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IBM Thinkpad A20mp A21mp A22mp Manual

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    							IBM Mobile Systems
    ThinkPad Computer
    Hardware Maintenance Manual
    October 2001
    This manual supports: ThinkPad A20m, A21m, A22m (MT 2628/2633)
    A20p, A21p, A22p (MT 2629)
    ThinkPad Dock (MT 2631)
                
    						
    							NoteBefore using this information and the product it
    supports, be sure to read the general information
    under “Notices” on page 150.
    Second Edition (October 2001)
    The following paragraph does not apply to the United
    Kingdom or any country where such provisions are
    inconsistent with local law:
    INTERNATIONAL BUSINESS MACHINES CORPORATION
    PROVIDES THIS PUBLICATION “AS IS” WITHOUT ANY
    WARRANTY OF ANY KIND, EITHER EXPRESS OR
    IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
    LIMITED WARRANTIES OF MERCHANTABILITY OR
    FITNESS FOR A PARTICULAR PURPOSE. Some states
    do not allow disclaimer or express or implied warranties in
    certain transactions; therefore, this statement may not
    apply to you.
    This publication could include technical inaccuracies or
    typographical errors. Changes are periodically made to the
    information herein; these changes will be incorporated in
    new editions of the publication. IBM may make
    improvements or changes to the products or the programs
    described in this publication at any time.
    It is possible that this publication may contain references
    to, or information about, IBM products (machines and
    programs), programming, or services that are not
    announced in your country. Such references or information
    must not be construed to mean that IBM intends to
    announce such IBM products, programming, or services in
    your country.
    Requests for technical information about IBM products
    should be made to your IBM authorized dealer or your IBM
    marketing representative.
    © Copyright International Business Machines
    Corporation 2001. All rights reserved.
    US Government Users Restricted Rights – Use, duplication
    or disclosure restricted by GSA ADP Schedule Contract
    with IBM Corp.  
    						
    							About this manual
    This manual contains service and reference information for
    IBM ThinkPad A20, A21, A22 (MT2628, 2629, 2633), and
    ThinkPad Dock (MT2631) products. Use this manual along
    with the advanced diagnostic tests to troubleshoot
    problems.
    The manual is divided into sections as follows:
    vThe common sections provide general information,
    guidelines, and safety information required in servicing
    computers.
    vThe product-specific section includes service, reference,
    and product-specific parts information.
    ImportantThis manual is intended for trained service
    personnel who are familiar with ThinkPad products.
    Use this manual along with the advanced diagnostic
    tests to troubleshoot problems effectively.
    Before servicing an IBM ThinkPad product, be sure
    to review the safety information under“Safety
    notices: multilingual translations”on page 3,“Safety
    information”on page 14, and“Laser compliance
    statement”on page 18.
    © Copyright IBM Corp. 2001iii  
    						
    							ivThinkPad A20m/p, A21m/p, A22m/p 
    						
    							Contents
    About this manual...........iii
    Introduction.............1
    Important service information.........1
    Strategy for replacing FRUs........1
    How to use error messages........2
    Diskette compatibility matrix.........2
    Safety notices: multilingual translations......3
    Safety information............14
    General safety............14
    Electrical safety...........15
    Safety inspection guide.........16
    Handling electrostatic discharge-sensitive devices 17
    Grounding requirements.........18
    Laser compliance statement.........18
    General descriptions..........23
    Read this first.............23
    What to do first...........23
    Related service information.........25
    Service web site...........25
    Product recovery program........25
    Passwords.............27
    Power management..........30
    Checkout guide............33
    Testing the computer..........33
    Detecting system information with PC-Doctor . . . 35
    Power system checkout.........35
    ThinkPad A20m/p, A21m/p and A22m/p.....39
    Product overview............41
    Specifications............41
    Status indicators...........44
    FRU tests.............46
    Fn key combinations..........48
    Symptom-to-FRU index..........49
    Numeric error codes..........49
    Error messages...........52
    Beep symptoms...........53
    No beep symptoms..........53
    LCD-related symptoms.........54
    Intermittent problems..........55
    Undetermined problems.........55
    FRU replacement notices.........56
    Screw notices............56
    Retaining serial numbers.........57
    Removing and replacing a FRU........59
    1010 Battery pack...........60
    1020 DIMM............61
    1030 Mini PCI adapter.........63
    © Copyright IBM Corp. 2001
    v  
    						
    							1040 Backup battery..........66
    1050 Hard-disk drive or RF ID adapter....67
    1060 Ultrabay 2000 device........69
    1070 Keyboard...........71
    1080 Keyboard CRU insulator.......74
    1090 Hinge cover and clear sheet icon....75
    1100 Keyboard bezel and speaker......76
    1110 Microphone and speaker cable.....78
    1120 Sub card............80
    1130 PC Card slot assembly.......82
    1140 Fan assembly..........83
    1150 Diskette drive..........85
    1160 Upper shield...........87
    1170 TV card............88
    1180 CPU socket and CPU........89
    1190 System board and RJ45/11 connector
    assembly............91
    Thermal rubbers location.........93
    2010 LCD assembly..........94
    2020 Front bezel...........96
    2030 Inverter card..........99
    2040 LCD panel...........101
    3010 ThinkPad Dock PCI cover......105
    3020 ThinkPad Dock top cover......107
    Locations..............112
    Front view.............112
    Rear view.............113
    Bottom view............114
    Parts list..............115
    A series model matrix.........115
    Overall.............123
    AC adapter............136
    LCD FRUs............136
    Keyboard.............140
    Recovery CDs...........141
    Miscellaneous parts..........145
    Optional FRUs...........147
    Common parts list..........148
    Notices..............150
    Trademarks............150
    viThinkPad A20m/p, A21m/p, A22m/p 
    						
    							Introduction
    Important service information
    ImportantBIOS and device driver fixes are
    customer-installable. The BIOS and device drivers
    are posted on the IBM support site
    http://www.ibm.com/pc/support
    Advise customers to contact the PC Company
    HelpCenter at 800-772-2227 if they need assistance
    in obtaining or installing any diskette fixes.
    Customers in Canada should call IBM HelpPC at
    800-565-3344 for assistance or download
    information.
    Strategy for replacing FRUs
    Before replacing partsMake sure that all diskette fixes are installed before
    replacing any FRUs listed in this manual.
    Use the following strategy to prevent unnecessary FRU
    replacement and service expense:
    vIf you are instructed to replace a FRU but the
    replacement does not correct the problem, reinstall
    the original FRU before you continue.
    vSome computers have both a processor board and a
    system board. If you are instructed to replace either the
    processor board or the system board, and replacing one
    of them does not correct the problem, reinstall that
    board, and then replace the other one.
    vIf an adapter or device consists of more than one FRU,
    any of the FRUs may be the cause of the error. Before
    replacing the adapter or device, remove the FRUs, one
    by one, to see if the symptoms change. Replace only
    the FRU that changed the symptoms.
    Attention:The setup configuration on the computer you
    are servicing may have been customized. Running
    Automatic Configuration may alter the settings. Note the
    current configuration settings (using the View Configuration
    option); then, when service has been completed, verify that
    those settings remain in effect.
    © Copyright IBM Corp. 2001
    1   
    						
    							Strategy for replacing a hard-disk driveAlways 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
    driveDiskette
    capacityCompatibility
    3.5-inch 1.0 MB Read and write
    2.0 MB Read and write
    4.0 MB Not compatibleImportant service information
    2ThinkPad A20m/p, A21m/p, A22m/p 
    						
    							Safety notices: multilingual translations
    In this manual, safety notices appear in English with a
    page number reference to the appropriate multi-lingual,
    translated safety notice found in this section.
    The following safety notices are provided in English,
    French, German, Italian, and Spanish languages.
    Safety notice 1
    Before the computer is powered-on after FRU
    replacement, make sure all screws, springs, and other
    small parts are in place and are not left loose inside
    the computer. Verify this by shaking the computer and
    listening for rattling sounds. Metallic parts or metal
    flakes can cause electrical shorts.
    Avant de remettre l’ordinateur sous tension après
    remplacement d’une unitéen clientèle, vérifiez que
    tous les ressorts, vis et autres pièces sont bien en
    place et bien fixées. Pour ce faire, secouez l’unitéet
    assurez-vous qu’aucun bruit suspect ne se produit. Des
    pièces métalliques ou des copeaux de métal pourraient
    causer un court-circuit.
    Bevor nach einem FRU-Austausch der Computer
    wieder angeschlossen wird, mußsichergestellt werden,
    daßkeine Schrauben, Federn oder andere Kleinteile
    fehlen oder im Gehäuse vergessen wurden. Der
    Computer mußgeschüttelt und auf Klappergeräusche
    geprüft werden. Metallteile oder-splitter können
    Kurzschlüsse erzeugen.
    Prima di accendere l’elaboratore dopo cheéstata
    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
    Introduction3 
    						
    							Safety notice 2
    DANGER
    Some standby batteries contain a small amount of
    nickel and cadmium. Do not disassemble a standby
    battery, recharge it, throw it into fire or water, or
    short-circuit it. Dispose of the battery as required
    by local ordinances or regulations. Use only the
    battery in the appropriate parts listing. Use of an
    incorrect battery can result in ignition or explosion
    of the battery.
    Certaines batteries de secours contiennent du
    nickel et du cadmium. Ne les démontez pas, ne les
    rechargez pas, ne les exposez ni au feu ni à l’eau.
    Ne les mettez pas en court-circuit. Pour les mettre
    au rebut, conformez-vous à la réglementation en
    vigueur. Lorsque vous remplacez la pile de
    sauvegarde ou celle de l’horloge temps réel, veillez
    à n’utiliser que les modèles cités dans la liste de
    pièces détachées adéquate. Une batterie ou une
    pile inappropriée risque de prendre feu ou
    d’exploser.
    Die Bereitschaftsbatterie, die sich unter dem
    Diskettenlaufwerk befindet, kann geringe Mengen
    Nickel und Cadmium enthalten. Sie darf nur durch
    die Verkaufsstelle oder den IBM Kundendienst
    ausgetauscht werden. Sie darf nicht zerlegt,
    wiederaufgeladen, kurzgeschlossen, oder Feuer
    oder Wasser ausgesetzt werden. Die Batterie kann
    schwere Verbrennungen oder Verätzungen
    verursachen. Bei der Entsorgung die örtlichen
    Bestimmungen für Sondermüll beachten. Beim
    Ersetzen der Bereitschafts-oder Systembatterie nur
    Batterien des Typs verwenden, der in der
    Ersatzteilliste aufgeführt ist. Der Einsatz falscher
    Batterien kann zu Entzündung oder Explosion
    führen.
    (continued)
    Safety notices
    4ThinkPad A20m/p, A21m/p, A22m/p 
    						
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