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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)
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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:
v
The common sections provide general information,
guidelines, and safety information required in servicing
computers.
v
The 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
© Copyright IBM Corp. 2002
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iv ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Contents
© Copyright IBM Corp. 2002
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vi ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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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
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:
v
If you are instructed to replace a FRU but the
replacement does not correct the problem, reinstall
the original FRU before you continue.
v
Some 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.
v
If 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.
© Copyright IBM Corp. 2002
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Important service information
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
2.0 MB
4.0 MB
Read and write
Read and write
Not compatible
2
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Safety notices
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 unité en clientèle, vérifiez que
tous les ressorts, vis et autres pièces sont bien en
place et bien fixées. Pour ce faire, secouez l’unité et
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, muß sichergestellt werden,
daß keine Schrauben, Federn oder andere Kleinteile
fehlen oder im Gehäuse vergessen wurden. Der
Computer muß geschüttelt und auf Klappergeräusche
geprüft werden. Metallteile oder-splitter können
Kurzschlüsse erzeugen.
Prima di accendere l’elaboratore dopo che é stata
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.
Introduction
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Safety notices
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)
4
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Safety notices
(continuation of safety notice 2)
Alcune batterie di riserva contengono una piccola
quantità di 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
o l’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.
Introduction
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Safety notices
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 à l’eau. Ne la mettez pas
en court-circuit. Pour la mettre au rebut,
conformez-vous à la 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 quantità di 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
o l’esplosione della batteria stessa.
(continued)
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Safety notices
(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 batería no
apropiada puede provocar la ignición o explosión
de la misma.
Safety notice 4
DANGER
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 polarisé et ne la démontez pas. Ne
l’exposez pas à une temperature supérieure à
100°C, ne la faites pas brûler et n’en exposez pas
le contenu à l’eau. Mettez la pile au rebut
conformément à la réglementation en vigueur. Une
pile inappropriée risque de prendre feu ou
d’exploser.
(continued)
Introduction
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Safety notices
(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
o l’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.
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Safety notices
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 à cristaux 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 algún síntoma del fluido despues de
lavarse.
Introduction
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Safety notices
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.
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Safety notices
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 à la 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 Kurzschluß oder
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
può fornire 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.
Introduction 11
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Safety notices
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 unité remplaçable 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 muß abgeschaltet, 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 batería y, a
continuación, desconecte cualquier cable de
conexión entre dispositivos.
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Safety information
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:
v
Observe good housekeeping in the area of the
machines during and after maintenance.
v
When 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.
v
v
Do not perform any action that causes hazards to the
customer, or that makes the equipment unsafe.
Before you start the machine, ensure that other service
representatives and the customer’s personnel are not in
a hazardous position.
v
Place removed covers and other parts in a safe place,
away from all personnel, while you are servicing the
machine.
v
v
Keep your toolcase away from walk areas so that other
people will not trip over it.
Do 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.
v
v
Insert the ends of your necktie or scarf inside clothing or
fasten it with a nonconductive clip, approximately 8
centimeters (3 inches) from the end.
Do not wear jewelry, chains, metal-frame eyeglasses, or
metal fasteners for your clothing.
Attention: Metal objects are good electrical
conductors.
v
Wear 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.
Introduction 13
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Safety information
v
After service, reinstall all safety shields, guards, labels,
and ground wires. Replace any safety device that is
worn or defective.
v
Reinstall 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.
v
Find 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.
v
v
Do not work alone under hazardous conditions or near
equipment that has hazardous voltages.
Disconnect all power before:
–
–
–
Performing a mechanical inspection
Working near power supplies
Removing or installing main units
v
v
Before 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.
If 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.
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Safety information
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.
v
Regularly inspect and maintain your electrical hand tools
for safe operational condition.
v
v
Do not use worn or broken tools and testers.
Never assume that power has been disconnected from
a circuit. First, check that it has been powered off.
v
v
v
Always 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.
Do 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.
Do 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.)
v
If 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.
Introduction 15
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Safety information
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:
v
Electrical hazards, especially primary power (primary
voltage on the frame can cause serious or fatal
electrical shock)
v
v
Explosive hazards, such as a damaged CRT face or a
bulging capacitor
Mechanical 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
16 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Safety information
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:
v
Keep the parts in protective packages until they are
inserted into the product.
v
v
Avoid contact with other people.
Wear a grounded wrist strap against your skin to
eliminate static on your body.
v
v
v
Prevent the part from touching your clothing. Most
clothing is insulative and retains a charge even when
you are wearing a wrist strap.
Use 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.
Select 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.
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Laser compliance statement
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.
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Laser compliance statement
When a CD-ROM drive, DVD drive or the other laser
product is installed, note the following:
CAUTION:
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
à radiação.
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 ejecución de
procedimientos distintos de los aquí especificados
puede provocar la exposición a radiaciones
peligrosas.
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.
Introduction 19
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Laser compliance statement
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 ! Ne nézzen bele se szabad
szemmel, se optikai eszközökkel. Kerülje a
sugárnyalábbal való érintkezést !.
Aprendo l’unità vengono emesse radiazioni laser.
Non fissare il fascio, non guardarlo direttamente
con strumenti ottici e evitare l’esposizione diretta al
fascio.
Radiación láser al abrir. No mire fijamente ni
examine con instrumental óptico el haz de luz.
Evite la exposición directa al haz.
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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
v
v
v
v
Only certified trained personnel should
service the computer.
Read the entire FRU removal and replacement
page before replacing any FRU.
Use new nylon-coated screws when you
replace FRUs.
Be 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.
v
v
Replace 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.
A 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.
v
Be 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
© Copyright IBM Corp. 2002
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Read this first
__ 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:
v
LCD panel cracked from the application of excessive
force or from being dropped
v
v
Scratched (cosmetic) parts
Distortion, deformation, or discoloration of the cosmetic
parts
v
Cracked or broken plastic parts, broken latches, broken
pins, or broken connectors caused by excessive force
Damage caused by liquid spilled into the system
Damage caused by the improper insertion of a PC Card
or the installation of an incompatible card
Damage caused by foreign material in the diskette drive
Diskette drive damage caused by pressure on the
diskette drive cover or by the insertion of a diskette with
multiple labels
v
v
v
v
v
v
v
Damaged or bent diskette eject button
Fuses blown by attachment of a nonsupported device
Forgotten computer password (making the computer
unusable)
v
Sticky keys caused by spilling a liquid onto the keyboard
The following symptoms might indicate damage
caused by nonwarranted activities:
v
Missing parts might be a symptom of unauthorized
service or modification.
v
If the spindle of a hard-disk drive becomes noisy, it may
have been subjected to excessive force, or dropped.
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Related service information
This section provides information about the following:
v
v
v
v
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
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.
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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
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.
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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.
v
v
v
v
The service partition is created. The system
automatically reboots during this process.
The recovery process copies some files to the
service partition, and PKUNZIPs others.
Follow the prompts. You may be prompted to
change CDs.
When 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) [ ]”.
v
To install the service partition, go to step 4.
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To preload the hard-disk drive without installing the
service partition, press N key.
v
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):
v
v
User HDP—for the user
Master 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.
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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.
3. Remove the backup battery.
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.
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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 x password, where x is 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
v
v
Screen blank mode is called standby mode in
Windows 95 and Windows NT.
Standby 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,
v
v
v
The LCD backlight turns off.
The hard-disk drive motor stops.
The speaker is muted.
2. If you are using the ACPI operating system and you
press Fn+F3,
v
The LCD backlight turns off.
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The hard-disk drive motor stops.
v
3. If the time set on the “Turn off monitor” timer in the
operating system expires,
v
The 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:
v
v
v
The LCD is powered off.
The hard-disk drive is powered off.
The 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:
v
If 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.
v
If 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:
v
v
Press the Fn key.
Open the LCD cover (only if you are using Windows Me
and you entered standby mode by closing the LCD
cover.)
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Turn on the power switch.
v
Also, the computer automatically returns from standby
mode and resumes operation in either of the following
events:
v
The 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.)
v
The 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:
v
The system status, RAM, VRAM, and setup data are
stored on the hard disk.
v
The 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:
v
v
Press the Fn+F12 keys.
If you are using the APM operating system and have set
the mode to Power switch mode [Hibernation], turn
off the power switch.
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v
If 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:
v
If 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.
v
v
If the timer conditions are satisfied in suspend mode.
If 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.
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Checkout guide
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
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.
sources.
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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
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
Run Normal Test
Run Quick Test
CPU/Coprocessor
Systemboard
Video Adapter
Serial Ports
v
v
v
v
v
v
v
v
v
v
Keyboard
Video
Internal Speaker
Mouse
Joystick Test
Diskette
System Load
CD-ROM/DVD Test
Stereo Speaker
802.11 Wireless Radio
Test(*)
Parallel Ports
Fixed Disks
Diskette Drives
Other Devices
ZIP Drive
LS-120/240 Drive
Communication
Wireless LAN(*)
Memory Test – Full
Memory Test – Quick
Notes:
v
In 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.
The 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.
v
v
Video Adapter test supports only the LCD display on
ThinkPad. Before running PC-Doctor DOS, detach the
external Monitor.
v
v
To test ZIP Drive or LS-120/240 Drive, each media is
needed to be inserted before start testing.
Wireless LAN test and 802.11 Wireless Radio Test is
only for some models. Some models do not have
them.
v
v
To test Digital Signature Chip, the chip must be
enabled and initialized.
When 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.
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Diagnostics
Hardware Info
Interactive Tests
U t i l i t y
F1=Help
Quit
Run Normal Test
Run Quick Test
CPU/Coprocessor
Systemboard
Video Adapter
Serial Ports
Parallel Ports
Fixed Disks
Diskette Drives
Other Devices
ZIP Drive
LS-120/240 Drive
Communication
Wireless LAN
Memory Test
Memory Test
-
-
Full
Quick
PC-DOCTOR 2.0 Copyright 2001 PC-Doctor, Inc. All Rights Reserved.
Use the cursor keys and ESC to move in menus. Press ENTER to select.
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
v
v
v
v
v
v
v
v
v
v
System Configuration
Memory Contents
Physical Disk Drives
Logical Disk Drives
VGA Information
IDE Drive Info
PCI Information
PNPISA Info
SMBIOS Info
VESA LCD Info
Utility
v
v
v
v
v
v
v
v
v
v
v
Run External Tests
Surface Scan Hard Disk
Benchmark System
DOS Shell
Tech Support Form
Battery Rundown
View Test Log
Print Log
Save Log
Full Erase Hard Drive
Quick Erase Hard Drive
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Checkout guide
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
v
v
v
Checking the ac adapter
You are here because the computer fails only when the ac
adapter is used:
v
If the power problem occurs only when the port
replicator is used, replace the port replicator.
v
If the power-on indicator does not turn on, check the
power cord of the ac adapter for correct continuity and
installation.
v
If 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:
Pin Voltage (V dc)
1
2
+15.5 to +17.0
Ground
2
1
(16 - 10 V)
3. If the voltage is not correct, replace the ac adapter.
4. If the voltage is acceptable, do the following:
v
v
Replace the system board.
Note: Noise from the ac adapter does not always indicate
a defect.
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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:
Terminal Voltage (V dc)
1
5
+0 to +12.6
Ground (−)
1(+)
2
3
4
5(-)
3. If the voltage is less than +11.0 V dc, the battery pack
has been discharged.
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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.
5. Measure the voltage of the backup battery. See the
following figure.
Red (+)
Wire
Voltage (V dc)
Red
+2.5 to +3.2
Black Ground
Black (-)
v
v
v
If the voltage is correct, replace the system board.
If the voltage is not correct, replace the backup battery.
If the backup battery discharges quickly after
replacement, replace the system board.
General descriptions 37
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Product overview
Product overview
This section presents the following product-unique
information:
v
v
v
v
Specifications
The following table lists the specifications of the ThinkPad
T20, T21, T22 and T23 series :
Feature
Description
T20
Processor
v
v
v
Mobile Intel® Pentium® III processor 650 MHz
Mobile Intel® Pentium® III processor 700 MHz
Mobile Intel® Pentium® III processor 750 MHz
T21
v
v
v
Mobile Intel® Pentium® III processor 750 MHz
Mobile Intel® Pentium® III processor 800 MHz
Mobile Intel® Pentium® III processor 850 MHz
T22
v
v
v
Mobile Intel® Pentium® III processor 800 MHz
Mobile Intel® Pentium® III processor 900 MHz
Mobile Intel® Pentium® III processor 1 GHz
T23
v
v
v
v
Mobile Intel® Pentium® III processor 866
MHz-M
Mobile Intel® Pentium® III processor 1.0
GHz-M
Mobile Intel® Pentium® III processor 1.13
GHz-M
Mobile Intel® Pentium® III processor 1.2
GHz-M
Bus
PCI Bus
architecture
Memory
T20, T21, T22
(standard)
v
128 MB (PC100) (on the system board)
T23
v
v
128 MB (PC133) (on the system board)
256 MB (PC133) (on the system board)
(continued)
ThinkPad T20, T21, T22 and T23 series 41
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Product overview
Feature
Description
Memory
T20, T21, T22
(optional)
v
64 MB, 128 MB, or 256 MB DIMM card
(maximum of 512 MB)
T23
64 MB, 128 MB, 256 MB, or 512 MB DIMM
card (maximum of 1024 MB)
v
CMOS RAM
Display
242 bytes
T20
v
13.3-inch, 16M colors, XGA (1024×768
resolution) TFT color LCD
v
14.1-inch, 16M colors, XGA (1024×768
resolution) TFT color LCD
T21, T22, T23
v
v
v
13.3-inch, 16M colors, XGA (1024×768
resolution) TFT color LCD
14.1-inch, 16M colors, XGA (1024×768
resolution) TFT color LCD
14.1-inch, 16M colors, SXGA+ (1400×1050
resolution) TFT color LCD
Hard-disk drive T20
v
v
v
v
6.0 GB, 2.5-inch, IDE interface
12.0 GB, 2.5-inch, IDE interface
18.0 GB, 2.5-inch, IDE interface
20.0 GB, 2.5-inch, IDE interface
T21, T22
v
v
v
10.0 GB, 2.5-inch, IDE interface
20.0 GB, 2.5-inch, IDE interface
32.0 GB, 2.5-inch, IDE interface
T23
v
v
v
v
v
v
15.0 GB, 2.5-inch, IDE interface
20.0 GB, 2.5-inch, IDE interface
30.0 GB, 2.5-inch, IDE interface
40.0 GB, 2.5-inch, IDE interface
48.0 GB, 2.5-inch, IDE interface
60.0 GB, 2.5-inch, IDE interface
I/O port
v
v
v
v
v
v
v
v
v
External monitor
Line-in
Headphone
Microphone
Mouse or keyboard
Parallel or diskette drive
Port replicator connector
Serial
One universal serial bus (USB) connector for
T20, T21, and T22 series
Two USB connectors for T23
RJ11
v
v
v
v
RJ45 (covered)
TV-out
(continued)
42 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Product overview
Feature
Description
Internal
modem
56.6 Kbps
Audio
v
v
v
Internal microphone
Internal speaker
Software control volume
Infrared
transfer
IrDA 1.1
802.11b (only Mini PCI Type-IIIa IEEE 802.11b wireless LAN
for T23 series) card
PC Card
One Type-III or two Type-II
AC adapter
Bay device
72-watt type
T20
v
v
v
1.44 MB (3-mode), 3.5-inch diskette drive
10-24x CD-ROM drive
6x DVD-ROM drive
T21, T22, T23
v
v
v
v
v
1.44 MB (3-mode), 3.5-inch diskette drive
10-24x CD-ROM drive
8x DVD-ROM drive
CD-RW drive
DVD/CD-RW combo drive
ThinkPad T20, T21, T22 and T23 series 43
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Product overview
Status indicators
The system status indicators show the status of the
computer, as follows:
1
2
3
4
5
6
7
8
Indicator
Meaning
ꢀ1ꢁ 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.
ꢀ2ꢁ 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.
ꢀ3ꢁ Caps lock
Green:
Caps Lock mode is enabled. To
enable or disable Caps Lock
mode, press Fn + Caps Lock key.
(continued)
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Product overview
Indicator
Meaning
Green:
ꢀ4ꢁ Scroll lock
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.
ꢀ5ꢁ 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.
ꢀ6ꢁ 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.
ꢀ7ꢁ Standby
status
Green:
Blinking green:
The computer is entering standby
The computer is in standby mode.
mode or hibernation mode, or is
resuming normal operation. This
indicator does not blink in Windows
2000, Windows Me, and Windows
XP.
ꢀ8ꢁ 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.
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Product overview
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
Modem
1. Diagnostics --> Video Adapter
2. Interactive Tests --> Video
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
If the TrackPoint does not work, check the
pointing device 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:
v
Interactive Tests --> Mouse
Hard-disk drive Diagnostics --> Fixed Disks
(continued)
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Product overview
FRU
Applicable test
Diskette drive
1. Diagnostics --> Diskette Drives
2. Interactive Tests --> Diskette
CD-ROM, DVD, 1. Diagnostics --> Other Devices -->
CD-RW or
CD-RW/DVD
combo drive
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.
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Product overview
Fn key combinations
The following table shows the function of each combination
of Fn with a function key.
Key
Description
combination
Fn+F1
Fn+F2
Fn+F3
Reserved.
Reserved.
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
Fn+F6
Fn+F7
Reserved.
Reserved.
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:
v
v
v
CRT display
LCD+CRT display
LCD
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.
Reserved.
Reserved.
Fn+F10
Fn+F11
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
Fn+Home
Fn+End
Turn the ThinkLight on or off.
The LCD becomes brighter.
The LCD becomes less bright.
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Symptom-to-FRU index
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, n can be any
number.
If no numeric code is displayed, check the narrative
descriptions of symptoms. If the symptom is not described
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
System board.
Bad CRC1, stop POST
task—The EEPROM checksum
is not correct.
0187
System board.
System board.
EAIA data access error—The
access to EEPROM is failed.
0188
Invalid RFID serialization
information area or bad
CRC2—The EEPROM
checksum is not correct.
0189
System board.
Invalid RFID configuration
information area—The
EEPROM checksum is not
correct.
0190
1. Charge the battery pack.
Critical low-battery error
2. Battery pack.
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Symptom-to-FRU index
Symptom or error
0193
FRU or action, in sequence
Enter the supervisor
RF antenna has been removed password.
0194
Enter the supervisor
The computer has been carried password.
through a security gate
0195
1. Enter IBM BIOS Setup
Security hardware tamper
detected
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
1. Enter IBM BIOS Setup
Utility by entering
Security hardware removed
supervisor password, and
select “Password” -->
“IBM Security Chip” -->
“Clear IBM Security Chip”
to clear this error.
2. Security chip.
3. System board.
0197
The remote configuration for
the security chip has failed.
Confirm the operation and try
again.
Invalid remote change
requested
01C9
1. Remove the Ethernet
device that you installed;
or press Esc to ignore the
warning message.
More than one Ethernet devices
are found. Remove one of
them. Press <Esc> to continue.
2. System board.
0200
1. Reseat the hard-disk
drive.
2. Load Setup Defaults in IBM
BIOS Setup Utility.
3. Hard-disk drive.
4. System board.
Hard disk error—The hard disk
is not working.
021x
Keyboard error
Run interactive tests of the
keyboard and the auxiliary
input device.
0220
Load Setup Defaults in IBM
BIOS Setup Utility.
Monitor type error—Monitor
type does not match the one
specified in CMOS.
0230
System board.
Shadow RAM error—Shadow
RAM fails at offset nnnn.
0231
1. DIMM.
System RAM error—System
RAM fails at offset nnnn.
2. System board.
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Symptom-to-FRU index
Symptom or error
FRU or action, in sequence
0232
1. DIMM.
Extended RAM
error—Extended RAM fails at
offset nnnn.
2. System board.
0250
Replace the backup battery
and run IBM BIOS Setup
Utility to reset the time and
date.
System battery error—System
battery is dead.
0251
Replace the backup battery
and run IBM BIOS Setup
Utility to reset the time and
date.
System CMOS checksum
bad—Default configuration
used.
0252
Reset the password by
Password checksum bad—The running IBM BIOS Setup
password is cleared.
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
1. Replace the backup
battery and run IBM BIOS
Setup Utility to reset the
time and date.
Real time clock error
2. System board.
0271
Run IBM BIOS Setup Utility to
Date and time error—Neither
the date nor the time is set in
the computer.
reset the time and date.
02B2
Incorrect drive A type
1. Diskette drive.
2. External FDD cable.
3. I/O card.
02F4
1. Load Setup Defaults in
IBM BIOS Setup Utility.
2. Replace the backup battery.
3. System board.
EISA CMOS not writable
02F5
1. DIMM.
DMA test failed
2. System board.
02F6
1. DIMM.
Software NMI failed
2. System board.
02F7
1. DIMM.
Fail-safe timer NMI failed
2. System board.
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Symptom-to-FRU index
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.
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Symptom-to-FRU index
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, 1. System board.
and a blank or unreadable
LCD.
2. LCD assembly.
3. DIMM.
Two short beeps with error
codes.
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 A power-on password or a
appears.
supervisor password is set.
Type the password and press
Enter.
The hard-disk password prompt A hard-disk password is set.
appears.
Type the password and press
Enter.
The DOS full screen looks
smaller.
Start the ThinkPad
Configuration program and set
the Screen expansion
function.
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Symptom-to-FRU index
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:
v
XGA: 8 or more bright dots, 8 or more dark dots,
or a total of 9 or more bright and dark dots.
SXGA+: 11 or more bright dots, 13 or more dark
dots, or a total of 16 or more bright and dark
dots.
v
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.
v
v
v
LCD backlight not working.
LCD too dark.
LCD brightness cannot be
adjusted.
1. Reseat the LCD
connectors.
2. LCD assembly.
3. System board.
v
LCD contrast cannot be
adjusted.
v
v
v
v
LCD screen unreadable.
Characters missing pixels.
Screen abnormal.
1. See important note for
“LCD-related symptoms.”
2. Reseat all LCD connectors.
3. LCD assembly.
Wrong color displayed.
4. System board.
Horizontal or vertical lines
displayed on LCD.
LCD assembly.
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Symptom-to-FRU index
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
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
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FRU replacement notices
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:
v
v
They maintain tight connections.
They do not easily come loose, even with shock or
vibration.
v
v
They are harder to tighten.
They should be used only once.
Do the following when you service this machine:
v
Always use new screws.
v
v
Use a torque screwdriver if you have one.
Tighten screws as follows:
v
Plastic to plastic
Turn an additional 90 degrees after the screw head
touches the surface of the plastic part:
90 degrees more
(Cross-section)
v
Logic card to plastic
Turn an additional 180 degrees after the screw head
touches the surface of the logic card:
180 degrees more
(Cross-section)
v
Torque driver
If you have a torque driver, refer to the “Torque” column
for each step.
56 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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FRU replacement notices
v
Make 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
v
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
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FRU replacement notices
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.
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Removing and replacing a FRU
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.
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
8. When replacing a FRU, use the correct screw as
shown in the procedures.
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.
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).
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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.
2
1
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1020 Backup battery
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.
For access, remove this FRU:
v
1
2
Step
ꢀ1ꢁ
Screw (quantity)
Torque
M2.5 × 3.5 mm, (1)
0.392 Nm
(4 kgfcm)
(continued)
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Cable routing: When attaching the backup battery to the
holder, route the battery cable as in the
following figure.
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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
1
Note: The hard disk is attached to the cover.
Step
Screw (quantity)
ꢀ1ꢁ
Coin screw (1) or security screw (1)
Note: Use a 2.5-mm Allen wrench to remove the security screw.
(continued)
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When removing the hard-disk drive, open the LCD a little
as shown in the figure.
2
3
4
3
When installing: Make sure that the HDD connector is
firmly connected.
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1040 DIMM
For access, remove this FRU:
v
Note: Loosen the screw ꢀ1ꢁ, but do not remove it.
1
2
4
3
3
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.
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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 ꢀ6ꢁ. This slot also supports a Mini PCI modem
card or Mini PCI network card.
3
4
(B)
(A)
4
5
(B)
(A)
6
(continued)
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Removing and replacing a FRU
When installing: Make sure not to pinch the connector
cable when re-installing the Mini PCI
adapter.
For T23 series
Note: Loosen the screw ꢀ1ꢁ, but do not remove it.
1
2
(continued)
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In step ꢀ3aꢁ and ꢀ3bꢁ, pull the tab of the each antenna
cables to unplug the cables.
3a
3b
4
4
When installing: Plug the gray antenna cable ꢀ3aꢁ into
jack J1 (MAIN), and the black antenna
cable ꢀ3bꢁ into jack J2 (AUX).
5
6
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.
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Removing and replacing a FRU
1060 Ethernet daughter card
Note
This section is only for the following models of T23
series;
v
v
All models of MT2647 excepting xQx, L4x
All models of MT2648
Other models do not have the Ethernet daughter
card (EDC).
For access, remove this FRU:
v
Note: Loosen the screw ꢀ1ꢁ, but do not remove it.
1
2
(continued)
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4
5
6
When installing: Make sure that both of the connectors
ꢀ4ꢁ and ꢀ6ꢁ are firmly attached.
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Removing and replacing a FRU
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 ꢀ1ꢁ the lever
pops out. Pull the lever a little in step ꢀ2ꢁ to release
the device from the bay.
1
2
3
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Removing and replacing a FRU
1080 Keyboard
For access, remove these FRUs, in order:
v
v
v
v
For T20, T21 and T22 series
1
Step
Screw (quantity)
Torque
ꢀ1ꢁ
M2.5 × 14 mm, nylon-coated (2)
0.392 Nm
(4 kgfcm)
Note: T20, T21 and T22 series do not have the removal
procedures ꢀ2ꢁ to ꢀ4ꢁ. After step ꢀ1ꢁ, go to step
ꢀ5ꢁ.
(continued)
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Removing and replacing a FRU
For T23 series
Note: Loosen the screw ꢀ2ꢁ, but do not remove it.
1
2
3
Step
Screw (quantity)
Torque
ꢀ1ꢁ
M2.5 × 14 mm, nylon-coated (2)
0.392 Nm
(4 kgfcm)
4
Step
Screw (quantity)
Torque
ꢀ4ꢁ
M2.5 × 11.5 mm, nylon-coated (1)
0.392 Nm
(4 kgfcm)
(continued)
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Removing and replacing a FRU
Note: Step ꢀ5ꢁ to ꢀ10ꢁ are common for all models.
6
5
5
(continued)
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Removing and replacing a FRU
8
9
7
9
8
7
10
9
(continued)
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Removing and replacing a FRU
Note: Before installing a new keyboard, attach the
easy-button cover as follows:
4
3
2
1
1
(continued)
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Removing and replacing a FRU
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)
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Removing and replacing a FRU
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 ꢀ1ꢁ . Then, with your fingers
in those slots as in ꢀ2ꢁ, 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 ꢀ3ꢁ.
3
1
1
2
(continued)
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Removing and replacing a FRU
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.
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Removing and replacing a FRU
1090 Keyboard CRU insulator
For access, remove these FRUs, in order:
v
v
v
v
v
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.
1
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Removing and replacing a FRU
1100 Hinge cover
For access, remove these FRUs, in order:
v
v
v
v
v
v
Note: Step ꢀ1ꢁ is common for all models.
1
Step
Screw (quantity)
Torque
ꢀ1ꢁ
M2.5 × 14 mm, nylon-coated (3)
0.392 Nm
(4 kgfcm)
(continued)
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Removing and replacing a FRU
For T20 and T21 series
a
a
2
4
3
Step
Screw (quantity)
Torque
ꢀ2ꢁ
M2.5 × 4.8 mm, nylon-coated (1)
0.392 Nm
(4 kgfcm)
When installing:
1. Install the hinge cover according to the step ꢀ3ꢁ, ꢀ4ꢁ
and then tighten the screw ꢀ2ꢁ. In step ꢀ3ꢁ, take care
not to damage the lens.
2. Make sure that both latches ꢀaꢁ are firmly attached
and snap into place.
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Removing and replacing a FRU
For T22 series
2
3
Step
Screw (quantity)
M2.5 × 14 mm, nylon-coated (1)
Torque
ꢀ2ꢁ
0.392 Nm
(4 kgfcm)
(continued)
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Removing and replacing a FRU
a
a
4
6
5
Step
Screw (quantity)
Torque
ꢀ4ꢁ
M2.5 × 4.8 mm, nylon-coated (1)
0.392 Nm
(4 kgfcm)
When installing:
1. Install the hinge cover according to the step ꢀ5ꢁ, ꢀ6ꢁ
and then tighten the screw ꢀ4ꢁ. In step ꢀ5ꢁ, take care
not to damage the lens.
2. Make sure that both latches ꢀaꢁ are firmly attached
and snap into place.
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Removing and replacing a FRU
For T23 series
a
a
2
4
3
Step
Screw (quantity)
M2.5 × 4.8 mm, nylon-coated (1)
Torque
ꢀ2ꢁ
0.392 Nm
(4 kgfcm)
When installing:
1. Install the hinge cover according to the step ꢀ3ꢁ, ꢀ4ꢁ
and then tighten the screw ꢀ2ꢁ. In step ꢀ3ꢁ, take care
not to damage the lens.
2. Make sure that both latches ꢀaꢁ are firmly attached
and snap into place.
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Removing and replacing a FRU
1110 Keyboard bezel
For access, remove these FRUs, in order:
v
v
v
v
v
v
v
For T20, T21 and T22 series
1
Step
Screw (quantity)
Torque
ꢀ1ꢁ
M2.5 × 3.5 mm, nylon-coated (3)
0.392 Nm
(4 kgfcm)
(continued)
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Removing and replacing a FRU
For T23 series
Note: Loosen the screw ꢀ1ꢁ, but do not remove it.
1
2
3
Step
Screw (quantity)
Torque
ꢀ3ꢁ
M2.5 × 11.5 mm, nylon-coated (1)
0.392 Nm
(4 kgfcm)
(continued)
90 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Removing and replacing a FRU
4
Step
Screw (quantity)
Torque
ꢀ4ꢁ
M2.5 × 3.5 mm, nylon-coated (3)
0.392 Nm
(4 kgfcm)
(continued)
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Removing and replacing a FRU
When installing, do as follows:
v
Make sure that the ꢀaꢁ-part is firmly attached as shown
in the figure.
v
Make sure that all of the latches of the keyboard bezel
ꢀbꢁare firmly attached.
a
b
b
b
b
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Removing and replacing a FRU
1120 Fan assembly
For T20, T21, T22 series
For access, remove these FRUs, in order:
v
v
v
v
v
v
1
1
a
b
2
Notes:
1. ꢀaꢁ-part is for T21, T22 series only. Other models do
not have this bracket.
2. ꢀbꢁ -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
ꢀ1ꢁ
M2 × 13.5 mm, nylon-coated (4)
0.245 Nm
(2.5 kgfcm)
(continued)
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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 ꢀaꢁ-part of
the fan as shown in the following figure.
a
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Removing and replacing a FRU
For T23 series
For access, remove these FRUs, in order:
v
v
v
v
v
v
v
v
1
2
3
Step
ꢀ1ꢁ
Screw (quantity)
Torque
M2 × 13.5 mm, nylon-coated (1)
0.245 Nm
(2.5 kgfcm)
ꢀ2ꢁ
M2.5 × 14 mm, nylon-coated (1)
0.392 Nm
(4 kgfcm)
(continued)
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Removing and replacing a FRU
4
6
5
Step
Screw (quantity)
M2.0 × 13.5 mm, nylon-coated (3)
Torque
ꢀ4ꢁ
0.245 Nm
(2.5 kgfcm)
When installing: Apply the thermal grease (05K5751) on
the ꢀaꢁ-part of the fan as shown in the
following figure.
a
ThinkPad T20, T21, T22 and T23 series 97
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Removing and replacing a FRU
1130 CPU
For access, remove these FRUs, in order:
v
v
v
v
v
v
v
For T20, T21 and T22 series
Rotate the the head of the screw (A) to the direction of the
arrow ꢀaꢁ to release the lock and then remove the CPU.
2
1
a
b
A
c
When installing:
1. When attaching the CPU to the socket, do as shown in
the step ꢀcꢁ.
2. Rotate the head of the screw (A) to the direction of the
arrow ꢀbꢁ to lock the CPU.
98 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Removing and replacing a FRU
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 ꢀ1ꢁ, ꢀ2ꢁ and ꢀaꢁ or steps ꢀ1'ꢁ, ꢀ2ꢁ and ꢀa'ꢁ.
Rotate the head of the screw to the direction of the arrow
ꢀ1ꢁ or ꢀ1'ꢁ to release the lock and then remove the CPU.
a
1
1'
a'
2
When installing: Rotate the head of the screw to the
direction of the arrow ꢀaꢁ or ꢀa'ꢁ to lock
the CPU.
ThinkPad T20, T21, T22 and T23 series 99
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Removing and replacing a FRU
1140 PC Card slot assembly
For T20, T21, T22 series
For access, remove these FRUs, in order:
v
v
v
v
v
v
1
2
Step
ꢀ1ꢁ
Screw (quantity)
Torque
M2 × 13.5 mm, nylon-coated (4)
0.245 Nm
(2.5 kgfcm)
(continued)
100 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Removing and replacing a FRU
When installing the PC card slot assembly, do as shown in
the figure.
ThinkPad T20, T21, T22 and T23 series 101
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Removing and replacing a FRU
For T23 series
For access, remove these FRUs, in order:
v
v
v
v
v
v
v
v
1
1
2
4
3
Step
ꢀ1ꢁ
Screw (quantity)
Torque
M2 × 13.5 mm, nylon-coated (4)
0.245 Nm
(2.5 kgfcm)
102 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Removing and replacing a FRU
Before installing new speaker for T22 and T23 series:
Secure speaker RF bracket (ꢀaꢁ) to the new speaker with
an adhesive tape inside of the bracket.
For T22 series
a
For T23 series
a
104 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Removing and replacing a FRU
1160 Hard-disk bay
For access, remove these FRUs, in order:
v
v
v
v
v
v
v
v
v
Note: Step ꢀ3ꢁ and ꢀ4ꢁ are only for the case when Asset
ID RF adapter has been attached into the hard-disk
bay.
4
3
1
2
Step
Screw (quantity)
Torque
ꢀ1ꢁ
M2.5 × 4.8 mm, nylon-coated (1)
0.392 Nm
(4 kgfcm)
ThinkPad T20, T21, T22 and T23 series 105
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Removing and replacing a FRU
When installing: Make sure the followings:
v
v
ꢀaꢁ-parts of the insulation do not come off.
ꢀbꢁ-part (ꢀb'ꢁs are only for T23 series) is not turned
over.
v
Holes in the guide rail and in the aluminium sheet are
aligned, and the aluminium sheet does not protrude in
the ꢀcꢁ-parts. The protruding parts of the sheet can
cause electrical short.
a
b
a
c
b'
a
b'
106 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Removing and replacing a FRU
1170 Ultrabay 2000 slot
For access, remove these FRUs, in order:
v
v
v
v
v
v
v
v
For T20 series
1
2
Step
Screw (quantity)
Torque
ꢀ1ꢁ
M2.5 × 14 mm, nylon-coated (1)
0.392 Nm
(4 kgfcm)
Note: T20 series do not have the removal procedure ꢀ3ꢁ
and ꢀ4ꢁ. After step ꢀ2ꢁ, go to step ꢀ5ꢁ.
When installing: Make sure that the FPC connector is
firmly attached.
(continued)
ThinkPad T20, T21, T22 and T23 series 107
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Removing and replacing a FRU
For T21 and T22 series
2
1
Note: T21 series do not have the removal procedure ꢀ3ꢁ
and ꢀ4ꢁ. After step ꢀ2ꢁ, go to step ꢀ5ꢁ.
When installing: Make sure that the FPC connector is
firmly attached.
(continued)
108 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Removing and replacing a FRU
For T23 series
1
2
3
Step
Screw (quantity)
Torque
ꢀ1ꢁ
M2 × 13.5 mm, nylon-coated (1)
0.245 Nm
(2.5 kgfcm)
ꢀ2ꢁ
M2.5 × 14 mm, nylon-coated (1)
0.392 Nm
(4 kgfcm)
(continued)
ThinkPad T20, T21, T22 and T23 series 109
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Removing and replacing a FRU
4
Note: The models with 13.3-in. XGA LCD in T20 series
and in T21 series do not have FPC bracket (ꢀ5ꢁ).
For those models, skip step ꢀ5ꢁ.
5
a
When installing: Make sure that the FPC bracket is firmly
attached as shown in the figure ꢀaꢁ.
(continued)
110 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Removing and replacing a FRU
Note: Step ꢀ6ꢁ to step ꢀ9ꢁ are common for T20, T21, T22
and T23 series.
6
Step
Screw (quantity)
Torque
ꢀ6ꢁ
M2.5 × 4.8 mm, nylon-coated (1)
0.392 Nm
(4 kgfcm)
7
8
9
Step
Screw (quantity)
Torque
ꢀ7ꢁ
M2 × 13.5 mm, nylon-coated (2)
0.245 Nm
(2.5 kgfcm)
ꢀ8ꢁ
M2.5 × 4.8 mm, nylon-coated (2)
0.392 Nm
(4 kgfcm)
ThinkPad T20, T21, T22 and T23 series 111
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Removing and replacing a FRU
When installing: Make sure that the guide of the slot is
firmly attached ꢀ1ꢁand if the eject lever
has been poped out, push it back in the
direction of arrow ꢀ2ꢁ until it snaps, and
then push the upper-right corner of the
slot ꢀ3ꢁ to fix it firmly.
1
2
3
112 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Removing and replacing a FRU
1180 System board
For access, remove these FRUs, in order:
v
v
v
v
v
v
series)
v
v
v
v
v
v
v
v
v
v
v
For T20, T21, T22 series
4
1
2
3
5
Step
Screw (quantity)
M2.5 × 4.8 mm, nylon-coated (1)
Torque
ꢀ4ꢁ
0.392 Nm
(4 kgfcm)
(continued)
ThinkPad T20, T21, T22 and T23 series 113
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Removing and replacing a FRU
When installing: Make sure that all of the guides are
firmly attached ꢀ1ꢁ and you have
fastened the connector firmly to the
underside of the system board ꢀ2ꢁ.
2
1
1
1
114 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Removing and replacing a FRU
When installing: Make sure that all of the guides are
firmly attached ꢀ1ꢁ and you have
fastened the connector firmly to the
underside of the system board ꢀ2ꢁ.
2
1
1
1
116 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Removing and replacing a FRU
1190 Secure chip
Note
This section is only for the following models;
v
v
MT2647-5Lx, 9Lx, DLT, HLU
MT2647-5Dx, 5Fx, 5Hx, 5Jx, 5Nx, 5Mx, 9Dx, 9Fx,
9Hx, 9Jx, 9Nx, 9Mx, DFx, HNx, NNx
MT2647-5Rx, 5Sx, 5Ux, 9Rx, 9Sx, 9Ux, HSU
v
Other models do not have the secure chip.
For access, remove these FRUs, in order:
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
When installing: Make sure that the connector is firmly
attached.
ThinkPad T20, T21, T22 and T23 series 117
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Removing and replacing a FRU
1200 Microphone cable
For access, remove these FRUs, in order:
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
Cable routing: When replacing the cable, make sure the
connector is firmly attached into place ꢀaꢁ.
Cable slacking is only allowed at the
ꢀbꢁ-part of the frame.
b
a
118 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Removing and replacing a FRU
2010 LCD assembly
For access, remove these FRUs, in order:
v
v
v
v
v
v
v
v
v
v
1
1
Step
ꢀ1ꢁ
Screw (quantity)
Torque
M2.5 × 4.8 mm, nylon-coated (4)
0.392 Nm
(4 kgfcm)
(continued)
ThinkPad T20, T21, T22 and T23 series 119
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Removing and replacing a FRU
For models excepting MT2647-xLx, xNx
4
2
4
3
Step
Screw (quantity)
Torque
ꢀ2ꢁ
M2.5 × 14 mm, nylon-coated (1)
0.392 Nm
(4 kgfcm)
ꢀ4ꢁ
M2.5 × 4.8 mm, nylon-coated (2)
0.392 Nm
(4 kgfcm)
120 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Removing and replacing a FRU
For MT2647-xLx, xNx
5
2
4
5
3
Step
Screw (quantity)
Torque
ꢀ2ꢁ
M2.5 × 14 mm, nylon-coated (1)
0.392 Nm
(4 kgfcm)
ꢀ5ꢁ
M2.5 × 4.8 mm, nylon-coated (2)
0.392 Nm
(4 kgfcm)
ThinkPad T20, T21, T22 and T23 series 121
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Removing and replacing a FRU
2020 Front bezel
For access, remove these FRUs, in order:
v
v
v
v
v
v
v
v
v
v
2
1
1
1
Step
ꢀ1ꢁ
Screw (quantity)
Torque
M2.5 × 4.8 mm, nylon-coated (3)
0.392 Nm
(4 kgfcm)
122 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Removing and replacing a FRU
2030 Inverter card
For access, remove these FRUs, in order:
v
v
v
v
v
v
v
v
v
v
v
1
2
3
Cable routing: When replacing the inverter card, route
the connector cable as in the following
figure:
ThinkPad T20, T21, T22 and T23 series 123
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Removing and replacing a FRU
2040 LCD panel
For access, remove these FRUs, in order:
v
v
v
v
v
v
v
v
v
v
v
v
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 ꢀ1aꢁ. Remove the
connector cover for the others as shown in the figure ꢀ1bꢁ.
1a
1b
(continued)
124 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Removing and replacing a FRU
2a
2
2a
2a
2
2a
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)
ꢀ2ꢁ
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)
ꢀ2aꢁ
M2 × 4 mm, nylon-coated (4)
0.245 Nm
(2.5 kgfcm)
(continued)
ThinkPad T20, T21, T22 and T23 series 125
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Removing and replacing a FRU
4
3
7
5
5
6
(continued)
126 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Removing and replacing a FRU
Cable routing: When installing the LCD, route the
connector cable as in the following figure:
ThinkPad T20, T21, T22 and T23 series 127
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Removing and replacing a FRU
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
v
v
v
v
v
v
v
v
v
v
v
v
1
1
(continued)
128 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Removing and replacing a FRU
Strip off the insulation tapes ꢀ2ꢁ securing the antenna
cables.
2
2
3
3
ThinkPad T20, T21, T22 and T23 series 129
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Removing and replacing a FRU
Cable routing: Route the antenna cables as follows;
1. Hook the black antenna cable to projection (ꢀ1ꢁ) on the
right corner of the rear cover.
2. Route the black antenna cable to go through cable
guides ꢀ2ꢁ and ꢀ3ꢁ.
3. Hook the gray antenna cable to projection (ꢀ4ꢁ) on the
left corner of the rear cover.
4. Route the gray antenna cable to go through cable
guides ꢀ5ꢁ.
5. Make sure that both of the cables are not twisted.
6. Stick insulation tapes ꢀ6ꢁ, ꢀ7ꢁ and ꢀ8ꢁ.
2
6
4
1
8
3
5
7
130 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Removing and replacing a FRU
2060 Sub card
For access, remove these FRUs, in order:
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
2
3
1
2
Step
ꢀ1ꢁ
Screw (quantity)
Torque
Hex stud (6)
0.392 Nm
(4 kgfcm)
ꢀ2ꢁ
M2.5 × 4.8 mm, nylon-coated (4)
0.392 Nm
(4 kgfcm)
(continued)
ThinkPad T20, T21, T22 and T23 series 131
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Removing and replacing a FRU
a
4
When installing, do the following:
v
Attach the I/O card spacer (ꢀaꢁ) onto the new sub card
and make sure that the connector is firmly attached.
Make sure that the eject lever is poped out ꢀbꢁ and then
install the sub card.
v
v
v
Take care not to damage the switch on the sub card (A).
Make sure that the guide of the card is firmly attached
ꢀcꢁ as shown in the figure.
A
c
b
132 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Removing and replacing a FRU
3010 ThinkPad Dock PCI cover
Before replacing the PCI cover:
There are two types of ThinkPad Dock, as follows:
v
ThinkPad Dock: FRU no. 08N1546 (PCI cover: FRU no.
05K6246)
v
ThinkPad 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.
ThinkPad T20, T21, T22 and T23 series 133
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Removing and replacing a FRU
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).
1
1
2
(Bottom view)
134 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Removing and replacing a FRU
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) .
1
(Rear view)
Step
Screw (quantity)
M2.5 × 4.8 mm (2)
Torque
ꢀ1ꢁ
0.392 Nm
(4 kgfcm)
(continued)
ThinkPad T20, T21, T22 and T23 series 135
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Removing and replacing a FRU
Make sure that the system lock key A is set to the Unlock
position. Release the front latches in step ꢀ3ꢁ, and then
remove the top cover ꢀ4ꢁ. For step ꢀ5ꢁ, see the inside
view, shown in the circle.
5
4
3
A
ThinkPad T20, T21, T22 and T23 series 137
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Removing and replacing a FRU
When replacing the top cover, do the following:
v
Make sure that the springs are placed correctly.
v
Make sure that the device release lever is seated
correctly.
(continued)
138 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Removing and replacing a FRU
v
Make sure that the release button works correctly.
ThinkPad T20, T21, T22 and T23 series 139
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Locations
Locations
Front view
ꢀ1ꢁ
ꢀ2ꢁ
ꢀ3ꢁ
System status indicators
Power switch
Battery, standby mode, and Ultrabay status
indicators
ꢀ4ꢁ
ꢀ5ꢁ
ꢀ6ꢁ
Bay latch
Eject button
Ultrabay 2000 device
Note: The Ultrabay 2000 accepts storage devices,
such as a DVD drive or a CD-ROM drive.
TrackPoint pointing stick
TrackPoint buttons
ThinkPad button
ꢀ7ꢁ
ꢀ8ꢁ
ꢀ9ꢁ
ꢀ10ꢁ Volume and mute buttons
1
10
2
9
3
8
7
4
5
6
140 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Locations
Rear view
ꢀ1ꢁ
ꢀ2ꢁ
ꢀ3ꢁ
ꢀ4ꢁ
ꢀ5ꢁ
ꢀ6ꢁ
ꢀ7ꢁ
ꢀ8ꢁ
ꢀ9ꢁ
Security keyhole
TV-out connector
Serial connector
Parallel connector
External-monitor connector
Modem connector
Ethernet connector
Power jack
Universal serial bus (USB) connector
Note: T23 series have two USB connectors.
ꢀ10ꢁ External-input-device connector
1
2
3
4
5
6
7
8
9
10
ThinkPad T20, T21, T22 and T23 series 141
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Locations
Bottom view
ꢀ1ꢁ
ꢀ2ꢁ
ꢀ3ꢁ
ꢀ4ꢁ
ꢀ5ꢁ
ꢀ6ꢁ
ꢀ7ꢁ
ꢀ8ꢁ
ꢀ9ꢁ
Built-in stereo speakers
Battery pack
Battery pack latches
Docking connector
Mini PCI card slot
DIMM
PC card slots
PC card eject button
Infrared port
ꢀ10ꢁ Stereo headphone jack
ꢀ11ꢁ Stereo line-in jack
ꢀ12ꢁ Microphone jack
ꢀ13ꢁ Hard-disk drive
ꢀ14ꢁ LCD latches
3
4
2
1
5
6
7
8
9
14
10
11
12
13
142 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Parts list
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
Mini PCI LCD
HDD
device adapter
T20 (Memory: 128 MB)
(*): Memory 64 MB
(**): Memory 256 MB
2647-21x, 61x
2647-24x, 64x
CMG
650
CD-
ROM
Modem
13.3-in.
XGA
6 GB
Combo
(Intel)
2647-A1x
2647-31x
—
—
—
DVD-
ROM
(6x)
Modem
14.1-in.
XGA
6 GB
2647-2EY
CD-
ROM
Combo
(3Com)
13.3-in.
XGA
12 GB
2647-32x, 72x
(*)
CMG
700
Modem
Modem
—
2647-T1x (**)
14.1-in.
XGA
2647-41x, 81x,
43x
DVD-
ROM
(6x)
2648-41x, 81x
2647-42x, 82x
2648-42x, 82x
2647-44x, 84x
2648-44x, 84x
2647-46x, 86x
2648-46x, 86x
2647-45x
Combo
(Intel)
Combo
(3Com)
FDD
Ethernet
—
2647-B1x
—
—
2647-L1x, L2x
CMG
750
CD-
ROM
Modem
14.1-in.
XGA
20 GB
2647-52x, 92x
2647-55x, 95x
DVD-
ROM
(6x)
Combo
(Intel)
2647-C1x
—
—
—
(continued)
ThinkPad T20, T21, T22 and T23 series 143
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Parts list
Model
CPU
Bay
Mini PCI LCD
HDD
device adapter
T21 (Memory: 128 MB)
2647-27x, 67x
2647-2Ax, 6Ax
CMG
750
CD-
ROM
Modem
13.3-in.
XGA
10 GB
Combo
(Xircom)
2647-4Bx, 8Bx
Combo
(3Com)
2647-47x, 49x, CMG
DVD-
ROM
(8x)
Modem
14.1-in.
XGA
20 GB
87x, L7x
800
2648-47x, 87x
2647-4Ax, 8Ax
Combo
(Xircom)
2648-4Ax, 8Ax
Combo
(Intel)
2647-4Bx, 8Bx
2648-4Bx, 8Bx
2647-57x, 97x
2647-5Ax, 9Ax
Combo
(3Com)
CMG
850
Modem
14.1-in.
SXGA+
32 GB
Combo
(Xircom)
2647-5Bx, 9Bx
Combo
(3Com)
T22 (Memory: 128 MB)
2647-3Cx, 7Cx CMG
CD-
ROM
Modem
13.3-in.
XGA
10 GB
20 GB
800
2647-3Ex, 7Ex,
Combo
(Intel)
B2x, B3x, B4x,
B5x
2647-4Cx,4Gx, CMG
8Gx, 8Cx,M2x, 900
M3x, LCx
DVD-
ROM
(8x)
Modem
14.1-in.
XGA
2648-4Cx, 8Cx
2647-4Ex, 8Ex,
M4x, M5x
Combo
(Intel)
2648-4Ex, 8Ex
2647-4Gx, 8Gx
2648-4Gx, 8Gx
2647-T2x
Combo
(3Com)
FDD
Combo
(Intel)
2647-5Cx, 9Cx CMG
DVD-
ROM
(8x)
Modem
14.1-in.
SXGA+
32 GB
1G
2647-5Ex, 9Ex,
Combo
(Intel)
M6x
(continued)
144 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Parts list
Model
CPU
Bay
Mini PCI LCD
HDD
device adapter
T23 (Memory: 128 MB)
2647-2Kx except Tual
(**): Memory 256 MB
CD-
ROM
Modem
13.3-in. 15 GB
XGA
2KC
866
2647-6Kx except
xxC
2647-AKx, BAx,
BJx, EKx
2647-2KC, 6KC
2647-2Rx, 6Rx
DVD-
ROM
(8x)
Tual
1.0
CD-
ROM
14.1-in. 20 GB
XGA
2647-2Tx, 2UC,
6UC, 3RG, 7RG
DVD-
ROM
(8x)
2648-2Tx
2647-3TK, 7TK
2647-T4x (**)
CD-
ROM
30 GB
Tual
1.13
14.1-in.
XGA
2647-4Mx, 8Mx,
MMx
DVD-
ROM
(8x)
2648-4Mx, 8Mx
2647-4Qx, 8Qx
*1
2647-4Nx, 8Nx,
GNU, KNG, MNx
802.11/
v.90
14.1-in.
XGA
with
antenna
2648-4Nx, 8Nx
2647-4Rx, 8Rx
2648-4Rx, 8Rx
Tual
1.2
Modem
14.1-in. 40 GB
XGA
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. 48 GB
SXGA+
2647-5Lx, 9Lx,
DLT, HLU
802.11/
v.90
14.1-in.
SXGA+
with
*2
antenna
(continued)
ThinkPad T20, T21, T22 and T23 series 145
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Parts list
Model
CPU
Bay
Mini PCI LCD
HDD
device adapter
T23 (Memory: 128 MB)
(**): Memory 256 MB
2647-5Mx, 9Mx
Tual
1.2
CD-
RW
Modem
14.1-in. 48 GB
SXGA+
2647-5Nx, 9Nx,
HNx, NNx
802.11/
v.90
14.1-in.
SXGA+
with
*2
2647-5Fx, 9Fx,
DVD-
ROM
(8x)
antenna
*2
DFx
*2
*2
2647-5Dx, 9Dx
2647-5Hx, 9Hx
Modem
14.1-in.
SXGA+
DVD/
CD-
RW
*2
2647-5Jx, 9Jx
802.11/
v.90
14.1-in.
SXGA+
with
combo
antenna
*2
*2
2647-5Ux, 9Ux
Tual
1.2
DVD-
ROM
(8x)
Modem
14.1-in. 60 GB
SXGA+
2647-5Rx, 9Rx
(**)
DVD/
CD-
RW
combo
2647-5Sx, 9Sx,
HSx (**)
802.11/
v.90
14.1-in.
SXGA+
with
*2
antenna
v
v
CMG xxx: Mobile Intel® Pentium® III processor xxx GHz (MHz)
Tual xxx: Mobile Intel® Pentium® III processor xxx GHz
(MHz)-M
v
*1: no EDC feature, *2: featuring Secure chip
146 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Parts list
v
v
v
Each FRU is available for all types or models, unless
specific types or models are given.
The FRUs marked with asterisk are CRUs (customer
replaceable units.)
The FRUs marked with ꢀOPꢁ are also available as
optional FRUs.
No.
FRU
P/N
a - l
1
Keyboard bezel for T20
for all models except xxK
for models xxK
2
46P2615
46P2616
Keyboard bezel for T21 and T22
for all models except xxK
for models xxK
46P2613
46P2614
08K7066
04P3448
3
Fan assembly for T20
Fan assembly for T21
Fan assembly for T22
for 2647-3xx, 7xx, BxG
08K7268
26P9317
for 2648-all
for 2647-all except models 3xx, 7xx, BxG
4
5
PC Card slots
08K7064
26P8023
08K3373
27L0520
I/O card
I/O card with conformal coating
Microphone cable assembly
Base cover for T20
for 2647-all except models xxK, xxT
for 2647-xxK
6
7
08K6079
08K6350
08K6346
08K6369
08K6372
08K6370
for 2647-xxT
for 2648-all except models xxK, xxT
for 2648-xxK
for 2648-xxT
Base cover for T21
for 2647-all except models xxK
for 2647-xxK
26P9291
04P3446
04P3445
04P3447
for 2648-all except models xxK
for 2648-xxK
(continued)
148 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Parts list
P/N
No.
FRU
7
Base cover for T22
for 2647-3xx, 7xx, Bxx except models xxK 26P9291
for 2647-3xK, 7xK, BxK
26P9309
08K7362
for 2647-4xx, 5xx, 8xx, 9xx, Mxx, Lxx
except models xxK
for 2647-4xK, 5xK, 8xK, 9xK, MxK, LxK
for 2648-all except models xxK
for 2648-xxK
26P9174
26P9173
26P9175
08K9606*
08K9607*
27L3973*
8
Ultrabay 2000 diskette drive (TEAC)
Ultrabay 2000 diskette drive (SONY)
Ultrabay 2000 CD-ROM drive (TOSHIBA)
ꢀOPꢁ
Ultrabay 2000 CD-ROM drive (TEAC), low
27L3436*
power ꢀOPꢁ
Ultrabay 2000 CD-ROM drive (LG) ꢀOPꢁ
27L4141*
27L4301*
Ultrabay 2000 CD-ROM drive (LG), low
power ꢀOPꢁ
Ultrabay 2000 DVD drive 6x (MKE) ꢀOPꢁ
05K9188*
Ultrabay 2000 DVD drive 6x (TOSHIBA) ꢀOPꢁ 05K9160*
Ultrabay 2000 DVD drive 8x (MKE) ꢀOPꢁ
Ultrabay 2000 DVD drive 8x (HITACHI) ꢀOPꢁ
27L4241*
27L4236*
9
Cover, DIMM slot
08K6090*
10
Battery pack, Panasonic ꢀOPꢁ
for all models except xxE, xxJ
for models xxE, xxJ
02K6626*
02K6857*
Battery pack, SANYO ꢀOPꢁ
for all models except xxE, xxJ
for models xxE, xxJ
02K6627*
02K6859*
02K6572
08K6091*
08K6089
20L0264*
20L0265*
11
12
13
14
Backup battery
Cover, Mini PCI adapter slot
Speaker assembly
64-MB SDRAM SO DIMM (PC100) ꢀOPꢁ
128-MB SDRAM SO DIMM (PC100) ꢀOPꢁ
(continued)
ThinkPad T20, T21, T22 and T23 series 149
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Parts list
No.
FRU
P/N
15
Mini PCI modem card ꢀOPꢁ
for T20 (models x1x except T1U, x2x, x3x,
BxG)
08K3429*
Mini PCI modem card (Ambit)
08K4855*
08K3338*
08K4853*
08K3125*
for T20, T21 (models x1x, x2x, x3x, xxG)
Mini PCI modem card (Hoshi CR)
for T21 (models x7x except x7G)
Mini PCI modem card (Ambit), V.92 ready
for T22 (models xCx)
Mini PCI combo card (Intel) ꢀOPꢁ
for T20 (models x4x, x5x), T21 (models
xAJ, xAK)
Mini PCI combo card (3Com) ꢀOPꢁ
00N8117*
06P3829*
19K5888*
for T20 (models x6x), T21 (models xBx)
Mini PCI combo card (Intel) ꢀOPꢁ
for T21 (models xBx)
Mini PCI combo card (Intel CR) ꢀOPꢁ
for T21 (models xAx except xAJ, xAK)
Mini PCI combo card (Intel), V.92 ready ꢀOPꢁ 06P3809*
for T22 (models xEx, BxG, 6xx, PM5, T2x)
Mini PCI combo card (3Com) ꢀOPꢁ
22P6753*
10L1423*
for T22 (2647-4Gx, 8Gx, MxU)
Mini PCI Ethernet card ꢀOPꢁ
for T20 (2647-45G, 45U)
16
System board
for T20 (all models except 2647-5xx, 9xx, 12P3360
Lxx)
for T20 (2647-5xx, 9xx, Lxx)
12P3363
12P3366
for T21 (all models except 2647-5xx, 9xx
Cxx)
for T21 (2647-5xx, 9xx Cxx)
for T22 (2647-3xx, 7xx Bxx)
12P3369
26P8096
26P8098
for T22 (all models except 2647-3xx, 7xx
Bxx)
17
CPU, Pentium III 650 MHz
CPU, Pentium III 700 MHz
CPU, Pentium III 750 MHz
CPU, Pentium III 800 MHz
CPU, Pentium III 850 MHz
CPU, Pentium III 900 MHz
CPU, Pentium III 1 GHz
10L1405
10L1417
08K3191
08K3246
08K3248
08K3346
08K3392
(continued)
150 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Parts list
No.
18
FRU
P/N
19
Hard-disk drive (6.0 GB), STD ꢀOPꢁ
Hard-disk drive (6.0 GB), HITACHI ꢀOPꢁ
Hard-disk drive (10.0 GB), STD ꢀOPꢁ
Hard-disk drive (10.0 GB), HITACHI ꢀOPꢁ
Hard-disk drive (12.0 GB), STD ꢀOPꢁ
Hard-disk drive (12.0 GB), HITACHI ꢀOPꢁ
Hard-disk drive (20.0 GB), STD ꢀOPꢁ
Hard-disk drive (20.0 GB), HITACHI ꢀOPꢁ
Hard-disk drive (30.0 GB), STD ꢀOPꢁ
Hard-disk drive (32.0 GB), STD ꢀOPꢁ
05K9227*
05K9228*
08K9508*
08K9531*
05K9229*
05K9230*
27L4286*
08K9533*
08K9564*
08K9509*
20
Cover, hard-disk drive for T20
Cover, hard-disk drive for T21, T22
Pointing stick cap
08K6092*
04P3496*
21
22
23
24
—
—
—
—
—
84G6536*
26P9183
26P9178
Easy button cover for T22
Bracket, LCD FPC
Shield, Mini PCI
Blank cap for RJ45 (for T20)
Telephone cable (San Tai)
04P3975
27L0603
ThinkPad T20, T21, T22 and T23 series 151
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Parts list
Each FRU is available for all types or models, unless
specific types or models are given.
The FRUs marked with one asterisk are CRUs
(customer replaceable units.)
v
v
v
The FRUs marked with ꢀOPꢁ are also available as
optional FRUs.
No.
FRU
P/N
1
2
Keyboard bezel for T23 (all models except
xxK)
46P2611
for models xxK
46P2612
26P9166
26P9165
26P8006
27L0520
3
4
5
6
7
Fan assembly for T23
PC Card slots for T23
I/O card assembly for T23
Microphone cable assembly
Base cover for 2647 (T23)
for models except xJx, xFx, xLx, xNx, xSx, 26P9158
xxC, xxK, xxT
for models xDC, xKC, xMC, xPC, xUC,
2TC, xRC
26P9162
26P9160
46L4922
for models xHK, xKK, xMK, xPK, xRK,
2TK, 3TK, 7TK
for models xHT, xKT, xMT, xPT, xRT, 2TT
Base cover for 2647 wireless (T23)
for models xJx except xJK, xJT
for models xFx except xFC
46L4972
for models xLx except xLK, xLT
for models xNx except xNC, xNK, xNT
for models xSx except xSC, xSK, xST
for models xNC, xFC, xSC, x5TC, 9TC
for models xJK, xLK, xNK, xSK
for models xJT, xLT, xNT, xST
Base cover for 2648 (T23)
46L4934
26P9611
46L4923
for models except 4Nx, 8Nx, xxC, xxK,
xSx, xxT
26P9159
26P9163
26P9161
for models 4MC, 4PC, 8MC, 8PC, 2TC,
xRC
for models 4MK, 4PK, 8MK, 8PK, 2TK,
xRK
for models 4MT, 4PT, 8MT, 8PT, 2TT, xRT 46L4924
(continued)
ThinkPad T20, T21, T22 and T23 series 153
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Parts list
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
for models 4NK, 8NK, xSK
for models 4NT, 8NT, xST
46L4935
46L4933
46L4925
27L4301*
8
Ultrabay 2000 CD-ROM drive (LG), low
power ꢀOPꢁ
Ultrabay 2000 CD-ROM drive (TEAC), low
power ꢀOPꢁ
27L3436*
27L4241*
08K9648*
Ultrabay 2000 DVD-ROM drive 8x (MKE)
ꢀOPꢁ
Ultrabay 2000 DVD-ROM drive 8x (MKE),
light weight ꢀOPꢁ
Ultrabay 2000 DVD-ROM drive 8x (HITACHI) 27L4236*
ꢀOPꢁ
Ultrabay 2000 DVD-ROM drive 8x (HLDS),
08K9646*
light weight ꢀOPꢁ
Ultrabay 2000 DVD-ROM drive 8x (TOSHIBA) 27L4213*
ꢀOPꢁ
Ultrabay 2000 CD-RW drive (SONY) ꢀOPꢁ
Ultrabay 2000 CD-RW drive (TEAC) ꢀOPꢁ
27L4231*
27L4297*
27L4249*
Ultrabay 2000 DVD/CD-RW combo drive
(TOSHIBA) ꢀOPꢁ
Ultrabay 2000 DVD/CD-RW combo drive
27L4359*
(KME) ꢀOPꢁ
9
Cover, DIMM slot for T23
26P9421*
10
Battery pack, PANASONIC ꢀOPꢁ
for models xKx, xQx, L4x except xxE, xxJ 02K6626*
for models xKE, xKJ
02K6857*
Battery pack, SANYO ꢀOPꢁ
for models xKx, xQx, L4x except xxE, xxJ 02K6627*
for models xKE, xKJ
02K6859*
Battery pack, PANASONIC 2.0 Ah ꢀOPꢁ
for all models except xKx, xQx, L4x
for models xxE, xxJ except xKE, xKJ
Battery pack, SANYO 2.0 Ah ꢀOPꢁ
for all models except xKx, xQx, L4x
for models xxE, xxJ except xKE, xKJ
Backup battery
02K7026*
02K7030*
02K7028*
02K7032*
02K6572
11
(continued)
154 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Parts list
P/N
No.
12
FRU
Cover, Mini PCI adapter slot
Speaker assembly
08K7416*
08K6089
19K4653*
19K4655*
13
14
128-MB SDRAM SO DIMM (PC133) ꢀOPꢁ
256-MB SDRAM SO DIMM (PC133) ꢀOPꢁ
15
16
Mini PCI modem card (Ambit) ꢀOPꢁ
08K4853*
for all models except 2647-xFx, xJx, xLx,
xNx, xSx, 5TC, 9TC, and 2648-xNx, xSx
Mini PCI 802.11b/v.92 modem card
(ACTIONTEC)
12P3657
2647-xFx, xJx, xLx, xNx, xSx, 5TC, 9TC,
and 2648-xNx, xSx
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
12P3770
System board
2647-4Rx, 8Rx, BSx, 4Sx, 8Sx, DRx, DSx
2648-4Rx, 8Rx, 4Sx, 8Sx
17
CPU assembly, mobile Intel® Pentium® III
processor 866 MHz-M
26P7999
26P8122
26P8082
26P8005
CPU assembly, mobile Intel® Pentium® III
processor 1.0 GHz-M
CPU assembly, mobile Intel® Pentium® III
processor 1.13 GHz-M
CPU assembly, mobile Intel® Pentium® III
processor 1.2 GHz-M
18
19
Hard-disk drive (15.0 GB), HITACHI ꢀOPꢁ
Hard-disk drive (15.0 GB), STD ꢀOPꢁ
Hard-disk drive (20.0 GB), HITACHI ꢀOPꢁ
Hard-disk drive (20.0 GB), STD ꢀOPꢁ
Hard-disk drive (30.0 GB), HITACHI ꢀOPꢁ
Hard-disk drive (30.0 GB), STD ꢀOPꢁ
Hard-disk drive (40.0 GB), STD ꢀOPꢁ
Hard-disk drive (40.0 GB), HITACHI ꢀOPꢁ
Hard-disk drive (48.0 GB), STD ꢀOPꢁ
Hard-disk drive (60.0 GB), STD ꢀOPꢁ
Cover, hard-disk drive for T23
08K9587*
08K9585*
08K9533*
27L4286*
08K9592*
27L4291*
08K9683*
08K9767*
08K9599*
08K9700*
26P9543*
20
21
22
23
Pointing stick cap
84G6536*
26P9536
Easy button cover
(continued)
ThinkPad T20, T21, T22 and T23 series 155
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Parts list
No.
FRU
P/N
24
Ethernet daughter card (Ambit) ꢀOPꢁ
26P8181
for all models except 2647-xQx
25
Secure chip ꢀOPꢁ
26P8084
for 2647-5xx except 5Kx, 9xx except 9Kx
for 2647-HNx, xLx
—
—
—
Telephone cable (SAN TAI)
27L0603
AC adapters
FRU
P/N
AC adapter (72 W), 2-pin (ASTEC) ꢀOPꢁ
02K6753*
for models xxE, xxF, xxJ, xxP, xxS, xxU, xxX
AC adapter (72 W), 2-pin (DELTA) ꢀOPꢁ
02K6756*
02K6757*
02K6751*
for models xxE, xxF, xxJ, xxP, xxS, xxU, xxX
AC adapter (72 W), 2-pin (SANKEN)
for models xxE, xxF, xxJ, xxP, xxS, xxU, xxX
AC adapter (72 W), 3-pin (ASTEC) ꢀOPꢁ
for models xxA, xxB, xxC, xxG, xxH, xxK, xxM,
xxT, xxY
AC adapter (72 W), 3-pin (DELTA) ꢀOPꢁ
for models xxA, xxB, xxC, xxG, xxH, xxK, xxM,
xxT, xxY
02K6754*
156 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Parts list
LCD FRUs
1
2
7
6
5
4
3
4
5
Notes:
1. The parts marked with ꢁ are only for 13.3-in. LCD
cover kit.
2. 5 is for the models with 14.1-in. XGA TFT with antenna
and for the models with 14.1-in. SXGA+ TFT with
antenna.
3. 6 is 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
27L0562
05K9636
08K6087
—
2
3
4
5
6
7
LCD cable assembly 13.3
LCD panel, 13.3 XGA (LG)
Hinges
not available for this model
not available for this model
Inverter card
—
10L1402
ThinkPad T20, T21, T22 and T23 series 157
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Parts list
14.1-in. XGA TFT
No.
FRU
P/N
1
LCD cover kit (14.1-in.) XGA
for T20, T21 (except models xxK)
for T20, T21 (models xxK)
for T22, T23 (except models xxK)
for T22, T23 (models xxK)
LCD cover antenna kit (except models xxK)
models xxK
26P9566
26P9567
46L4843
46L4844
46L4910
46L4911
27L0519
2
3
LCD cable assembly 14.1 XGA for T20, T21
LCD cable assembly 14.1 XGA (CR) for T22, 27L0640
T23
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
05K9940
LCD panel, 14.1 XGA (HYUNDAI) for T20,
T21
LCD panel, 14.1 XGA (LG) X10 Light Weight 11P8241
LCD panel, 14.1 XGA (HITACHI) Light Weight 11P8258
for T22, T23
LCD panel, 14.1 XGA (SAMSUNG) Light
Weight for T22, T23
46L2292
LCD panel, 14.1 XGA (DBU) Light Weight for 05K9888
T22, T23
4
Hinges
08K6087
26P9196
26P9197
08K6353
Hinges for antenna
Antenna assembly
5
6
Thermal hinge (only for 2647-52x, 92x, C2x,
L1x)
7
Inverter card
10L1402
158 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Parts list
14.1-in. SXGA+ TFT
No.
FRU
P/N
1
LCD cover kit (14.1-in.) SXGA+ (except
models xxK)
26P9383
models xxK
26P9385
46L4910
46L4911
27L0590
46L2493
46L2495
08K6087
26P9196
26P9197
—
LCD cover antenna kit (except models xxK)
models xxK
2
3
LCD cable assembly 14.1 SXGA+
LCD panel, 14.1 SXGA+ (HITACHI)
LCD panel, 14.1 SXGA+ (LG)
Hinges
4
Hinges for antenna
5
6
7
Antenna assembly
not available for this model
Inverter card
10L1402
ThinkPad T20, T21, T22 and T23 series 159
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Parts list
Keyboard
Language
P/N (NMB)
P/N
(ALPS)
Arabic
02K5750*
02K5745*
02K5747*
02K5751*
02K5738*
02K5735*
02K5731*
02K5729*
02K5732*
02K5734*
02K5733*
02K5753*
02K5752*
02K5749*
02K5739*
02K5730*
02K5744*
02K5737*
02K5755*
02K5742*
02K5748*
02K5754*
02K5756*
02K5740*
02K5743*
02K5736*
02K5741*
02K5757*
02K5746*
—
Belgian
—
Chinese, traditional
Czech
02K5718*
—
Danish
—
Dutch
—
English, U.K.
English, U.S.
French, Canadian
French, European
German
—
—
—
—
—
Greek
—
Hungarian
Hebrew
—
—
Italian
—
Japanese
Korean
02K5701*
02K5715*
Norwegian
Polish
—
—
Portuguese
Russian
—
—
Slovak
—
Slovenian
Spanish, European
Spanish, Latin American
Swedish or Finnish
Swiss
—
—
—
—
—
Thai
02K5728*
—
Turkish
160 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Parts list
Recovery CDs
For Windows 98 (T22 series)
Language
Arabic
P/N
14P9515*
27P2112*
27P2110*
14P9516*
23P9240*
23P9247*
23P9236*
23P9235*
23P9246*
23P9237*
23P9241*
23P9242*
23P9266*
14P9517*
23P9267*
23P9245*
46P4398*
23P9248*
23P9264*
23P9239*
23P9268*
23P9270*
23P9269*
23P9243*
23P9238*
23P9244*
14P9519*
14P9518*
Chinese, Simplified
Chinese, Traditional
Czech
Danish
Dutch
English, U.K.
English, U.S.
Finnish
French, Canadian
French, European
German
Greek
Hebrew
Hungarian
Italian
Japanese
Norwegian
Polish
Portuguese
Russian
Slovak
Slovenian
Spanish, European
Spanish, Latin American
Swedish
Thai
Turkish
ThinkPad T20, T21, T22 and T23 series 161
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Parts list
For Windows 2000 (T22 series)
Language
Arabic
P/N
14P9525*
14P9526*
23P9218*
14P9527*
23P9219*
14P9528*
23P9220*
23P9222*
23P9221*
14P9529*
Czech
Greek
Hebrew
Hungarian
Polish
Russian
Slovak
Slovenian
Turkish
For Windows 2000/Windows NT (T22 series)
Language
P/N
Chinese, Simplified
Chinese, Traditional
Danish
27P2117*
27P2114*
23P9180*
23P9187*
23P9176*
23P9175*
23P9177*
23P9181*
23P9186*
23P9182*
23P9185*
27P1659*
23P9188*
23P9179*
23P9183*
23P9178*
23P9184*
Dutch
English, U.K.
English, U.S.
French, Canadian
French, European
Finnish
German
Italian
Japanese
Norwegian
Portuguese
Spanish, European
Spanish, Latin American
Swedish
162 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Parts list
For Windows 98 (T23 series)
Language
P/N
Arabic
14P9202*
14P9201*
46P4518*
46P4514*
46P6327*
14P9203*
14P9192*
14P9199*
14P9188*
32P5573*
14P9198*
14P9189*
14P9193*
14P9194*
32P5653*
14P9204*
14P9208*
14P9197*
46P4419*
14P9200*
14P9205*
14P9191*
14P9209*
14P9211*
14P9210*
14P9195*
14P9190*
14P9196*
14P9212*
14P9206*
Arabic (modem enabled)
Chinese, Simplified
Chinese, Traditional
Chinese, Traditional (Hong Kong S.A.R.)
Czech
Danish
Dutch
English, U.K.
English, U.S.
Finnish
French, Canadian
French, European
German
Greek
Hebrew
Hungarian
Italian
Japanese
Norwegian
Polish
Portuguese
Russian
Slovak
Slovenian
Spanish, European
Spanish, Latin American
Swedish
Thai
Turkish
ThinkPad T20, T21, T22 and T23 series 163
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Parts list
For Windows 2000 (T23 series)
Language
P/N
Arabic
32P6633*
46P4520*
46P4516*
46P6329*
32P6634*
32P6624*
32P6631*
32P6620*
32P6619*
32P6630*
32P6621*
32P6625*
32P6626*
32P6638*
32P6635*
32P6639*
32P6629*
32P6632*
32P6636*
32P6623*
32P6640*
32P6627*
32P6622*
32P6628*
32P6637*
Chinese, Simplified
Chinese, Traditional
Chinese, Traditional (Hong Kong S.A.R.)
Czech
Danish
Dutch
English, U.K.
English, U.S.
Finnish
French, Canadian
French, European
German
Greek
Hebrew
Hungarian
Italian
Norwegian
Polish
Portuguese
Russian
Spanish, European
Spanish, Latin American
Swedish
Turkish
164 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Parts list
For Windows 2000/Windows NT (T23 series)
Language
P/N
Danish
14P9291*
14P9298*
32P5645*
32P5576*
14P9288*
14P9292*
14P9297*
14P9293*
14P9296*
46P4421*
32P5742*
14P9290*
14P9294*
14P9289*
14P9295*
Dutch
English, U.K.
English, U.S.
French, Canadian
French, European
Finnish
German
Italian
Japanese
Norwegian
Portuguese
Spanish, European
Spanish, Latin American
Swedish
ThinkPad T20, T21, T22 and T23 series 165
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Parts list
For Windows XP (T23 series)
Language
P/N
Arabic
32P6736*
46L6288*
46L6287*
46P6362*
32P6737*
32P6727*
32P6734*
32P6723*
32P6722*
32P6733*
32P6724*
32P6728*
32P6729*
32P6741*
32P6738*
32P6742*
32P3732*
46P4457*
32P6735*
32P6739*
32P6726*
32P6743*
32P6730*
32P6725*
32P6731*
32P6740*
Chinese, Simplified
Chinese, Traditional
Chinese, Traditional (Hong Kong S.A.R.)
Czech
Danish
Dutch
English, U.K.
English, U.S.
Finnish
French, Canadian
French, European
German
Greek
Hebrew
Hungarian
Italian
Japanese
Norwegian
Polish
Portuguese
Russian
Spanish, European
Spanish, Latin American
Swedish
Turkish
166 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Parts list
Miscellaneous parts
Italicized letters in parentheses are reference to the
FRU
P/N
26P9654
Screw kit (including nylon-coated screws) for T20,
T21, T22 and T23 series:
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
M2.5 x 14 mm, bind head (15)
M2.5 x 11.5 mm, flat head (5)
M2.5 x 4.8 mm, flat head (20)
M2.5 x 3.5 mm, flat head (10)
M2.0 x 13.5 mm, pan head (15)
M2..0 x 4.0 mm, small head (10)
Hex stud D-sub (10)
Coin screw (1)
Security screw (1)
Blank cap, enhanced port (5)
Screw caps, rear (5)
Screw caps (5)
Screw caps (painted) (10)
Screw caps (not painted, thin) (10)
Screw caps (not painted) (5)
Base miscellaneous parts for T20, T21, T22 and T23 26P9285
series:
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
Cover, RF ID
Spring, battery lock
Lid, docking FR
Lid, docking RR
Spring, lid docking
Spring, lid PC card
Lid, PC card
ESD plate, audio
Insulator for base cover
Eject lever
Spring lever
Puller bay
Label danger, backup battery
Rubber foot, low height (2)
Rubber foot, high (1)
Sponge
Knob, battery lock
Latch, battery lock
Screw caps
Screw caps, rear
(continued)
ThinkPad T20, T21, T22 and T23 series 167
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Parts list
FRU
P/N
System miscellaneous parts for T20 series:
12P4226
v
v
v
v
v
v
v
v
v
v
v
(a) Hinge cover assembly
(23) Easy button cover
(i) I/O card spacer
(h) Cable RJ11 to system board docking
(j) Holder, backup battery
(g) Ultrabay 2000 guide rail
(l) Hard-disk bay guide rail
(b) Insulator, keyboard CRU
Mini PCI guide
Screw caps
Screw caps, rear
Note: 12P4226 does not contain c, d, e, f and k.
System miscellaneous parts for T21 series:
12P4227
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
(a) Hinge cover assembly
(23) Easy button cover
(i) I/O card spacer
(h) Cable RJ11 to system board docking
(j) Holder, backup battery
(g) Ultrabay 2000 guide rail
(l) Hard-disk bay guide rail
(b) Insulator, keyboard CRU
(c) ESD fan cover
(d) ESD plate spring CSB
(e) ESD bracket, FPC
(f) Keyboard support
(24) Bracket, LCD FRC
Mini PCI guide
Grease
Screw caps
Screw caps, rear
Note: 12P4227 does not contain k.
System miscellaneous parts for T22 series:
12P4228
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
(a) Hinge cover assembly
(23) Easy button cover
(i) I/O card spacer
(h) Cable RJ11 to system board docking
(j) Holder, backup battery
(g) Ultrabay 2000 guide rail
(l) Hard-disk bay guide rail
(b) Insulator, keyboard CRU
(c)ESD fan cover
(d) ESD plate spring CSB
(e) ESD bracket, FPC
(f) Keyboard support
(24) ESD bracket, LCD FPC
(k) Speaker RF bracket
Mini PCI guide
Grease
Screw caps
Screw caps, rear
(continued)
168 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Parts list
P/N
FRU
System miscellaneous parts for T23 series:
12P4229
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
(a) Hinge cover assembly
(23) Easy button cover T23
(g) I/O card spacer
(f) Cable RJ11 to system board docking
(h) Holder, backup battery
(e) Ultrabay 2000 guide rail
(j) Hard-disk bay guide rail
(b) Insulator, keyboard CRU
(k) ESD bracket, FPC
(d) ESD bracket, LCD FPC
(c) EMI finger PCMCIA
(i) Bracket EMI speaker
Mini PCI guide
Thermal grease
Screw caps
Screw caps, rear
I/O card miscellaneous parts for for T20, T21 and
T22 series:
08K6683
26P9789
08K7099
v
v
v
v
v
v
DC jack connector
Cable RJ11/45 to mini PCI
Insulator, modular jack
Insulation tape
Screw caps
Screw caps, rear
I/O card miscellaneous part for T23 series:
v
v
v
v
v
v
v
DC jack connector
Cable RJ11/45 to Mini PCI/EDC
Insulator, modular jack
Insulator for system board
Insulation tape
Screw caps
Screw caps, rear
System board miscellaneous parts for T20, T21 and
T22 series:
v
v
v
v
v
v
v
v
v
v
v
v
v
v
System board stud
Insulator, PC card
Insulator, battery latch
Keyboard connector guide
Shock rubber
Insulator, docking connector
Insulator, fan connector
Insulator, Ultrabay 2000 connector
Insulator, I/O connector
Shield, Mini PCI
Insulator, hard-disk drive
Thermal grease
Screw caps
Screw caps, rear
(continued)
ThinkPad T20, T21, T22 and T23 series 169
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Parts list
FRU
P/N
System board miscellaneous parts for T23 series:
26P9164
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
System board stud
System board stud (long)
System board stud (back)
Insulator, PC card
Insulator, battery latch
Keyboard connector guide
Shock rubber
Insulator, docking connector
Insulator, Ultrabay 2000 bay connector
Insulator, I/O connector
Insulator, hard-disk drive
Shield, Mini PCI
Insulator, guide rail
Thermal grease
Screw caps
Screw caps, rear
Optional FRUs
FRU
P/N
256-MB SDRAM SO DIMM (PC100)
64-MB SDRAM SO DIMM (PC133)
512-MB SDRAM SO DIMM (PC133)
Ultrabay 2000 diskette drive (TEAC)
Ultrabay 2000 diskette drive (SONY)
Ultrabay 2000 CD-ROM drive (24x) (LG)
Ultrabay 2000 CD-ROM drive (24x) (TOSHIBA)
Ultrabay 2000 DVD-ROM drive (6x) (MKE)
Ultrabay 2000 DVD-ROM drive (6x) (TOSHIBA)
Ultrabay 2000 DVD-ROM drive (8x) (MKE)
Ultrabay 2000 DVD-ROM drive (8x) (HITACHI)
Ultrabay Plus device carrier
33L3070*
19K4651*
19K4657*
08K9606*
08K9607*
27L4141*
27L3973*
05K9188*
05K9160*
27L4241*
27L4236*
26P9388*
19K2056*
26P9389*
Ultrabay Plus numeric keypad
Ultrabay Plus cradle for WorkPad c500 series
(continued)
170 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Parts list
P/N
FRU
Ultrabay 2000 SuperDisk drive (LS120)
Ultrabay 2000 SuperDisk drive (LS120 2x)
Ultrabay 2000 SuperDisk drive (LS240)
Ultrabay 2000 ZIP-250 drive
Ultrabay 2000 battery
05K9235*
27L3450*
08K9615*
00N8254*
02K6645*
08K6067*
05K9227*
05K9228*
08K9508*
05K9229*
05K9230*
27L4073*
27L4286*
08K9509*
08K9683*
08K9599*
08K9700*
08K9509*
02K6615*
02K6619*
02K6642*
02K6718*
02K6666*
02K6669*
08K6065*
08N1546*
05K6246*
08N1537*
08K7317*
12P4143*
08N1536*
27L0525*
08K6360*
27L0531*
05K2707*
Ultrabay 2000 2nd HDD adapter
Hard-disk drive (6.0 GB), STD
Hard-disk drive (6.0 GB), HITACHI
Hard-disk drive (10.0 GB), STD
Hard-disk drive (12.0 GB), STD
Hard-disk drive (12.0 GB), HITACHI
Hard-disk drive (18.0 GB), STD
Hard-disk drive (20.0 GB), STD
Hard-disk drive (32.0 GB), STD
Hard-disk drive (40.0 GB), STD
Hard-disk drive (48.0 GB), STD
Hard-disk drive (60.0 GB), STD
Mini PCI combo card (Intel)
Battery pack (Li-Ion) 9 cell, Panasonic
Battery pack (Li-Ion) 9 cell, SANYO
Multiple battery charger
Multiple battery charger (Ni-HM)
AC adapter (72 W), 3-pin (ASTEC)
AC adapter (72 W), 2-pin (ASTEC)
Asset ID RF adapter
ThinkPad Dock
PCI cover
ThinkPad Dock with extension plate
PCI cover with foot
Top cover and screw kit for ThinkPad Dock
ThinkPad Port Replicator
Diskette drive cable
Conversion adapter for diskette drive cable
Video cable
Telephone cable
ThinkPad T20, T21, T22 and T23 series 171
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Parts list
Common parts list
Tools
Triconnector wrap plug
PC test card
72X8546
35G4703
66G5180
05K2580
95F3598
05K4695
05K4694
27L8126
—
Audio wrap cable
USB parallel test cable
Screwdriver kit
Torque screwdriver
5 mm socket wrench
Screwdriver
ThinkPad hardware maintenance diskette version
1.62
Note: Download the file from the following Web site:
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.
Japan
13H5264*
13H5273*
36L8870*
Argentina
For 3-pin power cords:
Region
P/N
Australia, New Zealand
76H3514*
76H3516*
76H3530*
76H3520*
76H3524*
76H3518*
76H3522*
76H3532*
76H3535*
02K0539*
76H3528*
Taiwan, Thailand
Italy
Denmark
U.K., China (Hong Kong S.A.R.)
European countries
India, South Africa
Israel
Korea
China (P.R.C.) (other than Hong Kong S.A.R.)
Switzerland
172 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Parts list
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*
75H8988*
75H8989*
75H8992*
75H8990*
75H8993*
75H8999*
75H8998*
75H8996*
76H3536*
02K0540*
75H8997*
75H8994*
Australia, New Zealand
Canada, Thailand, U.S.
Denmark
European countries
India, South Africa
Israel
Italy
Japan
Korea
China (P.R.C.) (other than Hong Kong S.A.R)
Switzerland
U.K.
ThinkPad T20, T21, T22 and T23 series 173
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Notices
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
Other company, product, or service names may be the
trademarks or service marks of others.
174 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
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Notices
ThinkPad T20, T21, T22 and T23 series 175
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ꢀꢁꢂꢃ
Part Number: 62P9631
(1P) P/N: 62P9631
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