Lenovo ThinkCentre A55 8705 Manuel de la liste des pièces

Hardware Replacement Guide

Ty pe s 9300, 9301, 9636, 9638, 9640

Ty pe s 9641, 9642, 9643, 9644, 9645

Hardware Replacement Guide

Ty pe s 9300, 9301, 9636, 9638, 9640

Ty pe s 9641, 9642, 9643, 9644, 9645

Third Edition (April 2007)

©Copyright Lenovo 2005, 2007.

Portions ©Copyright International Business Machines Corporation 2005.

U.S. GOVERNMENT USERS –RESTRICTED RIGHTS: Our products and/or services are provided with

RESTRICTED RIGHTS. Use, duplication or disclosure by the Government is subject to the GSA ADP Schedule

contract with Lenovo Group Limited, if any, or the standard terms of this commercial license, or if the agency is

unable to accept this Program under these terms, then we provide this Program under the provisions set forth in

Commercial Computer Software–Restricted Rights at FAR 52.227-19, when applicable, or under Rights in

Data-General, FAR 52.227.14 (Alternate III).

Contents

Overview ..............v

Safety information ............v

Additional information resources .......v

Tools required .............vi

Handling static-sensitive devices .......vi

Chapter 1. Locations .........1

Locating components ...........1

Locating controls and connectors on the front of your

computer ...............2

Locating connectors on the rear of your computer ..3

Identifying parts on the system board ......4

Chapter 2. Replacing hardware.....5

Opening the cover ............5

Replacing the power supply assembly ......6

Replacing the system board .........8

Replacing the heat sink ..........14

Replacing ahard disk drive .........15

Replacing an optical drive .........18

Replacing the diskette drive .........20

Replacing amemory module ........21

Replacing aPCI adapter ..........23

Replacing the fan assembly .........25

Replacing the internal speaker ........27

Replacing the keyboard ..........29

Replacing the mouse ...........29

Completing the parts replacement .......30

Updating (flashing) BIOS from adiskette or

CD-ROM ...............31

Appendix. Notices..........33

Television output notice ..........34

Trademarks ..............34

©Lenovo 2005, 2007. Portions ©IBM Corp. 2005. iii

iv Hardware Replacement Guide

Overview

This guide is intended to be used by customers who are replacing Customer

Replaceable Units (CRUs) as well as trained service personnel who are replacing

Field Replacement Units (FRUs). In this guide, CRUs will often be referred to as

parts.

This guide does not include procedures for all parts. It is expected that cables,

switches, and certain mechanical parts can be replaced by trained service personnel

without the need for step-by-step procedures.

Note: Use only the parts provided by Lenovo

™

This guide contains instructions for replacing the following parts:

vPower supply

vSystem board

vHeat sink

vHard disk drive

vOptical drive

vDiskette drive

vMemory modules

vPCI adapter

vFan assembly

vInternal speaker

vKeyboard

vMouse

Safety information

Do not open your computer or attempt any repair before reading the “Important

safety information” in the Safety and Warranty Guide that was included with your

computer. If you no longer have this copy of the Safety and Warranty Guide,you

can obtain one online from the Support Web site at

http://www.lenovo.com/support.

Additional information resources

If you have Internet access, the most up-to-date information for your computer is

available from the World Wide Web.

You can find the following information:

vCRU removal and installation information

vCRU removal and installation videos

vPublications

vTroubleshooting information

vParts information

vDownloads and drivers

vLinks to other useful sources of information

©Lenovo 2005, 2007. Portions ©IBM Corp. 2005. v

vSupport phone list

To access this information, point your browser to:

http://www.lenovo.com/support

Tools required

To replace some parts in your computer, you might need aflat-blade or Phillips

screwdriver. Additional tools might be needed for certain parts.

Handling static-sensitive devices

Static electricity, although harmless to you, can seriously damage computer

components and parts.

When you are replacing apart, do not open the static-protective package

containing the new part until the defective part has been removed from the

computer and you are ready to install the new part.

When you handle parts and other computer components, take these precautions to

avoid static-electricity damage:

vLimit your movement. Movement can cause static electricity to build up around

you.

vAlways handle parts and other computer components carefully. Handle

adapters, memory modules, system boards, and microprocessors by the edges.

Never touch any exposed circuitry.

vPrevent others from touching the parts and other computer components.

vBefore you replace anew part, touch the static-protective package containing the

part to ametal expansion-slot cover or other unpainted metal surface on the

computer for at least two seconds. This reduces static electricity in the package

and your body.

vWhen possible, remove the new part from the static-protective packaging, and

install it directly in the computer without setting the part down. When this is

not possible, place the static-protective package that the part came in on a

smooth, level surface and place the part on it.

vDo not place the part on the computer cover or other metal surface.

vi Hardware Replacement Guide

Chapter 1. Locations

This chapter provides illustrations to help locate the various connectors, controls,

and components of the computer. To open the computer cover, see “Opening the

cover” on page 5.

Locating components

The following illustration will help you locate the various components in your

computer.

1 Diskette drive lock 7 Internal speaker

2 Microprocessor and heat sink 8 Hard disk drive

3 Memory connectors (2) 9 Optical drive (such as aCD or

DVD drive)

4 Battery 10 Optical drive lock

5 PCI riser assembly 11 Diskette drive

6 Power supply assembly

©Lenovo 2005, 2007. Portions ©IBM Corp. 2005. 1

Locating controls and connectors on the front of your computer

The following illustration shows locations of the controls and connectors on the

front of your computer.

Note: Not all computer models will have the following controls and connections.

1 Optical drive (some models) 5 USB connectors (2)

2 Hard disk drive activity indicator 6 Microphone connector

3 Power-on indicator 7 Headphone connector

4 Power button 8 Diskette drive (some models)

2Hardware Replacement Guide

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