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Lenovo G50-30/G50-45/G50-70/G50-70m/Z50-70/Z50-75/G50-80
FRU replacement notices
Thissectionpresentsnoticesrelatedtoremovingandreplacingparts.Read
thissectioncarefullybeforereplacinganyFRU.
Screw notices
Loosescrewscancauseareliabilityproblem.IntheLenovocomputer,this
problemisaddressedwithspecialnylon-coatedscrewsthathavethefollowing
characteristics:
• Theymaintaintightconnections.
• Theydonoteasilycomeloose,evenwithshockorvibration.
• Theyarehardertotighten.
• Eachoneshouldbeusedonlyonce.
Dothefollowingwhenyouservicethismachine:
• Keepthescrewkitinyourtoolbag.
• CarefullyremovescrewsforreusewhenreplacingFRUs.
• Useatorquescrewdriverifyouhaveone.
Tightenscrewsasfollows:
•
Plastic to plastic
Turnanadditional90°afterthescrewheadtouchesthesurfaceofthe
plasticpart:
(Cross-section)
•
Torque driver
Ifyouhaveatorquescrewdriver,refertothe“Torque”columnforeachstep.
• Makesurethatyouusethecorrectscrews.Ifyouhaveatorquescrewdriver,
tightenallscrewsrmlytothetorqueshowninthetable.
Carefully remove
screws for reuse when replacing FRUs. Make sure that all screws are
tightened rmly.
• Ensuretorque screwdriversarecalibratedcorrectlyfollowing country
specications.