NAD-4300-tun-sm 维修电路原理图.pdf

NADSERVICE_MANUAL-aMONITORSERIES4300STEREOTUNERRadioFans.CN 收音机爱 好者资料库CNAD4300SERVICEMANUALNOTE:This manual coversallversions.A:U.S.A.Al:CanadaB:U.K.Bi:AustrahaC:EUROPEandothersCl:W-GermanyTABLEOFCONTENTSPAGELOCATIONMAP2SPECIFICATION3INTERNALVIEW4SUGGESTED INSTRUMENTATiONHOOKUP5FMALIGNMENTS6-9AMALIGNMENTS101lWIRiNG DiAGRAM12-13P.C.B.LAYOUTDIAGRAM1415SCHEMATICDIAGRAM16-17EXPLODEDVIEWPARTSLIST18-19EXPLODEDVIEW20ELECTRICALPARTSLIST21-23RadioFans.CN 收音机爱 好者资料库AMTuner SectionUsablesensitivity.Selectivity.Imagerejection.Mono,30dBTHDN:Mono,50dBS/N:Stereo,50dBS/N:Mono,60dBS/N:Stereo,60dBS/N:Alternatechannel:Adjacentchannel:Mono:Stereo:Mono:Stereo:AllversionsexceptUSA.50sec.de-emphasis0.83tV1.3V14.5,uV3.2tV48IN250jIV/meter.55dB.at9kHz45dB.USAversiononly.75isec.0.8.zV1.OpVl3pV2.51iV42iN43.5x8.7x29.3cm.17.1x3.4x11.51n.4.55 Kg./lOIb.5.75Kg.112lb.10 oz.50/60Hzat110, 120,220or240VAC.24W.REARPANEL1.AMRodAntenna5.OutputJacks.2.AMAntennaTerminals.6.ACConvenienceOutlet(notinU.K.model).3.FMAntennaInput.7.ACLineCord.4.OutputLevel Control.0C312SPECIFICATIONSFMTunerSectionInputsensitivity(3002)Capture ratio at25,45&65dBf.AMrejection.SelectivityImagerejection.R.F.intermodulation.I.F.rejection.SCArejection.Pilotsuppression(19+38kHz).THDat100%modulation,S/Nratio,A-weighted, 65dBf.Frequencyresponse,15-15kHz.Stereo separation(FMNRoff),FRONTPANEL1.Power.2.StationPre-sets.3.MemoryEnter.4.TuningDisplay.5.FMStereoIndicator.6.IFNarrowIndicator.45767.AM/FM.8.IFNarrow.9.FMNROft.10.Mono.11. Tuning.70dB.76dB.8dB.110dB.73dB.102dB.80dB.69dB.1kHz0.08%0.07%84dB.77dB.100Hz-6kHz0.15%0.35%70rIB.76dB.8dB.110dB.73dB.102dB.80dB.72dB.1kHzlOOHz-6kHz0.07%0.15%0.05%0.35%85dB.78dB.0.5dB.50dB.35dB.250jIV/meter.()60dB.at10kHz45dB.0.5dB.1kHz:50dB.3OHz-l5kHz:35dB.NADtuNiNGMonriorSenesStereoTuner 4300rIErueseILJ.IIIOMSTENE.)FMNARFOWOFF.o;LL_-IFNA000WPhysicalSpecificationsDimensions(widthxheightxdepth)NetweightShippingweightPowerrequirements11234567891011()3INTERNALVIEW40()FMALIGNMENTNECESSARY INSTRUMENTATIONFMGenerator(lessthan0.05%THD.)StereoModulator(lessthan;0.05%THD.,more than50dBSep.)AudioGenerator(notnecessayifFMGeneratorhasbuilt-insweep,e.g.,SOUNDTECHNOLOGYST 1000AandSTiO2OA)ACVTVMs(oronewithaLeftRightswitch)THDAnalyzer(resolutionlessthan0.1%)Oscilloscope(5mVorbettersensitivity,Xinputcapability)FrequncyCounterVOMorDMM(highimpedance,mustreadinmV)75ohmDummyAntennaIMPORTANT1)Beforealignments commence,releaseIFNARROWandMONOswitches(out),SwitchFM NRoff(in).2)IFFMGeneratorisnotsynthesizer-type,besureto checkitsfrequencywithFREQcounterwhen adjustingdetectorandmultiplexdecodercircuits.A.SYNTHESIZER FREQUENCY1.ConnectFrequencyCounter betweenTP-104andground.2.Tune to98MHz(NoREinputneeded).3.AdjustC-201sothatthelocaloscillatorfrequency shownbythe frequencycounter reads108.700MHz.TOLERANCE:108.700MHz+/2KHzB.FRONT-ENDALIGNMENTSAlignmentofthefront-end shouldonlybenecessaryafterrepairtothefront-endorcrystaloscillatorcircuits.a)TUNINGVOLTAGEItisessentialtochecktuning voltagebeforealigningtherestoffront-end.1.ConnectDMMbetweenTP-105andground.2.Tune to88MHz,andadjustL-6ifthe voltageisincorrect.TOLERANCE:3.6V+/0.5V.3.Tuneto108MHzandconfirmthatthe voltageiswithinthefollowingspecification.SPECIFICATION:21-25V.b)TRACKING1.ConnectFMGenerator(150KHzsweep,100Voutput)to75ohmantennainputand Detector ProbetoPin1ofIC102withgroundtothe tunershield.2.Settunerto106MHz,entorintoPreset8,andtunethegeneratorsothatcurveappearsonOscilloscope.3.AdjustC-2,C-9,C-liandC-14formaximumcurveheightonthe oscilloscopewhilereducingRFinputtokeepentirecurveondisplay.4.Settunerto90MHz,enterintoPreset1,andtune thegeneratorsothatcurveappearsontheoscilloscope.5.AdjustL-1, L-2,L-3andL-4formaximumcurveheight.6.Repeatabovesteps2, 3,4and5(usePreset1and8) tillbothfrequenciesareatmaximumcurveheight.SUGGESTED INSTRUMENTATIONHOOKUPoOSCILLOSCOPEFMGENERATORAUDIOOSC100IUSEONL?IFFMGENERATORWITHBUILT-INSWEEPUNAvAILABLEIWITHBUILT-INSWEEPlE: ST1000ADISTORTION METERI1DISTORTIONOUTPUTSCHEMATICDIAGRAMOFDETECTORPROBECl02330p00o4.00Diodesshouldbepoint-contactFROMOUTgermanium;SomecommonlyTUNERCTOscocavailabletypesare:0A800A81AA1191N601N341N22PICTORIALDIAGRAMOFDETECTORPROBERiCENTERLEADTOPINICl02jjEEEESCOPEKeepleadsasshortaspossible,tominimizestraysignalpickup.ATFRONTEND56C.IFADJUSTMENT1.Settunerto98MHzapprox.(thetunermustbetunedtoanunoccupiedfrequency),andtuneFMGeneratortodisplayacurveonOscilloscope.2.AdjustL-5andL-101formaximumandsymmetricaloutputcurveonthe oscilloscopedisplay,using aslittleinput aspossible.D.DETECTORALIGNMENT1.Disconnect Detector Probefromtunerand Oscilloscope,andconnecttuneroutputtothe oscilloscopeandDistortionAnalyzer.2.ConnectDMMacrossTP-101()andTP-102(+).3.Tune to98MHzandfeed1mVfromFMGenerator(Modulate1KHz100%)to75ohmantennainput.4.AdjustL-102SecondaryforlowestTHD.SPECIFICATION:lessthan0.12%(inMONO).5.AdjustL-102PrimaryforOVreadingonDMM.TOLERANCE:+15OmV.6.Repeatabovesteps4& 5tillnofurtherimprovements.E.SIGNALMETERLEVEL1.Tuneto98MHzandfeed5VfromFMGeneratorto75ohmantennainput.2.AdjustR-127sothatthesecondLEDofsignalstrengthindicatorisjustlitup.ocCC)006.CheckandconfirmthatseparationunderwideIFbandwidthiswithinthefollowingspecification.SPECIFICATION:morethan50dB.7.SwitchIFNARROWbutton(in),andmodulateLeft(orRight)channelonly.AdjustR-403forminimumoutputonRight(orLeft)channelVTVMandoscilloscope.Iftheleakoutputsonopposite channelsaredifferent,readjustR-403sothatreadingsbecomesameinbothleftandrightchannels.8.Checkseparation undernarrowIFbandwidthand confirmitiswithinthefollowingspecification.SPECIFICATION:morethan40dB.H.FMNRCIRCUITConfirmthatFM NRbuttonisatOFFposition(in),atfirst.1.Tune to98MHzandfeed1mVwith100%modulationinto75ohmantennainputandsetreferenceforS/Nmeasurement.Withreferenceset,cancellthe stereomodulation andleavepilottoneonly.2.AdjusttheattenuatorofFMGeneratorsothatS/Nratioreads50dB.3.SwitchFMNRon,andadjustR-148sothatS/Nisimprovedby8dB.4.SwitchFMNRoff,andadjustattenuatorofFMGeneratorsothatS/Nratioreads60dB.5.SwitchFMNRon,andconfirmthatS/Nisimprovedbyapprox.2dB.F.STEREOSWITCHINGTHRESHOLD1.ModulateFMGenerator1KHz100%Leftonly,pIus19KHzpilot8-10%.2.IncreaseFMGeneratorlevelupwardsfrom0andadjustR-126sothat stereolightturnsonandaudiooutputs,aswatchedonVTVMsand Oscilloscope,switchestoonechannelonlyat5Vinputlevel.TOLERANCE:+3V.Notethat,whenturninginputleveldown,theunitwillswitchintomonoatalowerlevel,typically3.5pV.G.STEREODISTORTION AND SEPARATION(WIDE/NARROWIFBANDWIDTH)1.Tuneto98MHzandfeed1mVfromFMGeneratorto75ohmantennainput.2.ModulateLeft(or Right)channelonly,andadjustL-5andL-101slightly,sothatthedistortiononLeft(or Right)channelbecomesminimum.3.Checkdistortionatstereooperation underwideIFband-width.SPECIFICATION:lessthan0.12%,stereoL+R.lessthan0.08%,stereoLonly.lessthan0.08%,stereoRonly.lessthan0.08%,stereoLR.4.Next,switchIFNARROWbutton(in)andcheckdistortionunderstereosignalinput.SPECIFICATION:lessthan0.8%,stereoLonly.lessthan08%stereoRonlylessthan0.8%,stereoL-R.5.ResetIFbandwidthtowidepositionagainandmodulateLeftchannelonly.AdjustR-141forminimumoutputonRightchannelVTVMandoscilloscope.Next,modulateRightchannelonlyandadjustR-141forminimumoutputonLeftchannelVTVMandoscilloscope.Iftheleakoutputsonopposite channelsaredifferent,readjustR-141sothat readingsbecomesameinbothchannels.OC.O00)078eC9L3L6L2CliL51LiOlIR403I1C102I(UNDERTHELIFB/WP.C.PC2010TP1O5.eIR127TP1O1TP1O2L102sR148LlO2Rl26Rl41TP4049AMALIGNMENTSOSCILLATOR.1ConnectDMMtoTP-103andground.2Tuneto1710kHz.Enterinto preset1.AdjustC-158forreadingof310.5VDC.3Tuneto520kHz.Enterintopreset2.AdjustL-105forreadingof1.80.1VDC.4Repeatabovesteps2and3untilwithintolerances.ANTENNA,IF1Swingantennaawayfromchassis.2ConnectDCvoltmetertocentertap,R-210andground.3Tuneto stationofmoderate strength,near600kHz.EnterintoPreset3.AdjustL-901formaximumreadingonmeter(Usenon-interactivetool,suchasplasticorwoodenstick).4AdjustL-106andL-107formaximumreadingonmeter.5Tune toastationof moderatestrengthnear1400kHz.EnterintoPreset4.AdjustC-153formaximumreading onmeter.6Repeatabovesteps3and5untilnofurtherimprovementisseen.9kHz,10kHz WHISTLEFILTERS1Tunetoaquietspot(aclearfrequency).2Connectaudiooscillatortobase,Q-112(isolatewith0.1-1.0iiFcapacitor).3ConnectACVTVM(orScope)toR-220andground.4Setaudiooscillatorto10kHz(50Hz)1V.AdjustFL-104forminimummeterreading.5Setaudiooscillatorto9kHz(50Hz)1V.Adjust FL-105forminimum meterreading.DSIGNALMETER1Tuneto1,000kHzandfeed 2.5mVtotheantennaterminals.2AdjustR-210sothatthe fifthLEDofsignalstrengthmeterlightsup.0ABCL901L107CC0L106Q112FL1O4FL1O5R220C153C158TP1O3R210in11(0WIRINGDIAGRAM(A&AlVersions,120VACwithACoutlet)4:I(4AMBAR ANTENNAANTENNAThRMINAI.RECEPTACLEIFB/wSELECTORP.C.B(000IA)POWERTRANSFORMERJiosPOWERCORDROTARY SENSORP.C.BNOOA)VOLTAGESELECTOR(ZOO4AIPOWERINDICATORP.C.R(M1O8A)LEDDISPLAYP.C.B(0013A)PRESET SELECTORP.C.B(SOS5A)POWERSWITCH1213_.I-i*WIRINGDIAGRAM(B,Bi,C&ClVersions,220/240VAClessACoutlet)AMBARANTENNAANtENNATERP.ENAL,SSIFB/wSELECTORP.C.B(0001A)POWERTRANSFORMER“OsROTARYSENSORP.C.B(NOO1A)VO4TAGESELECTORIZOO4A)IPOWERiNDICATORPC.B(M1ORA)LEDDISPLAYPC.B(DOISA)POWERCORDPRESET SELECTORP.C.B)S085A)POWERSWITCHP.C.B.LAYOUT DIAGRAMFMFRONTENDP.C.B.ASSY(F1O9A)IFB/WSELECTORP.C.B.ASSY(0001A)r01-.-5_IMII1IItEl-I-IVOLTAGESELECTORP.C.B.ASSY(ZOO4A)r2*Iliiovri_I:2OVI220VI240VIPOWERINDICATORP.C.B. ASSY(M1O8A)ROTARY SENSORP.C.B.ASSY(NOOlA)r?2-222o-0TTUNERP.C.B.ASSY(1024A)Q-L9rLEDDISPLAYP.C.B.ASSY(DO13A)i_o33iiiittijw=-PRESETSELECTORP.C.B.ASSY(S085A)I01415SCHEMATICDIAGRAMNAD4300TUNERMARXOFRESI5100EliSEBLEC114Ws12wMARKOFCAPACITOR)ELECT.)LOWLEAKFILMIISAL90111.5101(C(I(CEISA,;.J4*J0_SIE55O(:_:IDO13A6ClAPTABOOPAPIllIj_RT2RT3A1617163-6280-0-0262-1111-0-0362-1111-1-0462-3480-0-0563-5170-0-0662-1110-0-0762-1110-1-0862-2320-0-0992-2103-0-01171-2625-0-01271-2622-0-01371-2621-0-01471-2623-0-01571-2619-0-071-2620-0-01671-1912-0-01771-3111-0-02011-5121-0-02123-1327-0-023-1327-3-023-1327-2-023-1327-1-02285-258-0-085-260-0-085-240-0-085-259-0-085-235-0-0AMBARANTENNAPOWERTRANSFORMER(A)POWERTRANSFORMER(Al)POWERTRANSFORMER(B,Bl)POWERTRANSFORMER(C,Cl)POWERCORD(A)POWERCORD(Al)POWERCORD(B)POWERCORD(81)POWERCORD(C,Cl)370001A381024A38-181-2334-0-038-274-3111-0-038-374-3112-0-038-541-689-0-039Pt8o(q/WASHER(TOOTHEDLOCKB10)WASHER(PLAIN9-14-0.5)(1)EXPLODEDVIEWPARTSLISTRef.No.PartsNo.DescriptionFRONTPANELPUSH BUTTON-SELECTORS(BLACK)PUSHBUTTON-ON/OFF(GREEN)PUSH BUTTONFRAME-SINGLEHOLETUNERWINDOWPUSHBUTTON-MEMORY(BLACK)PUSHBUTTON-ENTER(RED)TUNINGKNOBFOOT1063-1844-0-0LABEL:THISISNOTAHANDLERef.No.PartsNo.DescriptionFRONTCHASSISSIDECHASSIS(USIDECHASSIS(R)SUBCHASSIS(FRONTTOREARSUPPORT)REARPANEL(A,Al)REARPANEL(B,Bl,C,Cl)LEDINTERRUPTERCABINETCCIF8/wSELECTORP.C.B.ASSEMBLYTUNERP.C.B.ASSEMBLYFUNCTIONSWITCHBANK(4SWITCHES)HEATSINKHEATSINK38-482-2130-0-0RCACONNECTOR-SINGLEROTARYPOTENTIOMETER-OUTPUTLEVELCONTROLFMFRONTENDP.C.B.ASSEMBLY40TAPPINGSCREW(PHILLIPSHEAD3x6BLK)41TAPPINGSCREW(PHILLIPS HEAD3x8BLK)1871-3110-0-0BOTTOMCOVER1971-1892-0-0BRACKET-OUTPUTLEVELCONTROL42434445464748495051MACHINESCREW(PHILLIPSHEAD3x6BLK)TAPPINGSCREW(PHILLIPSHEAD3x6Cr)TAPPINGSCREW(WASHERHEAD3x6Cr)MACHINESCREW(PAN3x6Cr)MACHINESCREWS(WASHERHEAD3x6Cr)MACHINESCREW(WASHERHEAD3x6Cr)MACHINESCREW(PHILLIPSHEAD3x6)TAPPINGSCREW(PHILLIPS HEAD3x8Cr)CABINETSCREWWITHWASHER(4x6 BLK)TAPPINGSCREW(FLATHEAD3x6Cr)52OUTPUTCONTROLNUT (HEXAGON9-11-2)53HEXAGONFLANGENUT(4-7-4.2)54HEXAGONNUT(10-14-2)55562362-3332-0-0BUSHING-ACPOWER CORD/AMANTENNA2463-1843-0-0LABEL-CAUTIONFORFUSE(A,Al)2563-1872-0-0MASKINGPLATE2687-289-0-0TUNING SHAFT2787-3247-0-0HEXAGONSTUD2887-3251-0-0P.C.B.SUPPORT2982-2171-0-0AMANTENNATERMINAL29-187-3249-0-0PLASTICRIVET3082-2161-0-0RECEPTACLE(A,A1)3181-2320-0-0POWERSWITCH32M1O8APOWERINDICATORP.C.B.ASSEMBLY33S085APRESETSELECTORP.C.B.ASSEMBLY33-171-1911-0-0LEDGUIDE33-281-2336-0-0MEMORYSWITCHBANK(8SWITCHES)33-381-2335-0-0ENTERSWITCH34DO13ALEDDISPLAYP.C.B.ASSEMBLY34-1SL-5653LEDINDICATOR35ZOO4AVOLTAGESELECTORP.C.B.ASSEMBLY36NOO1AROTARYSENSORP.C.B.ASSEMBLY36-1TLP8O1PHOTOINTERRUPTER1819LULU0-J0 xLU0CN0ELECTRICALPARTSLISTNOTE:ThisisnotacompleteelectricalpartsIst.POWERINDICATORP.C.B.ASSEMBLY:M1O8A(EXPLODEDVIEWREF.NO.32)SYMBOLNO.PARTSNO.DESCRIPTIONSD909SLP246BLED(GREEN)PRESETSELECTORP.C.B.ASSEMBLY:S085A(EXPLODEDVIEWREF.No. 33)SYMBOLNO.PARTSNO.DESCRIPTIONSD901-D908LN349GPHLED(GREEN)LEDDISPLAYP.C.B.ASSEMBLY:DO13A(EXPLODEDVIEWREF.NO.34)SYMBOLNO.PARTSNO.kD301TD63O1AP2SC18152SA1015SL-5653LN449YPH0301,Q3020303-LED3O1D301, D302DESCRIPTIONSINTEGRATEDCIRCUITTRANSISTOR0C)0000LEDINDICATORLED(AMBER)VOLTAGESELECTORP.C.B.ASSEMBLY:ZOO4A(EXPLODEDVIEWREF.NO.35)SYMBOLNO.PARTSNO.DESCRIPTIONSR9022.7Mc,1/2WCARBONRESISTORROTARYSENSORP.C.B.ASSEMBLY:NOO1A(EXPLODEDVIEWREF.NO.36)SYMBOLNO.PARTSNO.DESCRIPTIONSP1901,P1902TLP8O1APHOTOINTERRUPTERIFBIWSELECTORP.C.B.ASSEMBLY:QOO1A(EXPLODEDVIEWREF.NO. 37)SYMBOLNO.PARTSNO.DESCRIPTIONSIC4O1TA7O6OAPINTEGRATEDCIRCUITIC402LA1222Q4012SC1815TRANSISTORD401-D4031SS241DIODER40341-791VARIABLERESISTOR,5K-BCF4O1-CF40319-159(SFE10.7MZ2K-A)CERAMICFILTERCF40419-157(SFE1O.7MLK-A)21CTUNERP.C.B.ASSEMBLY:1024A(EXPLODEDVIEWREF.NO.38)SYMBOLNO.IC1O1IC1021C1031C104,IC1111C105, 1C108IC109IC1101C112CR3,1C1141C1151C1161C1171C1181C119cQ101,0102Q103,0104,0107,01120115,0116,0120,Q1210122,Q123,01240105,Q114,0117,0118Qi09QuO,0111,01130119DiOl,D102, D103,D104D105-D107,Dili-D115D118-D122,D125DuODl 24Di26D127, D129, D130,D132D128,D131Li01L102Li04Li05Li06Li07Ci03,C125, C173,Ci89Ci26,Ci27Ci53Cl58Ci87Cl 88Ci 96C201C228PARTSNO.LA1235LA1222LA3401uPC4558CuPC4570CLA1245TD6104PTC9147BPTC4O11BPLB1450BA61O478M05A79M12A78M12A2SA10152SK3OA2SK212DS442BTKV1226YGZA11ZGZA36XSRiKDBA1OB13-53313-536-i-015-167i2-56413-34713-34850V,0.22uFSOV,luF36-13336-13450V,0.33uF50V,0.1uF5.5V,0.047F36-136FMDETECTORCOILCHOKECOIL,l2OuHAMOSCCOILlETCOIL(455KHz)450KHzMATCHINGCOILELCTROLYTICCAPACITORLOWLEAKAGETRIMMERCAPACITOR,2-7pF3-iipFELECTROLYTICCAPACITORLOWLEAKAGEMEMORYBACKUPCAPACITORTRIMMERCAPACITOR,5.2-3OpF1SV55ii-43711-43811-43911-44013-53912-56515-i6615-17236-13482-2i6282-2174DIODEFMANTENNACOILFMRFCOILIFTCOILOSCCOILCHOKECOIL,iOuH0.56uHTRIMMER CAPACITOR,3-11pFANTENNACONNECTOR,YKV11-0065(A,Al),YKV11-0096(B,C)R126R127,R141Ri48R2i0R28841-78841-78941-78741-79168f,1/4WDESCRIPTIONSINTEGRATEDCIRCUIT2SC929TRANSISTOR2SC1815eSYMBOLNO.PARTSNO.DESCRIPTIONSCuB50V,82pFCERAMICDISCCAPACITOR,FK11COG1HCF1O1, CF1O319-157CERAMICFILTER,SFE1O.7MLK-ACF1O419-140“,SFP45OHFLiOl19-146ANTIBIRDIEFILTERFL1O2, ELi0319-158LOWPASSFILTER,19KHz38KHzFL1O419-152“,10KHzFL1O519-153“,9KHzXTAL1O119-205CRYSTALOSCILLATOR,7.2MHzCR10119-156CERAMICRESONATOR,CSB456F11FU1O15TT400FUSE,125V,400mA(A,Al)173000FUSE, 250V,400mA(B,C)EU102,EU1035TT400FUSE,l25V, 500mA(A,Al)173000FUSE,250V,500mA(B,C)pFMFRONTENDP.C.B.ASSEMBLY:F(EXPLODEDVIEWREF.NO.39)SYMBOLNO.PARTSNO.DESCRIPTIONS1S188FMDIODEUIFT013SK114VTRANSISTOR02BF982032SC46104,052SC535BD1-D5LiL2L3L4L5L6L7L8C2,C9,Cii,Ci4J101VARIABLERESISTOR,i0Kf-B,2OKfl-B5Kf-B5OKfl-BFUSIBLERESISTOR22234wC.)oOIAi3LNINVdVCNIQ3LNIUdCitOWNAS9ICI