Lenovo 3000 N100 Owner's manual

Lenovo 3000 N100
Hardware Maintenance Manual
May 2006
This manual supports:
Lenovo 3000 N100
(MT 0689, 0690, 0768)

Lenovo 3000 N100
Hardware Maintenance Manual

Note
Before using this information and the product it supports, be sure to read the general information under “Notices” on page
94.
Second Edition (May 2006)
©Copyright Lenovo 2006. All rights reserved.
U.S. GOVERNMENT USERS –RESTRICTED RIGHTS: Our products and/or services are provided with
RESTRICTED RIGHTS. Use, duplication or disclosure by the Government is subject to the GSA ADP Schedule
contract with Lenovo Group Limited, if any, or the standard terms of this commercial license, or if the agency is
unable to accept this Program under these terms, then we provide this Program under the provisions set forth in
Commercial Computer Software–Restricted Rights at FAR 52.227-19, when applicable, or under Rights in
Data-General, FAR 52.227.14 (Alternate III).

Contents
Introduction .............1
About this manual ............1
Important service information ........1
Strategy for replacing FRUs .........1
Strategy for replacing ahard disk drive ....2
Important notice for replacing asystem board ..2
How to use error messages ........2
Strategy for replacing FRUs for Custom Model
Variant (CMV) products ..........2
Using PC Entitlement Warehouse (PEW) ....3
Using eSupport ............3
Using the HMM ............3
Important information about replacing RoHS
compliant FRUs .............4
Diskette compatibility matrix .........5
Safety notices: multilingual translations .....5
Safety information ............11
General safety ............11
Electrical safety ............11
Safety inspection guide .........13
Handling devices that are sensitive to
electrostatic discharge ..........14
Grounding requirements .........14
Laser compliance statement .........15
General descriptions.........17
Read this first .............17
What to do first ............17
Related service information .........19
Service Web site ............19
Restoring the pre-installed system ......19
Passwords ..............20
Power management ..........22
Checkout guide .............24
Testing the computer ..........24
Detecting system information with PC-Doctor ..26
Power system checkout .........26
Lenovo 3000 N100 ..........29
Product overview ............30
Specifications .............30
Status indicators ............32
FRU tests ..............33
Fn key combinations ..........34
Symptom-to-FRU index ..........35
Numeric error codes ..........35
Error messages ............37
Beep symptoms ............38
No-beep symptoms...........38
LCD-related symptoms .........39
Intermittent problems ..........40
Undetermined problems .........40
FRU replacement notices ..........41
Screw notices .............41
Retaining serial numbers .........41
Removing and replacing aFRU........44
1010 Battery pack ...........45
1020 Hard disk drive slot cover.......46
1030 Hard disk drive ..........46
1040 PCI Express Mini Card for wireless LAN..47
1050 DIMM slot cover ..........48
1060 DIMM .............48
1070 Optical drive ...........49
1080 Thermal module slot cover and fan ...50
1090 Thermal module ..........51
1100 CPU ..............53
1110 Cover, strip (E cover) ........54
1120 Keyboard ............55
1130 Function board ..........57
1140 LCD unit ............58
1150 Top cover assembly (C cover) with speakers
and Bluetooth daughter card (BDC) .....61
1160 USB/Audio connector card ......66
1170 VGA connector card .........67
1180 System board, MDC, PC Card slot, and
bottom cover assembly (D cover) ......68
2010 LCD front bezel (B cover) .......71
2020 Inverter card ...........72
2030 LCD panel, LCD cable, and hinges ....73
2040 Camera and LCD rear cover assembly (A
cover) ...............75
Locations ...............76
Front view..............76
Rear view ..............77
Bottom view .............77
Parts list ...............78
Overall ...............78
LCD FRUs..............84
Keyboard ..............87
Recovery CDs ............88
Corel software CDs ...........90
AC adapters .............90
Miscellaneous parts...........91
Optional FRU ............92
Common parts list ...........92
Notices ................94
Trademarks ..............95
©Copyright Lenovo 2006 iii

iv MT 0689, 0690, 0768

Introduction
About this manual
This manual contains service and reference information for Lenovo 3000 N100 (MT
0689, 0690, 0768). Use this manual along with the advanced diagnostic tests to
troubleshoot problems.
The manual is divided into sections as follows:
vThe common sections provide general information, guidelines, and safety
information required in servicing computers.
vThe product-specific section includes service, reference, and product-specific
parts information.
Important
This manual is intended for trained service personnel who are familiar with
Lenovo 3000 products. Use this manual along with the advanced diagnostic
tests to troubleshoot problems effectively.
Before servicing aLenovo 3000 product, be sure to review the safety
information under “Safety notices: multilingual translations” on page 5,
“Safety information” on page 11, and “Laser compliance statement” on page
15.
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/support
Advise customers to contact the Customer Support Center at 800-426-7378 if
they need assistance in obtaining or installing any software fixes, drivers, and
BIOS downloads.
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 software fixes, drivers, and BIOS downloads are installed
before replacing any FRUs listed in this manual.
Use the following strategy to prevent unnecessary expense for replacing and
servicing FRUs:
©Copyright Lenovo 2006 1

vIf you are instructed to replace aFRU but the replacement does not correct the
problem, reinstall the original FRU before you continue.
vSome computers have both aprocessor board and asystem board. If you are
instructed to replace either the processor board or the system board, and
replacing one of them does not correct the problem, reinstall that board, and
then replace the other one.
vIf an adapter or adevice 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 ahard disk drive
Always try to run alow-level format before replacing ahard 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.
Important notice for replacing asystem board
Some components mounted on asystem board are very sensitive. Improper
handling of asystem board can cause damage to those components, and may
cause asystem malfunction.
Attention: When handling asystem board:
vDo not drop asystem board or apply any excessive force to it.
vAvoid rough handling of any kind.
vAvoid bending asystem board and hard pushing to prevent cracking at each
BGA (Ball Grid Array) chipset.
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 Custom Model Variant (CMV) products
Custom Model Variant (CMV) is aunique configuration that has been negotiated
between Lenovo and the customer. Aunique 4-digit MT and 3-digit model is
provided to the customer to place orders (Example: 1829-W15). ACMV is aspecial
bid offering. Therefore, it is NOT generally announced.
There are three information resources to identify which FRUs are used to support
CMV products. These sources are PC Entitlement Warehouse (PEW), eSupport, and
the HMM.
Important service information
2MT 0689, 0690, 0768

Using PC Entitlement Warehouse (PEW)
vPEW is the primary source for identifying FRU part numbers and FRU
descriptions for the key commodities for CMV products at aMT -serial number
level. An example of key commodities are hard disk drives, system boards,
microprocessors, Liquid Crystal Displays (LCDs), and memory.
vRemember, All CMV products are loaded in PEW under the 4-digit MT and
3-digit model, where model =“fixed part number”.
vPEW can be accessed at the following Web site:
http://w3-3.ibm.com/pc/entitle
Customers can also access PEW via
http://www-307.ibm.com/pc/support/site.wss/product.do?template=/
warranty/warranty.vm&sitestyle=lenovo
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.
vBusiness 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.
vAuthorized 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)
veSupport can be used to view the list of key commodities built in aparticular
machine serial (this is the same record found in PEW).
veSupport can be accessed at the following Web site:
http://www.lenovo.com/support
vTo view the key commodities, click on PARTS INFORMATION, then PARTS
LOOKUP. Type in the model type and serial number. The key commodities will
be returned in the eSupport record under PARTS SHIPPED WITH YOUR
SYSTEM.
For the Remaining FRUs (the complete list of FRUs at the MT Model level)
veSupport can be used to view the complete list of FRUs for amachine type and
model.
vTo 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 PARTS 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 aback-up to PEW and eSupport to view the complete list of
FRUs at the MT Model level. CMVs are custom models and are not found in the
HMM.
Important service information
Introduction 3

Important information about replacing RoHS compliant FRUs
RoHS, The Restriction of Hazardous Substances in Electrical and Electronic
Equipment Directive (2002/95/EC) is aEuropean 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.
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: Adirect substitution is apart with adifferent FRU part number that is
automatically shipped by the distribution center at the time of the order.
Important service information
4MT 0689, 0690, 0768

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 apage 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.
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 éstata effettuata la sostituzione di una FRU,
accertarsi che tutte le viti, le molle etutte le altri parti di piccole dimensioni siano nella
corretta posizione enon siano sparse all’interno dell’elaboratore. Verificare ciò scuotendo
l’elaboratore eprestando attenzione ad eventuali rumori; eventuali parti opezzetti
metallici possono provocare cortocircuiti pericolosi.
Antes de encender el sistema despues de sustituir una FRU, compruebe que todos los
tornillos, muelles ydemás piezas pequeñas se encuentran en su sitio yno se encuentran
sueltas dentro del sistema. Compruébelo agitando el sistema yescuchando los posibles
ruidos que provocarían. Las piezas metálicas pueden causar cortocircuitos eléctricos.
Diskette compatibility matrix
Introduction 5

Safety notice 2
DANGER
Some standby batteries contain asmall amount of nickel and cadmium. Do not
disassemble astandby 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 àl’eau. Ne les mettez pas en
court-circuit. Pour les mettre au rebut, conformez-vous àla réglementation en vigueur.
Lorsque vous remplacez la pile de sauvegarde ou celle de l’horloge temps réel, veillez
àn’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.
Alcune batterie di riserva contengono una piccola quantità di nichel ecadmio. Non
smontarle, ricaricarle, gettarle nel fuoco onell’acqua né cortocircuitarle. Smaltirle
secondo la normativa in vigore (DPR 915/82, successive disposizioni edisposizioni
locali). Quando si sostituisce la batteria dell’RTC (real time clock) ola batteria di
supporto, utilizzare soltanto itipi inseriti nell’appropriato Catalogo parti. L’impiego di
una batteria non adatta potrebbe determinare l’incendio ol’esplosione della batteria
stessa.
Algunas baterías de reserva contienen una pequeña cantidad de níquel ycadmio. No
las desmonte, ni recargue, ni las eche al fuego oal 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 oexplosión de la misma.
Safety notices
6MT 0689, 0690, 0768

Safety notice 3
DANGER
The battery pack contains small amounts of nickel. Do not disassemble it, throw it
into fire or water, or short-circuit it. Dispose of the battery pack as required by local
ordinances or regulations. Use only the battery in the appropriate parts listing when
replacing the battery pack. Use of an incorrect battery can result in ignition or
explosion of the battery.
La batterie contient du nickel. Ne la démontez pas, ne l’exposez ni au feu ni àl’eau.
Ne la mettez pas en court-circuit. Pour la mettre au rebut, conformez-vous àla
réglementation en vigueur. Lorsque vous remplacez la batterie, veillez àn’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 edisposizioni locali). Quando si sostituisce la batteria,
utilizzare soltanto itipi inseriti nell’appropriato Catalogo parti. L’impiego di una
batteria non adatta potrebbe determinare l’incendio ol’esplosione della batteria stessa.
Las baterías contienen pequeñas cantidades de níquel. No las desmonte, ni recargue,
ni las eche al fuego oal 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 oexplosión de la misma.
Safety notices
Introduction 7

Safety notice 4
DANGER
The lithium battery can cause afire, an explosion, or asevere 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 àune temperature supérieure à100°C,
ne la faites pas brûler et n’en exposez pas le contenu àl’eau. Mettez la pile au rebut
conformément àla réglementation en vigueur. Une pile inappropriée risque de
prendre feu ou d’exploser.
Die Systembatterie ist eine Lithiumbatterie. Sie kann sich entzünden, explodieren
oder schwere Verbrennungen hervorrufen. Batterien dieses Typs dürfen nicht
aufgeladen, zerlegt, über 100 Cerhitzt 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 euna batteria al litio epuo incendiarsi, esplodere oprocurare
gravi ustioni. Evitare di ricaricarla, smontarne il connettore polarizzato, smontarla,
riscaldarla ad una temperatura superiore ai 100 gradi centigradi, incendiarla ogettarla
in acqua. Smaltirla secondo la normativa in vigore (DPR 915/82, successive
disposizioni edisposizioni locali). L’impiego di una batteria non adatta potrebbe
determinare l’incendio ol’esplosione della batteria stessa.
La batería de repuesto es una batería de litio ypuede provocar incendios, explosiones
oquemaduras 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
8MT 0689, 0690, 0768

Safety notice 5
Safety notice 6
DANGER
If the LCD breaks and the fluid from inside the LCD gets into your eyes or on your
hands, immediately wash the affected areas with water for at least 15 minutes. Seek
medical care if any symptoms from the fluid are present after washing.
Si le panneau d’affichage àcristaux liquides se brise et que vous recevez dans les yeux
ou sur les mains une partie du fluide, rincez-les abondamment pendant au moins quinze
minutes. Consultez un médecin si des symptômes persistent après le lavage.
Die Leuchtstoffröhre im LCD-Bildschirm enthält Quecksilber. Bei der Entsorgung die
örtlichen Bestimmungen für Sondermüll beachten. Der LCD-Bildschirm besteht aus Glas
und kann zerbrechen, wenn er unsachgemäß behandelt wird oder der Computer auf den
Boden fällt. Wenn der Bildschirm beschädigt ist und die darin befindliche Flüssigkeit in
Kontakt mit Haut und Augen gerät, sollten die betroffenen Stellen mindestens 15
Minuten mit Wasser abgespült und bei Beschwerden anschließend ein Arzt aufgesucht
werden.
Nel caso che caso l’LCD si dovesse rompere ed il liquido in esso contenuto entrasse in
contatto con gli occhi ole mani, lavare immediatamente le parti interessate con acqua
corrente per almeno 15 minuti; poi consultare un medico se isintomi dovessero
permanere.
Si la LCD se rompe yel fluido de su interior entra en contacto con sus ojos osus 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.
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 9

Safety notice 7
DANGER
Safety notice 8
DANGER
Though the main batteries have low voltage, ashorted or grounded battery can
produce enough current to burn personnel or combustible materials.
Bien que le voltage des batteries principales soit peu élevé, le court-circuit ou la mise
àla masse d’une batterie peut produire suffisamment de courant pour brûler des
matériaux combustibles ou causer des brûlures corporelles graves.
Obwohl Hauptbatterien eine niedrige Spannung haben, können sie doch bei
Kurzschluß oder Erdung genug Strom abgeben, um brennbare Materialien zu
entzünden oder Verletzungen bei Personen hervorzurufen.
Sebbene le batterie di alimentazione siano abasso voltaggio, una batteria in corto
circuito oamassa 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 atierra puede producir la corriente suficiente como para quemar material
combustible oprovocar quemaduras en el personal.
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 icavi di alimentazione, rimuovere la batteria epoi scollegare icavi di
interconnessione.
Antes de quitar una FRU, apague el sistema, desenchufe todos los cables de las tomas
de corriente eléctrica, quite la batería y, acontinuación, desconecte cualquier cable de
conexión entre dispositivos.
Safety notices
10 MT 0689, 0690, 0768

Safety information
The following section presents safety information with which you need to be
familiar before you service aLenovo 3000 computer.
General safety
Follow these rules to ensure general safety:
vObserve good housekeeping in the area of the machines during and after
maintenance.
vWhen lifting any heavy object:
1. Make sure that you can stand safely without slipping.
2. Distribute the weight of the object equally between your feet.
3. Use aslow 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.
vBefore you start the machine, make sure that other service representatives and
the customer’s personnel are not in ahazardous position.
vPlace removed covers and other parts in asafe place, away from all personnel,
while you are servicing the machine.
vKeep your toolcase away from walk areas so that other people will not trip over
it.
vDo not wear loose clothing that can be trapped in the moving parts of a
machine. Make sure that your sleeves are fastened or rolled up above your
elbows. If your hair is long, fasten it.
vInsert the ends of your necktie or scarf inside clothing or fasten it with a
nonconductive clip, about 8centimeters (3 inches) from the end.
vDo not wear jewelry, chains, metal-frame eyeglasses, or metal fasteners for your
clothing.
Attention: Metal objects are good electrical conductors.
vWear safety glasses when you are hammering, drilling, soldering, cutting wire,
attaching springs, using solvents, or working in any other conditions that might
be hazardous to your eyes.
vAfter service, reinstall all safety shields, guards, labels, and ground wires.
Replace any safety device that is worn or defective.
vReinstall all covers correctly before returning the machine to the customer.
vFan louvers on the machine help to prevent overheating of internal components.
Do not obstruct fan louvers or cover them with labels or stickers.
Electrical safety
Observe the following rules when working on electrical equipment.
Safety information
Introduction 11

Important
Use only approved tools and test equipment. Some hand tools have handles
covered with asoft material that does not insulate you when working with
live electrical currents.
Many customers have, near their equipment, rubber floor mats that contain
small conductive fibers to decrease electrostatic discharges. Do not use this
type of mat to protect yourself from electrical shock.
vFind the room emergency power-off (EPO) switch, disconnecting switch, or
electrical outlet. If an electrical accident occurs, you can then operate the switch
or unplug the power cord quickly.
vDo not work alone under hazardous conditions or near equipment that has
hazardous voltages.
vDisconnect all power before:
–Performing amechanical 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.
vIf you need to work on amachine 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 acomplete
circuit. By observing the above rule, you may prevent acurrent 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.
vRegularly inspect and maintain your electrical hand tools for safe operational
condition.
vDo not use worn or broken tools and testers.
vNever assume that power has been disconnected from acircuit. First, check that it
has been powered off.
vAlways look carefully for possible hazards in your work area. Examples of these
hazards are moist floors, nongrounded power extension cables, power surges,
and missing safety grounds.
vDo not touch live electrical circuits with the reflective surface of aplastic dental
mirror. The surface is conductive; such touching can cause personal injury and
machine damage.
Safety information
12 MT 0689, 0690, 0768

vDo not service the following parts with the power on when they are removed
from their normal operating places in amachine:
–Power supply units
–Pumps
–Blowers and fans
–Motor generators
and similar units. (This practice ensures correct grounding of the units.)
vIf an electrical accident occurs:
–Use caution; do not become avictim 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-Lenovo 3000 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:
vElectrical hazards, especially primary power (primary voltage on the frame can
cause serious or fatal electrical shock)
vExplosive hazards, such as adamaged CRT face or abulging capacitor
vMechanical hazards, such as loose or missing hardware
To determine whether there are any potentially unsafe conditions, use the
following checklist at the beginning of every service task. Begin the checks with
the power off, and the power cord disconnected.
Checklist:
1. Check exterior covers for damage (loose, broken, or sharp edges).
2. Power off the computer. Disconnect the power cord.
3. Check the power cord for:
a. Athird-wire ground connector in good condition. Use ameter 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-Lenovo 3000 alterations. Use good judgment as to
the safety of any non-Lenovo 3000 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.
Safety information
Introduction 13

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 adifference 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:
vKeep the parts in protective packages until they are inserted into the product.
vAvoid contact with other people.
vWear agrounded wrist strap against your skin to eliminate static on your body.
vPrevent the part from touching your clothing. Most clothing is insulative and
retains acharge even when you are wearing awrist strap.
vUse the black side of agrounded work mat to provide astatic-free work surface.
The mat is especially useful when handling ESD-sensitive devices.
vSelect agrounding system, such as those listed below, to provide protection that
meets the specific service requirement.
Note
The use of agrounding 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 adouble-insulated or battery-operated system, use an ESD
common ground or reference point. You can use coax or connector-outside
shells on these systems.
–Use the round ground prong of the ac plug on ac-operated computers.
Grounding requirements
Electrical grounding of the computer is required for operator safety and correct
system function. Proper grounding of the electrical outlet can be verified by a
certified electrician.
Safety information
14 MT 0689, 0690, 0768