Lenovo System x3500 M5 Type 5464 - Guidelines for Servicing Electrical Equipment

5.Checkforanyobviousunsupportedalterations.Usegoodjudgmentastothesafetyofanyunsupported
alterations.
6.Checkinsidethesystemforanyobviousunsafeconditions,suchasmetalfilings,contamination,water
orotherliquid,orsignsoffireorsmokedamage.
7.Checkforworn,frayed,orpinchedcables.
8.Makesurethatthepower-supplycoverfasteners(screwsorrivets)havenotbeenremovedortampered
with.
Guidelinesforservicingelectricalequipment
Observetheseguidelineswhenyouserviceelectricalequipment.
•Checktheareaforelectricalhazardssuchasmoistfloors,nongroundedpowerextensioncords,and
missingsafetygrounds.
•Useonlyapprovedtoolsandtestequipment.Somehandtoolshavehandlesthatarecoveredwithasoft
materialthatdoesnotprovideinsulationfromliveelectricalcurrent.
•Regularlyinspectandmaintainyourelectricalhandtoolsforsafeoperationalcondition.Donotuse
wornorbrokentoolsortesters.
•Donottouchthereflectivesurfaceofadentalmirrortoaliveelectricalcircuit.Thesurfaceisconductive
andcancausepersonalinjuryorequipmentdamageifittouchesaliveelectricalcircuit.
•Somerubberfloormatscontainsmallconductivefiberstodecreaseelectrostaticdischarge.Donotuse
thistypeofmattoprotectyourselffromelectricalshock.
•Donotworkaloneunderhazardousconditionsornearequipmentthathashazardousvoltages.
•Locatetheemergencypower-off(EPO)switch,disconnectingswitch,orelectricaloutletsothatyoucan
turnoffthepowerquicklyintheeventofanelectricalaccident.
•Disconnectallpowerbeforeyouperformamechanicalinspection,worknearpowersupplies,orremove
orinstallmainunits.
•Beforeyouworkontheequipment,disconnectthepowercord.Ifyoucannotdisconnectthepower
cord,havethecustomerpower-offthewallboxthatsuppliespowertotheequipmentandlockthe
wallboxintheoffposition.
•Neverassumethatpowerhasbeendisconnectedfromacircuit.Checkittomakesurethatithasbeen
disconnected.
•Ifyouhavetoworkonequipmentthathasexposedelectricalcircuits,observethefollowingprecautions:
–Makesurethatanotherpersonwhoisfamiliarwiththepower-offcontrolsisnearyouandisavailableto
turnoffthepowerifnecessary.
–Whenyouworkwithpowered-onelectricalequipment,useonlyonehand.Keeptheotherhandinyour
pocketorbehindyourbacktoavoidcreatingacompletecircuitthatcouldcauseanelectricalshock.
–Whenyouuseatester,setthecontrolscorrectlyandusetheapprovedprobeleadsandaccessories
forthattester.
–Standonasuitablerubbermattoinsulateyoufromgroundssuchasmetalfloorstripsandequipment
frames.
•Useextremecarewhenyoumeasurehighvoltages.
•Toensurepropergroundingofcomponentssuchaspowersupplies,pumps,blowers,fans,andmotor
generators,donotservicethesecomponentsoutsideoftheirnormaloperatinglocations.
•Ifanelectricalaccidentoccurs,usecaution,turnoffthepower,andsendanotherpersontogetmedical
aid.
©CopyrightLenovo2015,2017
vii