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Electricalsafety
Observethefollowingruleswhenworkingonelectricalequipment.
Important:Useonlyapprovedtoolsandtestequipment.Somehandtoolshavehandlescoveredwithasoft
materialthatdoesnotinsulateyouwhenworkingwithliveelectricalcurrents.Manycustomershave,near
theirequipment,rubberoormatsthatcontainsmallconductiveberstodecreaseelectrostaticdischarges.
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:
–Usecaution;donotbecomeavictimyourself.
–Switchoffpower.
2HardwareMaintenanceManual
- HardwareMaintenanceManual 1
- EighthEdition(April2012) 2
- ©CopyrightLenovo2009,2012 2
- Contents 3
- Chapter9.Locations........105 4
- AppendixA.Notices.........157 4
- Aboutthismanual 5
- Chapter1.Safetyinformation 7
- Electricalsafety 8
- Safetyinspectionguide 9
- Groundingrequirements 10
- Chapter1.Safetyinformation5 11
- 6HardwareMaintenanceManual 12
- .Safetyinformation7 13
- Chapter1.Safetyinformation9 15
- Chapter1.Safetyinformation11 17
- 12HardwareMaintenanceManual 18
- .Safetyinformation13 19
- 14HardwareMaintenanceManual 20
- .Safetyinformation15 21
- 16HardwareMaintenanceManual 22
- Chapter1.Safetyinformation17 23
- 18HardwareMaintenanceManual 24
- .Safetyinformation19 25
- 20HardwareMaintenanceManual 26
- .Safetyinformation21 27
- 22HardwareMaintenanceManual 28
- StrategyforreplacingFRUs 29
- Howtouseerrormessage 30
- Productdenition 30
- 26HardwareMaintenanceManual 32
- Chapter3.Generalcheckout 33
- Checkoutguide 34
- Chapter3.Generalcheckout29 35
- Chapter3.Generalcheckout31 37
- PC-DoctorforRescueandRecovery 38
- FRUtests 38
- LenovoSolutionCenter 39
- Quicktestprograms 39
- UEFIdiagnosticprogram 40
- Bootablediagnosticprograms 40
- Powersystemcheckout 41
- CheckingtheACadapter 41
- Checkingoperationalcharging 42
- Checkingthebatterypack 42
- Checkingthebackupbattery 43
- 38HardwareMaintenanceManual 44
- Passwords 47
- Power-onpassword 47
- Hard-diskpassword 47
- Supervisorpassword 47
- Powermanagement 48
- Screenblankmode 49
- Sleep(standby)mode 49
- Hibernationmode 49
- Symptom-to-FRUindex 50
- Numericerrorcodes 51
- 46HardwareMaintenanceManual 52
- .Relatedserviceinformation47 53
- 48HardwareMaintenanceManual 54
- Errormessages 55
- Beepsymptoms 56
- No-beepsymptoms 57
- LCD-relatedsymptoms 57
- Intermittentproblems 58
- Undeterminedproblems 58
- .Relatedserviceinformation53 59
- 54HardwareMaintenanceManual 60
- Chapter5.Statusindicators 61
- 56HardwareMaintenanceManual 62
- .Statusindicators57 63
- 58HardwareMaintenanceManual 64
- Chapter6.Fnkeycombinations 65
- 60HardwareMaintenanceManual 66
- Screwnotices 67
- Retainingserialnumbers 68
- RetainingtheUUID 69
- 64HardwareMaintenanceManual 70
- 1010Batterypack 72
- 1040DIMM 75
- 1,butdonotremovethem 77
- 1070Keyboard 80
- .RemovingandreplacingaFRU75 81
- Installationstepsofkeyboard 82
- 1.Attachthekeyboardconnector 82
- 76HardwareMaintenanceManual 82
- .RemovingandreplacingaFRU77 83
- 1080Backupbattery 84
- 1150LCDunit 91
- 2010LCDbezelassembly 100
- 2020LCDlatchLandR 101
- 2040LEDsubcard 103
- 2050LCDpanel 104
- 2060LCDcable 106
- 2070Hingekit 106
- 2080LEDcable 107
- StepScrew(quantity)Color 109
- Black0.181Nm 109
- (1.85kgfcm) 109
- 104HardwareMaintenanceManual 110
- Frontview 111
- Rearview 112
- Bottomview 112
- .Locations107 113
- 108HardwareMaintenanceManual 114
- Chapter10.Partslist 115
- 110HardwareMaintenanceManual 116
- .Partslist111 117
- 112HardwareMaintenanceManual 118
- .Partslist113 119
- 114HardwareMaintenanceManual 120
- .Partslist115 121
- 116HardwareMaintenanceManual 122
- .Partslist117 123
- 118HardwareMaintenanceManual 124
- .Partslist119 125
- 120HardwareMaintenanceManual 126
- .Partslist121 127
- 122HardwareMaintenanceManual 128
- .Partslist123 129
- 124HardwareMaintenanceManual 130
- .Partslist125 131
- 126HardwareMaintenanceManual 132
- .Partslist127 133
- 128HardwareMaintenanceManual 134
- .Partslist129 135
- 130HardwareMaintenanceManual 136
- .Partslist131 137
- 132HardwareMaintenanceManual 138
- .Partslist133 139
- 134HardwareMaintenanceManual 140
- .Partslist135 141
- 136HardwareMaintenanceManual 142
- .Partslist137 143
- Keyboard 144
- Miscellaneousparts 145
- 140HardwareMaintenanceManual 146
- .Partslist141 147
- ACadapters 148
- Powercords 148
- Recoverydiscs 149
- Chapter10.Partslist145 151
- Chapter10.Partslist147 153
- Chapter10.Partslist149 155
- Windows7HomeBasic(32bit)DVDs 157
- Chapter10.Partslist153 159
- Chapter10.Partslist155 161
- Commonservicetools 162
- AppendixA.Notices 163
- Trademarks 164
- *45M2271_07* 166
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