Figure15.Removingthescrewsthatsecurethepowersupplyassembly
4.Removetheoldpowersupplyassemblyfromthechassis.
5.Ensurethatthepowersupplyassemblyisthecorrectreplacement.Somepowersupplyassemblies
automaticallysensethevoltage,somepowersupplyassembliesar evoltagespecic,andsomepower
supplyassemblieshaveavoltage-selectionswitch.Ifyourcomputerhasavoltage-selectionswitch,
ensurethatyousetthevoltage-selectionswitchofthenewpowersupplyassemblytomatchthe
voltageavailableatyourelectricaloutlet.Ifnecessary,useaballpointpentoslidethevoltage-selection
switcht oadifferentposition.
•Ifthevoltagesupplyrangeinyourlocalcountryorregionis100-127Vac,setthevoltage-selection
switchto115V.
•Ifthevoltagesupplyrangeinyourlocalcountryorregionis200-240Vac,setthevoltage-selection
switchto230V.
6.Installthenewpowersupplyassemblyintothechassissothatthescrewholesinthepowersupply
assemblyalignwiththoseinthechassis.
7.Installthefourscrewstosecurethepowersupplyassembly.
Note:UseonlyscrewsprovidedbyLenovo.
8.Reconnectthepowersupplyassemblyconnectorst othesyst emboard.
9.Reconnectapowersupplyassemblyconnect ortoeachofthedrives.
10.Goto“CompletingtheFRUreplacement”onpage97.
Replacingtheheatsinkandfanassembly
Attention
Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe“Importantsafetyinformation”
intheThinkCentreSafetyandWarrantyGuidethatcamewithyourcomputer.ToobtainacopyoftheThinkCentre
SafetyandWarrantyGuide,goto:
http://www.lenovo.com/support
Thissectionprovidesinstructionsonhowtoreplacetheheatsinkandfanassembly.
78ThinkCentreHardwareMaintenanceManual