Lenovo ThinkStation P300 Bedienungsanleitung Seite 111

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Seitenansicht 110
2.Removethecomputercover.See“Removingthecomputercover”onpage74.
3.Laythecomputeronitssideforeasieraccesstothesystemboard.
4.Locatetheheatsinkandfanassembly.See“Locatingpartsonthesystemboard”onpage6.
5.Disconnecttheheatsinkandfanassemblycablefromthemicroprocessorfanconnectoronthesystem
board.See“Locatingpartsonthesystemboard”onpage6.
6.Followthissequencetoremovethefourscrewsthatsecuretheheatsinkandfanassemblytothe
systemboard:
a.Partiallyremovescrew1,thenfullyremovescrew2,andthenfullyremovescrew1.
b.Partiallyremovescrew3,thenfullyremovescrew4,andthenfullyremovescrew3.
Note:Carefullyremovethefourscrewsfromthesystemboardtoavoidanypossibledamagetothe
systemboard.Thefourscrewscannotberemovedfromtheheatsinkandfanassembly.
Figure48.Screwsthatsecuretheheatsinkandfanassembly
7.Liftthefailingheatsinkandfanassemblyoffthesystemboard.
Notes:
Youmighthavetogentlytwisttheheatsinkandfanassemblytofreeitfromthemicroprocessor.
Donottouchthethermalgreasewhilehandlingtheheatsinkandfanassembly.
8.Pivotthetwoplasticretainingclipsthatsecuretheheatsinkfanductoutward.Thenremovetheheat
sinkfanductfromthefailingheatsinkandfanassembly.
Chapter9.Installingorreplacinghardware99
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