Ibm THINKPAD R50P, THINKPAD R50 Manual

ThinkPad Computer

Hardware

Maintenance Manual

August 2005

This manual supports:

ThinkPad R50e Series

ThinkPad Dock II (MT 2877)

(MT 1834, 1842, 2670)

ThinkPad R52 Series

(MT 1846, 1847, 1848, 1849, 1850,

1858, 1859, 1860, 1861, 1862,

1863, 1870)

ThinkPad R51e Series

(MT 1843, 1844, 1845)

Note

Before using this information and the product it

supports, be sure to read the general information

under “Notices” on page 263.

First Edition (August 2005)

Portions © Copyright International Business Machines

Corporation 2005.

U.S. GOVERNMENT USERS – RESTRICTED RIGHTS:

Our products and/or services are provided with

RESTRICTED RIGHTS. Use, duplication or disclosure by

the Government is subject to the GSA ADP Schedule

contract with Lenovo Group Limited, if any, or the standard

terms of this commercial license, or if the agency is unable

to accept this Program under these terms, then we provide

this Program under the provisions set forth in Commercial

Computer Software–Restricted Rights at FAR 52.227-19,

when applicable, or under Rights in Data-General, FAR

52.227.14 (Alternate III).

About this manual

This manual contains service and reference information for

ThinkPad

®

R50e series (MT 1834, 1842, 2670), R51e

series (MT 1843, 1844, 1845), R52 series (MT 1846, 1847,

1848, 1850, 1858, 1859, 1860, 1861, 1862, 1863, 1870),

and ThinkPad Dock II (MT2877) products. Use this manual

along with the advanced diagnostic tests to troubleshoot

problems.

Note

MT 1850, 1862, 1863, and 1870 are special bids.

For information on how to locate service parts, refer

to “Strategy for replacing FRUs for CTO, CMV, and

GAV” on page 4.

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 a ThinkPad product, be sure to

review the safety information under “Safety notices:

multilingual translations” on page 8, “Safety

information” on page 20, and “Laser compliance

statement” on page 26.

2 R50e, R51e and R52 Series

Introduction

Important service information

Important

BIOS and device driver fixes are

customer-installable. The BIOS and device drivers

are posted on the customer support site

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

Advise customers to contact the Customer Support

Center at 800-426-7378 if they need assistance in

obtaining or installing any diskette fixes.

Customers in Canada should call the Customer

Support Center 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 a device consists of more than one

FRU, any of the FRUs may be the cause of the error.

Before replacing the adapter or device, remove the

FRUs, one by one, to see if the symptoms change.

Replace only the FRU that changed the symptoms.

Attention: The setup configuration on the computer you

are servicing may have been customized. Running

Automatic Configuration may alter the settings. Note the

current configuration settings (using the View Configuration

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

those settings remain in effect.

Strategy for replacing a hard disk drive

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

disk drive.

Attention: The drive startup sequence in the computer

you are servicing may have been changed. Be extremely

careful during write operations such as copying, saving, or

formatting. If you select an incorrect drive, data or

programs can be overwritten.

How to use error messages

Use the error codes displayed on the screen to diagnose

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

diagnosis with the first error code. Whatever causes the

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

error code is displayed, see whether the error symptom is

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

are servicing.

Strategy for replacing FRUs for CTO,

CMV, and GAV

Product definition

Dynamic Configure To Order (CTO)

This provides the ability for a customer to configure an

IBM

®

solution from an eSite, and have this configuration

sent to fulfillment, where it is built and shipped directly to

the customer. The machine label, PC Entitlement

Warehouse (PEW), eSupport, and the HMM will load these

products as the 4-digit MT and 3-digit model, where model

= “CTO” (Example: 1829-CTO).

Custom Model Variant (CMV)

This is a unique configuration that has been negotiated

between IBM and the customer. A unique 4-digit MT and

3-digit model is provided to the customer to place orders

(Example: 1829-W15). A CMV is a special bid offering.

Therefore, it is NOT generally announced.

v The MTM portion of the machine label is the 4-digit MT

and 3-digit model, where model = “CTO” (Example:

1829-CTO). The PRODUCT ID portion of the machine

label is the 4-digit MT and 3-digit CMV model (Example:

1829-W15).

v The PEW record is the 4-digit MT and 3-digit model,

where model = “CTO” (Example: 1829-CTO).

v eSupport will show both the CTO and CMV machine

type models (Example: 1829-CTO and 1829-W15 will be

found on the eSupport site.)

Important service information

4 R50e, R51e and R52 Series

v The HMM will have the 4-digit MT and 3-digit CTO

model only (Example: 1829-CTO). Again, CMVs are

custom models and are not found in the HMM.

General Announce Variant (GAV)

This

is a standard model (fixed configuration). GAVs are

announced and offered to all customers. The MTM portion

of the machine label is a 4-digit MT and 3-digit model,

where model = a “fixed part number”, not “CTO” (Example:

1829-F1U). Also, PEW, eSupport, and the HMM will list

these products under the same fixed model number.

FRU identification for CTO, CMV, and

GAV products

There are three information resources to identify which

FRUs are used to support CTO, CMV, and GAV products.

These sources are PEW, eSupport, and the HMM.

Using PEW

v PEW is the primary source for identifying FRU part

numbers and FRU descriptions for the key commodities

for CTO, CMV and GAV products at a MT - serial

number level. An example of key commodities are hard

disk drives, system boards, microprocessors, Liquid

Crystal Displays (LCDs), and memory.

v Remember, All CTO and CMV products are loaded in

PEW under the 4-digit MT and 3-digit model, where

model = “CTO” (Example: 1829-CTO). GAVs are loaded

in PEW under the 4-digit MT and 3-digit model, where

model = a “fixed part number”, not “CTO” (Example:

1829-F1U).

v PEW can be accessed at the following Web site:

http://w3-3.ibm.com/pc/entitle

Click on MACHINE LOOKUP, followed by WARRANTY

INFORMATION. Input the MT and the Serial number

and the list of key commodities will be returned in the

PEW record under COMPONENT INFORMATION.

v Business Partners using Eclaim will access PEW when

performing Entitlement Lookup. Business Partners will

enter Loc ID, MT and Serial, and the key commodities

will be returned in the Eclaim record under SYSTEM

DETAILS.

v Authorized IBM Business Partners can access Eclaim at

the following Web site: https://wca.eclaim.com

Using eSupport

For Key Commodities (Examples - hard disk drive,

system board, microprocessor, LCD, and memory)

Important service information

Introduction 5

v eSupport can be used to view the list of key

commodities built in a particular machine serial (this is

the same record found in PEW).

v eSupport can be accessed at the following Web site:

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

v To view the key commodities, click on PART S

INFORMATION, then PA RT S LOOKUP. Type in the

model type and serial number. The key commodities will

be returned in the eSupport record under PA RTS

SHIPPED WITH YOUR SYSTEM.

For the Remaining FRUs (the complete list of FRUs at

the MT Model level)

v eSupport can be used to view the complete list of FRUs

for a machine type and model.

v To view the complete list of FRUs, type in the machine

type and model (Example: 1829-CTO) under QUICK

PATH. Under “View by Document Type” select PA RTS

INFORMATION. Under “Filter by Category” select

SERVICE PARTS. Under “Parts Information by Date”

select SYSTEM SERVICE PARTS. The list of service

parts by description, with applicable machine type model

and FRU will be displayed.

Using the HMM

Use the HMM as a back-up to PEW and eSupport to view

the complete list of FRUs at the MT Model level.

Important service information

6 R50e, R51e and R52 Series

Important information about replacing

RoHS compliant FRUs

RoHS, The Restriction of Hazardous Substances in

Electrical and Electronic Equipment Directive

(2002/95/EC) is a European Union legal requirement

affecting the global electronics industry. RoHS

requirements must be implemented on Lenovo

products placed on the market after June 2006.

Products on the market before June 2006 are not

required to have RoHS compliant parts. So, if the

original FRU parts are non compliant, replacement

parts can also be non compliant. In all cases if the

original FRU parts are RoHS compliant the

replacement part must also be RoHS compliant.

Lenovo plans to transition to RoHS compliance well before

the implementation date and expects its suppliers to be

ready to support Lenovo's requirements and schedule.

Products sold in 2005, will contain some RoHS compliant

FRUs. The following statement pertains to these products

and any product Lenovo produces containing RoHS

compliant FRUs.

RoHS compliant FRUs have unique FRU part numbers.

Before or after the RoHS implementation date, failed RoHS

compliant parts must always be replaced using RoHS

compliant FRUs, so only the FRUs identified as compliant

in the system HMM or direct substitutions for those FRUs

may be used.

Important service information

Introduction 7

Products marketed before

June 2006

Products marketed after June

2006

Current or

original part

Replacement

FRU

Current or

original part

Replacement

FRU

Non-RoHS Can be

Non-RoHS

Must be RoHS Must be RoHS

Non-RoHS Can be RoHS

Non-RoHS Can sub to

RoHS

RoHS Must be RoHS

Note: A direct substitution is a part with a different FRU

part number that is automatically shipped by the

distribution center at the time of the order.

Related web URLs are:

v IBM Information for Suppliers website:

http://www-03.ibm.com/procurement/proweb.nsf/

ContentDocsByTitle/United+States~Information+for

+suppliers

v RoHS Directive:

http://europa.eu.int/eur-lex/pri/en/oj/dat/2003/

l_037/l_03720030213en00190023.pdf

v California Senate Bills 20, 50:

http://www.ciwmb.ca.gov/HHW/Events/AnnualConf/

2004/Presentation/MPaparian.pdf

Diskette compatibility matrix

The compatibility of each of the drives with the diskettes

for it is as follows:

Diskette

drive

Diskette

capacity

Compatibility

3.5-inch 1.0 MB Read and write

2.0 MB Read and write

4.0 MB Not compatible

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, Hebrew, Italian, and Spanish.

Important service information

8 R50e, R51e and R52 Series

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.

Safety notices

Introduction 9

Safety notice 2

DANGER

Some standby batteries contain a small amount of

nickel and cadmium. Do not disassemble a standby

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

short-circuit it. Dispose of the battery as required

by local ordinances or regulations. Use only the

battery in the appropriate parts listing. Use of an

incorrect battery can result in ignition or explosion

of the battery.

Certaines batteries de secours contiennent du

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

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

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

au rebut, conformez-vous à la réglementation en

vigueur. Lorsque vous remplacez la pile de

sauvegarde ou celle de l’horloge temps réel, veillez

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

pièces détachées adéquate. Une batterie ou une

pile inappropriée risque de prendre feu ou

d’exploser.

Die Bereitschaftsbatterie, die sich unter dem

Diskettenlaufwerk befindet, kann geringe Mengen

Nickel und Cadmium enthalten. Sie darf nur durch

die Verkaufsstelle oder den IBM Kundendienst

ausgetauscht werden. Sie darf nicht zerlegt,

wiederaufgeladen, kurzgeschlossen, oder Feuer

oder Wasser ausgesetzt werden. Die Batterie kann

schwere Verbrennungen oder Verätzungen

verursachen. Bei der Entsorgung die örtlichen

Bestimmungen für Sondermüll beachten. Beim

Ersetzen der Bereitschafts-oder Systembatterie nur

Batterien des Typs verwenden, der in der

Ersatzteilliste aufgeführt ist. Der Einsatz falscher

Batterien kann zu Entzündung oder Explosion

führen.

(continued)

Safety notices

10 R50e, R51e and R52 Series

(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.

Safety notices

Introduction 11

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.

(continued)

Safety notices

12 R50e, R51e and R52 Series

(continuation of safety notice 3)

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.

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 notices

Introduction 13

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.

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.

(continued)

Safety notices

14 R50e, R51e and R52 Series

(continuation of safety notice 4)

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.

Safety notices

Introduction 15

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.

Safety notices

16 R50e, R51e and R52 Series

Safety notice 6

DANGER

To avoid shock, do not remove the plastic cover

that protects the lower part of the inverter card.

Afin d’éviter tout risque de choc électrique, ne

retirez pas le cache en plastique protégeant la

partie inférieure de la carte d’alimentation.

Aus Sicherheitsgründen die Kunststoffabdeckung,

die den unteren Teil der Spannungswandlerplatine

umgibt, nicht entfernen.

Per evitare scosse elettriche, non rimuovere la

copertura in plastica che avvolge la parte inferiore

della scheda invertitore.

Para evitar descargas, no quite la cubierta de

plástico que rodea la parte baja de la tarjeta

invertida.

Safety notices

Introduction 17

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.

Safety notices

18 R50e, R51e and R52 Series

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.

Safety notices

Introduction 19

Safety information

The following section presents safety information with

which you need to be familiar before you service a

ThinkPad 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. Make sure that 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 that

you think is too heavy for you.

v Do not perform any action that causes hazards to the

customer, or that makes the equipment unsafe.

v Before you start the machine, make sure 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 Keep your toolcase away from walk areas so that other

people will not trip over it.

v 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 Insert the ends of your necktie or scarf inside clothing or

fasten it with a nonconductive clip, about 8 centimeters

(3 inches) from the end.

v 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.

Safety information

20 R50e, R51e and R52 Series

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.

v Fan louvers on the machine help to prevent overheating

of internal components. Do not obstruct fan louvers or

cover them with labels or stickers.

WARNING

Handling the cord on this product or cords

associated with accessories sold with this product

will expose you to lead, a chemical known to the

State of California to cause cancer, and birth defects

or other reproductive harm. Wash hands after

handling.

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 Do not work alone under hazardous conditions or near

equipment that has hazardous voltages.

v Disconnect all power before:

– Performing a mechanical inspection

– Working near power supplies

– Removing or installing main units

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.

v If you need to work on a machine that has exposed

electrical circuits, observe the following precautions:

Safety information

Introduction 21

– 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.

– 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; Instructions for these

precautions 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 Do not use worn or broken tools and testers.

v Never assume that power has been disconnected from

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

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.

v 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.

v 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 information

22 R50e, R51e and R52 Series

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-ThinkPad features or options not

covered by this inspection guide.

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 Explosive hazards, such as a damaged CRT face or a

bulging capacitor

v 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 the 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-ThinkPad alterations. Use

good judgment as to the safety of any non-ThinkPad

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.

Safety information

Introduction 23

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

or rivets) have not been removed or tampered with.

Handling devices that are sensitive to

electrostatic 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

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 Avoid contact with other people.

v Wear a grounded wrist strap against your skin to

eliminate static on your body.

v Prevent the part from touching your clothing. Most

clothing is insulative and retains a charge even when

you are wearing a wrist strap.

v 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.

v 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 to guard against

ESD damage is desirable but not necessary.

– Attach the ESD ground clip to any frame ground,

ground braid, or green-wire ground.

– When working on a double-insulated or

battery-operated system, use an ESD common

ground or reference point. You can use coax or

connector-outside shells on these systems.

Safety information

24 R50e, R51e and R52 Series

Ibm THINKPAD R50P, THINKPAD R50 Manual

Contents

About this manual

Introduction

Important service information

Strategy for replacing FRUs

Strategy for replacing a hard disk drive

How to use error messages

Product definition

Using PEW

Using eSupport

Using the HMM

Diskette compatibility matrix

Safety notices: multilingual translations

Safety information

General safety

Electrical safety

Safety inspection guide