ThinkPad T420s - Chapter 10. Parts List

Chapter10.Partslist
Thischaptercontainsfollowinglistsoftheserviceparts.
•“Overall”onpage118
•“LCDFRUs”onpage128
•“Keyboard”onpage132
•“Miscellaneousparts”onpage133
•“acpoweradapter”onpage134
•“Powercords”onpage134
•“Recoverydiscs”onpage135
•“Commonservicetools”onpage142
Notes:
•EachFRUisavailableforalltypesormodels,unlessspecifictypesormodelsarespecified.
•FRUwithspecificmodelslistedanddescribedasxxU(whereUisanexampleofacountrydesignator)shouldbe
usedforallmodelsendinginU.
•FRUwithspecificmodelslistedanddescribedas3Dx(where3Disanexampleofauniqueconfiguration)shouldbe
usedforallofthesemodels,unlessspecificcountryorregiondesignatorisspecified.
•ACRU(customerreplaceableunit)isidentifiedbyasingleasterisk(*)ortwoasterisks(**)intheCRUIDcolumn.An
NintheCRUIDcolumnmeansthatthepartisnotaCRU.Asingleasterisk(*)meansthatthepartisaSelf-service
CRU;twoasterisks(**)meansthatthepartisanOptional-serviceCRU.
ExternalCRUstatementtocustomers:
Someproblemswithyourproductcanberesolvedwithareplacementpartyoucaninstallyourself,called
a“CustomerReplaceableUnit”or“CRU.”SomeCRUsaredesignatedasSelf-serviceCRUsandothersare
designatedasOptional-serviceCRUs.InstallationofSelf-serviceCRUsisyourresponsibility;youmayrequest
thatLenovoinstallsanOptional-serviceCRUaccordingtothewarrantyserviceforyourproduct.Whereyouare
installingtheCRU,LenovowillshiptheCRUtoyou.CRUinformationandreplacementinstructionsareshipped
withyourproductandareavailablefromLenovoatanytimeuponrequest.Y oumayfindalistofCRUsinthe
publicationsthatshipwithyourproductorathttp://www.lenovo.com/CRUs.Youmayberequiredtoreturnthe
defectivepartthatisreplacedbytheCRU.Whenreturnisrequired:(1)returninstructions,aprepaidshippinglabel,
andacontainerwillbeincludedwiththereplacementCRU;and(2)youmaybechargedforthereplacementCRUif
Lenovodoesnotreceivethedefectivepartwithinthirty(30)daysofyourreceiptofthereplacementCRU.Seeyour
LenovoLimitedWarrantydocumentationforfulldetails.
ThinkPadcomputerscontainthefollowingtypesofCRUs:
–Self-serviceCRUs:TheseCRUsunplugorareheldbynomorethantwoscrews.Examplesofthesetypes
ofCRUsincludetheacpoweradapter,powercord,battery,andharddiskdrive.OtherSelf-serviceCRUs
dependingonproductdesignmayincludethememorymodule,wirelesscard,keyboard,andpalmrestwith
fingerprintreaderandtouchpad.
–Optional-serviceCRUs:TheseCRUsareisolatedpartswithinthecomputerthatareconcealedbyanaccess
panelthatistypicallysecuredbymorethantwoscrews.Oncetheaccesspanelisremoved,thespecific
CRUisvisible.
•FRUsmarkedwith
OPareavailableasoptions.
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