Lenovo x3650 M4 BD 5466 - Page 81

Figure56.Heat-sinkinstallation
a.Removetheplasticprotectivecoverfromthebottomoftheheatsink.
b.Alignthescrewholesontheheatsinkwiththeholesonthesystemboard.
c.Placetheheatsinkonthemicroprocessorwiththethermal-greasesidedown.
d.Pressfirmlyonthecaptivescrewsandtightenthemwithascrewdriver.Thefollowillustration
showsthesequenceintighteningthescrews,whichisalsoshownontopoftheheatsink.
Beginwiththescrewlabeledas"1",then"2","3"andfinally"4".Ifpossible,eachscrew
shouldberotatedtwofullrotationsatatime.Repeatuntilthescrewsaretight.Donot
overtightenthescrewsbyusingexcessiveforce.Ifyouareusingatorquewrench,tightenthe
screwsto8.5Newton-meters(Nm)to13Nm(6.3foot-poundsto9.6foot-pounds).
Note:PleaseusePhillipsscrewdriverNo.0tofastenscrews.
Figure57.Screwssequence
Ifyouhaveotherdevicestoinstallorremove,dosonow.Otherwise,goto“Completingtheinstallation”
onpage73.
Chapter2.Installingoptionaldevices67