Lenovo B50-30 Spezifikationen PDF herunterladen (Seite 36)

Lenovo B50-30/B50-30 Touch/B50-45/ B50-70

Hardware Maintenance Manual

Thissectionpresentsexplodedfigures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

certified.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

figures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figure.

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

figure.

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65.

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

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flakes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.

Note:TheillustrationsusedinthissectionareoftheLenovoB50‐70,unless

otherwisestated.

Removing and replacing an FRU

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.

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Lenovo B50-30 Spezifikationen Seite 36