CAUTION:
Neverremovethecoveronapowersupplyoranypartthathasthefollowinglabelattached.
Hazardousvoltage,current,andenergylevelsarepresentinsideanycomponentthathasthislabel
attached.Therearenoserviceablepartsinsidethesecomponents.Ifyoususpectaproblemwith
oneoftheseparts,contactaservicetechnician.
Toreplacethepowersupplyassembly,dothefollowing:
1.Removeallmediafromthedrivesandturnoffallattacheddevicesandthecomputer.Then,disconnect
allpowercordsfromelectricaloutletsanddisconnectallcablesthatareconnectedtothecomputer.
2.Removethecomputercover.See“Removingthecomput ercover”onpage14.
3.Removethefrontbezel.See“Removingandreinstallingthefrontbezel”onpage14.
4.Pivotthedrivebayassemblyupward,removethetwoscrewsthatsecuretheheatsinkfanduct,and
thenlifttheheatsinkfanductoutofthechassis.
Figure23.Removingtheheatsinkfanduct
5.Disconnectthepowersupplyassemblycablesfromalldrivesandfromthe24-pinpowerconnectorand
4-pinpowerconnectoronthesystemboard.See“Locatingpartsonthesystemboard”onpage9.
Note:Youmightalsoneedtoreleasethepowersupplyassemblycablesfromsomecableclipsorties
thatsecurethecablestothechassis.Makesurethatyounotethecableroutingbeforedisconnecting
thecables.
6.Attherearofthecomputer,removethethreescrewsthatsecurethepowersupplyassembly.P ressthe
powersupplyclip1downwardtoreleasethepowersupplyassemblyandthenslidethepowersupply
assemblytothefrontofthecomputer.Liftthepowersupplyassemblyoutofthecomputer.
28ThinkCentreUserGuide