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IBM Mobile Systems
ThinkPad Computer 
Hardware Maintenance Manual 
  
November 2004
This manual supports:
ThinkPad  R50/R50p, R51 series
(MT 1829, 1830, 1831, 1832, 1833,
1836, 1840, 1841, 2883, 2887, 2888,
2889, 2894, 2895)
ThinkPad  Dock II (MT 2877)
 
                                                                                                                                                                                                                                                 
                    
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                          Note  Before using this information and the product it  supports, be sure to read the general information  under “Notices” on page 272. Second Edition (November 2004)  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
                    
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                          Contents  About this manual  . . . . . . . . . . .1  Introduction  . . . . . . . . . . . . .3  Important service information . . . . . . . . .3  Strategy for replacing FRUs  . . . . . . . .3  How to use error messages  . . . . . . . .4  Diskette compatibility matrix  . . . . . . . . .4  Safety notices: multilingual translations  . . . . . .4  Safety information . . . . . . . . . . . .16  General safety . . . . . . . . . . . .16  Electrical safety  . . . . . . . . . . .17  Safety inspection gui
                    
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                           1030 Hard disk drive  . . . . . . . . . .70  1040 DIMM (optional)  . . . . . . . . .72  1050 Keyboard  . . . . . . . . . . .73  1060 DIMM (standard)  . . . . . . . . .77  1070 Modem daughter card (MDC/MDC-2)  . . .78  1080 Bluetooth/Modem daughter card  (BMDC/BMDC-2)  . . . . . . . . . .80  1090 Keyboard bezel . . . . . . . . . .82  1100 Mini PCI adapter  . . . . . . . . .86  1110 Fan assembly  . . . . . . . . . .90  1120 CPU  . . . . . . . . . . . . .91  1130 Backup battery  . . . . . . . . 
                    
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                            About this manual  This manual contains service and reference information for  IBM ThinkPad R50/R50p and R51 series (MT1829, 1830,  1831, 1832, 1833, 1836, 1840, 1841, 2883, 2887, 2888,  2889, 2894, 2895), and ThinkPad Dock II (MT2877)  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  com
                    
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                        2 R50/R50p, R51 Series                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
                    
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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  http://www.ibm.com/pc/support  Advise customers to contact the IBM Support  Center at 800-426-7378 (800-IBM-Serv) if they need  assistance in obtaining or installing any diskette  fixes.  Customers in Canada should call IBM Support  Center at 800-565-3344 for assistance or download  information.  Strategy for replaci
                    
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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.
                    
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                         Safety notices 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  
                    
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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
                    
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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  b
                    
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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 
                    
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                         Safety notices (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 baterí
                    
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                        Safety notices  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 sauve
                    
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                         Safety notices (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’i
                    
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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  sym
                    
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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 
                    
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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 s
                    
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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 Stromkab
                    
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                        Safety information  Safety information  The following section presents safety information with  which you need to be familiar before you service 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.   Make sure that you can stand safely without  slipping.  2.   Distribute the weight of the object equally between  your feet.  3.   Use a