To open the computer cover:

1. Prepare the computer for disassembly (Section 4.2).

2. Remove the two tamper-proof screws that secure the Smart Cover Lock to the chassis.

Use the tamper resistant wrench (Compaq PN 166527-001) or the tamper resistant bit (Compaq PN 166527-002).

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3. Remove the computer cover (Section 4.6).

To reattach the Smart Cover Lock, secure the lock in place with the tamper-proof screws.

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4.4 Computer Feet

1. Remove the four rubber feet mounted to the bottom of the chassis.

2. If necessary, scrape the residue of the old feet from the chassis using a small, flat-

bladed screwdriver.

3. Remove the protective strip from the adhesive on the back of the new feet and press them into place.

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4.5 Cable Lock Installation

The rear panel of the computer accommodates a cable lock so that the computer can be physically secured to a work area.

✎

The cable lock can be purchased from Kensington Microware Limited or Compaq authorized dealers, resellers, and service providers. Ask for the Kensington MicroSaver Security System, Model 64068.

Loop the cable around a heavy, fixed object to which you want to secure the computer.

Insert the cable lock end of the cable through the loop end of the cable.

Insert the lock into the appropriate slot on the rear of the computer and lock with the key.

To remove the cable lock provision, reverse the installation procedure.

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4.6 Computer Cover

1. Prepare the computer for disassembly (Section 4.2).

CAUTION: Turn off the computer before disconnecting any cables.

CAUTION: When the computer is plugged into an AC power source there is always voltage applied

to the system board. You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage.

CAUTION: The cooling fan is off only when the computer is turned off or the power cable has been disconnected.

The cooling fan is always on in all other instances (when the computer is either in the “On,” “Standby,” or “Suspend” mode).

You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage.

2. Press in the button on each side of the front bezel to release the quick release cover latches.

3. As you slide the computer cover forward, release the buttons and allow them to return to the original position, then lift the cover up and off the unit.

To replace the computer cover, reverse the removal procedure.

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4.7 Bezel Blank

1. Prepare the computer for disassembly (Section 4.2).

2. Remove the computer cover (Section 4.6).

3. Twist the tab on the left end of the bezel blank.

4. Remove the bezel blank from the front bezel.

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4.8 Drives

The Small Form Factor has one 5.25-inch drive bay, one 3.5-inch diskette drive bay, and one hard drive bay.

3.5-inch, internal, third-height, standard hard drive bay

5.25-inch drive bay for optional drives

3.5-inch, third-height, standard, 1.44-MB diskette drive

Refer to Chapter 5, “Connectors and Jumpers,” for the location of the ribbon cable connections on the system board.

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4.8.1 5.25-Inch Drive

CAUTION: All removable media should be taken out of the drives before removing the drive from

the computer.

1. Prepare the computer for disassembly (Section 4.2).

2. Remove the computer cover (Section 4.6).

3. Rotate the drive cage to the upright position.

4. Rotate the power supply to the upright position.

5. Disconnect the audio, signal and drive power cables. The other end of the audio cable

should remain connected to the audio connector on the system board.

6. Pull the drive release latch away from the drive

7. Slide the drive toward the front of the drive cage

computer

2, then lift the drive out of the

To replace the drive, reverse the removal procedures.

✎

When replacing the drive, transfer the four screws from the old drive to the new one. The screws take the place of drive rails.

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4.8.2 Diskette Drive

1. Prepare the computer for disassembly (Section 4.2).

2. Remove the computer cover (Section 4.6).

3. Remove the 5.25-inch drive (Section 4.8.1).

4. Disconnect the power and data cables from the back of the drive

5. Pull the drive release latch away from the drive

6. Lift the drive from the drive cage by first pulling the drive toward the back of the

2, then lifting the drive up and out of the drive cage 3.

cage

✎

The guide screws on the sides of the drive must be guided along the J-slots to remove the drive from the drive cage.

To replace the drive, reverse the removal procedures.

✎

4-12 Removal & Replacement Procedures

When replacing the drive, transfer the four screws from the old drive to the new one. The screws take the place of drive rails.

CAUTION: When servicing the computer, ensure that cables are placed in their proper locations during the reassembly process. Improper cable placement can damage the computer.

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4.8.3 Hard Drive

1. Prepare the computer for disassembly (Section 4.2).

2. Remove the computer cover (Section 4.6).

3. Push the drive release latch away from the drive.

4. Slide the drive toward the rear of the drive cage, then lift the drive from the computer.

5. Disconnect the power and data cables from the back of the drive.

To replace the drive, reverse the removal procedures.

✎

When replacing the hard drive, transfer the four screws from the old drive to the new one. The screws take the place of drive rails.

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4.9 Data Cable Installation

The data cables must be installed in the sequence shown to prevent damage.

Diskette drive cable

Hard drive cable

CD-ROM cable

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4.10 Memory Expansion

The computer comes with synchronous dynamic random access memory (SDRAM) dual inline memory modules (DIMMs).

DIMMs

The memory sockets on the Intel 815e chipset–based system board can be populated with industry-standard DIMMs. These memory module slots are populated with at least one preinstalled memory module. To achieve the maximum memory support, you may be required to replace the preinstalled DIMM with a higher capacity DIMM.

For proper system operation, the DIMMs must be industry-standard 168-pin, unbuffered PC100– or PC133– compliant SDRAM DIMMs, depending on the model. The SDRAM DIMMs must support CAS Latency 2 or 3 (CL = 2 or CL = 3). They must also contain the mandatory Joint Electronic Device Engineering Council (JEDEC) Serial Presence Detect (SPD) information. DIMMs constructed with x4 SDRAM (16 ICs per side) are not supported; the system will not start using unsupported DIMMs.

The Intel 815e chipset supports both PC100 and PC133 SDRAM DIMMs. PC133 DIMMs should be used for optimal operation. If both PC100 and PC133 SDRAM DIMMs are installed in a computer, the system memory will run at the lower 100Mhz speed. Some configurations of PC133 SDRAMs may run at 100Mhz, instead of 133Mhz.

Memory Module Installation

CAUTION:

memory, it is important to use memory modules with gold metal contacts to prevent corrosion and/or oxidation resulting from having incompatible metals in contact with each other.

CAUTION:

optional cards. Before beginning these procedures, ensure that you are discharged of static electricity by briefly touching a grounded metal object. Refer to Appendix F, “Electrostatic Discharge,” for more information.

CAUTION:

Doing so may damage the module.

Your memory module sockets have gold metal contacts. When upgrading your

Static electricity can damage the electronic components of the computer or

When handling a memory module, be careful not to touch any of the contacts.

1. Prepare the computer for disassembly (Section 4.2).

2. Remove the computer cover (Section 4.6).

3. Rotate the drive cage to the upright position.

CAUTION:

cage to prevent damage.

Check the position of all cables and wires before raising or lowering the drive

4. Locate the memory module sockets.

WARNING:

components to cool before touching.

To reduce risk of personal injury from hot surfaces, allow the internal system

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5. Open both latches of the memory module socket 1, and insert the memory module into the socket

6. Begin by installing a module into the socket nearest the preinstalled module, and install the modules following the numerical order of the sockets.

7. A memory module can be installed in only one way. Match the notch on the module with the tab on the memory socket. Push the module down into the socket, ensuring that the module is fully inserted and properly seated with the latches pushed in

8. Repeat step 6 for any additional modules that you want to install.

9. Replace the computer cover.

10. The computer should automatically recognize the additional memory the next time the

computer is powered on.

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4.11 Battery

The battery that comes with the computer provides power to the real-time clock and has a lifetime of about three years. When replacing the battery, use the appropriate 3-volt lithium coin-cell battery. To replace the battery:

1. Prepare the computer for disassembly (Section 4.2).

2. Remove the computer cover (Section 4.6).

3. Rotate the drive cage to the upright position.

4. Lift the battery out of its holder.

5. Slide the replacement battery into position with the “plus” side up.

The battery holder automatically secures the battery in the proper position.

6. Replace the computer cover.

7. Plug in the computer and turn on power.

8. Reset the date, time, passwords, and any special system settings using Compaq

Computer F10 Setup.

✎

If you previously saved CMOS settings to a diskette with F10 setup, you can restore these CMOS settings using F10 setup and the diskette with the saved CMOS configuration.

WARNING: This computer contains a lithium-ion battery pack. There is a risk of fire and chemical burn if the battery pack is handled improperly. Do not disassemble, crush, puncture, short external contacts, dispose in water or fire, or expose it to temperatures higher than 60ºC (140ºF).

In North America, dispose of nickel metal hydride or lithium-ion batteries by taking advantage of the Compaq battery recycling program. You will be provided with a postage-paid battery pack mailer preaddressed to a reclamation facility where the metals are recycled. Call the telephone number listed for your location in the Contacting Customer Support guide for more information.

In Europe, do not dispose of batteries with general household waste. Dispose of or recycle them by using the public collection system or returning them to Compaq, your authorized Compaq partners, or their agents.

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4.12 Speaker Assembly

1. Prepare the computer for disassembly (Section 4.2).

2. Remove the computer cover (Section 4.6).

3. Rotate the drive cage to the upright position.

4. Disconnect the speaker wire from the P6 connector on the system board

5. Remove the four nuts that connect the speaker assembly to the chassis

✎

6. Remove the speaker assembly

Use a 5/16-inch socket to remove the nuts from the speaker assembly.

To replace the speaker assembly, reverse the removal procedures.

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4.13 Front Bezel

1. Prepare the computer for disassembly (Section 4.2).

2. Remove the computer cover (Section 4.6).

3. Lay the cover on its back on a protected surface.

4. Remove the five screws that connect the front bezel to the computer cover.

✎

5. Remove the bezel from the computer cover.

To replace the bezel, reverse the removal procedures.

When removing the screws, the computer cover release latches will also come loose.

✎

When replacing the front bezel, be sure to also replace the grounding straps.

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4.14 Expansion Card Cage Components

4.14.1 Expansion Card Cage

1. Prepare the computer for disassembly (Section 4.2).

2. Remove the computer cover (Section 4.6).

3. Pull the expansion card cage straight up to remove it from the chassis.

To replace the expansion card cage, reverse the removal procedures.

✎

When reinstalling the expansion card cage, ensure that the tab on the brace latches into the slot on the side of the power supply.

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4.14.2 Expansion Card

1. Prepare the computer for disassembly (Section 4.2).

2. Remove the computer cover (Section 4.6).

3. Remove the expansion card cage (Section 4.14.1).

4. Remove the retaining screw that secures the expansion card to the expansion card cage,

and remove the expansion card.

To replace an expansion card, reverse the removal procedures.

✎

The computer should automatically recognize the added Plug and Play expansion card.

✎

If you are installing an expansion card for the first time, remove the desired expansion card slot cover before installing the expansion card.

Windows NT does not have Plug and Play capability.

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4.14.3 Riser Board

1. Prepare the computer for disassembly (Section 4.2).

2. Remove the computer cover (Section 4.6).

3. Remove the expansion card cage (Section 4.14.1).

4. Remove any expansion cards (Section 4.14.2).

5. Disconnect any cables from the riser board.

6. Remove the two screws that secure the riser board to the expansion card cage

7. Slide the board down slightly so it clears the slots on the top of the expansion card

cage

8. Remove the riser board from the expansion card cage

To replace the riser board, reverse the removal procedures.

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4.15 Easy Access Power Supply

1. Prepare the computer for disassembly (Section 4.2).

2. Remove the computer cover (Section 4.6).

3. Remove the expansion card cage (Section 4.14.1).

4. Disconnect all power cables from the mass storage devices and the system board.

5. Remove the screw that secures the power supply to the back of the chassis

6. Slide the back of the power supply toward the right

the computer

2, then lift the power supply out of

To replace the power supply, reverse the removal procedures.

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4.16

I/O Panel

1. Prepare the computer for disassembly (Section 4.2).

2. Remove the computer cover (Section 4.6).

3. Remove the expansion card cage (Section 4.14.1).

4. Rotate the power supply to the upright position.

5. Unplug the I/O panel cable from the system board

6. Press the green release tab on the end of the I/O panel

7. Swing the I/O panel away from the computer

8. Remove the panel from the chassis

3 until it is at a 90 degree angle.

To replace the I/O panel, reverse the removal procedures.

4-24 Removal & Replacement Procedures

Page 57

4.17 System Board

✎

More information on the system board, including troubleshooting criteria, can be found in the Compaq Quick Troubleshooting Guide (part number 153837-001) and the Compaq Service Reference Guide (part number 152611-001).

1. Prepare the computer for disassembly (Section 4.2).

2. Remove the computer cover (Section 4.6).

3. Remove the expansion card cage (Section 4.14.1).

4. Remove the I/O panel (Section 4.16).

5. Rotate the drive cage to the upright position.

CAUTION: Check the position of all cables and wires before raising or lowering the drive cage to prevent cable damage.

6. Rotate the power supply to the upright position.

7. Disconnect all cables from the system board.

8. Slide system board toward the rear of computer until the six metal standoffs that extend

up from the base pan are positioned in the larger part of the keyhole slots in the system

board

9. Raise the rear of the system board until it is at a 30 degree angle

10. Remove the system board by pulling it toward the rear of the computer, then lifting it up and out of the chassis

To replace the system board, reverse the removal procedures.

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4.18 Front Trim

The front trim is the removable plastic piece located below the front bezel.

1. Prepare the computer for disassembly (Section 4.2).

2. Remove the computer cover (Section 4.6).

3. Remove the I/O panel (Section 4.16).

4. Rotate the drive cage to the upright position.

5. Slide the system board back until the six metal standoffs that extend up from the base

pan are positioned in the larger part of the keyhole slots in the system board

✎

trim.

6. Press the left tab that connects the front trim to the chassis

7. Press the right tab that connects the front trim to the chassis

It is not necessary to remove the system board from the computer to remove the front

8. Remove the front trim from the computer

To replace the front trim, reverse the removal procedures.

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4.19 Processors

4.19.1 Type 1 Processor Assembly

1. Prepare the computer for disassembly (Section 4.2).

2. Remove the computer cover (Section 4.6).

CAUTION: To reduce the risk of personal injury from hot surfaces, allow the internal system components to cool before touching.

3. Remove the expansion card cage (Section 4.14.1).

4. Rotate the drive cage to the upright position.

CAUTION: Check the position of all cables and wires before raising or lowering the drive cage to prevent cable damage.

5. Unplug the fansink wire from the system board 1.

6. Remove the heatsink retaining clip

2 by pressing down on the clip’s extended tab until

it releases from the safety catch.

7. Release the processor from the socket by pulling the handle on the ZIF socket out and upward

8. Lift the processor out of the socket

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Before installing a fansink, prepare for its installation by doing one of the following:

• New heatsink: if the heatsink has a thermal interface attached to its bottom, peel off

the protective paper before installing the heatsink.

• Reinstalled heatsink: Note where the thermal interface is located on the heatsink.

To replace the fansink, reverse the removal procedures.

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4.19.2 Type 2 Processor Assembly

1. Prepare the computer for disassembly (Section 4.2).

2. Remove the computer cover (Section 4.6).

CAUTION: To reduce the risk of personal injury from hot surfaces, allow the internal system components to cool before touching.

3. Remove the expansion card cage (Section 4.14.1).

4. Rotate the drive cage to the upright position.

CAUTION: Check the position of all cables and wires before raising or lowering the drive cage to prevent cable damage.

5. Unplug the fansink wire from the system board 1.

6. Press the tab down and inward toward the heatsink to release the metal clip on the

bottom of the tab from the plastic retainer on the processor socket

7. Release the processor from the socket by pulling the handle on the ZIF socket out and upward

8. Lift the processor out of the socket

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Before installing a fansink, prepare for its installation by doing one of the following:

• New heatsink: if the heatsink has a thermal interface attached to its bottom, peel off

the protective paper before installing the heatsink.

• Reinstalled heatsink: Note where the thermal interface is located on the heatsink.

CAUTION: Thermal interface heat transmission is reduced if residue remains on the heatsink or the heatsink thermal interface surface is scratched. This could lead to the processor running at a higher than normal temperature, fan turning at a higher than normal speed, and possible loss of data if processor shuts down from overheating. Installing the Type 2 fansink assembly backwards will cause the processor to overheat, since the round aluminum core will only make partial contact with the processor die.

To replace the fansink, reverse the removal procedures.

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chapter

ONNECTORS AND JUMPERS

This chapter provides connector and jumper information for system board jumpers, system I/O board connectors, riser board connectors and jumpers, and hard drives for the Small Form Factor models.

5.1 System Board

5.1.1 Connectors and Jumpers - System Board 187499-001

CR508 3.3V Aux LED P20 Primary IDE Connector

CR570 5V Aux (ON)/PS_ON_ (OFF) LED P21 Secondary IDE Connector

E49 Clear Password Header (Installed =

Enabled, Removed = Cleared)

J30 Riser Board P200 Hood Lock Solenoid Connector

P1 Power Supply Connector SW50 Clear CMOS

P6 Speaker Connector XBT1 External Battery

P7 CD-ROM Audio XMM1-3 DIMM Memory Slots

P10 Diskette Drive Connector XU1 Processor Socket

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P70 CPU Fan Connector

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5.1.2 Connectors and Jumpers - System Board 187500-001

CR508 3.3V Aux LED P20 Primary IDE Connector

CR570 5V Aux (ON)/PS_ON_ (OFF) LED P21 Secondary IDE Connector

E49 Clear Password Header (Installed =

Enabled, Removed = Cleared)

J30 Riser Board Connector P200 Hood Lock Solenoid Connector

P1 Power Supply Connector SW50 Clear CMOS

P6 Speaker Connector XBT1 External Battery

P7 CD-ROM Audio Connector XMM1-3 DIMM Memory Slots

P10 Diskette Drive Connector XU1 Processor Socket

P70 CPU Fan Connector

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5.1.3 Clearing CMOS

The computer's configuration (CMOS) may occasionally be corrupted. If it does, it is necessary to clear the CMOS memory using switch SW50.

To clear and reset the configuration, perform the following procedure:

1. Prepare the computer for disassembly (Section 4.2).

CAUTION:

jumpers. All LEDs on the system board should be off. Failure to do so may damage the system board.

The power cord must be disconnected from the power source before changing the

2. Remove the computer cover (Section 4.6).

3. Press the CMOS button located on the system board and keep it depressed for

5 seconds.

4. Replace the computer cover.

5. Turn the computer on.

6. Run the Computer Setup utility to reconfigure the system.

When the jumper is removed, both the power-on password and the setup password become invalid because both are stored in the configuration memory. You will need to reset the passwords.

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5.1.4 Disabling or Clearing the Power-On and Setup Passwords

1. Turn off the computer and any external devices, and disconnect the power cord from the power outlet.

2. Disconnect the keyboard, monitor, and any other external devices connected to the computer.

3. Remove the access panel.

4. Locate the header and jumper labeled E49.

5. Remove the jumper from pins 1 and 2. Place the jumper over pin 2 only, in order to

avoid losing it.

6. Replace the access panel.

7. Reconnect the external equipment.

8. Plug in the computer and turn on power. Allow the operating system to start. This clears

the current passwords and disables the password features.

9. To re-enable the password features, repeat steps 1-4, then replace th e jump er on pins 1 and 2.

10. Repeat steps 6-8, then establish new passwords.

Refer to the Computer Setup (F10 Setup) instructions to establish new passwords.

5-4 Connectors and Jumpers

Page 67

5.1.5 CMOS Archive and Restore (Power Switch Override)

Each time the system starts, the system ROM saves a copy of NVRAM (including CMOS, passwords, and other system variables) in the flash ROM. Should the system become unstable, the last known good copy of NVRAM can be restored using a feature called “power button override.” To restore NVRAM, do the following:

1. With the unit powered down, press and release the power button.

2. Immediately after pressing the power button (during POST), press and hold the power

button until the unit powers down (about 4 seconds).

At the next startup, the ROM detects this “power button override” event and the backup copy of NVRAM is restored.

Because of this feature, users cannot power off the computer immediately after powering up. The video display must be active before the computer can be powered off.

CAUTION:

ROM is required to restore the splash screen, although the computer will continue to function.

Unplugging the power cord during POST can corrupt the splash screen. Flashing the

Compaq Deskpro EN Series of Personal Computers 5-5

Page 68

5.2 Riser Board – Connectors and Jumpers

J20 PCI Slot P12 NIC SOS connector

J21 PCI Slot P29 SCSI LED connector

J22 PCI Slot SW1 Security Hood Switch

P7 CD Audio connector

5-6 Connectors and Jumpers

Page 69

5.3 Hard Drive Jumper Settings

5.3.1 Seagate, Fujitsu, and Western Digital

The drawings and tables below apply to a number of different size drives in the following paragraphs.

Seagate, Fujitsu, and Western Digital

Ultra ATA Hard Drive Jumper Settings

Definition Seagate Fujitsu Western Digital

Single 7 - 8 1 - 2 and 3 - 5 3 - 5

Primary 5 - 6 and 7 - 8 1 - 2 and 3 - 5 5 - 6

Secondary No connection 3 - 5 3 - 4

Cable Select 5 - 6 2 - 4 and 3 - 5 1 - 2

Compaq Deskpro EN Series of Personal Computers 5-7

Page 70

5.3.2 Maxtor

Maxtor Ultra ATA Hard Drive Jumper Settings

Definition J50 J48 J46 J44 J42

Single J

Primary (in a dual-drive system) J

Secondary O

Cable Select

Disabled* Enabled

O J

4092 Cylinder Limitation

Disabled* Enabled

Factory Reserved O

* = Default setting J = Jumper O = No jumper

O J

5-8 Connectors and Jumpers

Page 71

chapter

PECIFICATIONS

This chapter provides physical, environmental, and performance specifications for the computer, keyboard, and mass storage devices.

6.1 System

6.1.1 Specifications

Desktop Dimensions

Height Width Depth

Approximate Weight 20 lb 9.1 kg

Weight Supported (maximum distributed load) 100.0 lb 45.5 kg

Temperature Range

Operating Nonoperating

Relative Humidity (noncondensing)

Operating Nonoperating

Maximum Altitude (unpressurized)

Operating Nonoperating

Power Supply

Operating Voltage Range Rated Voltage Range Rated Line Frequency

Power Output 120 W 120 W

Rated Input Current (maximum) 4 A 2 A

Heat Dissipation

Maximum Nominal

3.8 in

12.5 in

14.6 in

50° to 95°F

-4° to 140°F

8-90% 5-95%

10,000 ft 30,000 ft

90-132 VAC 100-127 VAC 50-60 Hz

630 Btu/hr 315 Btu/hr

9.7 cm

31.8 cm

37.1 cm

10° to 35°C

-20° to 60°C

8-90% 5-95%

3048 m 9144 m

180-264 VAC 200-240 VAC 50-60 Hz

160 kg-cal/hr 80 kg-cal/hr

Compaq Deskpro EN Series of Personal Computers 6-1

Page 72

6.1.2 System Interrupts

Hardware IRQ System Function

0 Timer Interrupt

1 Keyboard

2 Interrupt Controller Cascade

3 Serial Port (COM B)

4 Serial Port (COM A)

5 Unused, available for PCI

6 Diskette Drive

7 Parallel Port (LPT 1)

8 Real-Time Clock

9 Unused

10 Unused, available for PCI

11 Unused, available for PCI

12 Mouse

13 Coprocessor

14 IDE Interface Hard Drive

15 CD-ROM

6.1.3 System DMA

Hardware DMA System Function

0 Unused

1 Unused

2 Diskette Drive

3 ECP Parallel Port LPT1 (Default; Alternate = DMA 0)

4 DMA Controller Cascading

5 Unused

6 Unused

7 Unused

6-2 Specifications

Page 73

6.1.4 ICH Fixed I/O Registers

Port Register Name

00h, 02h, 04h, 06h Channel 0, 1, 2, 3 DMA Base & Current Address Regsiter

C0h, C4h, C8h, CCh Channel 4, 5, 6, 7 DMA Base & Current Address Register

01h, 03h, 05h, 07h Channel 0, 1, 2, 3 DMA Base & Current Count Register

C2h, C6h, Cah, CEh Channel 4, 5, 6, 7 DMA Base & Current Count Register

10h-1Fh

20h Master PIC ICW1 Init. Cmd Word 1 Register

21h Master PIC ICW2 Init. Cmd Word 1 Register

24h-25h, 28-29h, 2Ch-2Dh, 30h-31h, 34h-35h, 38h-39h, 3Ch-3Dh

40h Counter 0 Interval Time Status Byte Format

41h Counter 1 Interval Time Status Byte Format

42h Counter 2 Interval Time Status Byte Format

43h

50h-53h

61h NMI Status and Control Register

70h NMI Enable Register

71h Real-Time Clock (Standard RAM) Target Register

72h Extended RAM Index Register

73h Extended RAM Target Register

74h-75h

76h-77h

81h, 82h, 83h Channel 2, 3, 1 DMA Memory Low Page Register

84h-86h, 88h Reserved Page Registers

89h, 8Ah, 8Bh Channel 6, 7, 5 DMA Memory Low Page Register

8CH-8Eh Reserved Page Registers

8Fh Refresh Low Page Register

91h-9Fh (except 92h)

92h Fast A20 and INIT Register

CF9h Reset Control Register

Aliased at 00h-0Fh

Master PIC OCW2 Op Ctrl Word 2 Register

Master PIC OCW3 Op Ctrl Word 3 Register

Master PIC ICW3 Init. Cmd Word 1 Register

Master PIC ICW4 Init. Cmd Word 1 Register

Master PIC OCW1 Op Ctrl Word 3 Register

Aliased at 20h-21h

Counter 0 Counter Access Port Register

Counter 1 Counter Access Port Register

Counter 2 Counter Access Port Register

Timer Control Word Register Timer Control Word Register Read Back Counter Latch Command

Aliased at 40h-43h

Real-Time Clock (Standard RAM) Index Register

Aliased at 70h-71h

Aliased at 72h-73h or 70h-71h

Aliased at 81h-8Fh

continued

Compaq Deskpro EN Series of Personal Computers 6-3

Page 74

ICH Fixed I/O Registers cont.

Port Register Name

A0h Slave PIC ICW1 Init. Cmd Word 1 Register

Slave PIC OCW2 Op Ctrl Word 2 Register

Slave PIC OCW3 Op Ctrl Word 3 Register

A1 Slave PIC ICW2 Init. Cmd Word 2 Register

Slave PIC ICW3 Init. Cmd Word 3 Register

Slave PIC ICW4 Init. Cmd Word 4 Register

Slave PIC OCW1 Op Ctrl Word 1 Register

A4h-A5h, A8h-A8h, ACh-ADh, B0h-B1h, B4h-B5h, B8h-B9h, BCh-BDh

B2h Advanced Power Management Control Port Register

B3h Advanced Power Management Status Port Register

C0h, C4h, C8h, CCh Channel 4, 5, 6, 7 DMA Base and Current Address Register

C1h

C5h

C9h

CDh

C2h, C6h, CAh, CEh Channel 4, 5, 6, 7 DMA Base and Current Count Register

C3h

C7h

CBh

CFh

D0h Channel 4-7 DMA Command Register

D1h

D4h Channel 4-7 DMA Write Single Mask Register

D5h

D6h Channel 4-7 DMA Channel Mode Register

D7h

D8h Channel 4-7 DMA Clear Byte Pointer Register

D9h

DAh Channel 4-7 DMA Master Clear Register

DBh

DCh Channel 4-7 DMA Clear Mask Register

DEh

DEh Channel 4-7 DMA Write All Mask Register

DFh

F0h Coprocessor Error Register

170h-177h PIO Mode Command Block Offset for Secondary Drive

1F0h-1F7h PIO Mode Command Block Offset for Primary Drive

376h PIO Mode Control Block Offset for Secondary Drive

Aliased at A0h-A1h

Aliased at C0h

Aliased at C4h

Aliased at C8h

Aliased at CCh

Aliased at C2h

Aliased at C6h

Aliased at CAh

Aliased at Ceh

Channel 4-7 DMA Status Register

Aliased at D0h

Aliased at D4h

Aliased at D6h

Aliased at D8h

Aliased at DAh

Aliased at DCh

Aliased at DEh

continued

6-4 Specifications

Page 75

ICH Fixed I/O Registers cont.

Port Register Name

3F6h PIO Mode Control Block Offset for Primary Drive

4D0h Master PIC Edge/Level Triggered Register

3F6h PIO Mode Control Block Offset for Primary Drive

4D0h Master PIC Edge/Level Triggered Register

4D1h Slave PIC Edge/Level Triggered Register

400-47F Super I/O

F800-F87F Reserved (power management)

FA00-FA3F Reserved (GPIO management)

FC00-FC0F Reserved (SMBUS controller)

NOTE: When the POS_DEC_EN bit is set, additional I/O ports get positively decoded by the ICH.

6.1.5 System Memory Map

Size Memory Address System Function

512 KB FFFFFFFFh to FFF80000 System ROM

3839 MB FFFBFFFFh to 10000000h PCI Memory Expansion

511 MB 0FFFFFFFh to 00100000h HOST or PCI Memory Expansion

128KB 000FFFFFh to 000E0000h System ROM

96 KB 000DFFFFh to 000C8000h PCI Option ROMs

32 KB 000C7FFFh to 000C0000h Video ROM

128 KB 000BFFFFh to 000A0000h Video RAM

640 KB 0009FFFFh to 00000000h Base Memory

Compaq Deskpro EN Series of Personal Computers 6-5

Page 76

6.2 Drives

6.2.1 Diskette Drive

Size and Capacity

Size (in) High Density (MB) Low Density (KB)

3.5

1.44 720

Compaq Spare Part Number

Light

Height (inches)

Bytes per Sector

Sectors per Track

High Density Low Density

Tracks per Side

High Density Low Density

Read/Write Heads

Average Seek Time (m/s)

Track-to-Track (high/low) Average (high/low) Latency Average (ms)

191714-001

Green

512

18 9

80 80

3/6 94/173 100

6-6 Specifications

Page 77

6.2.2 Ultra ATA Hard Drives

Formatted Capacity

Physical (MB) Logical (MB)

10.0 GB 15.0 GB 20.0 GB

10005 Not available

15020 8455

20020 8455

Compaq Spare Part Number

Total Logical Sectors

Logical Geometry

Cylinders Heads Sectors

Physical Geometry

Cylinders Heads Sectors

Data Bytes/Sector

Sector Interleave

ECC Bytes

Recording MethodEPR4

Spin-Up Time (maximum)

Spin-Down Time (maximum)

Seek Times, Logical

(Busy to Seek Complete)

Track-to-Track Average (Read) Full Stroke

135364-001 192060-001 157403-001

19541088 29336832 39102336

16383 16 63

15011 8 214-312

512 512 512

1:1 1:1 1:1

PRML 48/51 PRML PRML

TYP MAX 18 sec 31 sec

Not available 10 seconds Not available

TYP MAX

1.7ms 2.4ms

8.5 ms 9.5ms 15ms 18ms

16383 16 63

24453 3 312-494 (20 zones)

18 bytes ON-THE-FLY 33 bytes FIRMWARE

9 seconds TYP

MAX TYP

5.0ms 2.0ms

15.0ms 9.5ms

25.0ms 21.0ms

16383 16 63

17494 6 270-450 (20 zones)

12 bytes ON-THE-FLY 34 bytes FIRMWARE

18 sec

MAX TYP

2.4ms 1.7ms

9.5m s 8.5ms

18.0ms 15.0ms

Average Latency

Data Transfer Rate @Disk to Buffer @Interface w/o IORDY

PIO DMA UDMA

RPM

5.56ms 4.17ms 4.17ms

139.61  224.31 MB/s

16.6 MB/s

66.6 MB/s

7200+/-0.1% 7200+/-0.1% 7200+/- 0.1%

Compaq Deskpro EN Series of Personal Computers 6-7

189.0 - 304.3 Mbits/s

12.5 MB/s

up to 16.6 MB/s up to 33.3 MB/s up to 66.6 MB/s

171-284 Mbits/s Max

16.6 MB/s

66.6 MB/s

Page 78

6.2.3 CD-ROM Drive

Compaq Spare Part Number

48X Max

187263-001

Data Buffer (ms)

Data Transfer Rate

Access Time (ms)

Random Full-Stroke Seek

Cache Buffer

Interface

Disk Formats Read

Disk

Capacity

Block Size

Diameter

Thickness

Track Pitch

16.6

150 KB/s Min (audio) CD: 3000-7200 KB/s

<100 <150

128 KB

ATAPI

Photo-CD/Multisession CD-ROM Multi Read CD TEXT Audio CD CD-I CD-RW CD-R CD EXTRA CD-ROM XA

CD: 650 MB

Mode 1  2048 bytes Mode 2  2340, 2336 bytes CD-DA  2353 bytes CD-XA  2328 bytes

12 cm;8 cm

1.2 mm

1.6 um

Audio Output Level

Line Out Headphone

Startup Time

Operating Conditions

Temperature Humidity

Dimensions (mm) (HxWxD)

Weight (grams)

MPEG Playback Graphics Solution Support

6-8 Specifications

0.7 V @ 47 K ohm

0.6 V @ 32 ohm

<7 sec (typical); <30 sec with multisession

5  45 C 10-80% relative humidity

42.9x150.1x208

1200

None

Page 79

6.3 Keyboards

Dimensions

Height Width Depth

6.4 Mouse

Dimensions

Height Length Width

Compaq Easy Access Compaq Enhanced Compaq Smart Card

1.4 in

18.3 in

6.3 in

1.48 in

4.76 in

2.44 in

1.4 in

18.3 in

6.3 in

1.4 in

18.3 in

6.3 in

3.75 cm

12.1 cm

6.2 cm

Weight

Base Resolution

Tracking Speed

Temperature

Operating Non-operating

Lifetime

Relative Humidity

Operating Non-operating

ESD

(maximum)

4.6 oz 131 g

400 dpi 400 dpi

10 in/sec 25 cm/sec

50°F to 104°F

-4°F to 140°F

3 million operations 3 million operations

10% to 90%, noncondensing 10% to 90%, noncondensing

No soft error up to 10kV No hard error up to 15kV

0°C to 40°C

-20°C to 60°C

10% to 90%, noncondensing 10% to 90%, noncondensing

Compaq Deskpro EN Series of Personal Computers 6-9

Page 80

6.5 Supported Graphics Resolutions

6.5.1 Intel 3D Graphics (system board 187500-001)

Colors 256 65K 16.7M

640 x 480

800 x 600

1024 x 768

1152 x 864

1280 x 1024

1600 x 1200

85 Hz 85 Hz 85 Hz

6.5.2 nVIDIA TNT 3D AGP (system board 187499-001)

Colors 256 65K 16.7M

640 x 480

800 x 600

1024 x 768

1280 x 1024

1600 x 1200

1800 x 1440

120 Hz 120 Hz 120 Hz

85 Hz 85 Hz 85 Hz

72 Hz

6-10 Specifications

Page 81

chapter

ERVICE NOTES

CAUTION:

under the keys.

1. The processor chip is mounted upside down on a board. The heatsink mounts directly to the back of the chip. The chip is in the center of the processor package, but the processor is offset in the system board socket because of the hinge for the lever arm. The heatsink and clip must be properly aligned so that the clip pushes the heatsink flat against the chip.

If the heatsink is mounted improperly, the processor runs at a higher-than-normal

temperature and the computer posts an immediate processor failure message (before the computer completes Power-On Self Test [POST]). If the Compaq DMI software is installed, the user receives a warning about any elevated temperature in the processor.

2. Unplug the power cord before installing or removing any PCI boards since the PCI slots have auxiliary power applied. If the power cord is not unplugged, damage to the boards can occur.

3. Each time the system starts, the system ROM saves a copy of NVRAM (including CMOS, passwords, and other system variables) in the flash ROM. Should the system become unstable, the last known good copy of NVRAM can be restored using a feature called “power button override.” To restore NVRAM, do the following:

With the unit powered down, press and release the power button.

Immediately after pressing the power button (during POST), press and hold the power button until the unit powers down (about 4 seconds).

Use safety glasses equipped with side shields before attempting to clean debris from

At the next startup, the ROM detects this “power button override” event and the backup copy of NVRAM is restored.

Because of this feature, users cannot power off the computer immediately after powering up. The video display must be active before the computer can be powered off.

4. The following setup is required for system memory to run at 133 MHz: A 133-MHz front-side bus processor must be installed

All installed DIMMs must be PC133

No more than four loads on the data lines (four sides of SDRAM)

In all other cases, the system BIOS downshifts the memory to 100 MHz.

Compaq Deskpro EN Series of Personal Computers 7-1

Page 82

5. The major core BIOS for the Deskpro EN is significantly changed from previous versions. Some of the key changes include:

unique system ROM for models with integrated Intel graphics and models with integrated NVIDIA graphics

detailed F10 Setup help text via the F1 key

enhanced storage support from F10 Setup, including:

detailed device viewing information

choice of booting to IDE or SCSI hard drives

execution of IDE DPS self test

support for LS-120 and ZIP drive booting (without a 1.44-MB diskette drive

increased maximum drive capacity from 64 GB to 2 terabytes

SCSI SMART failure support

adjustment of configurable device parameters, including:

− translation mode options: bit shift (default), LBA assisted, user (must specify

desired geometry), and none (hard disk defaults used). Two “industry standard” translations inhibits “connect-and-go” access to hard disk data

− emulation type option, which allows users to force the BIOS to treat the

device as the specified device type For an LS-120 and ATAPI ZIP drive, emulation modes include:

1. diskette (ZIP drive only; to boot as A:/ drive)

2. hard disk

3. none The device’s native type is always “none”. For the Zip drive, none means “other” device type: for the LS-120 drive, none means “diskette” device type.

new F10 Setup device information

service password that allows for back-door, power-on capability in the event a password is forgotten

advanced interrupt controller (APIC) that provides more interrupt requests (IRQs) for PCI IRQ mapping (this feature can be disabled in F10 Setup)

10-second POST time (may vary with slower storage devices or removable

media) master boot record (MBR) security, which provides recovery from malicious

or accidental damage to the boot disk’s MBR notifies user during POST if the boot disk or its MBR has changed

changes to either the boot disk or the MBR require:

saving a new MBR image

disabling MBR security

restoring the backup MBR to the disk (unless the boot disk has changed)

some administrative uti li ties (l ike fdi sk) caus e change s to the MBR that are detected in the next reboot

7-2 Service Notes

Page 83

Index

activity light

CD-ROM drive, 1-2 diskette drive, 1-2

audio

connectors and jacks, 1-2

battery

proper disposal, 4-17 removal and replacement, 4-17

bezel blank

part number. See also

miscellaneous plastics kit

removal and replacement, 4-9

cable installation, 4-14 cable lock

model number, 4-7 removal and replacement, 4-7

CD-ROM

drive positions, 1-4, 4-10

CD-ROM drive

removal and replacement, 4-11 spare part number, 2-2 specifications, 6-8

cleaning

computer, 3-4 keyboard, 3-4 monitor, 3-4 mouse, 3-5

CMOS

archive and restore, 5-5 clearing, 5-3

computer

cleaning, 3-4

computer cover

removal and replacement, 4-8

connector

audio line-in, 1-3 audio line-out, 1-3 keyboard, 1-3 monitor, 1-3 mouse, 1-3

parallel, 1-3 power cord, 1-3 RJ-45, 1-3 serial, 1-3 USB, 1-3

connectors and jumpers

riser board, 5-6 system board, 5-1, 5-2

cover

key, 4-4

DIMMs, 4-15 disassembly

preparation, 4-3 sequence chart, 4-2

diskette drive

activity light, 1-2 drive positions, 1-4, 4-10 eject button, 1-2 removal and replacement, 4-12 spare part number, 2-2 specifications, 6-6

DMA settings and specifications,

6-2

documentation

list of available, viii, 1-6 spare part number, 2-8

drive

positions, CD-ROM, 1-4, 4-10 positions, diskette drive, 1-4 positions, hard drive, 1-4

drive positions

diskette drive, 1-4, 4-10 hard drive, 1-4, 4-10

drives

removal and replacement, 4-10 spare part number, 2-2

eject button

diskette drive, 1-2 electrostatic discharge (ESD), 3-1 Ethernet RJ-45 connector, 1-3 expansion card

removal and replacement, 4-21 expansion card cage

removal and replacement, 4-20

feet

part number. See also

miscellaneous plastics kit

removal and replacement, 4-6 front bezel

removal and replacement, 4-19 front trim

removal and replacement, 4-26

graphics

specifications, 6-10 grounding methods, 3-2

hard drive

drive position, 1-4, 4-10

jumpers, 5-7

proper handling, 3-6

removal and replacement, 4-13

spare part number, 2-2

specifications, 6-7 headphone jack, 1-2

jumpers

hard drive, 5-7

system board, 5-1, 5-2

Index I-1

Page 84

Kensington lock, 4-7 keyboard

cleaning, 3-4 connector, 1-3 spare part number, 2-5 specifications, 6-9

lights

CD-ROM drive busy, 1-2 diskette drive activity, 1-2 drive activity, 1-2 power-on, 1-2

mass storage devices

spare part number, 2-2

memory

removal and replacement, 4-15 memory map, 6-5 microphone jack, 1-2 microprocessor. See also processor miscellaneous plastics kit

spare part number, 2-6 monitor

cleaning, 3-4 monitor connector, 1-3 mouse

cleaning, 3-5

connector, 1-3

specifications, 6-9

parallel connector, 1-3 power button, 1-2 power cord connector, 1-3 power supply

fan, 3-5

removal and replacement, 4-23 power switch override, 5-5 power-on password

disabling or clearing, 5-4 preparation for disassembly, 4-3 processor assembly, type 1

removal and replacement, 4-27 processor assembly, type 2

removal and replacement, 4-28

Quick Troubleshooting Guide

spare part number, 2-8, 4-25

removal and replacement

5.25-inch drive, 4-11 battery, 4-17 bezel blank, 4-9 cable lock, 4-7 computer cover, 4-8 diskette drive, 4-12 drives, 4-10 expansion card, 4-21 expansion card cage, 4-20 feet, 4-6 front bezel, 4-19 front trim, 4-26 hard drive, 4-13 I/O panel, 4-24 memory, 4-15 power supply, 4-23 processor assembly, type 1,

4-27

processor assembly, type 2,

4-28 riser board, 4-22 speaker assembly, 4-18 system board, 4-25

required tools and software, 3-5 riser board

connectors and jumpers, 5-6 removal and replacement, 4-22

RJ-45 connector, 1-3

screws

using correct, 3-5

SDRAM, 4-15 serial connector, 1-3 serial number location, 1-5 service considerations, 3-5 Service Reference Guide

spare part number, 2-8, 4-25

setup-on password

disabling or clearing, 5-4

shipping materials

spare part number, 2-8

Smart Cover FailSafe Key, 4-4 software required, 3-5 spare part number

CD-ROM drive, 2-2

diskette drive, 2-2 documentation, 2-8 drives, 2-2 hard drive, 2-2 keyboards, 2-5 memory, 2-4 miscellaneous plastics kit, 2-6 Quick Troubleshooting Guide,

2-8, 4-25

Service Reference Guide, 2-8,

4-25 shipping materials, 2-8 tamper resistant wrench, 2-7,

4-4

speaker assembly

removal and replacement, 4-18

specifications

CD-ROM drive, 6-8 diskette drive, 6-6 DMA settings, 6-2 graphics, 6-10 hard drive, 6-7 I/O registers, 6-3 IRQ settings, 6-2 keyboard, 6-9 memory map, 6-5 mouse, 6-9 system, 6-1

system board

connectors and jumpers, 5-1,

5-2 removal and replacement, 4-25

system interrupts, 6-2 system specifications

DMA settings, 6-2 I/O registers, 6-3 IRQ settings, 6-2 memory map, 6-5

tamper resistant wrench

spare part number, 2-7, 4-4

tools required, 3-5

unlocking Smart Cover Lock, 4-4 USB connector, 1-3

voltage select switch, 1-3

I-2 Index

Page 85

201844-001

201579-002

Compaq 201579-002 Maintenance & Service Guide

Specifications and Main Features

Frequently Asked Questions

User Manual