三星显示器图纸 (79)

SAMSUNGCOLORMONITORDP14LSDP14LTDP15LSDP15LTManualSERVICECOLORMONITORCONTENTS1.Precautions2.ProductSpecifications3.OperatingInstructions4.Disassembly&Reassembly5.Alignment&Adjustments6.Troubleshooting7.ExplodedView&PartsList8.ElectricalPartsList9.BlockDiagram10.WiringDiagram11SchematicDiagramsSamsungElectronicsCo.,Ltd.April1999PrintedinKoreaCodeNo.:BH68-00128AWARNINGS1.Forcontinuedsafety,donotattempttomodifythecircuitboard.2.DisconnecttheACpowerbeforeservicing.3.Whenthechassisisoperating,semiconductorheatsinksarepotentialshockhazards.1-1-1ServicingtheHighVoltageVRandCRT:WARNING:DamagedIC202maycauseexcessivex-rayemissions.1.Whenservicingthehighvoltagesystem,removethestaticchargebyconnectinga10kohmresistorinserieswithaninsulatedwire(suchasatestprobe)betweenthechassisandtheanodelead.2.IftheHVVRrequiresadjustment:Thismonitordoesnotneedtoadjusthighvoltage,highvoltagestepissavedatIC202,adjustingthishighvoltageto24.5±0.5kV-14Ó,25.0±0.5kV-15Ó.3.WhentroubleshootingamonitorwithexcessivelyHV,avoidbeingunnecessarilyclosetothemonitor.Donotoperatethemonitorforlongerthanisnecessarytolocatethecauseofexcessivevoltage.4.Highvoltageshouldalwaysbekeptattheratedvalue,nohigher.OnlywhenhighvoltageisexcessiveareX-rayscapableofpenetratingtheshelloftheCRT,includingtheleadinglassmaterial.OperationathighvoltagesmayalsocausefailureoftheCRTorhighvoltagecircuitry.5.WhentheHVregulatorisoperatingproperly,thereisnopossibilityofanX-rayproblem.MakesuretheHVdoesnotexceeditsspecifiedvalueandthatitisregulatingcorrectly.6.TheCRTisespeciallydesignedtoprohibitX-rayemissions.ToensurecontinuedX-rayprotection,replacetheCRTonlywithonethatisthesameorequivalenttypeastheoriginal.7.HandletheCRTonlywhenwearingshatterproofgogglesandaftercompletelydischargingthehighvoltageanode.8.DonotlifttheCRTbytheneck.1-1-2FireandShockHazard:Beforereturningthemonitortotheuser,performthefollowingsafetychecks:1.Inspecteachleaddresstomakecertainthattheleadsarenotpinchedorthathardwareisnotlodgedbetweenthechassisandothermetalpartsinthemonitor.2.Inspectallprotectivedevicessuchasnonmetalliccontrolknobs,insulatingmaterials,cabinetbacks,adjustmentandcompartmentcoversorshields,isolationresistor-capacitornetworks,mechanicalinsulators,etc.3.LeakageCurrentHotCheck(Figure1-1):WARNING:Donotuseanisolationtransformerduringthistest.UsealeakagecurrenttesterorameteringsystemthatcomplieswithAmericanNationalStandardsInstitute(ANSIC101.1,LeakageCurrentforAppliances),andUnderwritersLaboratories(ULPublicationUL1410,59.7).4.Withtheunitcompletelyreassembled,plugtheAClinecorddirectlyintoa120VACoutlet.WiththeunitÕsACswitchfirstintheONpositionandthenOFF,measurethecurrentbetweenaknownearthground(metalwaterpipe,conduit,etc.)andallexposedmetalparts,including:metalcabinets,screwheadsandcontrolshafts.Thecurrentmeasuredshouldnotexceed0.5milliamp.Reversethepower-plugprongsintheACoutletandrepeatthetest.Figure1-1.LeakageCurrentTestCircuit1-1-4ProductSafetyNoticesSomeelectricalandmechanicalpartshavespecialsafety-relatedcharacteristicswhichareoftennotevidentfromvisualinspection.Theprotectiontheygivemaynotbeobtainedbyreplacingthemwithcomponentsratedforhighervoltage,wattage,etc.Partsthathavespecialsafetycharacteristicsareidentifiedbyonschematicsandpartslists.Asubstitutereplacementthatdoesnothavethesamesafetycharacteristicsastherecommendedreplacementpartmightcreateshock,fireand/orotherhazards.Productsafetyisunderreviewcontinuouslyandnewinstructionsareissuedwheneverappropriate.Componentsidentifiedbyonschematicsandpartslistsmustbesealedbyasolderingironafterreplacementandadjustment.DP14L*/DP15L*1-11Precautions1-1SafetyPrecautions!DEVICEUNDERTESTTESTALLEXPOSEDMETALSURFACES(READINGSHOULDNOTBEABOVE0.5mA)LEAKAGECURRENTTESTER2-WIRECORDALSOTESTWITHPLUGREVERSED(USINGACADAPTERPLUGASREQUIRED)EARTHGROUND1.Servicingprecautionsareprintedonthecabinet,andshouldbefollowedclosely.2.AlwaysunplugtheunitÕsACpowercordfromtheACpowersourcebeforeattemptingto:(a)removeorreinstallanycomponentorassembly,(b)disconnectPCBplugsorconnectors,(c)connectalltestcomponentsinparallelwithanelectrolyticcapacitor.3.Somecomponentsareraisedabovetheprintedcircuitboardforsafety.Aninsulationtubeortapeissometimesused.Theinternalwiringissometimesclampedtopreventcontactwiththermallyhotcomponents.Reinstallallsuchelementstotheiroriginalposition.4.Afterservicing,alwayscheckthatthescrews,componentsandwiringhavebeencorrectlyreinstalled.Makesurethattheareaaroundtheservicedparthasnotbeendamaged.1.Immediatelybeforehandlinganysemiconductorcomponentsorassemblies,draintheelectrostaticchargefromyourbodybytouchingaknownearthground.Alternatively,wearadischargingwrist-strapdevice.Toavoidashockhazard,besuretoremovethewriststrapbeforeapplyingpowertothemonitor.2.AfterremovinganESD-equippedassembly,placeitonaconductivesurfacesuchasaluminumfoiltopreventaccumulationofanelectrostaticcharge.3.Donotusefreon-propelledchemicals.ThesecangenerateelectricalchargessufficienttodamageESDs.4.Useonlyagrounded-tipsolderingirontosolderordesolderESDs.5.Useonlyananti-staticsolderremovaldevice.Somesolder