Lenovo K4450A Manual del propietario

HardwareMaintenanceManual

LenovoK4450andK4450A

Note:Beforeusingthisinformationandtheproductitsupports,besuretoreadthegeneralinformation

underAppendixA“Notices”onpage79.

FirstEdition(May2014)

©CopyrightLenovo2014

LIMITEDANDRESTRICTEDRIGHTSNOTICE:IfdataorsoftwareisdeliveredpursuantaGeneralServices

Administration“GSA”contract,use,reproduction,ordisclosureissubjecttorestrictionssetforthinContract

NoGS-35F-05925

Contents

Aboutthismanualiii

Chapter1Safetyinformation1

eneralsafety...............1

Electricalsafety..............1

Safetyinspectionguide...........3

Handlingdevicesthataresensitivetoelectrostatic

discharge.................3

roundingrequirements...........4

Safetynotices(multilingualtranslations).....4

Chapter2Generalcheckout21

Whattodoﬁrst..............21

Powersystemcheckout...........22

Checkingtheacpoweradapter......22

Checkingoperationalcharging......23

Checkingthebatterypack........23

Chapter3Importantservice

information25

Recoveringthecomputersettings.......25

Usingpasswords..............25

Powermanagement............26

Screenblankmode...........26

Sleepmode..............26

Hibernationmode...........27

Chapter4Statusindicators29

Chapter5Fnkeycombinations31

Chapter6Locations33

Locatingcomputercontrols,connectors,and

indicators.................33

Frontview...............33

Bottomview..............34

LocatingFRUsandCRUs..........34

MajorFRUsandCRUs..........35

LCDFRUsandCRUs..........37

PartnumbersfororderableFRUsandCRUs.38

Chapter7FRUreplacement

notices45

ImportantnoticeforreplacingFRUs......45

Screwnotices...............46

Chapter8Removingorreplacinga

FRU47

eneralguidelines.............47

1010Batterypack.............48

1020Bottomslotcover...........48

1030Memorymodules...........49

1040Harddiskdriveassembly........51

1050PCIExpressMiniCardforwirelessLAN..52

1060mSATAsolid-statedrive.........53

1070Backupbattery............54

1080Keyboard..............55

1090Keyboardbezel............57

1110Fingerprintboardbracketandﬁngerprint

boardwithcable..............60

1120Powerboard.............61

1130Mediacardreaderslotboard.......61

1140Systemboardassembly.........63

1150Thermalmoduleassembly........66

1160Speakers,LCDunitandbasecover....68

1170DC-inconnector............72

2010LCDfrontbezel............73

2020Cameraandmicrophoneboard......73

2030LCDpanel,LCDcable,andhinges....74

2040AntennaassemblyandLCDrearcover...76

AppendixANotices79

Trademarks................80

©CopyrightLenovo2014i

iiHardwareMaintenanceManual

Aboutthismanual

ThismanualprovidesserviceandreferenceinformationforthefollowingLenovo®products.

MachineMachineType(MT)

LenovoK4450andK4450A80H0,20438

Thismanualprovidesinformationaboutthecomputerfeatures,speciﬁcations,componentlocations,

hardwarereplacementprocedures,andpartslisting.Thismanualalsoincludessafetyguidelinesand

importantnoticesforservicingthecomputer.

Important:

•ThismanualisintendedonlyfortrainedservicetechnicianswhoarefamiliarwithLenovoproducts.Use

thismanualtotroubleshootproblemseffectively.

•BeforeservicingaLenovoproduct,ensurethatyoureadalltheinformationinChapter1“Safety

information”onpage1andChapter3“Importantserviceinformation”onpage25.

©CopyrightLenovo2014iii

ivHardwareMaintenanceManual

Chapter1Safetyinformation

Thischapterpresentsthefollowingsafetyinformationthatyouneedtobefamiliarwithbeforeyouservicea

Lenovonotebookcomputer.

•“eneralsafety”onpage1

•“Electricalsafety”onpage1

•“Safetyinspectionguide”onpage3

•“Handlingdevicesthataresensitivetoelectrostaticdischarge”onpage3

•“roundingrequirements”onpage4

•“Safetynotices(multilingualtranslations)”onpage4

Generalsafety

Followtheserulestoensuregeneralsafety:

•Observegoodhousekeepingintheareaofthemachinesduringandaftermaintenance.

•Whenliftinganyheavyobject:

1.Makesurethatyoucanstandsafelywithoutslipping.

2.Distributetheweightoftheobjectequallybetweenyourfeet.

3.Useaslowliftingforce.Nevermovesuddenlyortwistwhenyouattempttolift.

4.Liftbystandingorbypushingupwithyourlegmuscles;thisactionremovesthestrainfromthe

musclesinyourback.Donotattempttoliftanyobjectthatweighsmorethan16kg(35lb)orthatyou

thinkistooheavyforyou.

•Donotperformanyactionthatcauseshazardstothecustomer,orthatmakestheequipmentunsafe.

•Beforeyoustartthemachine,makesurethatotherservicetechniciansandthecustomer'spersonnelare

notinahazardousposition.

•Placeremovedcoversandotherpartsinasafeplace,awayfromallpersonnel,whileyouareservicing

themachine.

•Keepyourtoolcaseawayfromwalkareassothatotherpeoplewillnottripoverit.

•Donotwearlooseclothingthatcanbetrappedinthemovingpartsofamachine.Makesurethatyour

sleevesarefastenedorrolledupaboveyourelbows.Ifyourhairislong,fastenit.

•Inserttheendsofyournecktieorscarfinsideclothingorfastenitwithanonconductiveclip,about8

centimeters(3inches)fromtheend.

•Donotwearjewelry,chains,metal-frameeyeglasses,ormetalfastenersforyourclothing,becausemetal

objectsaregoodelectricalconductors.

•Wearsafetyglasseswhenyouarehammering,drilling,soldering,cuttingwire,attachingsprings,using

solvents,orworkinginanyotherconditionsthatmightbehazardoustoyoureyes.

•Afterservice,reinstallallsafetyshields,guards,labels,andgroundwires.Replaceanysafetydevice

thatiswornordefective.

•Reinstallallcoverscorrectlybeforereturningthemachinetothecustomer.

•Fanlouversonthemachinehelptopreventoverheatingofinternalcomponents.Donotobstructfan

louversorcoverthemwithlabelsorstickers.

Electricalsafety

Observethefollowingruleswhenworkingonelectricalequipment.

©CopyrightLenovo20141

Important:

Useonlyapprovedtoolsandtestequipment.Somehandtoolshavehandlescoveredwithasoftmaterial

thatdoesnotinsulateyouwhenworkingwithliveelectricalcurrents.

Manycustomershave,neartheirequipment,rubberﬂoormatsthatcontainsmallconductiveﬁbersto

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

metalﬂoorstripsandmachineframes.

Observethespecialsafetyprecautionswhenyouworkwithveryhighvoltages;Instructionsforthese

precautionsareinthesafetysectionsofmaintenanceinformation.Useextremecarewhenmeasuring

highvoltages.

•Regularlyinspectandmaintainyourelectricalhandtoolsforsafeoperationalcondition.

•Donotusewornorbrokentoolsandtesters.

•Neverassumethatpowerhasbeendisconnectedfromacircuit.First,checkthatithasbeenpoweredoff.

•Alwayslookcarefullyforpossiblehazardsinyourworkarea.Examplesofthesehazardsaremoistﬂoors,

nongroundedpowerextensioncables,powersurges,andmissingsafetygrounds.

•Donottouchliveelectricalcircuitswiththereﬂectivesurfaceofaplasticdentalmirror.Thesurfaceis

conductive;suchtouchingcancausepersonalinjuryandmachinedamage.

•Donotservicethefollowingpartswiththepoweronwhentheyareremovedfromtheirnormaloperating

placesinamachine:

–Powersupplyunits

–Pumps

–Blowersandfans

–Motorgenerators

–Similarunitstolistedabove

Thispracticeensurescorrectgroundingoftheunits.

•Ifanelectricalaccidentoccurs:

–Usecaution;donotbecomeavictimyourself.

–Switchoffpower.

–Sendanotherpersontogetmedicalaid.

2HardwareMaintenanceManual

Safetyinspectionguide

Thepurposeofthisinspectionguideistoassistyouinidentifyingpotentiallyunsafeconditions.Aseach

machinewasdesignedandbuilt,requiredsafetyitemswereinstalledtoprotectusersandservicetechnicians

frominjury.Thisguideaddressesonlythoseitems.Y oushouldusegoodjudgmenttoidentifypotential

safetyhazardsduetoattachmentofnon-Lenovofeaturesoroptionsnotcoveredbythisinspectionguide.

Ifanyunsafeconditionsarepresent,youmustdeterminehowserioustheapparenthazardcouldbeand

whetheryoucancontinuewithoutﬁrstcorrectingtheproblem.

Considertheseconditionsandthesafetyhazardstheypresent:

•Electricalhazards,especiallyprimarypower(primaryvoltageontheframecancauseseriousorfatal

electricalshock)

•Explosivehazards,suchasadamagedCRTfaceorabulgingcapacitor

•Mechanicalhazards,suchaslooseormissinghardware

Todeterminewhetherthereareanypotentiallyunsafeconditions,usethefollowingchecklistatthebeginning

ofeveryservicetask.Beginthecheckswiththepoweroff,andthepowercorddisconnected.

Checklist:

1.Checkexteriorcoversfordamage(loose,broken,orsharpedges).

2.Poweroffthecomputer.Disconnectthepowercord.

3.Checkthepowercordfor:

a.Athird-wiregroundconnectoringoodcondition.Useametertomeasurethird-wireground

continuityfor0.1ohmorlessbetweentheexternalgroundpinandtheframeground.

b.Thepowercordshouldbethetypespeciﬁedinthepartslist.

c.Insulationmustnotbefrayedorworn.

4.Checkforcrackedorbulgingbatteries.

5.Removethecover.

6.Checkforanyobviousnon-Lenovoalterations.Usegoodjudgmentastothesafetyofanynon-Lenovo

alterations.

7.Checkinsidetheunitforanyobviousunsafeconditions,suchasmetalﬁlings,contamination,wateror

otherliquids,orsignsofﬁreorsmokedamage.

8.Checkforworn,frayed,orpinchedcables.

9.Checkthatthepower-supplycoverfasteners(screwsorrivets)havenotbeenremovedortamperedwith.

Handlingdevicesthataresensitivetoelectrostaticdischarge

Anycomputerpartcontainingtransistorsorintegratedcircuits(ICs)shouldbeconsideredsensitiveto

electrostaticdischarge(ESD).ESDdamagecanoccurwhenthereisadifferenceinchargebetweenobjects.

ProtectagainstESDdamagebyequalizingthechargesothatthemachine,thepart,theworkmat,andthe

personhandlingthepartareallatthesamecharge.

Notes:

1.Useproduct-speciﬁcESDprocedureswhentheyexceedtherequirementsnotedhere.

2.MakesurethattheESDprotectivedevicesyouusehavebeencertiﬁed(ISO9000)asfullyeffective.

WhenhandlingESD-sensitiveparts:

Chapter1.Safetyinformation3

•Keepthepartsinprotectivepackagesuntiltheyareinsertedintotheproduct.

•Avoidcontactwithotherpeople.

•Wearagroundedwriststrapagainstyourskintoeliminatestaticonyourbody.

•Preventthepartfromtouchingyourclothing.Mostclothingisinsulativeandretainsachargeeven

whenyouarewearingawriststrap.

•Useagroundedworkmattoprovideastatic-freeworksurface.Thematisespeciallyusefulwhen

handlingESD-sensitivedevices.

•Selectagroundingsystem,suchasthoselistedbelow,toprovideprotectionthatmeetsthespeciﬁc

servicerequirement.

Note:TheuseofagroundingsystemtoguardagainstESDdamageisdesirablebutnotnecessary.

–AttachtheESDgroundcliptoanyframeground,groundbraid,orgreen-wireground.

–Whenworkingonadouble-insulatedorbattery-operatedsystem,useanESDcommongroundor

referencepoint.Y oucanusecoaxorconnector-outsideshellsonthesesystems.

–Usetheroundgroundprongoftheacplugonac-operatedcomputers.

Groundingrequirements

Electricalgroundingofthecomputerisrequiredforoperatorsafetyandcorrectsystemfunction.Proper

groundingoftheelectricaloutletcanbeveriﬁedbyacertiﬁedelectrician.

Safetynotices(multilingualtranslations)

Thesafetynoticesinthissectionareprovidedinthefollowinglanguages:

•English

•Arabic

•BrazilianPortuguese

•French

•erman

•Hebrew

•Japanese

•Korean

•Spanish

•T raditionalChinese

DANGER

4HardwareMaintenanceManual

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