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Electricalsafety
Observethefollowingruleswhenworkingonelectricalequipment.
Important:
Useonlyapprovedtoolsandtestequipment.Somehandtoolshavehandlescoveredwithasoftmaterial
thatdoesnotinsulateyouwhenworkingwithliveelectricalcurrents.
Manycustomershave,neartheirequipment,rubberoormatsthatcontainsmallconductivebersto
decreaseelectrostaticdischarges.Donotusethistypeofmattoprotectyourselffromelectricalshock.
•Findtheroomemergencypower-off(EPO)switch,disconnectingswitch,orelectricaloutlet.Ifanelectrical
accidentoccurs,youcanthenoperatetheswitchorunplugthepowercordquickly.
•Donotworkaloneunderhazardousconditionsornearequipmentthathashazardousvoltages.
•Disconnectallpowerbefore:
–Performingamechanicalinspection
–Workingnearpowersupplies
–Removingorinstallingmainunits
•Beforeyoustarttoworkonthemachine,unplugthepowercord.Ifyoucannotunplugit,askthecustomer
topower-offthewallboxthatsuppliespowertothemachine,andtolockthewallboxintheoffposition.
•Ifyouneedtoworkonamachinethathasexposedelectricalcircuits,observethefollowingprecautions:
–Ensurethatanotherperson,familiarwiththepower-offcontrols,isnearyou.
Attention:Anotherpersonmustbetheretoswitchoffthepower,ifnecessary.
–Useonlyonehandwhenworkingwithpowered-onelectricalequipment;keeptheotherhandinyour
pocketorbehindyourback.
Attention:Anelectricalshockcanoccuronlywhenthereisacompletecircuit.Byobservingtheabove
rule,youmaypreventacurrentfrompassingthroughyourbody.
–Whenusingtesters,setthecontrolscorrectlyandusetheapprovedprobeleadsandaccessoriesfor
thattester.
–Standonsuitablerubbermats(obtainedlocally,ifnecessary)toinsulateyoufromgroundssuchas
metaloorstripsandmachineframes.
Observethespecialsafetyprecautionswhenyouworkwithveryhighvoltages;Instructionsforthese
precautionsareinthesafetysectionsofmaintenanceinformation.Useextremecarewhenmeasuring
highvoltages.
•Regularlyinspectandmaintainyourelectricalhandtoolsforsafeoperationalcondition.
•Donotusewornorbrokentoolsandtesters.
•Neverassumethatpowerhasbeendisconnectedfromacircuit.First,checkthatithasbeenpoweredoff.
•Alwayslookcarefullyforpossiblehazardsinyourworkarea.Examplesofthesehazardsaremoistoors,
nongroundedpowerextensioncables,powersurges,andmissingsafetygrounds.
•Donottouchliveelectricalcircuitswiththereectivesurfaceofaplasticdentalmirror.Thesurfaceis
conductive;suchtouchingcancausepersonalinjuryandmachinedamage.
•Donotservicethefollowingpartswiththepoweronwhentheyareremovedfromtheirnormaloperating
placesinamachine:
–Powersupplyunits
–Pumps
–Blowersandfans
–Motorgenerators
–Similarunitstolistedabove
Thispracticeensurescorrectgroundingoftheunits.
•Ifanelectricalaccidentoccurs:
2HardwareMaintenanceManual
- HardwareMaintenanceManual 1
- FourthEdition(April2013) 2
- ©CopyrightLenovo2012,2013 2
- Contents 3
- Aboutthismanual 5
- Chapter1.Safetyinformation 7
- Electricalsafety 8
- Safetyinspectionguide 9
- Groundingrequirements 10
- Chapter1.Safetyinformation5 11
- 6HardwareMaintenanceManual 12
- .Safetyinformation7 13
- Chapter1.Safetyinformation9 15
- VORSICHT 17
- .Safetyinformation11 17
- 12HardwareMaintenanceManual 18
- .Safetyinformation13 19
- 14HardwareMaintenanceManual 20
- .Safetyinformation15 21
- 16HardwareMaintenanceManual 22
- .Safetyinformation17 23
- 18HardwareMaintenanceManual 24
- Chapter1.Safetyinformation19 25
- 20HardwareMaintenanceManual 26
- .Safetyinformation21 27
- 22HardwareMaintenanceManual 28
- .Safetyinformation23 29
- 24HardwareMaintenanceManual 30
- .Safetyinformation25 31
- 26HardwareMaintenanceManual 32
- StrategyforreplacingFRUs 33
- Currentororiginalpart 34
- ReplacementFRU 34
- MustbeRoHSMustbeRoHS 34
- Chapter3.Generalcheckout 35
- Powersystemcheckout 36
- Checkingtheacpoweradapter 36
- Checkingoperationalcharging 37
- Checkingthebatterypack 37
- 32HardwareMaintenanceManual 38
- Recoveringthecomputersettings 39
- Passwords 39
- Power-onpassword 40
- Supervisorpassword 40
- Powermanagement 40
- Screenblankmode 40
- Sleepmode 40
- Hibernationmode 41
- 36HardwareMaintenanceManual 42
- Specications 43
- Statusindicators 44
- Fnkeycombinations 45
- 40HardwareMaintenanceManual 46
- Screwnotices 47
- Generalguidelines 49
- 1010Batterypack 50
- 1020Bottomslotcover 50
- 1030Opticaldrive 51
- 1040Memorymodules 52
- 1050Harddiskdriveassembly 53
- StepScrew(quantity)Color 55
- 1.85kgf-cm 55
- 1070mSATAsolid-statedrive 56
- 1080Backupbattery 57
- 1090Keyboard 57
- 4.0kgf-cm 58
- .RemovingandreplacingaFRU53 59
- 1100Keyboardbezel 60
- Removalstepsofkeyboardbezel 61
- Removethescrew3 61
- .RemovingandreplacingaFRU55 61
- 1110LEDboard 62
- 1120Powerboard 63
- 1130Microphoneassembly 64
- 1140Mediacardreaderslotboard 65
- .RemovingandreplacingaFRU61 67
- 1160Thermalmodule 68
- Removalstepsofthermalmodule 69
- Detachthefanconnector1 69
- Loosenthescrews2to8 69
- .RemovingandreplacingaFRU63 69
- 64HardwareMaintenanceManual 70
- 1170Microprocessor 71
- 1180LCDunit 72
- 1190Speakerassembly 74
- 2010LCDfrontbezel 77
- 2020Camera 78
- 3.Thenremovethehinges4 80
- 76HardwareMaintenanceManual 82
- Chapter8.Locations 83
- Right-sideview 84
- Bottomandleft-sideview 84
- Chapter9.Partslist 85
- .Partslist81 87
- 82HardwareMaintenanceManual 88
- .Partslist83 89
- 84HardwareMaintenanceManual 90
- Chapter9.Partslist85 91
- Keyboard 92
- .Partslist87 93
- 88HardwareMaintenanceManual 94
- Miscellaneousparts 95
- 90HardwareMaintenanceManual 96
- Powercords 97
- 92HardwareMaintenanceManual 98
- .Partslist93 99
- 94HardwareMaintenanceManual 100
- AppendixA.Notices 101
- Electronicemissionsnotices 102
- Trademarks 102
- PartNumber: 104
- PrintedinChina 104
- (1P)P/N: 104
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