Lenovo x3250 m6 - Page 164

Step2.Installtheheatsinkonthemicroprocessor.
Attention:Donottouchthethermalgreaseonthebottomoftheheatsink.Touchingthethermal
greasewillcontaminateit.Ifthethermalgreaseonthemicroprocessororheatsinkbecomes
contaminated,youmustwipeoffthecontaminatedthermalgreaseonthemicroprocessororheat
sinkwiththealcoholwipesandreapplycleanthermalgreasetotheheatsink.
a.AligntheheatsinksothatthearrowsonthelabelpointtowardtheDIMMsandplacetheheat
sinkontopofthemicroprocessor,thermalgreasesidedown.
b.Alignthescrewsontheheatsinkwiththescrewholesinthesystemboard.
c.Tightenthescrews1withascrewdriver,alternatingamongthescrewsuntiltheyaretight.If
possible,eachscrewshouldberotatedtwofullrotationsatatime.Repeatuntilthescrews
aretight.
Attention:Whenthetwoscrewsthatareclosertotherearoftheserveraretightened,the
screwheadsarenotlevelwiththesurfaceoftheheatsink.Donotovertightenthescrews
byusingexcessiveforce.
Figure87.Heatsinkinstallation
Step3.Completethepartsreplacement.See“Completingthepartsreplacement”onpage172.
Thermalgrease
Thethermalgreasemustbereplacedwhenevertheheatsinkhasbeenremovedfromthetopofthe
microprocessor.Usethefollowinginformationtoreplacedamagedorcontaminatedthermalgreaseonthe
microprocessorandheatsink.
Read“Handlingstatic-sensitivedevices”onpage88.
Toreplacedamagedorcontaminatedthermalgreaseonthemicroprocessorandheatsink,dothefollowing:
Step1.Placetheheatsinkonacleanworksurface.
Step2.Removethecleaningpadfromitspackageandunfolditcompletely.
150LenovoSystemx3250M6InstallationandServiceGuide