Ibm Thinkpad T22 Users Manual T20, T21, T22, T23 (MT 2647/2648)

ThinkPad T20 t20_hw_maintenance_manual

THINKPAD MT 2631 thinkpad t20 t21 t22 t23

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About this manual
Contents
Introduction
General descriptions
ThinkPad T20, T21, T22 and T23 series

IBM Mobile Systems

ThinkPad Computer

Hardware Maintenance Manual

April 2002

This manual supports:

ThinkPad T20, T21, T22, T23

(MT 2647/2648)

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 174.

First Edition (April 2002)

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 T20, T21, T22, T23 (MT2647, 2648), 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 13, and “Laser compliance

statement”on page 18.

iv ThinkPad T20, T21, T22, T23 (MT 2647/2648)

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............13

General safety............13

Electrical safety ...........14

Safety inspection guide .........15

Handling devices that are sensitive to electorostatic

discharge ............16

Grounding requirements .........17

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

General descriptions ..........21

Read this first .............21

What to do first ...........21

Related service information .........23

Service web site ...........23

Restoring the preloaded system ......23

Passwords .............26

Power management ..........28

Checkout guide ............32

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

Detecting system information with PC-Doctor. . . 34

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

ThinkPad T20, T21, T22 and T23 series.....39

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

Specifications ............43

Status indicators ...........45

FRU Tests .............47

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 Backup battery ..........61

1030 Hard-disk drive ..........63

1040 DIMM ............65

1050 Mini PCI adapter .........66

1060 Ethernet daughter card .......71

1070 Ultrabay 2000 device ........73

1080 Keyboard ...........74

1090 Keyboard CRU insulator .......82

1100 Hinge cover ...........83

1110 Keyboard bezel ..........88

1120 Fan assembly ..........94

1130CPU.............98

1140 PC Card slot assembly .......100

1150 Speaker ...........103

1160 Hard-disk bay ..........105

1170 Ultrabay 2000 slot ........107

1180 System board ..........113

1190 Secure chip ..........117

1200 Microphone cable .........118

2010 LCD assembly..........121

2020 Front bezel...........122

2030 Inverter card ..........123

2040 LCD panel ...........125

2050 Antenna assembly ........128

2060 Sub card ...........131

3010 ThinkPad Dock PCI cover ......133

3020 ThinkPad Dock top cover ......136

Locations ..............140

Front view ............140

Rear view.............141

Bottom view ............142

Parts list . . ............143

T20, T21, T22 and T23 series model matrix 146

Overall .............147

AC adapters ............156

LCD FRUs ............157

Keyboard .............160

Recovery CDs ...........161

Miscellaneous parts ..........170

Optional FRUs ...........171

Common parts list ..........172

Notices . . ............174

Trademarks ............174

vi ThinkPad T20, T21, T22, T23 (MT 2647/2648)

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 expense

for replacing and servicing FRUs:

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 T20, T21, T22, T23 (MT 2647/2648)

Safety notices: multilingual translations

In this manual, safety notices appear in English with a

page number reference to the appropriate multilingual,

translated safety notice found in this section.

The following safety notices are provided in English,

French, German, Italian, and Spanish.

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 T20, T21, T22, T23 (MT 2647/2648)

(continuation of safety notice 2)

Alcune batterie di riserva contengono una piccola

quantitàdi nichel e cadmio. Non smontarle,

ricaricarle, gettarle nel fuoco o nell’acqua né

cortocircuitarle. Smaltirle secondo la normativa in

vigore (DPR 915/82, successive disposizioni e

disposizioni locali). Quando si sostituisce la

batteria dell’RTC (real time clock) o la batteria di

supporto, utilizzare soltanto i tipi inseriti

nell’appropriato Catalogo parti. L’impiego di una

batteria non adatta potrebbe determinare l’incendio

ol’esplosione della batteria stessa.

Algunas baterías de reserva contienen una

pequeña cantidad de níquel y cadmio. No las

desmonte, ni recargue, ni las eche al fuego o al

agua ni las cortocircuite. Deséchelas tal como

dispone la normativa local. Utilice sólo baterías que

se encuentren en la lista de piezas. La utilización

de una batería no apropiada puede provocar la

ignición o explosión de la misma.

Safety notices

Introduction 5

Safety notice 3

DANGER

The battery pack contains small amounts of nickel.

Do not disassemble it, throw it into fire or water, or

short-circuit it. Dispose of the battery pack as

required by local ordinances or regulations. Use

only the battery in the appropriate parts listing

when replacing the battery pack. Use of an

incorrect battery can result in ignition or explosion

of the battery.

La batterie contient du nickel. Ne la démontez pas,

ne l’exposez ni au feu ni àl’eau. Ne la mettez pas

en court-circuit. Pour la mettre au rebut,

conformez-vous àla réglementation en vigueur.

Lorsque vous remplacez la batterie, veillez à

n’utiliser que les modèles cités dans la liste de

pièces détachées adéquate. En effet, une batterie

inappropriée risque de prendre feu ou d’exploser.

Akkus enthalten geringe Mengen von Nickel. Sie

dürfen nicht zerlegt, wiederaufgeladen,

kurzgeschlossen, oder Feuer oder Wasser

ausgesetzt werden. Bei der Entsorgung die

örtlichen Bestimmungen für Sondermüll beachten.

Beim Ersetzen der Batterie nur Batterien des Typs

verwenden, der in der Ersatzteilliste aufgeführt ist.

Der Einsatz falscher Batterien kann zu Entzündung

oder Explosion führen.

La batteria contiene piccole quantitàdi nichel. Non

smontarla, gettarla nel fuoco o nell’acqua né

cortocircuitarla. Smaltirla secondo la normativa in

vigore (DPR 915/82, successive disposizioni e

disposizioni locali). Quando si sostituisce la

batteria, utilizzare soltanto i tipi inseriti

nell’appropriato Catalogo parti. L’impiego di una

batteria non adatta potrebbe determinare l’incendio

ol’esplosione della batteria stessa.

(continued)

Safety notices

6ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Safety notice 4

DANGER

(continuation of safety notice 3)

Las baterías contienen pequeñas cantidades de

níquel. No las desmonte, ni recargue, ni las eche al

fuego o al agua ni las cortocircuite. Deséchelas tal

como dispone la normativa local. Utilice sólo

baterías que se encuentren en la lista de piezas al

sustituir la batería. La utilización de una bateríano

apropiada puede provocar la ignición o explosión

de la misma.

The lithium battery can cause a fire, an explosion,

or a severe burn. Do not recharge it, remove its

polarized connector, disassemble it, heat it above

100°C (212°F), incinerate it, or expose its cell

contents to water. 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.

La pile de sauvegarde contient du lithium. Elle

présente des risques d’incendie, d’explosion ou de

brûlures graves. Ne la rechargez pas, ne retirez pas

son connecteur polariséet ne la démontez pas. Ne

l’exposez pas àune temperature supérieure à

100°C, ne la faites pas brûler et n’en exposez pas

le contenu àl’eau. Mettez la pile au rebut

conformément àla réglementation en vigueur. Une

pile inappropriée risque de prendre feu ou

d’exploser.

(continued)

Safety notices

Introduction 7

(continuation of safety notice 4)

Die Systembatterie ist eine Lithiumbatterie. Sie

kann sich entzünden, explodieren oder schwere

Verbrennungen hervorrufen. Batterien dieses Typs

dürfen nicht aufgeladen, zerlegt, über 100 C erhitzt

oder verbrannt werden. Auch darf ihr Inhalt nicht

mit Wasser in Verbindung gebracht oder der zur

richtigen Polung angebrachte Verbindungsstecker

entfernt werden. Bei der Entsorgung die örtlichen

Bestimmungen für Sondermüll beachten. Beim

Ersetzen der Batterie nur Batterien des Typs

verwenden, der in der Ersatzteilliste aufgeführt ist.

Der Einsatz falscher Batterien kann zu Entzündung

oder Explosion führen.

La batteria di supporto e una batteria al litio e puo

incendiarsi, esplodere o procurare gravi ustioni.

Evitare di ricaricarla, smontarne il connettore

polarizzato, smontarla, riscaldarla ad una

temperatura superiore ai 100 gradi centigradi,

incendiarla o gettarla in acqua. Smaltirla secondo

la normativa in vigore (DPR 915/82, successive

disposizioni e disposizioni locali). L’impiego di una

batteria non adatta potrebbe determinare l’incendio

ol’esplosione della batteria stessa.

La batería de repuesto es una batería de litio y

puede provocar incendios, explosiones o

quemaduras graves. No la recargue, ni quite el

conector polarizado, ni la desmonte, ni caliente por

encima de los 100°C (212°F), ni la incinere ni

exponga el contenido de sus celdas al agua.

Deséchela tal como dispone la normativa local.

Safety notices

8ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Safety notice 5

If the LCD breaks and the fluid from inside the LCD

gets into your eyes or on your hands, immediately

wash the affected areas with water for at least 15

minutes. Seek medical care if any symptoms from the

fluid are present after washing.

Si le panneau d’affichage àcristaux liquides se brise et

que vous recevez dans les yeux ou sur les mains une

partie du fluide, rincez-les abondamment pendant au

moins quinze minutes. Consultez un médecin si des

symptômes persistent après le lavage.

Die Leuchtstoffröhre im LCD-Bildschirm enthält

Quecksilber. Bei der Entsorgung die örtlichen

Bestimmungen für Sondermüll beachten. Der

LCD-Bildschirm besteht aus Glas und kann zerbrechen,

wenn er unsachgemäß behandelt wird oder der

Computer auf den Boden fällt. Wenn der Bildschirm

beschädigt ist und die darin befindliche Flüssigkeit in

Kontakt mit Haut und Augen gerät, sollten die

betroffenen Stellen mindestens 15 Minuten mit Wasser

abgespült und bei Beschwerden anschließend ein Arzt

aufgesucht werden.

Nel caso che caso l’LCD si dovesse rompere ed il

liquido in esso contenuto entrasse in contatto con gli

occhi o le mani, lavare immediatamente le parti

interessate con acqua corrente per almeno 15 minuti;

poi consultare un medico se i sintomi dovessero

permanere.

Si la LCD se rompe y el fluido de su interior entra en

contacto con sus ojos o sus manos, lave

inmediatamente las áreas afectadas con agua durante

15 minutos como mínimo. Obtenga atención medica si

se presenta algúnsíntoma del fluido despues de

lavarse.

Safety notices

Introduction 9

Safety notice 6

DANGER

To avoid shock, do not remove the plastic cover

that protects the lower part of the inverter card.

Afin d’éviter tout risque de choc électrique, ne

retirez pas le cache en plastique protégeant la

partie inférieure de la carte d’alimentation.

Aus Sicherheitsgründen die Kunststoffabdeckung,

die den unteren Teil der Spannungswandlerplatine

umgibt, nicht entfernen.

Per evitare scosse elettriche, non rimuovere la

copertura in plastica che avvolge la parte inferiore

della scheda invertitore.

Para evitar descargas, no quite la cubierta de

plástico que rodea la parte baja de la tarjeta

invertida.

Safety notices

10 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Safety notice 7

DANGER

Though the main batteries have low voltage, a

shorted or grounded battery can produce enough

current to burn personnel or combustible materials.

Bien que le voltage des batteries principales soit

peu élevé, le court-circuit ou la mise àla masse

d’une batterie peut produire suffisamment de

courant pour brûler des matériaux combustibles ou

causer des brûlures corporelles graves.

Obwohl Hauptbatterien eine niedrige Spannung

haben, können sie doch bei Kurzschlußoder

Erdung genug Strom abgeben, um brennbare

Materialien zu entzünden oder Verletzungen bei

Personen hervorzurufen.

Sebbene le batterie di alimentazione siano a basso

voltaggio, una batteria in corto circuito o a massa

puòfornire corrente sufficiente da bruciare

materiali combustibili o provocare ustioni ai tecnici

di manutenzione.

Aunque las baterías principales tienen un voltaje

bajo, una batería cortocircuitada o con contacto a

tierra puede producir la corriente suficiente como

para quemar material combustible o provocar

quemaduras en el personal.

Safety notices

Introduction 11

Safety notice 8

DANGER

Before removing any FRU, power off the computer,

unplug all power cords from electrical outlets,

remove the battery pack, and then disconnect any

interconnecting cables.

Avant de retirer une unitéremplaçable en clientèle,

mettez le système hors tension, débranchez tous

les cordons d’alimentation des socles de prise de

courant, retirez la batterie et déconnectez tous les

cordons d’interface.

Die Stromzufuhr mußabgeschaltet, alle Stromkabel

aus der Steckdose gezogen, der Akku entfernt und

alle Verbindungskabel abgenommen sein, bevor

eine FRU entfernt wird.

Prima di rimuovere qualsiasi FRU, spegnere il

sistema, scollegare dalle prese elettriche tutti i cavi

di alimentazione, rimuovere la batteria e poi

scollegare i cavi di interconnessione.

Antes de quitar una FRU, apague el sistema,

desenchufe todos los cables de las tomas de

corriente eléctrica, quite la bateríay,a

continuación, desconecte cualquier cable de

conexión entre dispositivos.

Safety notices

12 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Safety information

The following section presents the safety information that

you need to be familiar with before servicing an IBM

mobile computer.

General safety

Follow these rules to ensure general safety:

vObserve good housekeeping in the area of the

machines during and after maintenance.

vWhen lifting any heavy object:

1. Ensure you can stand safely without slipping.

2. Distribute the weight of the object equally between

your feet.

3. Use a slow lifting force. Never move suddenly or

twist when you attempt to lift.

4. Lift by standing or by pushing up with your leg

muscles; this action removes the strain from the

muscles in your back. Do not attempt to lift any

object that weighs more than 16 kg (35 lb) or objects

that you think are too heavy for you.

vDo not perform any action that causes hazards to the

customer, or that makes the equipment unsafe.

vBefore you start the machine, ensure that other service

representatives and the customer’s personnel are not in

a hazardous position.

vPlace removed covers and other parts in a safe place,

away from all personnel, while you are servicing the

machine.

vKeep your toolcase away from walk areas so that other

people will not trip over it.

vDo not wear loose clothing that can be trapped in the

moving parts of a machine. Make sure that your sleeves

are fastened or rolled up above your elbows. If your hair

is long, fasten it.

vInsert the ends of your necktie or scarf inside clothing or

fasten it with a nonconductive clip, approximately 8

centimeters (3 inches) from the end.

vDo not wear jewelry, chains, metal-frame eyeglasses, or

metal fasteners for your clothing.

Attention: Metal objects are good electrical

conductors.

vWear safety glasses when you are hammering, drilling,

soldering, cutting wire, attaching springs, using solvents,

or working in any other conditions that might be

hazardous to your eyes.

Safety information

Introduction 13

vAfter service, reinstall all safety shields, guards, labels,

and ground wires. Replace any safety device that is

worn or defective.

vReinstall all covers correctly before returning the

machine to the customer.

Electrical safety

Observe the following rules when working on electrical

equipment.

Important

Use only approved tools and test equipment. Some

hand tools have handles covered with a soft

material that does not insulate you when working

with live electrical currents.

Many customers have, near their equipment, rubber

floor mats that contain small conductive fibers to

decrease electrostatic discharges. Do not use this

type of mat to protect yourself from electrical shock.

vFind the room emergency power-off (EPO) switch,

disconnecting switch, or electrical outlet. If an electrical

accident occurs, you can then operate the switch or

unplug the power cord quickly.

vDo not work alone under hazardous conditions or near

equipment that has hazardous voltages.

vDisconnect all power before:

–Performing a mechanical inspection

–Working near power supplies

–Removing or installing main units

vBefore you start to work on the machine, unplug the

power cord. If you cannot unplug it, ask the customer to

power-off the wall box that supplies power to the

machine and to lock the wall box in the off position.

vIf you need to work on a machine that has exposed

electrical circuits, observe the following precautions:

–Ensure that another person, familiar with the

power-off controls, is near you.

Attention: Another person must be there to switch

off the power, if necessary.

–Use only one hand when working with powered-on

electrical equipment; keep the other hand in your

pocket or behind your back.

Attention: An electrical shock can occur only when

there is a complete circuit. By observing the above

rule, you may prevent a current from passing through

your body.

Safety information

14 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

–When using testers, set the controls correctly and

use the approved probe leads and accessories for

that tester.

–Stand on suitable rubber mats (obtained locally, if

necessary) to insulate you from grounds such as

metal floor strips and machine frames.

Observe the special safety precautions when you work

with very high voltages; these instructions are in the

safety sections of maintenance information. Use

extreme care when measuring high voltages.

vRegularly inspect and maintain your electrical hand tools

for safe operational condition.

vDo not use worn or broken tools and testers.

vNever assume that power has been disconnected from

a circuit. First, check that it has been powered off.

vAlways look carefully for possible hazards in your work

area. Examples of these hazards are moist floors,

nongrounded power extension cables, power surges,

and missing safety grounds.

vDo not touch live electrical circuits with the reflective

surface of a plastic dental mirror. The surface is

conductive; such touching can cause personal injury and

machine damage.

vDo not service the following parts with the power on

when they are removed from their normal operating

places in a machine:

–Power supply units

–Pumps

–Blowers and fans

–Motor generators

and similar units. (This practice ensures correct

grounding of the units.)

vIf an electrical accident occurs:

–Use caution; do not become a victim yourself.

–Switch off power.

–Send another person to get medical aid.

Safety inspection guide

The purpose of this inspection guide is to assist you in

identifying potentially unsafe conditions. As each machine

was designed and built, required safety items were

installed to protect users and service personnel from injury.

This guide addresses only those items. You should use

good judgment to identify potential safety hazards due to

attachment of non-IBM features or options not covered by

this inspection guide.

Safety information

Introduction 15

If any unsafe conditions are present, you must determine

how serious the apparent hazard could be and whether

you can continue without first correcting the problem.

Consider these conditions and the safety hazards they

present:

vElectrical hazards, especially primary power (primary

voltage on the frame can cause serious or fatal

electrical shock)

vExplosive hazards, such as a damaged CRT face or a

bulging capacitor

vMechanical hazards, such as loose or missing hardware

To determine whether there are any potentially unsafe

conditions, use the following checklist at the beginning of

every service task. Begin the checks with the power off,

and the power cord disconnected.

Checklist:

1. Check exterior covers for damage (loose, broken, or

sharp edges).

2. Power-off the computer. Disconnect the power cord.

3. Check the power cord for:

a. A third-wire ground connector in good condition.

Use a meter to measure third-wire ground

continuity for 0.1 ohm or less between the external

ground pin and frame ground.

b. The power cord should be the type specified in the

parts list.

c. Insulation must not be frayed or worn.

4. Remove the cover.

5. Check for any obvious non-IBM alterations. Use good

judgment as to the safety of any non-IBM alterations.

6. Check inside the unit for any obvious unsafe

conditions, such as metal filings, contamination, water

or other liquids, or signs of fire or smoke damage.

7. Check for worn, frayed, or pinched cables.

8. Check that the power-supply cover fasteners (screws

or rivets) have not been removed or tampered with.

Handling devices that are sensitive to

electorostatic discharge

Any computer part containing transistors or integrated

circuits (ICs) should be considered sensitive to electrostatic

discharge (ESD.) ESD damage can occur when there is a

difference in charge between objects. Protect against ESD

Safety information

16 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

damage by equalizing the charge so that the machine, the

part, the work mat, and the person handling the part are all

at the same charge.

Notes

1. Use product-specific ESD procedures when they

exceed the requirements noted here.

2. Make sure that the ESD protective devices you

use have been certified (ISO 9000) as fully

effective.

When handling ESD-sensitive parts:

vKeep the parts in protective packages until they are

inserted into the product.

vAvoid contact with other people.

vWear a grounded wrist strap against your skin to

eliminate static on your body.

vPrevent the part from touching your clothing. Most

clothing is insulative and retains a charge even when

you are wearing a wrist strap.

vUse the black side of a grounded work mat to provide a

static-free work surface. The mat is especially useful

when handling ESD-sensitive devices.

vSelect a grounding system, such as those listed below,

to provide protection that meets the specific service

requirement.

Note

The use of a grounding system is desirable but

not required to protect against ESD damage.

–Attach the ESD ground clip to any frame ground,

ground braid, or green-wire ground.

–Use an ESD common ground or reference point

when working on a double-insulated or

battery-operated system. You can use coax or

connector-outside shells on these systems.

–Use the round ground-prong of the AC plug on

AC-operated computers.

Grounding requirements

Electrical grounding of the computer is required for

operator safety and correct system function. Proper

grounding of the electrical outlet can be verified by a

certified electrician.

Safety information

Introduction 17

Laser compliance statement

Some IBM Personal Computer models are equipped from

the factory with an optical storage device such as a

CD-ROM drive or a DVD-ROM drive. They are also sold

separately as options. The drive is certified in the U.S. to

conform to the requirements of the Department of Health

and Human Services 21 Code of Federal Regulations

(DHHS 21 CFR) Subchapter J for Class 1 laser products.

Elsewhere, the drive is certified to conform to the

requirements of the International Electrotechnical

Commission (IEC) 825 and CENELEC EN 60 825 for

Class 1 laser products.

Laser compliance statement

18 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

When a CD-ROM drive, DVD drive or the other laser

product is installed, note the following:

CAUTION:

Opening the CD-ROM drive, DVD-ROM drive or the other

optical storage device could result in exposure to

hazardous laser radiation. There are no serviceable parts

inside those drives. Do not open.

Use of controls or adjustments or performance of

procedures other than those specified herein might

result in hazardous radiation exposure.

O uso de controles, ajustes ou desempenho de

procedimentos diferentes daqueles aqui

especificados pode resultar em perigosa exposição

àradiação.

Pour éviter tout risque d’exposition au rayon laser,

respectez les consignes de réglage et d’utilisation

des commandes, ainsi que les procédures décrites.

Werden Steuer- und Einstellelemente anders als

hier festgesetzt verwendet, kann gefährliche

Laserstrahlung auftreten.

L’utilizzo di controlli, regolazioni o l’esecuzione di

procedure diverse da quelle specificate possono

provocare l’esposizione a.

El uso de controles o ajustes o la ejecuciónde

procedimientos distintos de los aquíespecificados

puede provocar la exposición a radiaciones

peligrosas.

Laser compliance statement

Introduction 19

Some CD-ROM drives, DVD-ROM drives, or other optical

storage devices contain an embedded Class 3A or Class

3B laser diode. Note the following:

DANGER

Emits visible and invisible laser radiation when

open. Do not stare into the beam, do not view

directly with optical instruments, and avoid direct

exposure to the beam.

Radiação por raio laser ao abrir. Não olhe fixo no

feixe de luz, não olhe diretamente por meio de

instrumentos óticos e evite exposição direta com o

feixe de luz.

Rayonnement laser si carter ouvert. Évitez de fixer

le faisceau, de le regarder directement avec des

instruments optiques, ou de vous exposer au

rayon.

Laserstrahlung bei geöffnetem Gerät. Nicht direkt

oder über optische Instrumente in den Laserstrahl

sehen und den Strahlungsbereich meiden.

Kinyitáskor lézersugár!Nenézzen bele se szabad

szemmel, se optikai eszközökkel. Kerülje a

sugárnyalábbal valóérintkezést !.

Aprendo l’unitàvengono emesse radiazioni laser.

Non fissare il fascio, non guardarlo direttamente

con strumenti ottici e evitare l’esposizione diretta al

fascio.

Radiaciónláser al abrir. No mire fijamente ni

examine con instrumental óptico el haz de luz.

Evite la exposición directa al haz.

Laser compliance statement

20 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

General descriptions

This chapter includes descriptions for any ThinkPad model

that has the PC-Doctor DOS diagnostics program. Some

descriptions might not apply to your particular computer.

Read this first

Before you go to the checkout guide, be sure to read this

section.

Important notes

vOnly certified trained personnel should

service the computer.

vRead the entire FRU removal and replacement

page before replacing any FRU.

vUse new nylon-coated screws when you

replace FRUs.

vBe extremely careful during such write

operations as copying, saving, or formatting.

Drives in the computer that you are servicing

sequence might have been altered. If you select

an incorrect drive, data or programs might be

overwritten.

vReplace FRUs only for the correct model.

When you replace a FRU, make sure the model

of the machine and the FRU part number are

correct by referring to the FRU parts list.

vA FRU should not be replaced because of a

single, unreproducible failure. Single failures

can occur for a variety of reasons that have

nothing to do with a hardware defect, such as

cosmic radiation, electrostatic discharge, or

software errors. Consider replacing a FRU only

when a problem recurs. If you suspect that a

FRU is defective, clear the error log and run the

test again. If the error does not recur, do not

replace the FRU.

vBe careful not to replace a nondefective FRU.

What to do first

When you do return a FRU, you must include the following

information in the parts exchange form or parts return form

that you attach to it:

__ 1. Name and phone number of servicer

__ 2. Date of service

__ 3. Date on which the machine failed

__ 4. Date of purchase

__ 5. Failure symptoms, error codes appearing on the

display, and beep symptoms

__ 6. Procedure index and page number in which the

failing FRU was detected

__ 7. Failing FRU name and part number

__ 8. Machine type, model number, and serial number

__ 9. Customer’s name and address

Note for warranty:

During the warranty period, the customer may be

responsible for repair costs if the computer damage was

caused by misuse, accident, modification, unsuitable

physical or operating environment, or improper

maintenance by the customer. The following list provides

some common items that are not covered under warranty

and some symptoms that might indicate that the system

was subjected to stress beyond normal use.

Before checking problems with the computer, determine

whether the damage is covered under the warranty by

referring to the following:

The following are not covered under warranty:

vLCD panel cracked from the application of excessive

force or from being dropped

vScratched (cosmetic) parts

vDistortion, deformation, or discoloration of the cosmetic

parts

vCracked or broken plastic parts, broken latches, broken

pins, or broken connectors caused by excessive force

vDamage caused by liquid spilled into the system

vDamage caused by the improper insertion of a PC Card

or the installation of an incompatible card

vDamage caused by foreign material in the diskette drive

vDiskette drive damage caused by pressure on the

diskette drive cover or by the insertion of a diskette with

multiple labels

vDamaged or bent diskette eject button

vFuses blown by attachment of a nonsupported device

vForgotten computer password (making the computer

unusable)

vSticky keys caused by spilling a liquid onto the keyboard

The following symptoms might indicate damage

caused by nonwarranted activities:

vMissing parts might be a symptom of unauthorized

service or modification.

vIf the spindle of a hard-disk drive becomes noisy, it may

have been subjected to excessive force, or dropped.

Read this first

22 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Related service information

This section provides information about the following:

v“Service web site”

v“Restoring the preloaded system”

v“Passwords”on page 26

v“Power management”on page 28

Service web site

When the latest maintenance diskette and the system

program service diskette become available, a notice will be

posted on http://www.ibm.com/pc/partner/infotips

Restoring the preloaded system

If the data on a hard-disk drive is damaged or accidentally

erased, you can restore the software that was shipped with

the computer. This software includes the pre-installed

operating system, applications, and device drivers.

To restore the pre-installed software, you can use either

the Product Recovery program or a recovery CD.

Ordering the recovery CD

When the hard-disk drive is replaced because of a

failure, no Product Recovery program is on the new

hard disk. In this case, you must use the Product

Recovery CD for the computer. Order the recovery

CD and the hard-disk drive at the same time so that

you can recover the new hard-disk drive with the

pre-installed software when they arrive. For

information on which CD to order, see “Recovery

CDs”on page 161

The Product Recovery program is in the service partition, a

section of the hard-disk drive that is not displayed by

Windows Explorer.

Attention: All of the files on the primary hard-disk

partition (usually drive C) will be lost in the recovery

process. Be sure to back up copies of the files you have

saved on your drive C before you begin.

Creating a Recovery Repair diskette

If the operating system cannot boot normally, or if you

cannot get access to the Product Recovery program, you

can use the Recovery Repair diskette to boot the

computer. Make a Recovery Repair diskette and save it for

future use. To make a Recovery Repair diskette, do the

following:

1. Shut down and restart the computer.

Related service information

General descriptions 23

2. At the prompt, press F11. (The option to press F11

appears for only a few seconds. You must press F11

quickly.) The Product Recovery program main menu

opens.

Note: If you are prompted to select the operating

system, select one you want to recover. Then

the Product Recovery program main menu

opens.

3. Select System Utilities from the main menu. Press

Enter.

4. Select Create a Recovery Repair diskette. Press

Enter.

5. Follow the on-screen instructions.

6. When the process is completed, label the diskette

“Recovery Repair diskette”and save it for future use.

Product Recovery program

Note: The recovery process might take up to 2 hours.

To use the Product Recovery program to restore the

pre-installed software, do the following:

1. Save all files and shut down the desktop.

2. Turn off the computer.

3. Turn on the computer. If you are using Windows XP,

three messages (F1, F11, and F12) appear on the

screen for a few seconds. One of them is “Press F11

to invoke the IBM Product Recovery program”.

While the message is displayed, quickly press F11.

If you are using Windows 2000 or another operating

system, the startup screen is displayed first, and then

the message “To start the Product Recovery

program, press F11”at the top of the screen. Here

again it appears very briefly; watch for it, and press

F11 before it disappears.

Note: If this message is not displayed, you can use a

Recovery Repair diskette to get access to the

Product Recovery program. (For using a

Recovery Repair diskette, see “To use the

Recovery Repair diskette:”on page 26.)

4. From the list displayed on the screen, select the

operating system you want to recover.

5. Select the recovery options you want, and follow the

instructions on the screen.

6. When the Product Recovery program finishes running,

the computer will restart with the pre-installed operating

system, drivers, and software.

Related service information

24 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Note: Network drivers are not automatically restored

with Windows NT 4.0; you will need to reinstall

them.

Note: If you use Windows 2000 or Windows 98,

restart the system by pressing Ctrl+Alt+Del or

by turning the computer off and then on again.

The computer will restart with the pre-installed

operating system, drivers, and software.

Using the recovery CD

To create the service partition and install the preloaded

system from the recovery CD, do the following:

To create the service partition:

1. Erase all partitions on the hard-disk drive, using FDISK

or a similar application.

2. Boot with the recovery CD (and the boot diskette if

required.)

3. Following message is displayed: “Your computer

originally included a Product Recovery program ...

Reinstall the Product Recovery program? (Y/N) [ ]”.

Note: If the hard-disk drive contains any partitions, you

do not receive this message; go to step 1.

4. Press Y key. The service partition is created and

loaded with the Product Recovery program files.

Note: If you do not want to create the service partition,

press N key, and then go to step 8.

5. At next window, press Enter to continue.

vThe service partition is created. The system

automatically reboots during this process.

vThe recovery process copies some files to the

service partition, and PKUNZIPs others.

vFollow the prompts. You may be prompted to

change CDs.

vWhen the process is complete, the system reboots.

Continue to step 6 to install preloaded system.

Install preloaded system from CD:

6. Boot with the recovery CD (and the boot diskette if

required.)

7. If the hard-disk drive is blank, the following message

is displayed: “Your computer originally included a

Product Recovery program ... Reinstall the

Product Recovery program? (Y/N) [ ]”.

vTo install the service partition, go to step 4.

Related service information

General descriptions 25

vTo preload the hard-disk drive without installing the

service partition, press N key.

8. If you get a message asking which operating system

to install, select the proper operating system and

press Enter.

9. A message is displayed: “Full Recovery:”. Press

Enter to select.

10. On each of the next three windows, press the Y key.

11. Follow the prompts to complete the recovery.

To use the Recovery Repair diskette:

1. Shut down and turn off the computer.

2. Insert the Recovery Repair diskette into the drive, and

then turn on the computer.

3. Follow the on-screen instructions.

Passwords

As many as three passwords may be needed for any

ThinkPad computer: the power-on password (POP), the

hard-disk password (HDP), and the supervisor password

(SVP).

If any of these passwords has been set, a prompt for it

appears on the screen whenever the computer is turned

on. The computer does not start until the password is

entered.

Exception: If only an SVP is installed, the password

prompt does not appear when the operating

system is booted.

Power-on password:

A power-on password (POP) protects the system from

being powered on by an unauthorized person. The

password must be entered before an operating system can

be booted.

Hard-disk password:

There are two hard-disk passwords (HDPs):

vUser HDP—for the user

vMaster HDP—for the system administrator, who can use

it to get access to the hard disk even if the user has

changed the user HDP

Note: There are two modes for the HDP: User only and

Master + User. The Master + User mode requires

two HDPs; the system administrator enters both in

the same operation. The system administrator then

provides the user HDP to the system user.

Related service information

26 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Attention: If the user HDP has been forgotten, check

whether a master HDP has been set. If it has, it can be

used for access to the hard-disk drive. If no master HDP is

available, IBM does not provide any services to reset

either the user or the master HDP, or to recover data from

the hard-disk drive. The hard-disk drive can be replaced

for a scheduled fee.

Supervisor password:

A supervisor password (SVP) protects the system

information stored in the IBM BIOS Setup Utility. The SVP

must be entered in order to get access to the IBM BIOS

Setup Utility and make changes to system configuration

settings.

Attention: If the SVP has been forgotten and cannot be

made available to the servicer, there is no service

procedure to reset the password. The system board must

be replaced for a scheduled fee.

How to remove the power-on password

To remove a POP that you have forgotten, do the

following:

(A) If no SVP has been set:

1. Turn off the computer.

2. Remove the battery pack.

For how to remove the battery pack, see “1010 Battery

pack”on page 60.

3. Remove the backup battery.

For how to remove the backup battery, see “1020

Backup battery”on page 61.

4. Turn on the computer and wait until the POST ends.

After the POST ends, the password prompt does not

appear. The POP has been removed.

5. Reinstall the backup battery and the battery pack.

(B) If an SVP has been set and is known by the servicer:

1. Turn on the computer by pressing and holding F1.

2. Enter the SVP. The IBM BIOS Setup Utility menu

appears.

3. Select Password, using the cursor keys to move down

the menu.

4. Select Power-On Password.

5. At the Enter Current Password field, enter the SVP.

6. When the Enter New Password field opens, leave it

blank and press Enter twice.

7. In the Changes have been saved window, press Enter.

Related service information

General descriptions 27

8. Press F10; then, in the Setup confirmation window,

select Yes .

How to remove the hard-disk password

Attention: If User only mode is selected and the user

HDP has been forgotten and cannot be made available to

the servicer, IBM does not provide any services to reset

the user HDPs or to recover data from the hard-disk drive.

The hard-disk drive can be replaced for a scheduled fee.

To remove a user HDP that has been forgotten, when the

SVP and the master HDP are known, do the following:

1. Power on the computer by pressing and holding F1.

2. Enter the SVP. The IBM BIOS Setup Utility menu

appears.

3. Select Password, using the cursor keys to move down

the menu.

4. Select Hard-disk xpassword, where xis the letter of

the hard-disk drive. A pop-up window opens.

5. Select Master HDP.

6. Enter the master HDP; then leave the New Password

field blank and press Enter twice.

7. Press F10.

8. Select Yes in the Setup Configuration window.

Both user HDP and master HDP will have been

removed.

Power management

To reduce power consumption, the computer has three

power management modes: screen blank, standby, and

hibernation.

Notes

vScreen blank mode is called standby mode in

Windows 95 and Windows NT.

vStandby mode is called suspend mode in

Windows 95 and Windows NT.

Screen blank mode

Screen blank mode has three variants, as follows:

1. If you press Fn+F3, or the time set on the “LCD off

timer”in IBM BIOS Setup Utility expires,

vThe LCD backlight turns off.

vThe hard-disk drive motor stops.

vThe speaker is muted.

2. If you are using the ACPI operating system and you

press Fn+F3,

vThe LCD backlight turns off.

Related service information

28 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

vThe hard-disk drive motor stops.

3. If the time set on the “Turn off monitor”timer in the

operating system expires,

vThe LCD backlight turns off.

To end screen blank mode and resume normal operation,

press any key.

Standby mode

When the computer enters standby mode, the following

events occur in addition to what occurs in screen blank

mode:

vThe LCD is powered off.

vThe hard-disk drive is powered off.

vThe CPU stops.

To enter standby mode, press Fn+F4.

Note: You can change the action of Fn+F4, if you are

using the ACPI operating system.

In certain circumstances, the computer goes into standby

mode automatically:

vIf a “suspend time”has been set on the timer, and the

user does not do any operation with the keyboard, the

TrackPoint, the hard disk, the parallel connector, or the

diskette drive within that time.

vIf the battery indicator blinks orange, indicating that the

battery power is low. (Alternatively, if Hibernate when

battery becomes low has been selected in the “Power

Management Properties”window, the computer goes

into hibernation mode.)

Note for the APM operating system:

Even if you do not set the low-battery alarm, the charge

indicator notifies you when the battery is low, and then the

computer enters the power-saving mode automatically.

This default low-battery behavior is independent of the

operating system; so if you have set the low-battery alarm,

the computer may not do what you specified. It chooses

either your setting or the default setting, whichever is

appropriate.

If you are using the ACPI operating system, only the

low-battery alarm is available.

To cause the computer to return from standby mode and

resume operation, do one of the following:

vPress the Fn key.

vOpen the LCD cover (only if you are using Windows Me

and you entered standby mode by closing the LCD

cover.)

Related service information

General descriptions 29

vTurn on the power switch.

Also, the computer automatically returns from standby

mode and resumes operation in either of the following

events:

vThe ring indicator (RI) is signaled by a serial device or a

PC Card device (Windows 2000 does not support the

ring indicator (RI) resume by PC Card device.)

vThe time set on the resume timer elapses. In Windows

98, the Scheduled Tasks setting takes priority over the

Resume on timer selection in the “Power Management

Properties”window.

Note: The computer does not accept any input

immediately after it enters standby mode. Wait a

few seconds before taking any action to reenter

operation mode.

Hibernation mode

Note for Windows NT

If you are using Windows NT in the default format,

NTFS, you cannot create a hibernation file. If you

want to use hibernation mode, you will need to

reinstall Windows NT with FAT format.

Note for OS/2

If you are using OS/2 in the default format, HPFS,

you cannot create a hibernation file. If you want to

use hibernation mode, you will need to reinstall

OS/2 with FAT format.

In hibernation mode, the following occurs:

vThe system status, RAM, VRAM, and setup data are

stored on the hard disk.

vThe system is powered off.

Note: If the computer enters the hibernation mode while it

is docked to the docking station, do not undock it

from the docking station before resuming normal

operation. If you do undock it and then try to

resume normal operation, you will get an error

message, and you will have to restart the system.

To cause the computer to enter hibernation mode, do any

of the following:

vPress the Fn+F12 keys.

vIf you are using the APM operating system and have set

the mode to Power switch mode [Hibernation], turn

off the power switch.

Related service information

30 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

vIf you are using the ACPI operating system and have

defined one of the following actions as the event that

causes the system to go into hibernation mode, perform

that action.

–Closing the lid.

–Pressing the power button.

–Pressing Fn+F4 keys.

Also, the computer goes into hibernation mode

automatically in either of the following conditions:

vIf a “hibernation time”has been set on the timer, and the

user does not do any operation with the keyboard, the

TrackPoint, the hard-disk drive, the parallel connector, or

the diskette drive within that time.

vIf the timer conditions are satisfied in suspend mode.

vIf you are using the APM operating system and have set

the mode to Hibernate when battery becomes low,

and the battery charge becomes critically low.

When the power is turned on, the computer returns from

hibernation mode and resumes operation. The hibernation

file in the boot record on the hard-disk drive is read, and

system status is restored from the hard-disk drive.

Related service information

General descriptions 31

Checkout guide

Use the following procedures as a guide in identifying and

correcting problems with the ThinkPad computer.

Note: The diagnostic tests are intended to test only IBM

products. The use of non-IBM products, prototype

cards, or modified options can lead to false

indications of errors and invalid system responses.

1. Identify the failing symptoms in as much detail as

possible.

2. Verify the symptoms. Try to re-create the failure by

running the diagnostic test or by repeating the

operation.

Testing the computer

The ThinkPad computer has a test program called

PC-Doctor

DOS (hereafter called PC-Doctor.) You can

detect errors by running the diagnostics test included in

PC-Doctor. This section is an overview of the procedure.

For details that depend on model-unique functions, refer to

“Product overview”on page 41.

For some possible configurations of the computer,

PC-Doctor might not run correctly. To avoid this problem,

you need to initialize the computer setup by use of the IBM

BIOS Setup Utility before you run PC-Doctor. On the IBM

BIOS Setup Utility screen, press F9, Enter, F10, and then

Enter.

Note: When you initialize the computer configuration,

some devices are disabled, such as the serial port.

If you test one of these devices, you will need to

enable it by using PS2.EXE.

PC-Doctor cannot be used to test a device that is in the

docking station, even if the computer supports the docking

station. To test a USB device, connect it to the USB

connector of the computer. To test the Ultrabay 2000

device, install it in the Ultrabay 2000 slot of the computer.

To run the test, do as follows:

Note: In the following procedure, you can select an item

not only with the arrow keys, but also with the

TrackPoint. Instead of pressing Enter, click the left

button.

1. Insert the PC-Doctor disk into the diskette drive; then

power on the computer.

If the computer cannot be powered on, go to “Power

system checkout”on page 35, and check the power

sources.

Checkout guide

32 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

If an error code appears, go to “Symptom-to-FRU

index”on page 49.

On the first screen, select the model and press Enter.

Follow the instructions on the screen.

2. The main panel of PC-Doctor appears.

3. Select Diagnostics with the arrow keys, and press

Enter.

A pull-down menu appears. (Its exact form depends on

the model.)

The options on the test menu are as follows:

Diagnostics Interactive Tests

vRun Normal Test

vRun Quick Test

vCPU/Coprocessor

vSystemboard

vVideo Adapter

vSerial Ports

vParallel Ports

vFixed Disks

vDiskette Drives

vOther Devices

vZIP Drive

vLS-120/240 Drive

vCommunication

vWireless LAN(*)

vMemory Test –Full

vMemory Test –Quick

vKeyboard

vVideo

vInternal Speaker

vMouse

vJoystick Test

vDiskette

vSystem Load

vCD-ROM/DVD Test

vStereo Speaker

v802.11 Wireless Radio

Test(*)

Notes:

vIn the Keyboard test in Interactive Tests, the Fn key

is scanned only once. Each key should be held down

for at least 2 seconds; otherwise, it cannot be sensed.

vThe sound card is not recognized in the Stereo

Speaker in the Interactive Tests. To test it, use the

audio device test in the Other Devices in

Diagnostics.

vVideo Adapter test supports only the LCD display on

ThinkPad. Before running PC-Doctor DOS, detach the

external Monitor.

vTo test ZIP Drive or LS-120/240 Drive, each media is

needed to be inserted before start testing.

vWireless LAN test and 802.11 Wireless Radio Test is

only for some models. Some models do not have

them.

vTo test Digital Signature Chip, the chip must be

enabled and initialized.

vWhen Legacy Floppy Drives is Enabled in the IBM

BIOS Setup Utility, Diskette Drives test is activated

even if no legacy diskette drive is attached to the

ThinkPad.

Checkout guide

General descriptions 33

Diagnostics Quit

Interactive Tests Hardware Info Utility F1=Help

Run Quick Test

Run Normal Test

Systemboard

CPU/Coprocessor

Video Adapter

Serial Ports

Diskette Drives

Fixed Disks

Parallel Ports

Other Devices

Use the cursor keys and ESC to move in menus. Press ENTER to select.

ZIP Drive

LS-120/240 Drive

Communication

Wireless LAN

Memory Test - Full

Memory Test - Quick

4. Run the applicable function test.

5. Follow the instructions on the screen. If there is a

problem, PC-Doctor shows messages describing it.

6. To exit the test, select Quit —Exit Diag.

To cancel the test, press Esc.

Note: After executing PC-Doctor, check the system

time/date and reset them if needed.

Detecting system information with

PC-Doctor

PC-Doctor can detect the following system information:

Hardware Info

vSystem Configuration

vMemory Contents

vPhysical Disk Drives

vLogical Disk Drives

vVGA Information

vIDE Drive Info

vPCI Information

vPNPISA Info

vSMBIOS Info

vVESA LCD Info

Utility

vRun External Tests

vSurface Scan Hard Disk

vBenchmark System

vDOS Shell

vTech Support Form

vBattery Rundown

vView Test Log

vPrint Log

vSave Log

vFull Erase Hard Drive

vQuick Erase Hard Drive

Checkout guide

34 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Power system checkout

To verify a symptom, do the following:

1. Power off the computer.

2. Remove the battery pack.

3. Connect the ac adapter.

4. Check that power is supplied when you power on the

computer.

5. Power off the computer.

6. Disconnect the ac adapter and install the charged

battery pack.

7. Check that the battery pack supplies power when you

power on the computer.

If you suspect a power problem, see the appropriate one

of the following power supply checkouts:

v“Checking the ac adapter”

v“Checking operational charging”on page 36

v“Checking the battery pack”on page 36

v“Checking the backup battery”on page 37

Checking the ac adapter

You are here because the computer fails only when the ac

adapter is used:

vIf the power problem occurs only when the port

replicator is used, replace the port replicator.

vIf the power-on indicator does not turn on, check the

power cord of the ac adapter for correct continuity and

installation.

vIf the computer does not charge during operation, go to

“Checking operational charging”.

To check the ac adapter, do the following:

1. Unplug the ac adapter cable from the computer.

2. Measure the output voltage at the plug of the ac

adapter cable. See the following figure:

(16-10V)

Pin Voltage (V dc)

1 +15.5 to +17.0

2 Ground

3. If the voltage is not correct, replace the ac adapter.

4. If the voltage is acceptable, do the following:

vReplace the system board.

vIf the problem persists, go to “Product overview”on

page 41.

Note: Noise from the ac adapter does not always indicate

a defect.

Checkout guide

General descriptions 35

Checking operational charging

To check whether the battery charges properly during

operation, use a discharged battery pack or a battery pack

that has less than 50% of the total power remaining when

installed in the computer.

Perform operational charging. If the battery status indicator

or icon does not turn on, remove the battery pack and let it

return to room temperature. Reinstall the battery pack. If

the charge indicator or icon still does not turn on, replace

the battery pack.

If the charge indicator still does not turn on, replace the

system board. Then reinstall the battery pack. If it is still

not charged, go to the next section.

Checking the battery pack

Battery charging does not start until the Power Meter

shows that less than 95% of the total power remains;

under this condition the battery pack can charge to 100%

of its capacity. This protects the battery pack from being

overcharged or from having a shortened life.

To check the status of your battery, move your cursor to

the Power Meter icon in the icon tray of the Windows

taskbar and wait for a moment (but do not click), and the

percentage of battery power remaining is displayed. To get

detailed information about the battery, double-click the

Power Meter icon.

Note: If the battery pack becomes hot, it may not be able

to charge. Remove it from the computer and leave it

at room temperature for a while. After it cools down,

reinstall and recharge it.

To check the battery pack, do the following:

1. Power off the computer.

2. Remove the battery pack and measure the voltage

between battery terminals 1 (+) and 5 (−). See the

following figure:

5(-)

1(+)

Terminal Voltage (V dc)

1 +0 to +12.6

5 Ground (−)

3. If the voltage is less than +11.0 V dc, the battery pack

has been discharged.

Checkout guide

36 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Note: Recharging will take at least 3 hours, even if the

indicator does not turn on.

If the voltage is still less than +11.0 V dc after

recharging, replace the battery.

4. If the voltage is more than +11.0 V dc, measure the

resistance between battery terminals 4 and 5. The

resistance must be 4 to 30 K .

If the resistance is not correct, replace the battery

pack. If the resistance is correct, replace the system

board.

Checking the backup battery

Do the following:

1. Power off the computer, and unplug the ac adapter

from it.

2. Turn the computer upside down.

3. Remove the battery pack (see “1010 Battery pack”on

page 60.)

4. Remove the backup battery (see “Checking the battery

pack”on page 36.)

5. Measure the voltage of the backup battery. See the

following figure.

Red (+)

Black (-)

Wire Voltage (V dc)

Red +2.5 to +3.2

Black Ground

vIf the voltage is correct, replace the system board.

vIf the voltage is not correct, replace the backup battery.

vIf the backup battery discharges quickly after

replacement, replace the system board.

Checkout guide

General descriptions 37

Checkout guide

38 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

ThinkPad T20, T21, T22 and T23

series

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

Specifications ............43

Status indicators ...........45

FRU Tests .............47

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

Restoring the serial number of the system unit 57

Retaining the UUID .........57

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

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

1020 Backup battery ..........61

1030 Hard-disk drive ..........63

1040 DIMM ............65

1050 Mini PCI adapter .........66

For T20, T21 and T22 series ......66

For T23 series ...........68

1060 Ethernet daughter card .......71

1070 Ultrabay 2000 device ........73

1080 Keyboard ...........74

For T20, T21 and T22 series ......74

For T23 series ...........75

1090 Keyboard CRU insulator .......82

1100 Hinge cover ...........83

For T20 and T21 series ........84

For T22 series ...........86

For T23 series ...........87

1110 Keyboard bezel ..........88

For T20, T21 and T22 series ......89

For T23 series ...........92

1120 Fan assembly ..........94

For T20, T21, T22 series........94

For T23 series ...........97

1130CPU.............98

For T20, T21 and T22 series ......98

For T23 series ...........99

1140 PC Card slot assembly .......100

For T20, T21, T22 series .......100

For T23 series ..........102

1150 Speaker ...........103

1160 Hard-disk bay ..........105

1170 Ultrabay 2000 slot ........107

For T20 series ..........107

For T21 and T22 series........108

For T23 series ..........111

1180 System board ..........113

For T20, T21, T22 series .......113

For T23 series ..........115

1190 Secure chip ..........117

1200 Microphone cable .........118

2010 LCD assembly..........121

2020 Front bezel...........122

2030 Inverter card ..........123

2040 LCD panel ...........125

2050 Antenna assembly ........128

2060 Sub card ...........131

3010 ThinkPad Dock PCI cover ......133

3020 ThinkPad Dock top cover ......136

Locations ..............140

Front view ............140

Rear view.............141

Bottom view ............142

Parts list . . ............143

T20, T21, T22 and T23 series model matrix 146

Overall .............147

For T20, T21 and T22 ........151

ForT23............156

AC adapters ............156

LCD FRUs ............157

13.3-in. XGA TFT .........157

14.1-in. XGA TFT .........158

14.1-in. SXGA+ TFT ........159

Keyboard .............160

Recovery CDs ...........161

For Windows 98 (T22 series) ......161

For Windows 2000 (T22 series) .....162

For Windows 2000/Windows NT (T22 series) 162

For Windows 98 (T23 series) ......163

For Windows 2000 (T23 series) .....164

For Windows 2000/Windows NT (T23 series) 165

For Windows XP (T23 series) ......166

Miscellaneous parts ..........170

Optional FRUs ...........171

Common parts list ..........172

Tools .............172

Power cords (system) ........172

Power cords (docking station) ......173

Notices . . ............174

Trademarks ............174

40 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Product overview

This section presents the following product-unique

information:

v“Specifications”

v“Status indicators”on page 44

v“FRU Tests”on page 46

v“Fn key combinations”on page 48

Specifications

The following table lists the specifications of the ThinkPad

T20, T21, T22 and T23 series :

Feature Description

Processor T20

vMobile Intel

Pentium

III processor 650 MHz

vMobile Intel

Pentium

III processor 700 MHz

vMobile Intel

Pentium

III processor 750 MHz

T21

vMobile Intel

Pentium

III processor 750 MHz

vMobile Intel

Pentium

III processor 800 MHz

vMobile Intel

Pentium

III processor 850 MHz

T22

vMobile Intel

Pentium

III processor 800 MHz

vMobile Intel

Pentium

III processor 900 MHz

vMobile Intel

Pentium

III processor 1 GHz

T23

vMobile Intel

Pentium

III processor 866

MHz-M

vMobile Intel

Pentium

III processor 1.0

GHz-M

vMobile Intel

Pentium

III processor 1.13

GHz-M

vMobile Intel

Pentium

III processor 1.2

GHz-M

Bus

architecture PCI Bus

Memory

(standard) T20, T21, T22

v128 MB (PC100) (on the system board)

T23

v128 MB (PC133) (on the system board)

v256 MB (PC133) (on the system board)

(continued)

Product overview

ThinkPad T20, T21, T22 and T23 series 41

Feature Description

Memory

(optional) T20, T21, T22

v64 MB, 128 MB, or 256 MB DIMM card

(maximum of 512 MB)

T23

v64 MB, 128 MB, 256 MB, or 512 MB DIMM

card (maximum of 1024 MB)

CMOS RAM 242 bytes

Display T20

v13.3-inch, 16M colors, XGA (1024×768

resolution) TFT color LCD

v14.1-inch, 16M colors, XGA (1024×768

resolution) TFT color LCD

T21, T22, T23

v13.3-inch, 16M colors, XGA (1024×768

resolution) TFT color LCD

v14.1-inch, 16M colors, XGA (1024×768

resolution) TFT color LCD

v14.1-inch, 16M colors, SXGA+ (1400×1050

resolution) TFT color LCD

Hard-disk drive T20

v6.0 GB, 2.5-inch, IDE interface

v12.0 GB, 2.5-inch, IDE interface

v18.0 GB, 2.5-inch, IDE interface

v20.0 GB, 2.5-inch, IDE interface

T21, T22

v10.0 GB, 2.5-inch, IDE interface

v20.0 GB, 2.5-inch, IDE interface

v32.0 GB, 2.5-inch, IDE interface

T23

v15.0 GB, 2.5-inch, IDE interface

v20.0 GB, 2.5-inch, IDE interface

v30.0 GB, 2.5-inch, IDE interface

v40.0 GB, 2.5-inch, IDE interface

v48.0 GB, 2.5-inch, IDE interface

v60.0 GB, 2.5-inch, IDE interface

I/O port vExternal monitor

vLine-in

vHeadphone

vMicrophone

vMouse or keyboard

vParallel or diskette drive

vPort replicator connector

vSerial

vOne universal serial bus (USB) connector for

T20, T21, and T22 series

vTwo USB connectors for T23

vRJ11

vRJ45 (covered)

vTV-out

(continued)

Product overview

42 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Feature Description

Internal

modem 56.6 Kbps

Audio vInternal microphone

vInternal speaker

vSoftware control volume

Infrared

transfer IrDA 1.1

802.11b (only

for T23 series) Mini PCI Type-IIIa IEEE 802.11b wireless LAN

card

PC Card One Type-III or two Type-II

AC adapter 72-watt type

Bay device T20

v1.44 MB (3-mode), 3.5-inch diskette drive

v10-24x CD-ROM drive

v6x DVD-ROM drive

T21, T22, T23

v1.44 MB (3-mode), 3.5-inch diskette drive

v10-24x CD-ROM drive

v8x DVD-ROM drive

vCD-RW drive

vDVD/CD-RW combo drive

Product overview

ThinkPad T20, T21, T22 and T23 series 43

Status indicators

The system status indicators show the status of the

computer, as follows:

1 2 3 4 5

6 7 8

Indicator Meaning

1 Drive in use Green: Data is being read from or written

to the hard-disk drive, the diskette

drive, or the drive in the Ultrabay

2000. When this indicator is on, do

not put the computer into standby

mode or turn off the computer.

Note: Do not move the system while the

Green drive in use light is on. Sudden physical

shock could cause drive errors.

2 Num lock Green: The numeric keypad on the

keyboard is enabled. To enable or

disable the keypad, press and hold

the Fn key while pressing the

NumLk key.

3 Caps lock Green: Caps Lock mode is enabled. To

enable or disable Caps Lock

mode, press Fn + Caps Lock key.

(continued)

Product overview

44 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Indicator Meaning

4 Scroll lock Green: Scroll Lock mode is enabled. Arrow

keys can be used as screen-scroll

function keys, but not to move the

cursor. To enable or disable Scroll

Lock mode, press Fn + ScrLk key.

Not all application programs

support this function.

5 Power on Green: This indicator stays lighted

whenever the computer is on. If

the power-on indicator is on and

the standby indicator is off, the

system is ready to use. If both the

power-on indicator and the standby

indicator are on, you can use the

computer after it returns from the

standby mode and the standby

indicator goes off.

6 Battery Green: The battery is fully charged.

Blinking green:

The battery has enough power to

operate, but is being charged.

Orange: The battery power is low. The

battery needs to be charged.

Blinking orange:

The battery needs to be charged

when the indicator starts blinking

orange, the computer beeps three

times.

7 Standby

status Green: The computer is in standby mode.

Blinking green:

The computer is entering standby

mode or hibernation mode, or is

resuming normal operation. This

indicator does not blink in Windows

2000, Windows Me, and Windows

XP.

8 Ultrabay

status Green: An Ultrabay 2000 device is

installed and in use.

Blinking green:

An Ultrabay 2000 device is in the

process of being detached.

Turn off: An Ultrabay 2000 device is ready

to be attached or detached.

Note: If you are using Windows 2000 or

Windows XP, the Ultrabay status indicator

does not blink while an Ultrabay 2000 device

is being detached. Instead, a message box

pops up when the process is completed; then

the indicator turns off.

Product overview

ThinkPad T20, T21, T22 and T23 series 45

FRU Tests

The following table shows the test for each FRU.

FRU Applicable test

System board 1. Diagnostics --> CPU/Coprocessor

2. Diagnostics --> Systemboard

Power Diagnostics --> Other Devices --> IBM AC

Adapter, IBM Battery 1 (IBM Battery 2)

LCD unit 1. Diagnostics --> Video Adapter

2. Interactive Tests --> Video

Modem 1. Make sure the modem is set up correctly.

2. Replace the modem jack and the modem

card in turn, and run the following test in

Diagnostics --> Communication:

a. Lucent Modem (M2) Loopback

b. Lucent Modem (M2) Dialtone/DTM

c. Lucent Soft Modem Loopback (T23

only)

d. Lucent Soft Modem Dialtone (T23 only)

e. Intel Modem Register

f. Intel Modem Loopback/DTMF

g. Intel SP Modem Register

h. Intel SP Modem Loopback/DTMF

i. 3Com MiniPCI Modem Test

j. 3Com MiniPCI Dialtone Test

Audio 1. Interactive Tests --> Internal Speaker

2. Diagnostics --> Other Devices --> Crystal

SoundFusion

™

Test

Speaker Interactive Tests --> Internal Speaker

PC Card slots Diagnostics --> Systemboard --> PCMCIA,

PCMCIA External Loop

Keyboard 1. Diagnostics --> Systemboard -->

Keyboard

2. Interactive Tests --> Keyboard

TrackPoint or

pointing device If the TrackPoint does not work, check the

configuration in the ThinkPad Configuration

program. If the TrackPoint is disabled, select

Enable to enable it.

After you use the TrackPoint, the pointer may

drift on the screen for a short time. This drift

can occur when a slight, steady pressure is

applied to the TrackPoint pointer. This symptom

is not a hardware problem. If the pointer stops

after a short time, no service action is

necessary.

If enabling the TrackPoint does not correct the

problem, continue with the following:

vInteractive Tests --> Mouse

Hard-disk drive Diagnostics --> Fixed Disks

(continued)

Product overview

46 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

FRU Applicable test

Diskette drive 1. Diagnostics --> Diskette Drives

2. Interactive Tests --> Diskette

CD-ROM, DVD,

CD-RW or

CD-RW/DVD

combo drive

1. Diagnostics --> Other Devices -->

CD-ROM/DVD

2. Interactive Tests --> CD-ROM/DVD Test

Memory 1. If two DIMMs are installed, remove one of

them and run Diagnostics --> Memory

Test - Quick.

2. If the problem does not recur, return the

DIMM to its place, remove the other one,

and run the test again.

3. If the test does not detect the error, run

Diagnostics --> Memory Test - Full.

Fan 1. Turn on the computer and check the air

turbulence at the louver near the power

switch.

2. Run Diagnostics --> Other Devices -->

IBM Fan.

Product overview

ThinkPad T20, T21, T22 and T23 series 47

Fn key combinations

The following table shows the function of each combination

of Fn with a function key.

Key

combination Description

Fn+F1 Reserved.

Fn+F2 Reserved.

Fn+F3 Turn off the LCD display, leaving the screen

blank. To turn the LCD display on again, press

any key or the TrackPoint stick.

Note: To use Fn+F3 for screen blank in

Windows 2000 and Windows XP, you must have

IBM PM device driver installed on your

computer.

Fn+F4 Turn standby mode on. To return to normal

operation, press the Fn key independently,

without pressing a function key.

Fn+F5 Reserved.

Fn+F6 Reserved.

Fn+F7 Switch between the LCD and an external

monitor (CRT). If an external monitor is

attached, computer output is displayed in the

following three patterns by turns:

vCRT display

vLCD+CRT display

vLCD

Fn+F8 Turn screen expansion on or off. (There is no

symbol on the key.)

Note: This function is not supported in Windows

2000 and Windows XP.

Fn+F9 Reserved.

Fn+F10 Reserved.

Fn+F11 Reserved.

Fn+F12 Turn hibernation mode on. To return to normal

operation, press the power button for less than

four seconds.

Note: To use Fn+F12 for hibernation in

Windows 2000 and Windows XP, you must have

IBM PM device driver installed on your

computer.

Fn+PgUp Turn the ThinkLight on or off.

Fn+Home The LCD becomes brighter.

Fn+End The LCD becomes less bright.

Product overview

48 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Symptom-to-FRU index

The symptom-to-FRU index in this section lists symptoms

and errors and their possible causes. The most likely

cause is listed first, in boldface type.

Note: Do the FRU replacement or other actions in the

sequence shown in the column headed “FRU or

action, in sequence.”If replacing a FRU does not

solve the problem, put the original part back in the

computer. Do not replace a nondefective FRU.

This index can also help you determine, during regular

servicing, what FRUs are likely to need to be replaced

next.

A numeric error is displayed for each error detected in

POST or system operation. In the displays, ncan be any

number.

If no numeric code is displayed, check the narrative

descriptions of symptoms. If the symptom is not described

there, go to “Intermittent problems”on page 55.

Note

For an IBM device not supported by diagnostic

codes in the ThinkPad notebook computers, see the

manual for that device.

Numeric error codes

Symptom or error FRU or action, in sequence

0175

Bad CRC1, stop POST

task—The EEPROM checksum

is not correct.

System board.

0187

EAIA data access error—The

access to EEPROM is failed.

System board.

0188

Invalid RFID serialization

information area or bad

CRC2—The EEPROM

checksum is not correct.

System board.

0189

Invalid RFID configuration

information area—The

EEPROM checksum is not

correct.

System board.

0190

Critical low-battery error 1. Charge the battery pack.

2. Battery pack.

Symptom-to-FRU index

ThinkPad T20, T21, T22 and T23 series 49

Symptom or error FRU or action, in sequence

0193

RF antenna has been removed Enter the supervisor

password.

0194

The computer has been carried

through a security gate

Enter the supervisor

password.

0195

Security hardware tamper

detected

1. Enter IBM BIOS Setup

Utility by entering

supervisor password, and

select “Password”-->

“IBM Security Chip”-->

“Clear IBM Security Chip”

to clear this error.

2. Security chip.

3. System board.

0196

Security hardware removed 1. Enter IBM BIOS Setup

Utility by entering

supervisor password, and

select “Password”-->

“IBM Security Chip”-->

“Clear IBM Security Chip”

to clear this error.

2. Security chip.

3. System board.

0197

Invalid remote change

requested

The remote configuration for

the security chip has failed.

Confirm the operation and try

again.

01C9

More than one Ethernet devices

are found. Remove one of

them. Press <Esc> to continue.

1. Remove the Ethernet

device that you installed;

or press Esc to ignore the

warning message.

2. System board.

0200

Hard disk error—The hard disk

is not working.

1. Reseat the hard-disk

drive.

2. Load Setup Defaults in IBM

BIOS Setup Utility.

3. Hard-disk drive.

4. System board.

021x

Keyboard error Run interactive tests of the

keyboard and the auxiliary

input device.

0220

Monitor type error—Monitor

type does not match the one

specified in CMOS.

Load Setup Defaults in IBM

BIOS Setup Utility.

0230

Shadow RAM error—Shadow

RAM fails at offset nnnn.

System board.

0231

System RAM error—System

RAM fails at offset nnnn.

1. DIMM.

2. System board.

Symptom-to-FRU index

50 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Symptom or error FRU or action, in sequence

0232

Extended RAM

error—Extended RAM fails at

offset nnnn.

1. DIMM.

2. System board.

0250

System battery error—System

battery is dead.

Replace the backup battery

and run IBM BIOS Setup

Utility to reset the time and

date.

0251

System CMOS checksum

bad—Default configuration

used.

Replace the backup battery

and run IBM BIOS Setup

Utility to reset the time and

date.

0252

Password checksum bad—The

password is cleared.

Reset the password by

running IBM BIOS Setup

Utility.

0260

System timer error 1. Replace the backup

battery and run IBM BIOS

Setup Utility to reset the

time and date.

2. System board.

0270

Real time clock error 1. Replace the backup

battery and run IBM BIOS

Setup Utility to reset the

time and date.

2. System board.

0271

Date and time error—Neither

the date nor the time is set in

the computer.

Run IBM BIOS Setup Utility to

reset the time and date.

02B2

Incorrect drive A type 1. Diskette drive.

2. External FDD cable.

3. I/O card.

02F4

EISA CMOS not writable 1. Load Setup Defaults in

IBM BIOS Setup Utility.

2. Replace the backup battery.

3. System board.

02F5

DMA test failed 1. DIMM.

2. System board.

02F6

Software NMI failed 1. DIMM.

2. System board.

02F7

Fail-safe timer NMI failed 1. DIMM.

2. System board.

Symptom-to-FRU index

ThinkPad T20, T21, T22 and T23 series 51

Error messages

Symptom or error FRU or action, in sequence

Device address conflict. 1. Load “Setup Defaults”in

IBM BIOS Setup Utility.

2. Backup battery.

3. System board.

Allocation error for device. 1. Load “Setup Defaults”in

IBM BIOS Setup Utility.

2. Backup battery.

3. System board.

Failing bits: nnnn. 1. DIMM.

2. System board.

Invalid system configuration

data. 1. DIMM.

2. System board.

I/O device IRQ conflict. 1. Load “Setup Defaults”in

IBM BIOS Setup Utility.

2. Backup battery.

3. System board.

Operating system not found. 1. Check that the operating

system has no failure and is

installed correctly.

2. Enter IBM BIOS Setup

Utility and see whether

the hard-disk drive and

the diskette drive are

properly identified.

3. Reseat the hard-disk drive.

4. Reinstall the operating

system.

5. Diskette drive.

6. Hard-disk drive.

7. System board.

Hibernation error. 1. Restore the system

configuration to what it

was before the computer

entered hibernation mode.

2. If memory size has been

changed, re-create the

hibernation file.

Fan error. Fan.

Thermal sensing error. System board.

Symptom-to-FRU index

52 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Beep symptoms

Symptom or error FRU or action, in sequence

One beep and a blank,

unreadable, or flashing LCD. 1. Reseat the LCD

connector.

2. LCD assembly.

3. External CRT.

4. System board.

One long and two short beeps,

and a blank or unreadable

LCD.

1. System board.

2. LCD assembly.

3. DIMM.

Two short beeps with error

codes. POST error. See “Numeric

error codes”on page 49.

Two short beeps and a blank

screen. 1. System board.

2. DIMM.

Two or more beeps, or a

continuous beep. Operating

system starts successfully.

If a mini-PCI Ethernet card is

installed, confirm that Alert On

LAN 2 in IBM BIOS Setup

Utility is disabled.

Three short beeps, pause,

three more short beeps, and

one short beep.

1. DIMM.

2. System board

One short beep, pause, three

short beeps, pause, three more

short beeps, and one short

beep.

Only cursor appears. Reinstall operating system.

No-beep symptoms

Symptom or error FRU or action, in sequence

No beep, power-on indicator

on, LCD blank, and no POST. 1. Make sure that every

connector is connected

tightly and correctly.

2. DIMM.

3. System board.

No beep, power-on indicator

on, and LCD blank during

POST.

1. Reseat DIMM.

2. System board.

The power-on password prompt

appears. A power-on password or a

supervisor password is set.

Type the password and press

Enter.

The hard-disk password prompt

appears. A hard-disk password is set.

Type the password and press

Enter.

The DOS full screen looks

smaller. Start the ThinkPad

Configuration program and set

the Screen expansion

function.

Symptom-to-FRU index

ThinkPad T20, T21, T22 and T23 series 53

LCD-related symptoms

Important

The TFT LCD for the notebook computer contains

many thin-film transistors (TFTs). A small number of

dots that are missing, discolored, or always lighted

is characteristic of TFT LCD technology, but

excessive pixel problems can cause viewing

concerns. The LCD should be replaced if the

number of missing, discolored, or lighted dots in any

background is:

vXGA: 8 or more bright dots, 8 or more dark dots,

or a total of 9 or more bright and dark dots.

vSXGA+: 11 or more bright dots, 13 or more dark

dots, or a total of 16 or more bright and dark

dots.

Note: A bright dot means a pixel is always on

(white or color.) A dark dot means a pixel is

always off (black color.)

Symptom or error FRU or action, in sequence

No beep, power-on indicator

on, and a blank LCD during

POST.

System board.

vLCD backlight not working.

vLCD too dark.

vLCD brightness cannot be

adjusted.

vLCD contrast cannot be

adjusted.

1. Reseat the LCD

connectors.

2. LCD assembly.

3. System board.

vLCD screen unreadable.

vCharacters missing pixels.

vScreen abnormal.

vWrong color displayed.

1. See important note for

“LCD-related symptoms.”

2. Reseat all LCD connectors.

3. LCD assembly.

4. System board.

Horizontal or vertical lines

displayed on LCD. LCD assembly.

Symptom-to-FRU index

54 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Intermittent problems

Intermittent system hang problems can be due to a variety

of causes that have nothing to do with a hardware defect,

such as cosmic radiation, electrostatic discharge, or

software errors. FRU replacement should be considered

only when a problem recurs.

When analyzing an intermittent problem, do the following:

1. Run the diagnostic test for the system board in loop

mode at least 10 times.

2. If no error is detected, do not replace any FRUs.

3. If any error is detected, replace the FRU shown by the

FRU code. Rerun the test to verify that no more errors

exist.

Undetermined problems

You are here because the diagnostic tests did not identify

which adapter or device failed, wrong devices are installed,

a short circuit is suspected, or the system is inoperative.

Follow these procedures to isolate the failing FRU (do not

isolate FRUs that have no defects).

Verify that all attached devices are supported by the

computer.

Verify that the power supply being used at the time of the

failure is operating correctly. (See “Power system

checkout”on page 35.)

1. Power off the computer.

2. Visually check each FRU for damage. Replace any

damaged FRU.

3. Remove or disconnect all of the following devices:

a. Non-IBM devices

b. Devices attached to the port replicator

c. Printer, mouse, and other external devices

d. Battery pack

e. Hard-disk drive

f. External diskette drive

g. DIMM

h. CD-ROM and diskette drive in the Ultrabay

i. PC Cards

4. Power on the computer.

5. Determine whether the problem has changed.

6. If the problem does not recur, reconnect the removed

devices one at a time until you find the failing FRU.

7. If the problem remains, replace the following FRUs one

at a time (do not replace a nondefective FRU):

a. System board

b. LCD assembly

Symptom-to-FRU index

ThinkPad T20, T21, T22 and T23 series 55

FRU replacement notices

This section contains notices related to removing and

replacing parts. Read this section carefully before replacing

any FRU.

Screw notices

Loose screws can cause a reliability problem. In IBM

ThinkPad computer, this problem is addressed with special

nylon-coated screws that have the following characteristics:

vThey maintain tight connections.

vThey do not easily come loose, even with shock or

vibration.

vThey are harder to tighten.

vThey should be used only once.

Do the following when you service this machine:

vKeep the screw kit (for the P/N, see “Miscellaneous

parts”on page 167) in your tool bag.

vAlways use new screws.

vUse a torque screwdriver if you have one.

Tighten screws as follows:

vPlastic to plastic

Turn an additional 90 degrees after the screw head

touches the surface of the plastic part:

90 degrees more

(Cross-section)

vLogic card to plastic

Turn an additional 180 degrees after the screw head

touches the surface of the logic card:

180 degrees more

(Cross-section)

vTorque driver

If you have a torque driver, refer to the “Torque”column

for each step.

FRU replacement notices

56 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

vMake sure you use the correct screw. If you have a

torque screwdriver, tighten all screws firmly to the torque

shown in the table. Never use a screw that you

removed. Use a new one. Make sure the screws are

tightened firmly.

Retaining serial numbers

This section includes the following descriptions:

v“Restoring the serial number of the system unit”

v“Retaining the UUID”

Restoring the serial number of the system

unit

When the computer was manufactured, the EEPROM on

the system board was loaded with the serial numbers of

the system and all major components. These numbers

need to remain the same throughout the life of the

computer.

If you replace the system board, you must restore the

serial number of the system unit to its original value.

Before replacing the system board, save the original serial

number by doing the following:

1. Install the ThinkPad hardware maintenance diskette

version 1.62, and restart the computer.

2. From the main menu, select 1. Set System

Identification.

3. Select 2. Read S/N data from EEPROM.

The serial number for each device is displayed. Write

down the serial number of the system unit, designated as

follows:

20: System unit serial number

After you have replaced the system board, restore the

serial number by doing the following:

1. Install the ThinkPad hardware maintenance diskette

version 1.62 and restart the computer.

2. From the main menu, select 1. Set System

Identification.

3. Select 1. Add S/N data from EEPROM.

Follow the instructions on the screen.

Note: The serial number of the system unit is written on

the label attached on the bottom of the computer.

Retaining the UUID

The Universally Unique Identifier (UUID) is a 128-bit

number uniquely assigned to your computer at production

FRU replacement notices

ThinkPad T20, T21, T22 and T23 series 57

and stored in the EEPROM of your system board. The

algorithm that generates the number is designed to provide

unique IDs until the year A.D. 3400. No two computers in

the world have the same number.

When you replace the system board, you must set the

UUID on the new system board as follows:

1. Install the ThinkPad hardware maintenance diskette

version 1.62, and restart the computer.

2. From the main menu, select 4. Assign UUID.

A new UUID is created and written. If a valid UUID

already exists, it is not overwritten.

FRU replacement notices

58 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Removing and replacing a FRU

This section presents directions and drawings for use in

removing and replacing a FRU. Be sure to observe the

following general rules:

1. Do not try to service any computer unless you have

been trained and certified. An untrained person runs

the risk of damaging parts.

2. Before replacing any FRU, review “FRU replacement

notices”on page 56.

3. Begin by removing any FRUs that have to be removed

before the failing FRU. Any such FRUs are listed at the

top of the page. Remove them in the order in which

they are listed.

4. Follow the correct sequence in the steps for removing

the FRU, as indicated in the drawings by the numbers

in square callouts.

5. When turning a screw to replace a FRU, turn it in the

direction indicated by the arrow in the drawing.

6. When removing the FRU, move it in the direction

indicated by the arrow in the drawing.

7. To put the new FRU in place, reverse the removal

procedure and follow any notes that pertain to

replacement. For information about connecting and

arranging internal cables, see “Locations”on page 140.

8. When replacing a FRU, use the correct screw as

shown in the procedures.

DANGER

Attention: Before the computer is powered on after FRU

replacement, make sure that all screws, springs, and other

small parts are in place and are not loose inside the

computer. Verify this by shaking the computer gently and

listening for rattling sounds. Metallic parts or metal flakes

can cause electrical short circuits.

Attention: The system board is sensitive to, and can be

damaged by, electrostatic discharge. Before touching it,

establish personal grounding by touching a ground point

with one hand or by using an electrostatic discharge (ESD)

strap (P/N 6405959).

Before removing any FRU, power off the computer,

unplug all power cords from electrical outlets,

remove the battery pack, and then disconnect any

interconnecting cables.

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 59

1010 Battery pack

DANGER

Use only the battery in the parts listing for your

computer. Use of an incorrect battery can result in

ignition or explosion of the battery.

Removing and replacing a FRU

60 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

1020 Backup battery

DANGER

For access, remove this FRU:

v“1010 Battery pack”on page 60

Step Screw (quantity) Torque

1 M2.5 ×3.5 mm, (1) 0.392 Nm

(4 kgfcm)

(continued)

Use only the battery in the parts listing for your

computer. Use of an incorrect battery can result in

ignition or explosion of the battery.

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 61

Cable routing: When attaching the backup battery to the

holder, route the battery cable as in the

following figure.

Removing and replacing a FRU

62 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

1030 Hard-disk drive

Attention

Do not drop or apply any shock to the hard-disk

drive. The hard-disk drive is sensitive to physical

shock. Incorrect handling can cause damage and

permanent loss of data.

Before removing the drive, have the user make a

backup copy of all the information on the drive if

possible.

Never remove the drive while the system is

operating or is in suspend mode.

For access, remove this FRU:

v“1010 Battery pack”on page 60

Note: The hard disk is attached to the cover.

Step Screw (quantity)

1 Coin screw (1) or security screw (1)

Note: Use a 2.5-mm Allen wrench to remove the security screw.

(continued)

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 63

When removing the hard-disk drive, open the LCD a little

as shown in the figure.

When installing: Make sure that the HDD connector is

firmly connected.

Removing and replacing a FRU

64 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

1040 DIMM

For access, remove this FRU:

v“1010 Battery pack”on page 60

Note: Loosen the screw 1, but do not remove it.

When installing: With the notched end of the DIMM

toward the socket, insert the DIMM into

the socket, and then press it firmly. Pivot

the DIMM until it snaps into place. Make

sure that the card is firmly fixed in the

slot and does not move easily.

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 65

1050 Mini PCI adapter

For access, remove this FRU:

v“1010 Battery pack”on page 60

For T20, T21 and T22 series

Note: Loosen the screw 1, but do not remove it.

(continued)

Removing and replacing a FRU

66 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Note: The following illustration shows the combo card.

Connector (A) is for the LAN feature and (B) is for

the modem feature. Disconnect either (A) or (B) in

step 6. This slot also supports a Mini PCI modem

card or Mini PCI network card.

(A)

(B)

(A)

(B)

(continued)

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 67

When installing: Make sure not to pinch the connector

cable when re-installing the Mini PCI

adapter.

For T23 series

Note: Loosen the screw 1, but do not remove it.

(continued)

Removing and replacing a FRU

68 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

In step 3a and 3b, pull the tab of the each antenna

cables to unplug the cables.

When installing: Plug the gray antenna cable 3a into

jack J1 (MAIN), and the black antenna

cable 3b into jack J2 (AUX).

When installing: With the notched end of the card toward

the socket, insert the card into the

socket, and then press it firmly. Pivot the

card until it snaps into place. Make sure

that the card is firmly fixed in the slot

and does not move easily.

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 69

1060 Ethernet daughter card

Note

This section is only for the following models of T23

series;

vAll models of MT2647 excepting xQx, L4x

vAll models of MT2648

Other models do not have the Ethernet daughter

card (EDC).

For access, remove this FRU:

v“1010 Battery pack”on page 60

Note: Loosen the screw 1, but do not remove it.

(continued)

Removing and replacing a FRU

70 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Step Screw (quantity) Torque

3 M2.5 ×11.5 mm, nylon-coated (2) 0.392 Nm

(4 kgfcm)

(continued)

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 71

When installing: Make sure that both of the connectors

4 and 6 are firmly attached.

Removing and replacing a FRU

72 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

1070 Ultrabay 2000 device

Any of several devices can be inserted into the Ultrabay

2000. The procedure for installing and removing is the

same for every device.

Ultrabay 2000 also supports Ultrabay Plus device, such as

Ultrabay Plus carrier.

Note: When you release the switch in step 1 the lever

pops out. Pull the lever a little in step 2 to release

the device from the bay.

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 73

1080 Keyboard

For access, remove these FRUs, in order:

v“1010 Battery pack”on page 60

v“1020 Backup battery”on page 61

v“1030 Hard-disk drive”on page 63

v“1070 Ultrabay 2000 device”on page 73

For T20, T21 and T22 series

Step Screw (quantity) Torque

1 M2.5 ×14 mm, nylon-coated (2) 0.392 Nm

(4 kgfcm)

Note: T20, T21 and T22 series do not have the removal

procedures 2 to 4. After step 1, go to step

5.

(continued)

Removing and replacing a FRU

74 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

For T23 series

Note: Loosen the screw 2, but do not remove it.

Step Screw (quantity) Torque

1 M2.5 ×14 mm, nylon-coated (2) 0.392 Nm

(4 kgfcm)

Step Screw (quantity) Torque

4 M2.5 ×11.5 mm, nylon-coated (1) 0.392 Nm

(4 kgfcm)

(continued)

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 75

Note: Step 5 to 10 are common for all models.

(continued)

Removing and replacing a FRU

76 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

(continued)

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 77

Note: Before installing a new keyboard, attach the

easy-button cover as follows:

(continued)

Removing and replacing a FRU

78 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

When installing the keyboard, do as follows:

1. Install the new keyboard, following the directions in the

figure. Make sure that the keyboard edges, shown in

the figure as (A),(B), and (C), are under the frame.

(A) (B)

(C)

(continued)

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 79

2. Insert your fingers into the PC Card slot on the left of

the computer and the Ultrabay 2000 slot on the right of

the computer as shown in 1 . Then, with your fingers

in those slots as in 2, latch the keyboard in place by

using your thumbs to press firmly on the shift keys.

Press the Y key to connect the keyboard to the

connector on the underside of the key 3.

(continued)

Removing and replacing a FRU

80 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

3. To make sure that the front side of the keyboard is

housed firmly, gently press the shift keys with your

thumbs and try to slide the keyboard towards you. Do

not push parts (A) and (B) on the keyboard strongly; to

do so might cause distortion of the Ultrabay 2000 slot

and the PC Card slot.

(A)

(B)

4. Replace the screws, using the new screws provided

with the keyboard. Then press the Y key again, hard,

to make sure that the keyboard is firmly connected.

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 81

1090 Keyboard CRU insulator

For access, remove these FRUs, in order:

v“1010 Battery pack”on page 60

v“1020 Backup battery”on page 61

v“1030 Hard-disk drive”on page 63

v“1070 Ultrabay 2000 device”on page 73

v“1080 Keyboard”on page 74

Note: The shape of the keyboard CRU insulator varies

from model to model. In some models, the shape

might be slightly different from the insulator in this

figure.

Removing and replacing a FRU

82 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

1100 Hinge cover

For access, remove these FRUs, in order:

v“1010 Battery pack”on page 60

v“1020 Backup battery”on page 61

v“1030 Hard-disk drive”on page 63

v“1070 Ultrabay 2000 device”on page 73

v“1080 Keyboard”on page 74

v“1090 Keyboard CRU insulator”on page 82

Note: Step 1 is common for all models.

Step Screw (quantity) Torque

1 M2.5 ×14 mm, nylon-coated (3) 0.392 Nm

(4 kgfcm)

(continued)

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 83

For T20 and T21 series

a a

Step Screw (quantity) Torque

2 M2.5 ×4.8 mm, nylon-coated (1) 0.392 Nm

(4 kgfcm)

When installing:

1. Install the hinge cover according to the step 3,4

and then tighten the screw 2. In step 3, take care

not to damage the lens.

2. Make sure that both latches a are firmly attached

and snap into place.

Removing and replacing a FRU

84 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

For T22 series

Step Screw (quantity) Torque

2 M2.5 ×14 mm, nylon-coated (1) 0.392 Nm

(4 kgfcm)

(continued)

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 85

Step Screw (quantity) Torque

4 M2.5 ×4.8 mm, nylon-coated (1) 0.392 Nm

(4 kgfcm)

When installing:

1. Install the hinge cover according to the step 5,6

and then tighten the screw 4. In step 5, take care

not to damage the lens.

2. Make sure that both latches a are firmly attached

and snap into place.

Removing and replacing a FRU

86 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

For T23 series

Step Screw (quantity) Torque

2 M2.5 ×4.8 mm, nylon-coated (1) 0.392 Nm

(4 kgfcm)

When installing:

1. Install the hinge cover according to the step 3,4

and then tighten the screw 2. In step 3, take care

not to damage the lens.

2. Make sure that both latches a are firmly attached

and snap into place.

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 87

1110 Keyboard bezel

For access, remove these FRUs, in order:

v“1010 Battery pack”on page 60

v“1020 Backup battery”on page 61

v“1030 Hard-disk drive”on page 63

v“1070 Ultrabay 2000 device”on page 73

v“1080 Keyboard”on page 74

v“1090 Keyboard CRU insulator”on page 82

v“1100 Hinge cover”on page 83

For T20, T21 and T22 series

Step Screw (quantity) Torque

1 M2.5 ×3.5 mm, nylon-coated (3) 0.392 Nm

(4 kgfcm)

(continued)

Removing and replacing a FRU

88 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Step Screw (quantity) Torque

2 M2.5 ×14 mm, nylon-coated (1) 0.392 Nm

(4 kgfcm)

3 M2.5 ×4.8 mm, nylon-coated (1) 0.392 Nm

(4 kgfcm)

(continued)

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 89

For T23 series

Note: Loosen the screw 1, but do not remove it.

Step Screw (quantity) Torque

3 M2.5 ×11.5 mm, nylon-coated (1) 0.392 Nm

(4 kgfcm)

(continued)

Removing and replacing a FRU

90 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Step Screw (quantity) Torque

4 M2.5 ×3.5 mm, nylon-coated (3) 0.392 Nm

(4 kgfcm)

(continued)

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 91

Step Screw (quantity) Torque

5 M2.5 ×14 mm, nylon-coated (1) 0.392 Nm

(4 kgfcm)

6 M2.5 ×4.8 mm, nylon-coated (1) 0.392 Nm

(4 kgfcm)

Removing and replacing a FRU

92 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

When installing, do as follows:

vMake sure that the a-part is firmly attached as shown

in the figure.

vMake sure that all of the latches of the keyboard bezel

bare firmly attached.

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 93

1120 Fan assembly

For T20, T21, T22 series

For access, remove these FRUs, in order:

v“1010 Battery pack”on page 60

v“1020 Backup battery”on page 61

v“1030 Hard-disk drive”on page 63

v“1070 Ultrabay 2000 device”on page 73

v“1080 Keyboard”on page 74

v“1090 Keyboard CRU insulator”on page 82

Notes:

1. a-part is for T21, T22 series only. Other models do

not have this bracket.

2. b -part is for T21 series and MT2647-3Cx, -3Ex,

-7Cx, -7Ex (T22 series) only. Other models do not have

this bracket.

Step Screw (quantity) Torque

1 M2 ×13.5 mm, nylon-coated (4) 0.245 Nm

(2.5 kgfcm)

(continued)

Removing and replacing a FRU

94 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

When installing the fan assembly:

For T20

Remove the protective sheet from the thermal rubber

on the fan assembly.

For T21, T22

Apply the thermal grease (05K5751) on the a-part of

the fan as shown in the following figure.

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 95

For T23 series

For access, remove these FRUs, in order:

v“1010 Battery pack”on page 60

v“1020 Backup battery”on page 61

v“1030 Hard-disk drive”on page 63

v“1070 Ultrabay 2000 device”on page 73

v“1080 Keyboard”on page 74

v“1090 Keyboard CRU insulator”on page 82

v“1100 Hinge cover”on page 83

v“1110 Keyboard bezel”on page 88

Step Screw (quantity) Torque

1 M2 ×13.5 mm, nylon-coated (1) 0.245 Nm

(2.5 kgfcm)

2 M2.5 ×14 mm, nylon-coated (1) 0.392 Nm

(4 kgfcm)

(continued)

Removing and replacing a FRU

96 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Step Screw (quantity) Torque

4 M2.0 ×13.5 mm, nylon-coated (3) 0.245 Nm

(2.5 kgfcm)

When installing: Apply the thermal grease (05K5751) on

the a-part of the fan as shown in the

following figure.

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 97

1130 CPU

For access, remove these FRUs, in order:

v“1010 Battery pack”on page 60

v“1020 Backup battery”on page 61

v“1030 Hard-disk drive”on page 63

v“1070 Ultrabay 2000 device”on page 73

v“1080 Keyboard”on page 74

v“1090 Keyboard CRU insulator”on page 82

v“1120 Fan assembly”on page 94

For T20, T21 and T22 series

Rotate the the head of the screw (A) to the direction of the

arrow a to release the lock and then remove the CPU.

When installing:

1. When attaching the CPU to the socket, do as shown in

the step c.

2. Rotate the head of the screw (A) to the direction of the

arrow b to lock the CPU.

Removing and replacing a FRU

98 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

For T23 series

Note: The shape of the CPU socket vary from model to

model. When removing or installing the CPU,

confirm the shape of the CPU socket and do either

steps 1,2 and a or steps 1',2 and a'.

Rotate the head of the screw to the direction of the arrow

1 or 1' to release the lock and then remove the CPU.

When installing: Rotate the head of the screw to the

direction of the arrow a or a' to lock

the CPU.

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 99

1140 PC Card slot assembly

For T20, T21, T22 series

For access, remove these FRUs, in order:

v“1010 Battery pack”on page 60

v“1020 Backup battery”on page 61

v“1030 Hard-disk drive”on page 63

v“1070 Ultrabay 2000 device”on page 73

v“1080 Keyboard”on page 74

v“1090 Keyboard CRU insulator”on page 82

Step Screw (quantity) Torque

1 M2 ×13.5 mm, nylon-coated (4) 0.245 Nm

(2.5 kgfcm)

(continued)

Removing and replacing a FRU

100 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

When installing the PC card slot assembly, do as shown in

the figure.

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 101

For T23 series

For access, remove these FRUs, in order:

v“1010 Battery pack”on page 60

v“1020 Backup battery”on page 61

v“1030 Hard-disk drive”on page 63

v“1070 Ultrabay 2000 device”on page 73

v“1080 Keyboard”on page 74

v“1090 Keyboard CRU insulator”on page 82

v“1100 Hinge cover”on page 83

v“1110 Keyboard bezel”on page 88

1 1

Step Screw (quantity) Torque

1 M2 ×13.5 mm, nylon-coated (4) 0.245 Nm

(2.5 kgfcm)

Removing and replacing a FRU

102 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

1150 Speaker

For access, remove these FRUs, in order:

v“1010 Battery pack”on page 60

v“1020 Backup battery”on page 61

v“1030 Hard-disk drive”on page 63

v“1070 Ultrabay 2000 device”on page 73

v“1080 Keyboard”on page 74

v“1090 Keyboard CRU insulator”on page 82

v“1100 Hinge cover”on page 83

v“1110 Keyboard bezel”on page 88

Step Screw (quantity) Torque

1 M2.5 ×14 mm, nylon-coated (2) 0.392 Nm

(4 kgfcm)

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 103

Before installing new speaker for T22 and T23 series:

Secure speaker RF bracket (a) to the new speaker with

an adhesive tape inside of the bracket.

For T22 series

For T23 series

Removing and replacing a FRU

104 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

1160 Hard-disk bay

For access, remove these FRUs, in order:

v“1010 Battery pack”on page 60

v“1020 Backup battery”on page 61

v“1030 Hard-disk drive”on page 63

v“1070 Ultrabay 2000 device”on page 73

v“1080 Keyboard”on page 74

v“1090 Keyboard CRU insulator”on page 82

v“1100 Hinge cover”on page 83

v“1110 Keyboard bezel”on page 88

v“1150 Speaker”on page 103

Note: Step 3 and 4 are only for the case when Asset

ID RF adapter has been attached into the hard-disk

bay.

Step Screw (quantity) Torque

1 M2.5 ×4.8 mm, nylon-coated (1) 0.392 Nm

(4 kgfcm)

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 105

When installing: Make sure the followings:

va-parts of the insulation do not come off.

vb-part (b's are only for T23 series) is not turned

over.

vHoles in the guide rail and in the aluminium sheet are

aligned, and the aluminium sheet does not protrude in

the c-parts. The protruding parts of the sheet can

cause electrical short.

Removing and replacing a FRU

106 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

1170 Ultrabay 2000 slot

For access, remove these FRUs, in order:

v“1010 Battery pack”on page 60

v“1020 Backup battery”on page 61

v“1030 Hard-disk drive”on page 63

v“1070 Ultrabay 2000 device”on page 73

v“1080 Keyboard”on page 74

v“1090 Keyboard CRU insulator”on page 82

v“1100 Hinge cover”on page 83

v“1110 Keyboard bezel”on page 88

For T20 series

Step Screw (quantity) Torque

1 M2.5 ×14 mm, nylon-coated (1) 0.392 Nm

(4 kgfcm)

Note: T20 series do not have the removal procedure 3

and 4. After step 2, go to step 5.

When installing: Make sure that the FPC connector is

firmly attached.

(continued)

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 107

For T21 and T22 series

Note: T21 series do not have the removal procedure 3

and 4. After step 2, go to step 5.

When installing: Make sure that the FPC connector is

firmly attached.

(continued)

Removing and replacing a FRU

108 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

For T23 series

Step Screw (quantity) Torque

1 M2 ×13.5 mm, nylon-coated (1) 0.245 Nm

(2.5 kgfcm)

2 M2.5 ×14 mm, nylon-coated (1) 0.392 Nm

(4 kgfcm)

(continued)

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 109

Note: The models with 13.3-in. XGA LCD in T20 series

and in T21 series do not have FPC bracket (5).

For those models, skip step 5.

When installing: Make sure that the FPC bracket is firmly

attached as shown in the figure a.

(continued)

Removing and replacing a FRU

110 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Note: Step 6 to step 9 are common for T20, T21, T22

and T23 series.

Step Screw (quantity) Torque

6 M2.5 ×4.8 mm, nylon-coated (1) 0.392 Nm

(4 kgfcm)

Step Screw (quantity) Torque

7 M2 ×13.5 mm, nylon-coated (2) 0.245 Nm

(2.5 kgfcm)

8 M2.5 ×4.8 mm, nylon-coated (2) 0.392 Nm

(4 kgfcm)

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 111

When installing: Make sure that the guide of the slot is

firmly attached 1and if the eject lever

has been poped out, push it back in the

direction of arrow 2 until it snaps, and

then push the upper-right corner of the

slot 3 to fix it firmly.

Removing and replacing a FRU

112 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

1180 System board

For access, remove these FRUs, in order:

v“1010 Battery pack”on page 60

v“1020 Backup battery”on page 61

v“1030 Hard-disk drive”on page 63

v“1040 DIMM”on page 65

v“1050 Mini PCI adapter”on page 66

v“1060 Ethernet daughter card”on page 70 (only for T23

series)

v“1070 Ultrabay 2000 device”on page 73

v“1080 Keyboard”on page 74

v“1090 Keyboard CRU insulator”on page 82

v“1100 Hinge cover”on page 83

v“1110 Keyboard bezel”on page 88

v“1120 Fan assembly”on page 94

v“1130 CPU”on page 98

v“1140 PC Card slot assembly”on page 100

v“1150 Speaker”on page 103

v“1160 Hard-disk bay”on page 105

v“1170 Ultrabay 2000 slot”on page 107

For T20, T21, T22 series

Step Screw (quantity) Torque

4 M2.5 ×4.8 mm, nylon-coated (1) 0.392 Nm

(4 kgfcm)

(continued)

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 113

When installing: Make sure that all of the guides are

firmly attached 1 and you have

fastened the connector firmly to the

underside of the system board 2.

Removing and replacing a FRU

114 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

For T23 series

Step Screw (quantity) Torque

5 M2.5 ×4.8 mm, nylon-coated (1) 0.392 Nm

(4 kgfcm)

(continued)

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 115

When installing: Make sure that all of the guides are

firmly attached 1 and you have

fastened the connector firmly to the

underside of the system board 2.

Removing and replacing a FRU

116 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

1190 Secure chip

Note

This section is only for the following models;

vMT2647-5Lx, 9Lx, DLT, HLU

vMT2647-5Dx, 5Fx, 5Hx, 5Jx, 5Nx, 5Mx, 9Dx, 9Fx,

9Hx, 9Jx, 9Nx, 9Mx, DFx, HNx, NNx

vMT2647-5Rx, 5Sx, 5Ux, 9Rx, 9Sx, 9Ux, HSU

Other models do not have the secure chip.

For access, remove these FRUs, in order:

v“1010 Battery pack”on page 60

v“1020 Backup battery”on page 61

v“1030 Hard-disk drive”on page 63

v“1040 DIMM”on page 65

v“1050 Mini PCI adapter”on page 66

v“1060 Ethernet daughter card”on page 70

v“1070 Ultrabay 2000 device”on page 73

v“1080 Keyboard”on page 74

v“1090 Keyboard CRU insulator”on page 82

v“1100 Hinge cover”on page 83

v“1110 Keyboard bezel”on page 88

v“1120 Fan assembly”on page 94

v“1140 PC Card slot assembly”on page 100

v“1150 Speaker”on page 103

v“1160 Hard-disk bay”on page 105

v“1170 Ultrabay 2000 slot”on page 107

v“1180 System board”on page 113

When installing: Make sure that the connector is firmly

attached.

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 117

1200 Microphone cable

For access, remove these FRUs, in order:

v“1010 Battery pack”on page 60

v“1020 Backup battery”on page 61

v“1030 Hard-disk drive”on page 63

v“1040 DIMM”on page 65

v“1050 Mini PCI adapter”on page 66

v“1070 Ultrabay 2000 device”on page 73

v“1080 Keyboard”on page 74

v“1090 Keyboard CRU insulator”on page 82

v“1100 Hinge cover”on page 83

v“1110 Keyboard bezel”on page 88

v“1120 Fan assembly”on page 94

v“1140 PC Card slot assembly”on page 100

v“1150 Speaker”on page 103

v“1160 Hard-disk bay”on page 105

v“1170 Ultrabay 2000 slot”on page 107

v“1180 System board”on page 113

Cable routing: When replacing the cable, make sure the

connector is firmly attached into place a.

Cable slacking is only allowed at the

b-part of the frame.

Removing and replacing a FRU

118 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

2010 LCD assembly

For access, remove these FRUs, in order:

v“1010 Battery pack”on page 60

v“1020 Backup battery”on page 61

v“1030 Hard-disk drive”on page 63

v“1050 Mini PCI adapter”on page 66

v“1070 Ultrabay 2000 device”on page 73

v“1080 Keyboard”on page 74

v“1090 Keyboard CRU insulator”on page 82

v“1100 Hinge cover”on page 83

v“1110 Keyboard bezel”on page 88

v“1120 Fan assembly”on page 94

Step Screw (quantity) Torque

1 M2.5 ×4.8 mm, nylon-coated (4) 0.392 Nm

(4 kgfcm)

(continued)

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 119

For models excepting MT2647-xLx, xNx

Step Screw (quantity) Torque

2 M2.5 ×14 mm, nylon-coated (1) 0.392 Nm

(4 kgfcm)

4 M2.5 ×4.8 mm, nylon-coated (2) 0.392 Nm

(4 kgfcm)

Removing and replacing a FRU

120 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

For MT2647-xLx, xNx

Step Screw (quantity) Torque

2 M2.5 ×14 mm, nylon-coated (1) 0.392 Nm

(4 kgfcm)

5 M2.5 ×4.8 mm, nylon-coated (2) 0.392 Nm

(4 kgfcm)

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 121

2020 Front bezel

For access, remove these FRUs, in order:

v“1010 Battery pack”on page 60

v“1020 Backup battery”on page 61

v“1030 Hard-disk drive”on page 63

v“1070 Ultrabay 2000 device”on page 73

v“1080 Keyboard”on page 74

v“1090 Keyboard CRU insulator”on page 82

v“1100 Hinge cover”on page 83

v“1110 Keyboard bezel”on page 88

v“1120 Fan assembly”on page 94

v“2010 LCD assembly”on page 119

Step Screw (quantity) Torque

1 M2.5 ×4.8 mm, nylon-coated (3) 0.392 Nm

(4 kgfcm)

Removing and replacing a FRU

122 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

2030 Inverter card

For access, remove these FRUs, in order:

v“1010 Battery pack”on page 60

v“1020 Backup battery”on page 61

v“1030 Hard-disk drive”on page 63

v“1070 Ultrabay 2000 device”on page 73

v“1080 Keyboard”on page 74

v“1090 Keyboard CRU insulator”on page 82

v“1100 Hinge cover”on page 83

v“1110 Keyboard bezel”on page 88

v“1120 Fan assembly”on page 94

v“2010 LCD assembly”on page 119

v“2020 Front bezel”on page 122

Cable routing: When replacing the inverter card, route

the connector cable as in the following

figure:

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 123

2040 LCD panel

For access, remove these FRUs, in order:

v“1010 Battery pack”on page 60

v“1020 Backup battery”on page 61

v“1030 Hard-disk drive”on page 63

v“1070 Ultrabay 2000 device”on page 73

v“1080 Keyboard”on page 74

v“1090 Keyboard CRU insulator”on page 82

v“1100 Hinge cover”on page 83

v“1110 Keyboard bezel”on page 88

v“1120 Fan assembly”on page 94

v“2010 LCD assembly”on page 119

v“2020 Front bezel”on page 122

v“2030 Inverter card”on page 123

Remove the UltraPort adapter if it has been screwed onto

the LCD. To do this, remove the screw from both side of

the adapter as shown in the figure 1a. Remove the

connector cover for the others as shown in the figure 1b.

1a 1b

(continued)

Removing and replacing a FRU

124 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Step Screw (quantity) Torque

For 13.3-in. XGA LCD LG (05K9636), 14.1-in. XGA LCD Hitachi

(05K9568), 14.1-in. SXGA+ LCD Hitachi (46L2493)

2 M2 ×4 mm, nylon-coated (4) 0.245 Nm

(2.5 kgfcm)

For 14.1-in. XGA LCD LG (05K9567), SAMSUNG (05K9678),

Hyundai (05K9940), DBU (05K9888), 14.1-in. SXGA+ LCD LG

(46L2495)

2a M2 ×4 mm, nylon-coated (4) 0.245 Nm

(2.5 kgfcm)

(continued)

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 125

(continued)

Removing and replacing a FRU

126 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Cable routing: When installing the LCD, route the

connector cable as in the following figure:

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 127

2050 Antenna assembly

Note

This section is only for MT2647-xFx, xJx, xLx, xNx,

xSx. Other models do not have the antenna

assembly.

For access, remove these FRUs, in order:

v“1010 Battery pack”on page 60

v“1020 Backup battery”on page 61

v“1030 Hard-disk drive”on page 63

v“1070 Ultrabay 2000 device”on page 73

v“1080 Keyboard”on page 74

v“1090 Keyboard CRU insulator”on page 82

v“1100 Hinge cover”on page 83

v“1110 Keyboard bezel”on page 88

v“1120 Fan assembly”on page 94

v“2010 LCD assembly”on page 119

v“2020 Front bezel”on page 122

v“2030 Inverter card”on page 123

v“2040 LCD panel”on page 124

(continued)

Removing and replacing a FRU

128 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Strip off the insulation tapes 2 securing the antenna

cables.

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 129

Cable routing: Route the antenna cables as follows;

1. Hook the black antenna cable to projection (1)onthe

right corner of the rear cover.

2. Route the black antenna cable to go through cable

guides 2 and 3.

3. Hook the gray antenna cable to projection (4)onthe

left corner of the rear cover.

4. Route the gray antenna cable to go through cable

guides 5.

5. Make sure that both of the cables are not twisted.

6. Stick insulation tapes 6,7 and 8.

4 1

Removing and replacing a FRU

130 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

2060 Sub card

For access, remove these FRUs, in order:

v“1010 Battery pack”on page 60

v“1020 Backup battery”on page 61

v“1030 Hard-disk drive”on page 63

v“1040 DIMM”on page 65

v“1050 Mini PCI adapter”on page 66

v“1070 Ultrabay 2000 device”on page 73

v“1080 Keyboard”on page 74

v“1090 Keyboard CRU insulator”on page 82

v“1100 Hinge cover”on page 83

v“1110 Keyboard bezel”on page 88

v“1120 Fan assembly”on page 94

v“1140 PC Card slot assembly”on page 100

v“1150 Speaker”on page 103

v“1160 Hard-disk bay”on page 105

v“1170 Ultrabay 2000 slot”on page 107

v“1180 System board”on page 113

v“2010 LCD assembly”on page 119

Step Screw (quantity) Torque

1 Hex stud (6) 0.392 Nm

(4 kgfcm)

2 M2.5 ×4.8 mm, nylon-coated (4) 0.392 Nm

(4 kgfcm)

(continued)

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 131

When installing, do the following:

vAttach the I/O card spacer (a) onto the new sub card

and make sure that the connector is firmly attached.

vMake sure that the eject lever is poped out b and then

install the sub card.

vTake care not to damage the switch on the sub card (A).

vMake sure that the guide of the card is firmly attached

c as shown in the figure.

Removing and replacing a FRU

132 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

3010 ThinkPad Dock PCI cover

Before replacing the PCI cover:

There are two types of ThinkPad Dock, as follows:

vThinkPad Dock: FRU no. 08N1546 (PCI cover: FRU no.

05K6246)

vThinkPad Dock with extension plate: FRU no. 08N1537

(PCI cover: FRU no. 08N7317)

Confirm the FRU no. of the ThinkPad Dock first and

choose the proper PCI cover FRU for the ThinkPad Dock

you are servicing.

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 133

Note: The following illustration shows how to remove the

PCI cover of ThinkPad Dock (FRU no. 08N1546).

Do the same to remove the PCI cover of ThinkPad

Dock with extension plate (FRU no. 08N1537).

(Bottom view)

Removing and replacing a FRU

134 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

3020 ThinkPad Dock top cover

Note

This section is only for the ThinkPad Dock (FRU no.

08N1546). The top cover and screw kit for ThinkPad

Dock (FRU no. 12P4143) is not available for the

ThinkPad Dock with extension plate (FRU no.

08N1537) .

(Rear view)

Step Screw (quantity) Torque

1 M2.5 ×4.8 mm (2) 0.392 Nm

(4 kgfcm)

(continued)

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 135

(Bottom view)

Step Screw (quantity) Torque

2 M2.5 ×4.8 mm (8) 0.392 Nm

(4 kgfcm)

(continued)

Removing and replacing a FRU

136 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Make sure that the system lock key Ais set to the Unlock

position. Release the front latches in step 3, and then

remove the top cover 4. For step 5, see the inside

view, shown in the circle.

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 137

When replacing the top cover, do the following:

vMake sure that the springs are placed correctly.

vMake sure that the device release lever is seated

correctly.

(continued)

Removing and replacing a FRU

138 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

vMake sure that the release button works correctly.

Removing and replacing a FRU

ThinkPad T20, T21, T22 and T23 series 139

Locations

Front view

1 System status indicators

2 Power switch

3 Battery, standby mode, and Ultrabay status

indicators

4 Bay latch

5 Eject button

6 Ultrabay 2000 device

Note: The Ultrabay 2000 accepts storage devices,

such as a DVD drive or a CD-ROM drive.

7 TrackPoint pointing stick

8 TrackPoint buttons

9 ThinkPad button

10 Volume and mute buttons

Locations

140 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Rear view

1 Security keyhole

2 TV-out connector

3 Serial connector

4 Parallel connector

5 External-monitor connector

6 Modem connector

7 Ethernet connector

8 Power jack

9 Universal serial bus (USB) connector

Note: T23 series have two USB connectors.

10 External-input-device connector

11098765432

Locations

ThinkPad T20, T21, T22 and T23 series 141

Bottom view

1 Built-in stereo speakers

2 Battery pack

3 Battery pack latches

4 Docking connector

5 Mini PCI card slot

6 DIMM

7 PC card slots

8 PC card eject button

9 Infrared port

10 Stereo headphone jack

11 Stereo line-in jack

12 Microphone jack

13 Hard-disk drive

14 LCD latches

234

Locations

142 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Parts list

T20, T21, T22 and T23 series model

matrix

The T20, T21, T22 and T23 series includes several

models. The following table summarizes the characteristics

of each model, to help you determine which FRU in the

part list meets your need.

Model CPU Bay

device Mini PCI

adapter LCD HDD

T20 (Memory: 128 MB) (*): Memory 64 MB

(**): Memory 256 MB

2647-21x, 61x CMG

650 CD-

ROM Modem 13.3-in.

XGA 6GB

2647-24x, 64x Combo

(Intel)

2647-A1x —— —

2647-31x DVD-

ROM

(6x)

Modem 14.1-in.

XGA 6GB

2647-2EY CD-

ROM Combo

(3Com) 13.3-in.

XGA 12 GB

2647-32x, 72x

(*) CMG

700 Modem

2647-T1x (**) 14.1-in.

XGA

2647-41x, 81x,

43x DVD-

ROM

(6x)

Modem

2648-41x, 81x

2647-42x, 82x —

2648-42x, 82x

2647-44x, 84x Combo

(Intel)

2648-44x, 84x

2647-46x, 86x Combo

(3Com)

2648-46x, 86x

2647-45x FDD Ethernet

2647-B1x —— —

2647-L1x, L2x CMG

750 CD-

ROM Modem 14.1-in.

XGA 20 GB

2647-52x, 92x DVD-

ROM

(6x)

2647-55x, 95x Combo

(Intel)

2647-C1x —— —

(continued)

Parts list

ThinkPad T20, T21, T22 and T23 series 143

Model CPU Bay

device Mini PCI

adapter LCD HDD

T21 (Memory: 128 MB)

2647-27x, 67x CMG

750 CD-

ROM Modem 13.3-in.

XGA 10 GB

2647-2Ax, 6Ax Combo

(Xircom)

2647-4Bx, 8Bx Combo

(3Com)

2647-47x, 49x,

87x, L7x CMG

800 DVD-

ROM

(8x)

Modem 14.1-in.

XGA 20 GB

2648-47x, 87x

2647-4Ax, 8Ax Combo

(Xircom)

2648-4Ax, 8Ax Combo

(Intel)

2647-4Bx, 8Bx Combo

(3Com)

2648-4Bx, 8Bx

2647-57x, 97x CMG

850 Modem 14.1-in.

SXGA+ 32 GB

2647-5Ax, 9Ax Combo

(Xircom)

2647-5Bx, 9Bx Combo

(3Com)

T22 (Memory: 128 MB)

2647-3Cx, 7Cx CMG

800 CD-

ROM Modem 13.3-in.

XGA 10 GB

2647-3Ex, 7Ex,

B2x, B3x, B4x,

B5x

Combo

(Intel)

2647-4Cx,4Gx,

8Gx, 8Cx,M2x,

M3x, LCx

CMG

900 DVD-

ROM

(8x)

Modem 14.1-in.

XGA 20 GB

2648-4Cx, 8Cx

2647-4Ex, 8Ex,

M4x, M5x Combo

(Intel)

2648-4Ex, 8Ex

2647-4Gx, 8Gx Combo

(3Com)

2648-4Gx, 8Gx

2647-T2x FDD Combo

(Intel)

2647-5Cx, 9Cx CMG

1G DVD-

ROM

(8x)

Modem 14.1-in.

SXGA+ 32 GB

2647-5Ex, 9Ex,

M6x Combo

(Intel)

(continued)

Parts list

144 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Model CPU Bay

device Mini PCI

adapter LCD HDD

T23 (Memory: 128 MB) (**): Memory 256 MB

2647-2Kx except

2KC

2647-6Kx except

xxC

2647-AKx, BAx,

BJx, EKx

Tual

866 CD-

ROM Modem 13.3-in.

XGA 15 GB

2647-2KC, 6KC DVD-

ROM

(8x)

2647-2Rx, 6Rx Tual

1.0 CD-

ROM 14.1-in.

XGA 20 GB

2647-2Tx, 2UC,

6UC, 3RG, 7RG DVD-

ROM

(8x)

2648-2Tx

2647-3TK, 7TK CD-

ROM 30 GB

2647-T4x (**) Tual

1.13 14.1-in.

XGA

2647-4Mx, 8Mx,

MMx DVD-

ROM

(8x)

2648-4Mx, 8Mx

2647-4Qx, 8Qx

2647-4Nx, 8Nx,

GNU, KNG, MNx 802.11/

v.90 14.1-in.

XGA

with

antenna

2648-4Nx, 8Nx

2647-4Rx, 8Rx Tual

1.2 Modem 14.1-in.

XGA 40 GB

2648-4Rx, 8Rx

2647-4Sx, 8Sx,

BSx 802.11/

v.90 14.1-in.

XGA

with

antenna

2648-4Sx, 8Sx

2647-5Kx, 9Kx Tual

1.13 Modem 14.1-in.

SXGA+ 48 GB

2647-5Lx, 9Lx,

DLT, HLU

802.11/

v.90 14.1-in.

SXGA+

with

antenna

(continued)

Parts list

ThinkPad T20, T21, T22 and T23 series 145

Model CPU Bay

device Mini PCI

adapter LCD HDD

T23 (Memory: 128 MB) (**): Memory 256 MB

2647-5Mx, 9Mx Tual

1.2 CD-

RW Modem 14.1-in.

SXGA+ 48 GB

2647-5Nx, 9Nx,

HNx, NNx

802.11/

v.90 14.1-in.

SXGA+

with

antenna

2647-5Fx, 9Fx,

DFx

DVD-

ROM

(8x)

2647-5Dx, 9Dx

Modem 14.1-in.

SXGA+

2647-5Hx, 9Hx

DVD/

CD-

combo

2647-5Jx, 9Jx

802.11/

v.90 14.1-in.

SXGA+

with

antenna

2647-5Ux, 9Ux

Tual

1.2 DVD-

ROM

(8x)

Modem 14.1-in.

SXGA+ 60 GB

2647-5Rx, 9Rx

(**) DVD/

CD-

combo

2647-5Sx, 9Sx,

HSx

(**) 802.11/

v.90 14.1-in.

SXGA+

with

antenna

vCMG xxx: Mobile Intel

Pentium

III processor xxx GHz (MHz)

vTual xxx: Mobile Intel

Pentium

III processor xxx GHz

(MHz)-M

v*1: no EDC feature, *2: featuring Secure chip

Parts list

146 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Overall

For T20, T21 and T22

9 810

Parts list

ThinkPad T20, T21, T22 and T23 series 147

vEach FRU is available for all types or models, unless

specific types or models are given.

vThe FRUs marked with asterisk are CRUs (customer

replaceable units.)

vThe FRUs marked with OP are also available as

optional FRUs.

No. FRU P/N

a-l See “Miscellaneous parts”on page 167.

1 LCD unit (see “LCD FRUs”on page 157)

2 Keyboard bezel for T20

for all models except xxK 46P2615

for models xxK 46P2616

Keyboard bezel for T21 and T22

for all models except xxK 46P2613

for models xxK 46P2614

3 Fan assembly for T20 08K7066

Fan assembly for T21 04P3448

Fan assembly for T22

for 2647-3xx, 7xx, BxG 08K7268

for 2648-all

for 2647-all except models 3xx, 7xx, BxG

26P9317

4 PC Card slots 08K7064

5 I/O card 26P8023

I/O card with conformal coating 08K3373

6 Microphone cable assembly 27L0520

7 Base cover for T20

for 2647-all except models xxK, xxT 08K6079

for 2647-xxK 08K6350

for 2647-xxT 08K6346

for 2648-all except models xxK, xxT 08K6369

for 2648-xxK 08K6372

for 2648-xxT 08K6370

Base cover for T21

for 2647-all except models xxK 26P9291

for 2647-xxK 04P3446

for 2648-all except models xxK 04P3445

for 2648-xxK 04P3447

(continued)

Parts list

148 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

No. FRU P/N

7 Base cover for T22

for 2647-3xx, 7xx, Bxx except models xxK 26P9291

for 2647-3xK, 7xK, BxK 26P9309

for 2647-4xx, 5xx, 8xx, 9xx, Mxx, Lxx

except models xxK

08K7362

for 2647-4xK, 5xK, 8xK, 9xK, MxK, LxK 26P9174

for 2648-all except models xxK 26P9173

for 2648-xxK 26P9175

8 Ultrabay 2000 diskette drive (TEAC) 08K9606*

Ultrabay 2000 diskette drive (SONY) 08K9607*

Ultrabay 2000 CD-ROM drive (TOSHIBA)

OP 27L3973*

Ultrabay 2000 CD-ROM drive (TEAC), low

power OP 27L3436*

Ultrabay 2000 CD-ROM drive (LG) OP 27L4141*

Ultrabay 2000 CD-ROM drive (LG), low

power OP 27L4301*

Ultrabay 2000 DVD drive 6x (MKE) OP 05K9188*

Ultrabay 2000 DVD drive 6x (TOSHIBA) OP 05K9160*

Ultrabay 2000 DVD drive 8x (MKE) OP 27L4241*

Ultrabay 2000 DVD drive 8x (HITACHI) OP 27L4236*

for other optional Ultrabay 2000 devices, see “Optional

FRUs”on page 170.

9 Cover, DIMM slot 08K6090*

10 Battery pack, Panasonic OP

for all models except xxE, xxJ 02K6626*

for models xxE, xxJ 02K6857*

Battery pack, SANYO OP

for all models except xxE, xxJ 02K6627*

for models xxE, xxJ 02K6859*

11 Backup battery 02K6572

12 Cover, Mini PCI adapter slot 08K6091*

13 Speaker assembly 08K6089

14 64-MB SDRAM SO DIMM (PC100) OP 20L0264*

128-MB SDRAM SO DIMM (PC100) OP 20L0265*

for other optional DIMM, see “Optional FRUs”on

page 170.

(continued)

Parts list

ThinkPad T20, T21, T22 and T23 series 149

No. FRU P/N

15 Mini PCI modem card OP

for T20 (models x1x except T1U, x2x, x3x,

BxG)

08K3429*

Mini PCI modem card (Ambit)

for T20, T21 (models x1x, x2x, x3x, xxG) 08K4855*

Mini PCI modem card (Hoshi CR)

for T21 (models x7x except x7G) 08K3338*

Mini PCI modem card (Ambit), V.92 ready

for T22 (models xCx) 08K4853*

Mini PCI combo card (Intel) OP

for T20 (models x4x, x5x), T21 (models

xAJ, xAK)

08K3125*

Mini PCI combo card (3Com) OP

for T20 (models x6x), T21 (models xBx) 00N8117*

Mini PCI combo card (Intel) OP

for T21 (models xBx) 06P3829*

Mini PCI combo card (Intel CR) OP

for T21 (models xAx except xAJ, xAK) 19K5888*

Mini PCI combo card (Intel), V.92 ready OP

for T22 (models xEx, BxG, 6xx, PM5, T2x) 06P3809*

Mini PCI combo card (3Com) OP

for T22 (2647-4Gx, 8Gx, MxU) 22P6753*

Mini PCI Ethernet card OP

for T20 (2647-45G, 45U) 10L1423*

for other optional Mini PCI adapter, see “Optional FRUs”

on page 170.

16 System board

for T20 (all models except 2647-5xx, 9xx,

Lxx)

12P3360

for T20 (2647-5xx, 9xx, Lxx) 12P3363

for T21 (all models except 2647-5xx, 9xx

Cxx)

12P3366

for T21 (2647-5xx, 9xx Cxx) 12P3369

for T22 (2647-3xx, 7xx Bxx) 26P8096

for T22 (all models except 2647-3xx, 7xx

Bxx)

26P8098

17 CPU, Pentium III 650 MHz 10L1405

CPU, Pentium III 700 MHz 10L1417

CPU, Pentium III 750 MHz 08K3191

CPU, Pentium III 800 MHz 08K3246

CPU, Pentium III 850 MHz 08K3248

CPU, Pentium III 900 MHz 08K3346

CPU, Pentium III 1 GHz 08K3392

(continued)

Parts list

150 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

No. FRU P/N

18 Asset ID RF adapter (see “Optional FRUs”on page 170)

19 Hard-disk drive (6.0 GB), STD OP 05K9227*

Hard-disk drive (6.0 GB), HITACHI OP 05K9228*

Hard-disk drive (10.0 GB), STD OP 08K9508*

Hard-disk drive (10.0 GB), HITACHI OP 08K9531*

Hard-disk drive (12.0 GB), STD OP 05K9229*

Hard-disk drive (12.0 GB), HITACHI OP 05K9230*

Hard-disk drive (20.0 GB), STD OP 27L4286*

Hard-disk drive (20.0 GB), HITACHI OP 08K9533*

Hard-disk drive (30.0 GB), STD OP 08K9564*

Hard-disk drive (32.0 GB), STD OP 08K9509*

for other optional hard-disk drive, see “Optional FRUs”on

page 170.

20 Cover, hard-disk drive for T20 08K6092*

Cover, hard-disk drive for T21, T22 04P3496*

21 Keyboard* (see “Keyboard”on page 160)

22 Pointing stick cap 84G6536*

23 Easy button cover for T22 26P9183

24 Bracket, LCD FPC 26P9178

—Shield, Mini PCI

—Blank cap for RJ45 (for T20) 04P3975

—Telephone cable (San Tai) 27L0603

—Recovery CD (see “Recovery CDs”on page 161.)

—AC adapter* (see “AC adapters”on page 156.)

Parts list

ThinkPad T20, T21, T22 and T23 series 151

For T23

9 810

Parts list

152 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

vEach FRU is available for all types or models, unless

specific types or models are given.

vThe FRUs marked with one asterisk are CRUs

(customer replaceable units.)

vThe FRUs marked with OP are also available as

optional FRUs.

No. FRU P/N

a-k See “Miscellaneous parts”on page 167.

1 LCD unit (see “LCD FRUs”on page 157)

2 Keyboard bezel for T23 (all models except

xxK) 46P2611

for models xxK 46P2612

3 Fan assembly for T23 26P9166

4 PC Card slots for T23 26P9165

5 I/O card assembly for T23 26P8006

6 Microphone cable assembly 27L0520

7 Base cover for 2647 (T23)

for models except xJx, xFx, xLx, xNx, xSx,

xxC, xxK, xxT

26P9158

for models xDC, xKC, xMC, xPC, xUC,

2TC, xRC

26P9162

for models xHK, xKK, xMK, xPK, xRK,

2TK, 3TK, 7TK

26P9160

for models xHT, xKT, xMT, xPT, xRT, 2TT 46L4922

Base cover for 2647 wireless (T23)

for models xJx except xJK, xJT

for models xFx except xFC

for models xLx except xLK, xLT

for models xNx except xNC, xNK, xNT

for models xSx except xSC, xSK, xST

46L4972

for models xNC, xFC, xSC, x5TC, 9TC 46L4934

for models xJK, xLK, xNK, xSK 26P9611

for models xJT, xLT, xNT, xST 46L4923

Base cover for 2648 (T23)

for models except 4Nx, 8Nx, xxC, xxK,

xSx, xxT

26P9159

for models 4MC, 4PC, 8MC, 8PC, 2TC,

xRC

26P9163

for models 4MK, 4PK, 8MK, 8PK, 2TK,

xRK

26P9161

for models 4MT, 4PT, 8MT, 8PT, 2TT, xRT 46L4924

(continued)

Parts list

ThinkPad T20, T21, T22 and T23 series 153

No. FRU P/N

7 Base cover for 2648 wireless (T23)

for models xNx, xSx, except xNC, xNK,

xNT, xSC, xSK, xST

46L4921

for models 4NC, 8NC, xSC 46L4935

for models 4NK, 8NK, xSK 46L4933

for models 4NT, 8NT, xST 46L4925

8 Ultrabay 2000 CD-ROM drive (LG), low

power OP 27L4301*

Ultrabay 2000 CD-ROM drive (TEAC), low

power OP 27L3436*

Ultrabay 2000 DVD-ROM drive 8x (MKE)

OP 27L4241*

Ultrabay 2000 DVD-ROM drive 8x (MKE),

light weight OP 08K9648*

Ultrabay 2000 DVD-ROM drive 8x (HITACHI)

OP 27L4236*

Ultrabay 2000 DVD-ROM drive 8x (HLDS),

light weight OP 08K9646*

Ultrabay 2000 DVD-ROM drive 8x (TOSHIBA)

OP 27L4213*

Ultrabay 2000 CD-RW drive (SONY) OP 27L4231*

Ultrabay 2000 CD-RW drive (TEAC) OP 27L4297*

Ultrabay 2000 DVD/CD-RW combo drive

(TOSHIBA) OP 27L4249*

Ultrabay 2000 DVD/CD-RW combo drive

(KME) OP 27L4359*

for other optional Ultrabay 2000 devices, see “Optional

FRUs”on page 170.

9 Cover, DIMM slot for T23 26P9421*

10 Battery pack, PANASONIC OP

for models xKx, xQx, L4x except xxE, xxJ 02K6626*

for models xKE, xKJ 02K6857*

Battery pack, SANYO OP

for models xKx, xQx, L4x except xxE, xxJ 02K6627*

for models xKE, xKJ 02K6859*

Battery pack, PANASONIC 2.0 Ah OP

for all models except xKx, xQx, L4x 02K7026*

for models xxE, xxJ except xKE, xKJ 02K7030*

Battery pack, SANYO 2.0 Ah OP

for all models except xKx, xQx, L4x 02K7028*

for models xxE, xxJ except xKE, xKJ 02K7032*

11 Backup battery 02K6572

(continued)

Parts list

154 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

No. FRU P/N

12 Cover, Mini PCI adapter slot 08K7416*

13 Speaker assembly 08K6089

14 128-MB SDRAM SO DIMM (PC133) OP 19K4653*

256-MB SDRAM SO DIMM (PC133) OP 19K4655*

for other optional DIMMs, see “Optional FRUs”on

page 170.

15 Mini PCI modem card (Ambit) OP

for all models except 2647-xFx, xJx, xLx,

xNx, xSx, 5TC, 9TC, and 2648-xNx, xSx

08K4853*

Mini PCI 802.11b/v.92 modem card

(ACTIONTEC)

2647-xFx, xJx, xLx, xNx, xSx, 5TC, 9TC,

and 2648-xNx, xSx

12P3657

16 System board for models except 2647-4Rx,

8Rx, BSx, 4Sx, 8Sx, DRx, DSx, and

2648-4Rx, 8Rx, 4Sx, 8Sx

Note: Use a new system board with the

same FRU no. as the original FRU.

26P8218

12P3770

System board

2647-4Rx, 8Rx, BSx, 4Sx, 8Sx, DRx, DSx

2648-4Rx, 8Rx, 4Sx, 8Sx

12P3770

17 CPU assembly, mobile Intel

Pentium

III

processor 866 MHz-M 26P7999

CPU assembly, mobile Intel

Pentium

III

processor 1.0 GHz-M 26P8122

CPU assembly, mobile Intel

Pentium

III

processor 1.13 GHz-M 26P8082

CPU assembly, mobile Intel

Pentium

III

processor 1.2 GHz-M 26P8005

18 Asset ID RF adapter (see “Optional FRUs”on page 170)

19 Hard-disk drive (15.0 GB), HITACHI OP 08K9587*

Hard-disk drive (15.0 GB), STD OP 08K9585*

Hard-disk drive (20.0 GB), HITACHI OP 08K9533*

Hard-disk drive (20.0 GB), STD OP 27L4286*

Hard-disk drive (30.0 GB), HITACHI OP 08K9592*

Hard-disk drive (30.0 GB), STD OP 27L4291*

Hard-disk drive (40.0 GB), STD OP 08K9683*

Hard-disk drive (40.0 GB), HITACHI OP 08K9767*

Hard-disk drive (48.0 GB), STD OP 08K9599*

Hard-disk drive (60.0 GB), STD OP 08K9700*

20 Cover, hard-disk drive for T23 26P9543*

21 Keyboard* (see “Keyboard”on page 160.)

22 Pointing stick cap 84G6536*

23 Easy button cover 26P9536

(continued)

Parts list

ThinkPad T20, T21, T22 and T23 series 155

No. FRU P/N

24 Ethernet daughter card (Ambit) OP

for all models except 2647-xQx 26P8181

25 Secure chip OP

for 2647-5xx except 5Kx, 9xx except 9Kx

for 2647-HNx, xLx

26P8084

—Telephone cable (SAN TAI) 27L0603

—Recovery CD (see “Recovery CDs”on page 161.)

—AC adapter* (see “AC adapters”.)

AC adapters

FRU P/N

AC adapter (72 W), 2-pin (ASTEC) OP

for models xxE, xxF, xxJ, xxP, xxS, xxU, xxX 02K6753*

AC adapter (72 W), 2-pin (DELTA) OP

for models xxE, xxF, xxJ, xxP, xxS, xxU, xxX 02K6756*

AC adapter (72 W), 2-pin (SANKEN)

for models xxE, xxF, xxJ, xxP, xxS, xxU, xxX 02K6757*

AC adapter (72 W), 3-pin (ASTEC) OP

for models xxA, xxB, xxC, xxG, xxH, xxK, xxM,

xxT, xxY

02K6751*

AC adapter (72 W), 3-pin (DELTA) OP

for models xxA, xxB, xxC, xxG, xxH, xxK, xxM,

xxT, xxY

02K6754*

Parts list

156 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

LCD FRUs

Notes:

1. The parts marked with are only for 13.3-in. LCD

cover kit.

2. 5is for the models with 14.1-in. XGA TFT with antenna

and for the models with 14.1-in. SXGA+ TFT with

antenna.

3. 6is only for 2647-52x, 92x, C2x, L1x.

13.3-in. XGA TFT

No. FRU P/N

1 LCD cover kit (13.3-in.) XGA (except models

xxK) 08K6685

models xxK 08K6764

2 LCD cable assembly 13.3 27L0562

3 LCD panel, 13.3 XGA (LG) 05K9636

4 Hinges 08K6087

5 not available for this model —

6 not available for this model —

7 Inverter card 10L1402

Parts list

ThinkPad T20, T21, T22 and T23 series 157

14.1-in. XGA TFT

No. FRU P/N

1 LCD cover kit (14.1-in.) XGA

for T20, T21 (except models xxK) 26P9566

for T20, T21 (models xxK) 26P9567

for T22, T23 (except models xxK) 46L4843

for T22, T23 (models xxK) 46L4844

LCD cover antenna kit (except models xxK) 46L4910

models xxK 46L4911

2 LCD cable assembly 14.1 XGA for T20, T21 27L0519

LCD cable assembly 14.1 XGA (CR) for T22,

T23 27L0640

3 LCD panel, 14.1 XGA (LG) 05K9567

LCD panel, 14.1 XGA (HITACHI) for T20, T21 05K9568

LCD panel, 14.1 XGA (SAMSUNG) for T20,

T21 05K9944

LCD panel, 14.1 XGA (HYUNDAI) for T20,

T21 05K9940

LCD panel, 14.1 XGA (LG) X10 Light Weight 11P8241

LCD panel, 14.1 XGA (HITACHI) Light Weight

for T22, T23 11P8258

LCD panel, 14.1 XGA (SAMSUNG) Light

Weight for T22, T23 46L2292

LCD panel, 14.1 XGA (DBU) Light Weight for

T22, T23 05K9888

4 Hinges 08K6087

Hinges for antenna 26P9196

5 Antenna assembly 26P9197

6 Thermal hinge (only for 2647-52x, 92x, C2x,

L1x) 08K6353

7 Inverter card 10L1402

Parts list

158 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

14.1-in. SXGA+ TFT

No. FRU P/N

1 LCD cover kit (14.1-in.) SXGA+ (except

models xxK) 26P9383

models xxK 26P9385

LCD cover antenna kit (except models xxK) 46L4910

models xxK 46L4911

2 LCD cable assembly 14.1 SXGA+ 27L0590

3 LCD panel, 14.1 SXGA+ (HITACHI) 46L2493

LCD panel, 14.1 SXGA+ (LG) 46L2495

4 Hinges 08K6087

Hinges for antenna 26P9196

5 Antenna assembly 26P9197

6 not available for this model —

7 Inverter card 10L1402

Parts list

ThinkPad T20, T21, T22 and T23 series 159

Keyboard

Language P/N (NMB) P/N

(ALPS)

Arabic 02K5750* —

Belgian 02K5745* —

Chinese, traditional 02K5747* 02K5718*

Czech 02K5751* —

Danish 02K5738* —

Dutch 02K5735* —

English, U.K. 02K5731* —

English, U.S. 02K5729* —

French, Canadian 02K5732* —

French, European 02K5734* —

German 02K5733* —

Greek 02K5753* —

Hungarian 02K5752* —

Hebrew 02K5749* —

Italian 02K5739* —

Japanese 02K5730* 02K5701*

Korean 02K5744* 02K5715*

Norwegian 02K5737* —

Polish 02K5755* —

Portuguese 02K5742* —

Russian 02K5748* —

Slovak 02K5754* —

Slovenian 02K5756* —

Spanish, European 02K5740* —

Spanish, Latin American 02K5743* —

Swedish or Finnish 02K5736* —

Swiss 02K5741* —

Thai 02K5757* 02K5728*

Turkish 02K5746* —

Parts list

160 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Recovery CDs

For Windows 98 (T22 series)

Language P/N

Arabic 14P9515*

Chinese, Simplified 27P2112*

Chinese, Traditional 27P2110*

Czech 14P9516*

Danish 23P9240*

Dutch 23P9247*

English, U.K. 23P9236*

English, U.S. 23P9235*

Finnish 23P9246*

French, Canadian 23P9237*

French, European 23P9241*

German 23P9242*

Greek 23P9266*

Hebrew 14P9517*

Hungarian 23P9267*

Italian 23P9245*

Japanese 46P4398*

Norwegian 23P9248*

Polish 23P9264*

Portuguese 23P9239*

Russian 23P9268*

Slovak 23P9270*

Slovenian 23P9269*

Spanish, European 23P9243*

Spanish, Latin American 23P9238*

Swedish 23P9244*

Thai 14P9519*

Turkish 14P9518*

Parts list

ThinkPad T20, T21, T22 and T23 series 161

For Windows 2000 (T22 series)

Language P/N

Arabic 14P9525*

Czech 14P9526*

Greek 23P9218*

Hebrew 14P9527*

Hungarian 23P9219*

Polish 14P9528*

Russian 23P9220*

Slovak 23P9222*

Slovenian 23P9221*

Turkish 14P9529*

For Windows 2000/Windows NT (T22 series)

Language P/N

Chinese, Simplified 27P2117*

Chinese, Traditional 27P2114*

Danish 23P9180*

Dutch 23P9187*

English, U.K. 23P9176*

English, U.S. 23P9175*

French, Canadian 23P9177*

French, European 23P9181*

Finnish 23P9186*

German 23P9182*

Italian 23P9185*

Japanese 27P1659*

Norwegian 23P9188*

Portuguese 23P9179*

Spanish, European 23P9183*

Spanish, Latin American 23P9178*

Swedish 23P9184*

Parts list

162 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

For Windows 98 (T23 series)

Language P/N

Arabic 14P9202*

Arabic (modem enabled) 14P9201*

Chinese, Simplified 46P4518*

Chinese, Traditional 46P4514*

Chinese, Traditional (Hong Kong S.A.R.) 46P6327*

Czech 14P9203*

Danish 14P9192*

Dutch 14P9199*

English, U.K. 14P9188*

English, U.S. 32P5573*

Finnish 14P9198*

French, Canadian 14P9189*

French, European 14P9193*

German 14P9194*

Greek 32P5653*

Hebrew 14P9204*

Hungarian 14P9208*

Italian 14P9197*

Japanese 46P4419*

Norwegian 14P9200*

Polish 14P9205*

Portuguese 14P9191*

Russian 14P9209*

Slovak 14P9211*

Slovenian 14P9210*

Spanish, European 14P9195*

Spanish, Latin American 14P9190*

Swedish 14P9196*

Thai 14P9212*

Turkish 14P9206*

Parts list

ThinkPad T20, T21, T22 and T23 series 163

For Windows 2000 (T23 series)

Language P/N

Arabic 32P6633*

Chinese, Simplified 46P4520*

Chinese, Traditional 46P4516*

Chinese, Traditional (Hong Kong S.A.R.) 46P6329*

Czech 32P6634*

Danish 32P6624*

Dutch 32P6631*

English, U.K. 32P6620*

English, U.S. 32P6619*

Finnish 32P6630*

French, Canadian 32P6621*

French, European 32P6625*

German 32P6626*

Greek 32P6638*

Hebrew 32P6635*

Hungarian 32P6639*

Italian 32P6629*

Norwegian 32P6632*

Polish 32P6636*

Portuguese 32P6623*

Russian 32P6640*

Spanish, European 32P6627*

Spanish, Latin American 32P6622*

Swedish 32P6628*

Turkish 32P6637*

Parts list

164 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

For Windows 2000/Windows NT (T23 series)

Language P/N

Danish 14P9291*

Dutch 14P9298*

English, U.K. 32P5645*

English, U.S. 32P5576*

French, Canadian 14P9288*

French, European 14P9292*

Finnish 14P9297*

German 14P9293*

Italian 14P9296*

Japanese 46P4421*

Norwegian 32P5742*

Portuguese 14P9290*

Spanish, European 14P9294*

Spanish, Latin American 14P9289*

Swedish 14P9295*

Parts list

ThinkPad T20, T21, T22 and T23 series 165

For Windows XP (T23 series)

Language P/N

Arabic 32P6736*

Chinese, Simplified 46L6288*

Chinese, Traditional 46L6287*

Chinese, Traditional (Hong Kong S.A.R.) 46P6362*

Czech 32P6737*

Danish 32P6727*

Dutch 32P6734*

English, U.K. 32P6723*

English, U.S. 32P6722*

Finnish 32P6733*

French, Canadian 32P6724*

French, European 32P6728*

German 32P6729*

Greek 32P6741*

Hebrew 32P6738*

Hungarian 32P6742*

Italian 32P3732*

Japanese 46P4457*

Norwegian 32P6735*

Polish 32P6739*

Portuguese 32P6726*

Russian 32P6743*

Spanish, European 32P6730*

Spanish, Latin American 32P6725*

Swedish 32P6731*

Turkish 32P6740*

Parts list

166 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Miscellaneous parts

Italicized letters in parentheses are reference to the

exploded view on page 147 and 152.

FRU P/N

Screw kit (including nylon-coated screws) for T20,

T21, T22 and T23 series:

vM2.5 x 14 mm, bind head (15)

vM2.5 x 11.5 mm, flat head (5)

vM2.5 x 4.8 mm, flat head (20)

vM2.5 x 3.5 mm, flat head (10)

vM2.0 x 13.5 mm, pan head (15)

vM2..0 x 4.0 mm, small head (10)

vHex stud D-sub (10)

vCoin screw (1)

vSecurity screw (1)

vBlank cap, enhanced port (5)

vScrew caps, rear (5)

vScrew caps (5)

vScrew caps (painted) (10)

vScrew caps (not painted, thin) (10)

vScrew caps (not painted) (5)

26P9654

Base miscellaneous parts for T20, T21, T22 and T23

series:

vCover, RF ID

vSpring, battery lock

vLid, docking FR

vLid, docking RR

vSpring, lid docking

vSpring, lid PC card

vLid, PC card

vESD plate, audio

vInsulator for base cover

vEject lever

vSpring lever

vPuller bay

vLabel danger, backup battery

vRubber foot, low height (2)

vRubber foot, high (1)

vSponge

vKnob, battery lock

vLatch, battery lock

vScrew caps

vScrew caps, rear

26P9285

(continued)

Parts list

ThinkPad T20, T21, T22 and T23 series 167

FRU P/N

System miscellaneous parts for T20 series:

v(a) Hinge cover assembly

v(23) Easy button cover

v(i) I/O card spacer

v(h) Cable RJ11 to system board docking

v(j) Holder, backup battery

v(g) Ultrabay 2000 guide rail

v(l) Hard-disk bay guide rail

v(b) Insulator, keyboard CRU

vMini PCI guide

vScrew caps

vScrew caps, rear

Note: 12P4226 does not contain c,d,e,fand k.

12P4226

System miscellaneous parts for T21 series:

v(a) Hinge cover assembly

v(23) Easy button cover

v(i) I/O card spacer

v(h) Cable RJ11 to system board docking

v(j) Holder, backup battery

v(g) Ultrabay 2000 guide rail

v(l) Hard-disk bay guide rail

v(b) Insulator, keyboard CRU

v(c) ESD fan cover

v(d) ESD plate spring CSB

v(e) ESD bracket, FPC

v(f) Keyboard support

v(24) Bracket, LCD FRC

vMini PCI guide

vGrease

vScrew caps

vScrew caps, rear

Note: 12P4227 does not contain k.

12P4227

System miscellaneous parts for T22 series:

v(a) Hinge cover assembly

v(23) Easy button cover

v(i) I/O card spacer

v(h) Cable RJ11 to system board docking

v(j) Holder, backup battery

v(g) Ultrabay 2000 guide rail

v(l) Hard-disk bay guide rail

v(b) Insulator, keyboard CRU

v(c)ESD fan cover

v(d) ESD plate spring CSB

v(e) ESD bracket, FPC

v(f) Keyboard support

v(24) ESD bracket, LCD FPC

v(k) Speaker RF bracket

vMini PCI guide

vGrease

vScrew caps

vScrew caps, rear

12P4228

(continued)

Parts list

168 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

FRU P/N

System miscellaneous parts for T23 series:

v(a) Hinge cover assembly

v(23) Easy button cover T23

v(g) I/O card spacer

v(f) Cable RJ11 to system board docking

v(h) Holder, backup battery

v(e) Ultrabay 2000 guide rail

v(j) Hard-disk bay guide rail

v(b) Insulator, keyboard CRU

v(k) ESD bracket, FPC

v(d) ESD bracket, LCD FPC

v(c) EMI finger PCMCIA

v(i) Bracket EMI speaker

vMini PCI guide

vThermal grease

vScrew caps

vScrew caps, rear

12P4229

I/O card miscellaneous parts for for T20, T21 and

T22 series:

vDC jack connector

vCable RJ11/45 to mini PCI

vInsulator, modular jack

vInsulation tape

vScrew caps

vScrew caps, rear

08K6683

I/O card miscellaneous part for T23 series:

vDC jack connector

vCable RJ11/45 to Mini PCI/EDC

vInsulator, modular jack

vInsulator for system board

vInsulation tape

vScrew caps

vScrew caps, rear

26P9789

System board miscellaneous parts for T20, T21 and

T22 series:

vSystem board stud

vInsulator, PC card

vInsulator, battery latch

vKeyboard connector guide

vShock rubber

vInsulator, docking connector

vInsulator, fan connector

vInsulator, Ultrabay 2000 connector

vInsulator, I/O connector

vShield, Mini PCI

vInsulator, hard-disk drive

vThermal grease

vScrew caps

vScrew caps, rear

08K7099

(continued)

Parts list

ThinkPad T20, T21, T22 and T23 series 169

FRU P/N

System board miscellaneous parts for T23 series:

vSystem board stud

vSystem board stud (long)

vSystem board stud (back)

vInsulator, PC card

vInsulator, battery latch

vKeyboard connector guide

vShock rubber

vInsulator, docking connector

vInsulator, Ultrabay 2000 bay connector

vInsulator, I/O connector

vInsulator, hard-disk drive

vShield, Mini PCI

vInsulator, guide rail

vThermal grease

vScrew caps

vScrew caps, rear

26P9164

Optional FRUs

FRU P/N

256-MB SDRAM SO DIMM (PC100) 33L3070*

64-MB SDRAM SO DIMM (PC133) 19K4651*

512-MB SDRAM SO DIMM (PC133) 19K4657*

Ultrabay 2000 diskette drive (TEAC) 08K9606*

Ultrabay 2000 diskette drive (SONY) 08K9607*

Ultrabay 2000 CD-ROM drive (24x) (LG) 27L4141*

Ultrabay 2000 CD-ROM drive (24x) (TOSHIBA) 27L3973*

Ultrabay 2000 DVD-ROM drive (6x) (MKE) 05K9188*

Ultrabay 2000 DVD-ROM drive (6x) (TOSHIBA) 05K9160*

Ultrabay 2000 DVD-ROM drive (8x) (MKE) 27L4241*

Ultrabay 2000 DVD-ROM drive (8x) (HITACHI) 27L4236*

Ultrabay Plus device carrier 26P9388*

Ultrabay Plus numeric keypad 19K2056*

Ultrabay Plus cradle for WorkPad c500 series 26P9389*

(continued)

Parts list

170 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

FRU P/N

Ultrabay 2000 SuperDisk drive (LS120) 05K9235*

Ultrabay 2000 SuperDisk drive (LS120 2x) 27L3450*

Ultrabay 2000 SuperDisk drive (LS240) 08K9615*

Ultrabay 2000 ZIP-250 drive 00N8254*

Ultrabay 2000 battery 02K6645*

Ultrabay 2000 2nd HDD adapter 08K6067*

Hard-disk drive (6.0 GB), STD 05K9227*

Hard-disk drive (6.0 GB), HITACHI 05K9228*

Hard-disk drive (10.0 GB), STD 08K9508*

Hard-disk drive (12.0 GB), STD 05K9229*

Hard-disk drive (12.0 GB), HITACHI 05K9230*

Hard-disk drive (18.0 GB), STD 27L4073*

Hard-disk drive (20.0 GB), STD 27L4286*

Hard-disk drive (32.0 GB), STD 08K9509*

Hard-disk drive (40.0 GB), STD 08K9683*

Hard-disk drive (48.0 GB), STD 08K9599*

Hard-disk drive (60.0 GB), STD 08K9700*

Mini PCI combo card (Intel) 08K9509*

Battery pack (Li-Ion) 9 cell, Panasonic 02K6615*

Battery pack (Li-Ion) 9 cell, SANYO 02K6619*

Multiple battery charger 02K6642*

Multiple battery charger (Ni-HM) 02K6718*

AC adapter (72 W), 3-pin (ASTEC) 02K6666*

AC adapter (72 W), 2-pin (ASTEC) 02K6669*

Asset ID RF adapter 08K6065*

ThinkPad Dock 08N1546*

PCI cover 05K6246*

ThinkPad Dock with extension plate 08N1537*

PCI cover with foot 08K7317*

Top cover and screw kit for ThinkPad Dock 12P4143*

ThinkPad Port Replicator 08N1536*

Diskette drive cable 27L0525*

Conversion adapter for diskette drive cable 08K6360*

Video cable 27L0531*

Telephone cable 05K2707*

Parts list

ThinkPad T20, T21, T22 and T23 series 171

Common parts list

Tools

Triconnector wrap plug 72X8546

PC test card 35G4703

Audio wrap cable 66G5180

USB parallel test cable 05K2580

Screwdriver kit 95F3598

Torque screwdriver 05K4695

5 mm socket wrench 05K4694

Screwdriver 27L8126

ThinkPad hardware maintenance diskette version

1.62

Note: Download the file from the following Web site:

http://www.ibm.com/pc/partner/infotips

—

Power cords (system)

IBM power cords for a specific country or region are

usually available only in that country or region:

For 2-pin power cords:

Region P/N

Canada, U.S. 13H5264*

Japan 13H5273*

Argentina 36L8870*

For 3-pin power cords:

Region P/N

Australia, New Zealand 76H3514*

Taiwan, Thailand 76H3516*

Italy 76H3530*

Denmark 76H3520*

U.K., China (Hong Kong S.A.R.) 76H3524*

European countries 76H3518*

India, South Africa 76H3522*

Israel 76H3532*

Korea 76H3535*

China (P.R.C.) (other than Hong Kong S.A.R.) 02K0539*

Switzerland 76H3528*

Parts list

172 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Power cords (docking station)

IBM power cords for a specific country or region are

usually available only in that country or region:

For 3-pin power cords:

Region P/N

Argentina 36L8868*

Australia, New Zealand 75H8988*

Canada, Thailand, U.S. 75H8989*

Denmark 75H8992*

European countries 75H8990*

India, South Africa 75H8993*

Israel 75H8999*

Italy 75H8998*

Japan 75H8996*

Korea 76H3536*

China (P.R.C.) (other than Hong Kong S.A.R) 02K0540*

Switzerland 75H8997*

U.K. 75H8994*

Parts list

ThinkPad T20, T21, T22 and T23 series 173

Notices

References in this publication to IBM products, programs,

or services do not imply that IBM intends to make these

available in all countries in which IBM operates. Any

reference to an IBM product, program, or service is not

intended to state or imply that only that IBM product,

program, or service may be used. Any functionally

equivalent product, program, or service that does not

infringe any of the intellectual property rights of IBM may

be used instead of the IBM product, program, or service.

The evaluation and verification of operation in conjunction

with other products, except those expressly designated by

IBM, are the responsibility of the user.

IBM may have patents or pending patent applications

covering subject matter in this document. The furnishing of

this document does not give you any license to these

patents. You can send license inquiries, in writing, to the

IBM Director of Licensing, IBM Corporation, 500 Columbus

Avenue, Thornwood, NY 10594, U.S.A.

Trademarks

The following terms are trademarks of the IBM Corporation

in the United States or other countries or both:

Asset ID

IBM

OS/2

ThinkLight

ThinkPad

TrackPoint

Ultrabay

UltraPort

Microsoft, Windows, Windows NT, and the Windows logo

are trademarks of Microsoft Corporation in the United

States and/or other countries.

Pentium is trademark of Intel Corporation in the United

States and/or other countries. (For a complete list of Intel

trademarks, see the legal information on

http://www.intel.com/)

Other company, product, or service names may be the

trademarks or service marks of others.

Notices

174 ThinkPad T20, T21, T22, T23 (MT 2647/2648)

Notices

ThinkPad T20, T21, T22 and T23 series 175



Part Number: 62P9631

(1P) P/N: 62P9631

Ibm Thinkpad T22 Users Manual T20, T21, T22, T23 (MT 2647/2648)

ThinkPad T20 t20_hw_maintenance_manual

THINKPAD MT 2631 thinkpad t20 t21 t22 t23

T22 to the manual 4e2236e0-e213-49fe-89eb-ef27a1ca89cd

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