Personal Computer User Manual

Replacingthepowersupplyassembly
Attention:
Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe“Importantsafetyinformation”
intheThinkCentreSafetyandWarrantyGuidethatcamewithyourcomputer.ToobtainacopyoftheThinkCentre
SafetyandWarrantyGuide,goto:
http://www.lenovo.com/support
Thissectionprovidesinstructionsonhowtoreplacethepowersupplyassembly.
Toreplacethepowersupplyassembly,dothefollowing:
1.Turnoffthecomputeranddisconnectallpowercordsfromelectricaloutlets.
2.Removethecomputercover.See“Removingthecomputercover”onpage14.
3.Disconnectthepowersupplyassemblycablesfromthesystemboardandalldrives.See“Locating
partsonthesystemboard”onpage10.
4.Releasethepowersupplyassemblycablesfromthecableclipsandtiesinthechassis.
5.Laythecomputeronitssideandremovethefourscrewsattherearofthechassisthatsecurethe
powersupplyassembly.
Figure20.Removingthescrewsforthepowersupplyassembly
6.Slidethepowersupplyassemblytothefrontofthecomputerandthenliftitoutofthechassis.
7.Ensurethatthenewpowersupplyassemblyisthecorrectreplacement.Ifyournewpowersupply
assemblyhasavoltage-selectionswitch,ensurethatyousetthevoltage-selectionswitchtomatchthe
voltageavailableatyourelectricaloutlet.Ifnecessary,useaballpointpentoslidethevoltage-selection
switchtoadifferentposition.
•Ifthevoltagesupplyrangeinyourlocalcountryorregionis100–127Vac,settheswitchto115V.
•Ifthevoltagesupplyrangeinyourlocalcountryorregionis200–240Vac,settheswitchto230V.
8.Installthenewpowersupplyassemblyintothechassissothatthescrewholesinthepowersupply
assemblyalignwiththoseinthechassis.
9.Installandtightenthefourscrewstosecurethepowersupplyassembly.
24ThinkCentreUserGuide