Lenovo x3250 m6 - Page 165

Step3.Usethecleaningpadtowipethethermalgreasefromthebottomoftheheatsink.
Note:Makesurethatallofthethermalgreaseisremoved.
Step4.Useacleanareaofthecleaningpadtowipethethermalgreasefromthemicroprocessor.Then,
disposeofthecleaningpadafterallofthethermalgreaseisremoved.
Step5.Usethethermal-greasesyringetoplacenineuniformlyspaceddots1of0.02mLeachonthe
topofthemicroprocessororonthebottomoftheheatsink.Theoutermostdotsmustbewithin
approximately5mmoftheedgeofthemicroprocessor.Thisistoensureuniformdistributionof
thegrease.
Figure88.Thermalgreaseonthemicroprocessor
Figure89.Thermal-greasesyringe
Note:Onetickmarkonthesyringeis0.01mL.Ifthegreaseisproperlyapplied,approximatelyhalf
(0.22mL)ofthegreasewillremaininthesyringe.
Step6.Installtheheatsinkontothemicroprocessor.See“Installingthemicroprocessorandheatsink
(Trainedtechnicianonly)”onpage148.
Removingthepowerdistributionboardcover
Toremovethepowerdistributionboardcover,dothefollowing:
Step1.Turnofftheserver.Then,disconnectallexternalcablesandremoveallperipheraldevices.
Step2.Removetheservercover.See“Removingtheservercover”onpage88.
Step3.RemoveanyconnectedSAS/SATAsignalcableandallothercablesthatpassthroughthepower
distributionboardcover.See“Internalcablerouting”onpage158
.
Chapter7.Removingandinstallingservercomponents151