IBM THINKPAD A20M Manual del propietario

IBM Mobile Systems

ThinkPad Computer

Hardware Maintenance Manual

October 2001

This manual supports:

ThinkPad A20m, A21m, A22m

(MT 2628/2633)

A20p, A21p, A22p

(MT 2629)

ThinkPad Dock (MT 2631)



Note

Before using this information and the product it

supports, be sure to read the general information

under “Notices” on page 150.

Second Edition (October 2001)

The following paragraph does not apply to the United

Kingdom or any country where such provisions are

inconsistent with local law:

INTERNATIONAL BUSINESS MACHINES CORPORATION

PROVIDES THIS PUBLICATION “AS IS” WITHOUT ANY

WARRANTY OF ANY KIND, EITHER EXPRESS OR

IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE

LIMITED WARRANTIES OF MERCHANTABILITY OR

FITNESS FOR A PARTICULAR PURPOSE. Some states

do not allow disclaimer or express or implied warranties in

certain transactions; therefore, this statement may not

apply to you.

This publication could include technical inaccuracies or

typographical errors. Changes are periodically made to the

information herein; these changes will be incorporated in

new editions of the publication. IBM may make

improvements or changes to the products or the programs

described in this publication at any time.

It is possible that this publication may contain references

to, or information about, IBM products (machines and

programs), programming, or services that are not

announced in your country. Such references or information

must not be construed to mean that IBM intends to

announce such IBM products, programming, or services in

your country.

Requests for technical information about IBM products

should be made to your IBM authorized dealer or your IBM

marketing representative.

US Government Users Restricted Rights – Use, duplication

or disclosure restricted by GSA ADP Schedule Contract

with IBM Corp.

About this manual

This manual contains service and reference information for

IBM ThinkPad A20, A21, A22 (MT2628, 2629, 2633), and

ThinkPad Dock (MT2631) products. Use this manual along

with the advanced diagnostic tests to troubleshoot

problems.

The manual is divided into sections as follows:

vThe common sections provide general information,

guidelines, and safety information required in servicing

computers.

vThe product-specific section includes service, reference,

and product-specific parts information.

Important

This manual is intended for trained service

personnel who are familiar with ThinkPad products.

Use this manual along with the advanced diagnostic

tests to troubleshoot problems effectively.

Before servicing an IBM ThinkPad product, be sure

to review the safety information under “Safety

notices: multilingual translations”on page 3, “Safety

information”on page 14, and “Laser compliance

statement”on page 18.

iv ThinkPad A20m/p, A21m/p, A22m/p

Contents

About this manual ...........iii

Introduction .............1

Important service information .........1

Strategy for replacing FRUs ........1

How to use error messages ........2

Diskette compatibility matrix .........2

Safety notices: multilingual translations ......3

Safety information............14

General safety............14

Electrical safety ...........15

Safety inspection guide .........16

Handling electrostatic discharge-sensitive devices 17

Grounding requirements .........18

Laser compliance statement.........18

General descriptions ..........23

Read this first .............23

What to do first ...........23

Related service information .........25

Service web site ...........25

Product recovery program ........25

Passwords .............27

Power management ..........30

Checkout guide ............33

Testing the computer ..........33

Detecting system information with PC-Doctor. . . 35

Power system checkout .........35

ThinkPad A20m/p, A21m/p and A22m/p.....39

Product overview ............41

Specifications ............41

Status indicators ...........44

FRU tests .............46

Fn key combinations ..........48

Symptom-to-FRU index ..........49

Numeric error codes ..........49

Error messages ...........52

Beep symptoms ...........53

No beep symptoms ..........53

LCD-related symptoms .........54

Intermittent problems ..........55

Undetermined problems .........55

FRU replacement notices .........56

Screw notices ............56

Retaining serial numbers.........57

Removing and replacing a FRU........59

1010 Battery pack...........60

1020 DIMM ............61

1030 Mini PCI adapter .........63

1040 Backup battery ..........66

1050 Hard-disk drive or RF ID adapter ....67

1060 Ultrabay 2000 device ........69

1070 Keyboard ...........71

1080 Keyboard CRU insulator .......74

1090 Hinge cover and clear sheet icon ....75

1100 Keyboard bezel and speaker ......76

1110 Microphone and speaker cable .....78

1120 Sub card............80

1130 PC Card slot assembly .......82

1140 Fan assembly ..........83

1150 Diskette drive ..........85

1160 Upper shield...........87

1170 TV card ............88

1180 CPU socket and CPU ........89

1190 System board and RJ45/11 connector

assembly ............91

Thermal rubbers location.........93

2010 LCD assembly ..........94

2020 Front bezel ...........96

2030 Inverter card ..........99

2040 LCD panel ...........101

3010 ThinkPad Dock PCI cover ......105

3020 ThinkPad Dock top cover ......107

Locations ..............112

Front view.............112

Rear view.............113

Bottom view ............114

Parts list ..............115

A series model matrix .........115

Overall .............123

AC adapter ............136

LCD FRUs ............136

Keyboard .............140

Recovery CDs ...........141

Miscellaneous parts ..........145

Optional FRUs ...........147

Common parts list ..........148

Notices ..............150

Trademarks ............150

vi ThinkPad A20m/p, A21m/p, A22m/p

Introduction

Important service information

Important

BIOS and device driver fixes are

customer-installable. The BIOS and device drivers

are posted on the IBM support site

http://www.ibm.com/pc/support

Advise customers to contact the PC Company

HelpCenter at 800-772-2227 if they need assistance

in obtaining or installing any diskette fixes.

Customers in Canada should call IBM HelpPC at

800-565-3344 for assistance or download

information.

Strategy for replacing FRUs

Before replacing parts

Make sure that all diskette fixes are installed before

replacing any FRUs listed in this manual.

Use the following strategy to prevent unnecessary FRU

replacement and service expense:

vIf you are instructed to replace a FRU but the

replacement does not correct the problem, reinstall

the original FRU before you continue.

vSome computers have both a processor board and a

system board. If you are instructed to replace either the

processor board or the system board, and replacing one

of them does not correct the problem, reinstall that

board, and then replace the other one.

vIf an adapter or device consists of more than one FRU,

any of the FRUs may be the cause of the error. Before

replacing the adapter or device, remove the FRUs, one

by one, to see if the symptoms change. Replace only

the FRU that changed the symptoms.

Attention: The setup configuration on the computer you

are servicing may have been customized. Running

Automatic Configuration may alter the settings. Note the

current configuration settings (using the View Configuration

option); then, when service has been completed, verify that

those settings remain in effect.

Strategy for replacing a hard-disk drive

Always try to run a low-level format before replacing a

hard-disk drive.

Attention: The drive startup sequence in the computer

you are servicing may have been changed. Be extremely

careful during write operations such as copying, saving, or

formatting. If you select an incorrect drive, data or

programs can be overwritten.

How to use error messages

Use the error codes displayed on the screen to diagnose

failures. If more than one error code is displayed, begin the

diagnosis with the first error code. Whatever causes the

first error code may also cause false error codes. If no

error code is displayed, see if the error symptom is listed

in the Symptom-to-FRU Index for the computer you are

servicing.

Diskette compatibility matrix

The compatibility of each of the drives with the diskettes

for it is as follows:

Diskette

drive Diskette

capacity Compatibility

3.5-inch 1.0 MB Read and write

2.0 MB Read and write

4.0 MB Not compatible

Important service information

2ThinkPad A20m/p, A21m/p, A22m/p

Safety notices: multilingual translations

In this manual, safety notices appear in English with a

page number reference to the appropriate multi-lingual,

translated safety notice found in this section.

The following safety notices are provided in English,

French, German, Italian, and Spanish languages.

Safety notice 1

Before the computer is powered-on after FRU

replacement, make sure all screws, springs, and other

small parts are in place and are not left loose inside

the computer. Verify this by shaking the computer and

listening for rattling sounds. Metallic parts or metal

flakes can cause electrical shorts.

Avant de remettre l’ordinateur sous tension après

remplacement d’une unitéen clientèle, vérifiez que

tous les ressorts, vis et autres pièces sont bien en

place et bien fixées. Pour ce faire, secouez l’unitéet

assurez-vous qu’aucun bruit suspect ne se produit. Des

pièces métalliques ou des copeaux de métal pourraient

causer un court-circuit.

Bevor nach einem FRU-Austausch der Computer

wieder angeschlossen wird, mußsichergestellt werden,

daßkeine Schrauben, Federn oder andere Kleinteile

fehlen oder im Gehäuse vergessen wurden. Der

Computer mußgeschüttelt und auf Klappergeräusche

geprüft werden. Metallteile oder-splitter können

Kurzschlüsse erzeugen.

Prima di accendere l’elaboratore dopo che éstata

effettuata la sostituzione di una FRU, accertarsi che

tutte le viti, le molle e tutte le altri parti di piccole

dimensioni siano nella corretta posizione e non siano

sparse all’interno dell’elaboratore. Verificare ciò

scuotendo l’elaboratore e prestando attenzione ad

eventuali rumori; eventuali parti o pezzetti metallici

possono provocare cortocircuiti pericolosi.

Antes de encender el sistema despues de sustituir una

FRU, compruebe que todos los tornillos, muelles y

demás piezas pequeñas se encuentran en su sitio y no

se encuentran sueltas dentro del sistema.

Compruébelo agitando el sistema y escuchando los

posibles ruidos que provocarían. Las piezas metálicas

pueden causar cortocircuitos eléctricos.

Safety notices

Introduction 3

Safety notice 2

DANGER

Some standby batteries contain a small amount of

nickel and cadmium. Do not disassemble a standby

battery, recharge it, throw it into fire or water, or

short-circuit it. Dispose of the battery as required

by local ordinances or regulations. Use only the

battery in the appropriate parts listing. Use of an

incorrect battery can result in ignition or explosion

of the battery.

Certaines batteries de secours contiennent du

nickel et du cadmium. Ne les démontez pas, ne les

rechargez pas, ne les exposez ni au feu ni à l’eau.

Ne les mettez pas en court-circuit. Pour les mettre

au rebut, conformez-vous à la réglementation en

vigueur. Lorsque vous remplacez la pile de

sauvegarde ou celle de l’horloge temps réel, veillez

à n’utiliser que les modèles cités dans la liste de

pièces détachées adéquate. Une batterie ou une

pile inappropriée risque de prendre feu ou

d’exploser.

Die Bereitschaftsbatterie, die sich unter dem

Diskettenlaufwerk befindet, kann geringe Mengen

Nickel und Cadmium enthalten. Sie darf nur durch

die Verkaufsstelle oder den IBM Kundendienst

ausgetauscht werden. Sie darf nicht zerlegt,

wiederaufgeladen, kurzgeschlossen, oder Feuer

oder Wasser ausgesetzt werden. Die Batterie kann

schwere Verbrennungen oder Verätzungen

verursachen. Bei der Entsorgung die örtlichen

Bestimmungen für Sondermüll beachten. Beim

Ersetzen der Bereitschafts-oder Systembatterie nur

Batterien des Typs verwenden, der in der

Ersatzteilliste aufgeführt ist. Der Einsatz falscher

Batterien kann zu Entzündung oder Explosion

führen.

(continued)

Safety notices

4ThinkPad A20m/p, A21m/p, A22m/p

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