User's Manual

Chapter8.FRUreplacementnotices

Thischapterpresentsnoticesrelatedtoremovingandreplacingparts.Readthischaptercarefullybefore

replacinganyFRU.

Screwnotices

Loosescrewscancauseareliabilityproblem.IntheThinkPadNotebook,thisproblemisaddressedwith

specialnylon-coatedscrewsthathavethefollowingcharacteristics:

•Theymaintaintightconnections.

•Theydonoteasilycomeloose,evenwithshockorvibration.

•Theyarehardertotighten.

•Eachoneshouldbeusedonlyonce.

Dothefollowingwhenyouservicethismachine:

•Keepthescrewkit(fortheP/N,seeMiscellaneousparts)inyourtoolbag.

•Alwaysusenewscrews.

•Useatorquescrewdriverifyouhaveone.

Tightenscrewsasfollows:

•Plastictoplastic

Turnanadditional90degreesafterthescrewheadtouchesthesurfaceoftheplasticpart:

•Logiccardtoplastic

Turnanadditional180degreesafterthescrewheadtouchesthesurfaceofthelogiccard:

•Torquedriver

Ifyouhaveatorquedriver,refertothe“Torque”columnforeachstep.

–Makesurethatyouusethecorrectscrew.Ifyouhaveatorquescrewdriver,tightenallscrewsrmly

tothetorqueshowninthetable.Neveruseascrewthatyouremoved.Useanewone.Make

surethatallofthescrewsaretightenedrmly.

–Ensuretorquescrewdriversarecalibratedcorrectlyfollowingcountryspecications.