Note:Droppingasystemboardfromaheightofaslittleas6inchessothatitfallsatonahardbench
cansubjecttheaccelerometertoasmuchas6,000G'sofshock.
•Becarefulnottodropthesystemboardonabenchtopthathasahardsurface,suchasmetal,wood,or
composite.
•Ifasystemboar disdropped,youmusttestit,usingPC-DoctorforDOS,tomakesurethattheHDD
ActiveProtectionSystem™stillfunctions.
Note:IfthetestshowsthattheHDDActiveP rotectionSystemisnotfunctioning,besuretodocumentthe
dropinar ejectreport,andreplacethesystemboard.
•Avoidroughhandlingofanykind.
•Ateverypointintheprocess,besurenottodroporstackthesystemboard.
•Ifyouputasystemboarddown,besuretoputitonlyonapaddedsurfacesuchasanESDmatora
corrugatedconductivesurface.
Afterreplacingthesystemboard,runPC-DoctorforDOStomakesurethattheHDDActivePr otection
Systemstillfunctions.Theprocedureisasfollows:
1.Placethecomputeronahorizontalsurface.
2.RunDiagnostics➙ThinkPadDevices➙HDDActiveProtectionTest.
Attention:Donotapplyphysicalshocktothecomputerwhilethetestisrunning.
Foraccess,removetheseFRUsinorder:
•“1010Digitizerpen”onpage61
•“1020Batterypack”onpage61
•“1050Hingecaps”onpage66
•“1060Keyboard”onpage67
•“1070Palmrest”onpage70
•“1090PCIExpressMiniCardforwirelessLAN/WiMAX”onpage74
•“1100PCIExpressMiniCardforwirelessWAN”onpage76
•“1110Bluetoothdaughtercard(BDC-2.1)”onpage78
•“1120Keyboardbezel”onpage79
•“1130LCDassembly”onpage82
•“1140DC-inconnector ,basecover,fan,digitizerpencase,andpenswitchassembly”onpage85
Table23.RemovalstepsofsystemboardandExpressCardslotassembly
Thefollowingcomponentssolderedonthesystemboardareextremelysensitive.Whenyouservicethesystem
board,avoidanykindofroughhandling.
aPlatformControllerHub(PCH)
bCPU
cAccelerometerchipfortheHDDActiveProtectionSystem
90ThinkPadX220TabletandX220iTabletHardwareMaintenanceManual