三星液晶显示器维修手册（英文版）.pdf

COLOR MONITORCSH7 8 39L(SyncMaster 7 00pCSH98 39L(SyncMaster 900p)SERVICEManualCOLOR MONITORCONTENTS1.Precautions2.Reference Information3.Product Specifications4.Operating Instructions5.Disassembly&Reassembly6.Alignment&Adjustments7.Troubleshooting8.Exploded View&Parts List9.Electrical Parts List10.Block Diagram11.PCB Diagrams12.Wiring Diagram13.Schematic DiagramsSamsung Electronics Co.,Ltd.Ap ril 1998.Printed in KoreaCode No.:BH68-61072A1 Precautios1-1 Safety PrecautionsWAR NINGS1.For continued safety,do not attemp t to modify the circuit board.2.Disconnect the AC p ower before servicing.3.When the chassis is op erating,semiconductor heatsinks are p otential shock hazards.1-1-1 Servicing the High Voltage VR and CRT:WAR NING:A high voltage VR rep laced in the wrong direction may cause excessive X-ray emissions.Caution:When rep lacing the high voltage adjustment VR,it must be fixed by a soldering iron after it is p rop erly set.1.When servicing the high voltage system,remove the static charge by connecting a 10 kohm resistor in series with an insulated wire(such as a test p robe)between the chassis and the anode lead.2.If the HV VR requires adjustment,(a)R ep lace the VR and adjust the high voltage to the sp ecification,(b)Use a soldering iron to melt the adjustment cap on the HV VR to p revent any movement.3.When troubleshooting a monitor with excessively HV,avoid being unnecessarily close to the monitor.Do not op erate the monitor for longer than is necessary to locate the cause of excessive voltage.4.High voltage should always be kep t at the rated value,no higher.Only when high voltage is excessive are X-rays cap able of p enetrating the shell of the CR T,including the lead in glass material.Op eration at high voltages may also cause failure of the CR T or high voltage circuitry.5.When the HV regulator is op erating p rop erly,there is no p ossibility of an X-ray p roblem.Make sure the HV does not exceed its sp ecified value and that it is regulating correctly.6.T he CR T is esp ecially designed to p rohibit X-ray emissions.T o ensure continued X-ray p rotection,rep lace the CR T only with one that is the same or equivalent typ e as the original.7.Handle the CR T only when wearing shatterp roof goggles and after comp letely discharging the high voltage anode.8.Do not lift the CR T by the neck.1-1-2 Fire and Shock Hazard:Before returning the monitor to the user,p erform the following safety checks:1.Insp ect each lead dress to make certain that the leads are not p inched orthat hardware is not lodged between the chassis and other metal p arts in the monitor.2.Insp ect all p rotective devices such as nonmetallic control knobs,insulating materials,cabinet backs,adjustment and comp artment covers orshields,isolation resistor-cap acitor networks,mechanical insulators,etc.3.Leakage Current Hot Check(Figure 1-1):WAR NING:Do not use an isolation transformer during this test.Use a leakage current tester or a metering system that comp lies with American National Standards Institute(iNSI C101.1,Leakage Current for Ap p liance and Underwriters Laboratoriesl(JL Publication UL1410,59).74.With the unit comp letely reassembled,p lug the AC line cord directly into a 120V AC outlet.With the unit s AC switch first in the ON p osition and then OFF,measure the current between a known earth ground(metal water p ip e,conduit,etc.)and all exp osed metal p arts,including:metal cabinets,screwheads and control shafts.T he current measured should not exceed 0.5 milliamp.R everse the p ower-p lug p rongs in the AC outlet and rep eat the test.1-1-4 Product Safety NoticesSome electrical and mechanical p arts have sp ecial safety-related characteristics which are often not evident from visual insp ection.T he p rotection they give may not be obtained by rep lacing them with comp onents rated for highervoltage,wattage,etc.Parts that have sp ecial safety characteristics are identified by on schematics and p arts lists.A substitute rep lacement that does not have the same safety characteristics as the recommended rep lacement p art might create shock,fire and/or other hazards.Product safety is under review continuously and new instructions are issued whenever ap p rop riate.Comp onents identified bya on schematics and p arts lists must be sealed by a soldering iron after rep lacement and adjustment.CSH7839L/CSH9839L1-11 Precautions1-2 Servicing PrecautionsWAR NINGl:First read the“Safety Precautions“section of this manual.If unforeseen circumstances create conflict between the servicing p recautions and safety p recautions,always follow the safety p recautions.WAR NING2:A high voltage VR rep laced in the wrong direction may cause excessive X-ray emissions.WAR NINGS:An electrolytic cap acitor installed with the wrong p olarity might exp lode.1.Servicing p recautions are p rinted on the cabinet,and should be followed closely.2.Always unp lug the unit s AC p ower cord from the AC p ower source before attemp ting to:(a)remove or reinstall any comp onent or assembly,(b)disconnect PCB p lugs or connectors,(c)connect all test comp onents in p arallel with an electrolytic cap acitor.3.Some comp onents are raised above the p rinted circuit board for safety.An insulation tube or tap e is sometimes used.T he internal wiring is sometimes clamp ed to p revent contact with thermally hot comp onents.R einstall all such elements to their original p osition.4.After servicing,always check that the screws,comp onents and wiring have been correctly reinstalled.Make sure that the area around the serviced p art has not been damaged.5.Check the insulation between the blades of the AC p lug and accessible conductive p arts(examp les:metal p anels,inp ut terminals and earp hone jacks).6.Insulation Checking Procedure:Disconnect the p ower cord from the AC source and turn the p ower switch ON.Connect an insulation resistance meter(500 V)to the blades of the AC p lug.T he insulation resistance between each blade of the AC p lug and accessible conductive p arts(see above)should be greater than 1 megohm.7.Never defeat any of the+B voltage interlocks.Do not ap p ly AC p ower to the unit(or any of its assemblies)unless all solid-state heat sinks are correctly installed.8.Always connect a test instrument s ground lead to the instrument chassis groundbeforeonnecting the p ositive lead;always remove the instrument s ground lead last.1-3 Electrostatically Sensitive Devices(ESD)PrecautionsSome semiconductor(solid state)devices can be easily damaged by static electricity.Such comp onents are commonly called Electrostatically Sensitive Devices(ESD).Examp les of typ ical ESD devices are integrated circuits and some fieldeffect transistors.T he following techniques will reduce the incidence of comp onent damage caused by static electricity.1.Immediately before handling any semiconductor comp onents or assemblies,drain the electrostatic charge from your body by touching a known earth ground.Alternatively,wear a discharging wriststrap device.T o avoid a shock hazard,be sure to remove the wrist strap before ap p lying p ower to the monitor.2.After removing an ESD-equip p ed assembly,p lace it on a conductive surface such as aluminum foil to p revent accumulation of an electrostatic charge.3.Do not use freon-p rop elled chemicals.T hese can generate electrical charges sufficient to damage ESDs.、4.Use only a grounded-tip soldering iron to solder or desolder ESDs.5.Use only an anti-static solder removal device.Some solder removal devices not classified as“anti-static”can generate electrical charges sufficient to damage ESDs.、6.Do not remove a rep lacement ESD from its p rotective p ackage until you are ready to install it.Most rep lacement ESDs are p ackaged with leads that are electrically shorted together by conductive foam,aluminum foil or other conductive materials.7.Immediately before removing the p rotective material from the leads of a rep lacement ESD,touch the p rotective material to the chassis or circuit assembly into which the device will be installed.Caution:Be sure no p ower is ap p lied to the chassis or circuit and observe all other safety p recautions.8.Minimize body motions when handling unp ackaged rep lacement ESDs.Motions such as brushing clothes together,or lifting your foot from a carp eted floor can generate enough static electricity to damage an ESD.9.A Indicates ESDs on the Schematic Diagram in tFis manual.1-2CSH7839L/CSH9839L2 Reference Information2-1 List of Abbreviations,Symbols and Acronyms2-1-1 AbbreviationsAbbreviationDefinitionASS YAssemblyBBlueB+ADJB+AdjustmentB-CUTBlue-CutoffB-GAINBlue GainBR IGHTBrightnessCR-Comp ositionC-MICCondenser Microp honeCLKClockCMR-CementCNConnectorCONTContrastD-SUBD-SubminiatureEEP-CLKElectrically Erasable andProgrammable ClockEX TExternalEX T-MICExternal Microp honeFreq.FrequencyFUFusibleGGreenG-CUTGreen-CutoffG-GAINGreen GainGNDGroundHHorizontalHHeaterH-DR VHorizontal DriveH-DYHorizontal Deflection YokeH-FLBHorizontal FlybackH-FVHorizontal-Feedback VoltageH-LINHorizontal LinearityH-POSIHorizontal PositionH-SIZEHorizontal SizeH/PHONEHeadp honeHzHertzl-SENSECurrent-SenselbPoundMAXMaximumMICMicrop honeMINMinimumMPC-Metalized PolyesterMPP MetalPolyp rop yleneMOR-Metal OxideAbbreviationDefinitionOSCOscillatorPC-PolyesterPAR AParabolaPAR ALLParallelogramPIN-BALPincushion BalancePR E-AMPPre-Amp lifierPSIPower Savingl(susp end)PS2Power Saving2(off)PWRPowerRR edR-CUTR ed-CutoffR-GAINR ed GainR STR esetS-PINSide PincushionS-R AST ERSelf R asterS/WSwitchSCAPS Correction Cap acitorSPKSp eakerSYNCSynchronizationTC-T antalumT RT ransistorT R APT rap ezoidU-COMMicrop rocessorVVerticalV-DYVertical Deflection YokeV-FLBVertical FlybackV-LINVertical LinearityV-MUT EVideo MuteV-OUTVertical Outp utV-PAR AVertical ParabolaV-POLV-PolarityV-POSIVertical PositionV-SENSEVoltage-SenseV-SIZEVertical SizeWWR-Wire WoundX-T ALCrystalCohmKQ1000 ohmMC1000 出uFmicrofarad 国nFnanofa rad 倒p Fp icofarad 住存)CSH7839L/CSH9839L2-12 R eference Information2-1-2 Symbolsg Can emit X-radiation-Hot Ground力 Cold Ground金 Electrostatically Sensitive Device(ESD)Provides sp ecial safety considerations2-1-2 AcronymsAcronymDefinitionAcronymDefinitionABLAutomatic Brightness LimitsH/VHorizontal/VerticalACAlternating CurrentHVHigh VoltageACLAutomatic Contrast LimitI/OInp ut/Outp utAFCAutomatic Frequency ControlICIntegrated CircuitANSIAmerican National Standards InStitlLfiLight Emitting DiodeCMOSComp lementary Metal OxideMACMacintoshSemiconductorMOFAMask Outside Frame AssemblyCR TCathode R ay T ubeOCPOver Current ProtectionDCDirect CurrentOPAMPOp erational Amp lifierDDCData Disp lay ChannelOSDOn Screen Disp layDFDynamic FocusP-PPeak to PeakDMMDigital MultimeterPCBPrinted Circuit BoardDPMSDisp lay Power Management Sigr川丽Phase Locked LoopDVMDigital VoltmeterPWMPulse Width ModulationDYDeflection YokeSMPSSwitch Mode Power Sup p lyEEPR OMElectrically Erasable andSVGASup er Video Grap hics ArrayProgrammable R ead only Memo SWEDACESDElectrostatically Sensitive Devic?T PT est PointESFElectronic Static FieldULUnderwriters LaboratoriesFBTFlyback T ransformerUSBUniversal Serial BusFETField Effect T ransistorVESAVideo Electronics StandardFHHorizontal FrequencyAssociationFSFail SafeVGAVideo Grap hics ArrayFVVertical FrequencyVRVariable R egisterGDGeometric DistortionW/BWhite Balance2-2CSH7839L/CSH9839L3 Product Specifications3-1 SpecificationsItemDescrip tionPicture T ube:19-lnch(48.2 cm):18-inch(45.7 cm)viewable,17-lnch(43 cm):16.0-inch(40.0.26 mm Dot p itch,Full-square flat-face tube,90 Deflection,Anti-R eflection coating with Anti-electrastatic,Medium short p ersistence p h)cm)view)sp horScanning FrequencyHorizontaBO kHz to 96 kHz(Automatic)Vertical:50 Hz to 160 Hz(Automatic)Disp lay ColorsUnlimited colorsMaximum R esolutionHorizontal600 DotsVertical:1200 LinesInp ut Video SignalAnalog,0.714 Vp-p p ositiv伞ti筋ernally terminatedInp ut Sync SignalSep arate Sync T T L level p ositive/negativeComp osite SyncT T L level p ositive/negativeSync-on-Green Comp osite sync 0.286 Vs/ntegative(Video on Vp-p p ositiveMaximum Pixel Clock rate205 MHzActive Disp layCSH9839L;Horizontal:3523immfn4：4:3 ratio)/330 rBrnmdi(5:4 ratio)Vertical:264 mr9 imCSH7839L;Horizontal:3063mnnmd(4:3 ratio)Vertical:230 mr3 imInp ut VoltageAC 90 to 264 Volts,60/50 mPower Consump tion130 Watt(max)DimensionsCSH7839LCSH9839LUnit(WxDxH)Carton(W x D x H)16.3x17.5x17.2 Inches(415 x 445.7 x 4321x22.3x21.6 Inches(535 x 566 x 549 m7J38ntoi)6x19 Inches(468 x 499 x 483.n2)2.6x23.2x22.8 Inches(573 x 590 x 582 mm)0 mm)Weight(Net/Gross)CSH9839L;49.6 lbs(22.5 kg)/58.8 lbs(26.7 kg)CSH7839L;40.8 lbs(18.5 kg)/49.6 lbs(22.5 kg)Environmental ConsideraOcp iesating T emp eraturB2F to 104F(0 to 40)Humidity:10%to 80%Storage T emp erature-4F to 113F(-20 to 45)Humidity:5%to 95%CSH7839L/CSH9839L comp lies with SWEDAC(MPR II)recommendations for reduced electromagnetic fields.Designs and sp ecifications are subject to change without p rior notice.CSH7839L/CSH9839L3-13 Product Sp ecifications3-2 Pin Assignments SyncT yp e Pin15-Pin Signal Cable Connector(Figure 3-1)Cable Adap ter(Figure 3-2)MacintoshSep arateComp osite1R edR edGND-R2GreenGreenR ed3BlueBlueH/VSync4GNDGNDSense 05DDC R eturnDDC R eturnGreen6GND-RGND-RGND-G7GND-GGND-GSense 18GND-BGND-BR eserved9R eservedR eservedBlue10GND-Sync/Self-raster GND-Sync/Self-raster Sense 211GNDGNDGND12DDC DataDDC DataV-Sync13H-SyncH/V-SyncGND-B14V-SyncNot UsedGND15DDC ClockDDC ClockH-SyncOQO/i x /0 0 0/O0O i Q O O /Figure 3-1.Male T yp eBNC ConnectorsBNC connectors are used with coaxial cable for imp roved signal transmission.Better signal transmission becomes critical at high frequencies,such as those required for 1280 x 1024 resolution.Most video boards that op erate at 1280 x 1024 resolution recommend using coaxial cable with BNC connectors.T he 5 BNC connectors on the rear of the monitor can accep t R ed,Green and Blue video.Comp osite sync can be ap p lied sep arately,or combined with the Green video signal(commonly referred to as comp osite sync-on green).If comp osite sync-on-green is used,then only 3 of the 5 BNC connectors are usedT he connectors are labeled accordingly.Figure 3-2.Male T yp ePin AssignmenSignalsSync-on-GreenComp osite SynSep arate Syr1R edR edR ed2Green+Sync GreenGreen3BlueBlueBlue4NCH/V Comp.Sync H-Sync5NCNCV-SyncFigure 3-3.BNC Signal Inp utT yp e3-2CSH7839L/CSH9839L3 Product Sp ecifications3-3 Timing ChartT his section of the service manual describes the timing that the comp uter industry recognizes as standard for comp uter-generated video signals.T able 3-1.T iming Chart(CSH7839L)ModeIBMVESAMAC.T imingsVGA2/70 H 720 x400VGA3/60 H640 x 480Z640/85 H640 x 480:800/85 H800 x 6001024/75 卜1024 x 76；力024/85 H 31024x76(1024/100H024x76住280/75卜 9280 x10：4280/85 H 4280 x102Z832/75 H.4832x624fH(kHz31.46931.46943.26953.67460.02368.67781.40079.97691.14649.726A|isec31.77831.77823.11118.63116.66014.56112.28512.50410.97120.110B|isec3.8133.8131.5561.1381.2191.0160.9881.0671.0161.117C|isec1.9071.9073.8102.7022.2