Lenovo G50-45 Notebook Lenovo Bedienungsanleitung PDF herunterladen (Seite 36)

G50-30/G50-45/G50-70/G50-70m/Z50-70/Z50-75 Hardware Maintenance Manual

Removing and replacing an FRU

Thissectionpresentsexplodedgureswiththeinstructionstoindicatehowto

removeandreplacetheFRU.Makesuretoobservethefollowinggeneralrules:

1. Donotattempttoserviceanycomputerunlessyouhavebeentrainedand

certied.Anuntrainedpersonrunstheriskofdamagingparts.

2. BeforereplacinganyFRU,review“FRUreplacementnotices”onpage31.

3. BeginbyremovinganyFRUsthathavetoberemovedbeforethefailing

FRU.AnyofsuchFRUsarelistedatthetopofthepage.Removethemin

theorderinwhichtheyarelisted.

4. FollowthecorrectsequenceinthestepstoremovetheFRU,asgiveninthe

guresbythenumbersinsquarecallouts.

5. WhenturningascrewtoreplaceanFRU,turnitinthedirectionasgivenby

thearrowinthegure.

6. WhenremovingtheFRU,moveitinthedirectionasgivenbythearrowin

thegure.

7. ToputthenewFRUinplace,reversetheremovalproceduresandfollow

anyofthenotesthatpertaintoreplacement.For information about

connectingandarranginginternalcables,see“Locations”onpage68.

8. WhenreplacinganFRU,usethecorrectscrewasshownintheprocedures.

DANGER

Before removing any FRU, turn off the computer, unplug all power cords from

electrical outlets, remove the battery pack, and then disconnect any of the

interconnecting cables.

Attention:

AfterreplacinganFRU,donotturnonthecomputeruntilyouhave

madesurethatallscrews,springs,andothersmallpartsareinplaceandnone

arelooseinsidethecomputer.Verifythis by shakingthecomputer gentlyand

listeningforrattlingsounds.Metallicpartsormetalakescancauseelectrical

shortcircuits.

Attention:

The systemboard is sensitiveto,and can bedamagedby,

electrostaticdischarge.Beforetouchingit, establishpersonalgroundingby

touchingagroundpointwithonehandorusinganelectrostaticdischarge(ESD)

strap(P/N6405959)toremovepotentialshockreasons.

Notes:

•

The following procedures about removing and replacing FRUs are the same for the

Lenovo G50-30/G50-45/G50-70/G50-70m/Z50-70/Z50-75.

•

The illustrations used in this section are of the Lenovo G50-70, unless otherwise

stated.

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Lenovo G50-45 Notebook Lenovo Bedienungsanleitung Seite 36