Computer Hardware User Manual

•Checktheareaforelectricalhazardssuchasmoistoors,nongroundedpowerextensioncords,power
surges,andmissingsafetygrounds.
•Useonlyapprovedtoolsandtestequipment.Somehandtoolshavehandlesthatarecoveredwithasoft
materialthatdoesnotprovideinsulationfromliveelectricalcurrents.
•Regularlyinspectandmaintainyourelectricalhandtoolsforsafeoperationalcondition.Donotuse
wornorbrokentoolsortesters.
•Donottouchthereectivesurfaceofadentalmirrortoaliveelectricalcircuit.Thesurfaceisconductive
andcancausepersonalinjuryorequipmentdamageifittouchesaliveelectricalcircuit.
•Somerubberoormatscontainsmallconductiveberstodecreaseelectrostaticdischarge.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.
–Whenyouareworkingwithpowered-onelectricalequipment,useonlyonehand.Keeptheother
handinyourpocketorbehindyourbacktoavoidcreatingacompletecircuitthatcouldcausean
electricalshock.
–Whenyouuseatester,setthecontrolscorrectlyandusetheapprovedprobeleadsandaccessories
forthattester.
–Standonasuitablerubbermattoinsulateyoufromgroundssuchasmetaloorstripsandequipment
frames.
•Useextremecarewhenyoumeasurehighvoltages.
•Toensurepropergroundingofcomponentssuchaspowersupplies,pumps,blowers,fans,andmotor
generators,donotservicethesecomponentsoutsideoftheirnormaloperatinglocations.
•Ifanelectricalaccidentoccurs,usecaution,turnoffthepower,andsendanotherpersontogetmedical
aid.
Workinginsidetheserverwiththepoweron
Attention:Staticelectricitythatisreleasedtointernalservercomponentswhentheserverispowered-on
mightcausetheservertohalt,whichmightresultinthelossofdata.Toavoidthispotentialproblem,
alwaysuseanelectrostatic-dischargewriststraporothergroundingsystemwhenyouworkinsidethe
serverwiththepoweron.
Youmightbeinstructedtoturnontheserverwhilethecoverisoff,tolookatsystem-boardLEDs.Follow
theseguidelineswhenyouworkinsideaserverthatisturnedon:
•Avoidwearingloose-ttingclothingonyourforearms.Buttonlong-sleevedshirtsbeforeworkinginside
theserver;donotwearcufflinkswhileyouareworkinginsidetheserver.
•Donotallowyournecktieorscarftohanginsidetheserver.
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