索尼液晶电视KLV-SG21M1-HG26M1维修手册

SERVICEMANUALSPECIFICATIONSKLV-HG26M1/SG21M1LCDColourTVChineseModelDisplayUnit:P(KLV-HG26M1)owerRequirement:220–240VAC,50HzScreenSize:26inchesApprox.58.7cmmeasureddiagonallyDisplayResolution:1,280dots(horizontal)768lines(vertical)PowerConsumption:110WStandbyPowerConsumption:0.8WorlessDimensions(whd):Approx.79.049.024.0cm(withstand)Approx.79.043.013.8cm(withoutstand)Weight:Approx.18.4kg(withstandandrearcover)Approx.15.2kg(withoutstandandrearcover)xxxP(KLV-SG21M1)owerRequirement:220–240VAC,50HzScreenSize:21inchesApprox.53.7cmmeasureddiagonallyDisplayResolution:1,024dots(horizontal)768lines(vertical)PowerConsumption:95WStandbyPowerConsumption:0.8WorlessDimensions(whd):Approx.63.046.024.2cm(withstand)Approx.63.040.412.7cm(withoutstand)Weight:Approx.11.3kg(withstandandrearcover)Approx.8.6kg(withoutstandandrearcover)PanelSystem:LCD(LiquidCrystalDisplay)PanelTVSystem:Dependingonyourcountry/regionselection:D/K,L,IColourSystem:PAL,SECAMNTSC3.58,4.43(onlyVideoIn)Aerial:75ohmexternalterminalforVHF/UHFChannelCoverage:VHF:E2–E12UHF:E21–E69CATV:S1–S20HYPER:S21–S41D/K:R1–R12,R21–R69I:UHFB21–B69xxxxxxxxxxxKLV-HG26M1/SG21M1(CH)2Terminals:Videoinput/SVideoinput/AudioinputVideoinput/SVideoinput/Audioinput3Y:1Vp-p,75ohms,0.3VnegativesyncPB:0.7Vp-p,75ohmsPR:0.7Vp-p,75ohms3audioinput(phonojacks)500mVrms(100%modulation),Impedance:47kiloohms4Audioinput(phonojacks)Audiooutput(Left/Right)(phonojacks)
Headphonesjack“MemoryStick”slotSoundOutput:Fullrangespeaker:4.0W+4.0WAccessoriesSupplied:•RemotecontrolRM-Y1103(1)•SizeAAbatteries(R6type)(2)•Coaxialcable(1)•Mainslead(TypeC-6)(1)•Mainslead(TypeBF)(1)•Rearcover(1)OptionalAccessory:•Wall-MountBracketSU-W210(KLV-SG21M1),SU-LW/(KLV-HG26M1)OtherFeatures:•SleepTimer•TVsystemautodetection•ScreenMemo11/1/222KLV-HG26M1/SG21M1(CH)3LEAKAGETESTTheACleakagefromanyexposedmetalparttoearthgroundandfromallexposedmetalpartstoanyexposedmetalparthavingareturntochassis,mustnotexceed0.5mA(500microamperes).Leakagecurrentcanbemeasuredbyanyoneofthreemethods.1.Acommercialleakagetester,suchastheSimpson229orRCAWT-540A.Followthemanufacturers’instructionstousetheseinstruments.2.Abattery-operatedACmilliammeter.TheDataPrecision245digitalmultimeterissuitableforthisjob.3.MeasuringthevoltagedropacrossaresistorbymeansofaVOMorbattery-operatedACvoltmeter.The“limit”indica-tionis0.75V,soanalogmetersmusthaveanaccuratelow-voltagescale.TheSimpson250andSanwaSH-63TrdareexamplesofapassiveVOMsthataresuitable.Nearlyallbatteryoperateddigitalmultimetersthathavea2VACrangearesuitable.(SeeFig.A)Aftercorrectingtheoriginalserviceproblem,performthefol-lowingsafetychecksbeforereleasingthesettothecustomer:1.Checktheareaofyourrepairforunsolderedorpoorly-sol-deredconnections.Checktheentireboardsurfaceforsoldersplashesandbridges.2.Checktheinterboardwiringtoensurethatnowiresare“pinched”orcontacthigh-wattageresistors.3.Checkthatallcontrolknobs,shields,covers,groundstraps,andmountinghardwarehavebeenreplaced.Beabsolutelycertainthatyouhavereplacedalltheinsulators.4.Lookforunauthorizedreplacementparts,particularlytran-sistors,thatwereinstalledduringapreviousrepair.Pointthemouttothecustomerandrecommendtheirreplacement.5.Lookforpartswhich,thoughfunctioning,showobvioussignsofdeterioration.Pointthemouttothecustomerandrecommendtheirreplacement.6.Checkthelinecordsforcracksandabrasion.Recommendthereplacementofanysuchlinecordtothecustomer.7.ChecktheB+andHVtoseeiftheyarespecifiedvalues.Makesureyourinstrumentsareaccurate;besuspiciousofyourHVmeterifsetsalwayshavelowHV.8.Checktheantennaterminals,metaltrim,“metallized”knobs,screws,andallotherexposedmetalpartsforACLeakage.Checkleakageasdescribedright.SAFETYCHECK-OUTFig.A.UsinganACvoltmetertocheckACleakage.1.5kΩ0.15µFACVoltmeter(0.75V)ToExposedMetalPartsonSetEarthGroundWARNING!!SAFETY-RELATEDCOMPONENTWARNING!!COMPONENTSIDENTIFIEDBYSHADINGANDMARK!ONTHESCHEMATICDIAGRAMS,EXPLODEDVIEWSANDINTHEPARTSLISTARECRITICALFORSAFEOPERATION.REPLACETHESECOMPONENTSWITHSONYPARTSWHOSEPARTNUMBERSAP-PEARASSHOWNINTHISMANUALORINSUPPLE-MENTSPUBLISHEDBYSONY.CIRCUITADJUST-MENTSTHATARECRITICALFORSAFEOPERATIONAREIDENTIFIEDINTHISMANUAL.FOLLOWTHESEPROCEDURESWHENEVERCRITICALCOMPONENTSAREREPLACEDORIMPROPEROPERATIONISSUS-PECTED.AVERTISSEMENT!!ATTENTIONAUXCOMPOSANTSRELATIFSÀLASÉCURITÉ!!LESCOMPOSANTSIDENTIFIÉSPARUNETRAMEETUNEMARQUE!SONTCRITIQUESPOURLASÉCURITÉ.NELESREMPLACERQUEPARUNEPIÈCEPORTANTLENUMÉROSPECIFIÉ.LESRÉGLAGESDECIRCUITDONTL’IMPORTANCEESTCRITIQUEPOURLASÉCURITÉDUFONCTIONNEMENTSONTIDENTIFIÉSDANSLEPRÉSENTMANUEL.SUIVRECESPROCÉDURESLORSDECHAQUEREMPLACEMENTDECOMPOSANTSCRITIQUES,OULORSQU’UNMAUVAISFONCTIONNEMENTESTSUSPECTÉ.KLV-HG26M1/SG21M1(CH)4TABLEOFCONTENTS1.DISASSEMBLY......................................1-11-1.REARCOVERANDSTANDASSYREMOVAL1-11-2.REARCABINETREMOVAL..............................1-11-3.MSANDU1BOARDSREMOVAL.....................1-21-4.GBOARDREMOVAL.........................................1-21-5.BANDMSBBOARDSREMOVAL.....................1-31-6.A,TUANDU2BOARDSREMOVAL.................1-31-7.H1ANDMSXBOARDSREMOVAL...................