4.Laythecomputeronitssideandremovethefourscrewsattherearofthechassisthatsecurethe
powersupplyassembly.
Figure35.Removingthescrewsforthepowersupplyassembly
5.Slidethepowersupplyassemblytothefrontofthecomputerandthenliftitoutofthechassis.
6.Ensurethatthenewpowersupplyassemblyisthecorrectreplacement.Somepowersupplyassemblies
automaticallysensethevoltage,somepowersupplyassembliesarevoltagespecific,andsome
powersupplyassemblieshaveavoltage-selectionswitch.Ifyourpowersupplyassemblyhasa
voltage-selectionswitch,makesurethatyousetthevoltage-selectionswitchtomatchthevoltage
availableatyourelectricaloutlet.Ifnecessary,useaballpointpentoslidethevoltage-selectionswitch
tothecorrectposition.
•Ifthevoltagesupplyrangeinyourlocalcountryorregionis100–127Vac,setthevoltage-selection
switchto115V.
•Ifthevoltagesupplyrangeinyourlocalcountryorregionis200–240Vac,setthevoltage-selection
switchto230V.
7.Installthenewpowersupplyassemblyintothechassissothatthescrewholesinthepowersupply
assemblyalignwiththoseinthechassis.
8.Installandtightenthefourscrewstosecurethepowersupplyassembly.
Note:UseonlyscrewsprovidedbyLenovo.
9.Reconnectthepowersupplyassemblycablestothesystemboardandeachofthedrives.
10.Securethepowersupplyassemblycableswiththecableclipsandtiesinthechassis.
Whattodonext:
•Toworkwithanotherpieceofhardware,gototheappropriatesection.
•Tocompletetheinstallationorreplacement,goto“Completingthepartsreplacement”onpage121.
Replacingtheheatsinkandfanassembly
Attention:Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstanding“Important
safetyinformation”onpage1.
Thissectionprovidesinstructionsonhowtoreplacetheheatsinkandfanassembly.
Chapter9.ReplacingFRUs(machinetypes:10ASand10AU)101
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