NAD-C730-rec-sm 维修电路原理图.pdf
NADSERVICE MANUALC 730STEREORECEIVERC 730STEREORECEIVERRadioFans.CN 收音机爱 好者资料库2SERVICE SAFETY PRECAUTIONS1.Replacing the fusesCAUTION: FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLYWITH SAME TYPE OF FUSE.Reference NoPart NumberDescriptionM151 *AH 5120-0037-0FU T3.15A 250V UL/CSA 5X20MMM152 *C 5100-2530-1BT2.5A/250V IECM154 *AH 5120-0052-0FUSE T1.6A 250V 5X20MM UL/CSANOTE: : USA, CANADIAN MODEL ONLY. : EUROPEAN MODEL ONLY.2.Safety check out(Only U.S.A. model)Before returning the product to the customer, make leakage current or resistance measurementsto determine that exposed parts are acceptably insulated from the supply circuit.Parts marked with the symbol are critical with regard to the risk of fire and electric shock.Replace only with parts recommended by the manufacturer.CONTENTSDESCRIPTIONPAGESPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4REAR PANEL / FRONT PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5DISASSEMBLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8ADJUSTMENT POINTS DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9INSTRUMENT SETUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10ALIGNMENT PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-11IMPORTANT NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11PCB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-14SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-19IC BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20-23ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24-33EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35-36PACKING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37RadioFans.CN 收音机爱 好者资料库3SPECIFICATIONSPOWER AMPLIFIER SECTION1.Rated Distortion(THD 20Hz-20KHz, 30W, 8 ohm)0.08%(THD 1KHz, 30W, 4 ohm)0.1%2.Input Sensitivity (ref. 30W 8 ohm, 1KHz)350+/-30mV3.S/N Ratio (A-wtd, 1K ohm, 500mV CD in, 1KHz)-85dB4.Frequency Response (500mV CD in, 1W, 20Hz-20KHz)00.8dB5.Channel BalanceVolume maximal output 30W (ref), 1KHz1dB1dB to -40dB, 1KHz2dB-41dB to -50dB, 1KHz3dB6.Audio Muting at 1KHz-52dB7.Headphone Output in 0.1% (600 ohm load, 500mV CD in, 1KHz)10V8.Crosstalk (2V input, 10W, 1KHz)-63dBPRE - AMPLIFIER SECTION1.Rated Distortion (THD, 2V CD input, 4V output, 1KHz)0.08%2.Frequency Response (500mV CD in, 20Hz-20KHz)00.08dB3.S/N Ratio (A-wtd, 500mV CD in, 1KHz)-85dB4.Tone Control ResponseBass (500mV in,1W out ,100Hz) boost / cut92dBTreble (500mV in,1W out ,10KHz) boost / cut92dBAM TUNER SECTIONFrequency Range:AH530 - 1710 KHzStep10 KHzC531 - 1602 KHzStep9 KHzInput level is expressed as the reading in open-circuitof 75-ohm source impedance signal generator.1.Usable Sensitivity (999/1000KHz)30dBV2.S/N Ratio (5mV input)38dB3.THD (5mV input)3%4.IF Rejection (450KHz)36dB5.Image Rejection (F+2xIF)28dB6.Selectivity17dB7.Output130mV26mV8.Loop Sensitivity (20dB S/N)999/1000KHz66dB603/600KHz66dB1404/1400KHz66dB9.Frequency Response (100-2.3KHz, 5mV)06dB4FM TUNER SECTIONFrequency Range:AH87.5 - 108 MHzStep50 KHzC87.5 - 108 MHzStep50 KHzInput level is expressed as the reading in open-circuitof 75-ohm source impedance signal generator.*C*AH1.Usable Sensitivity (Mono, 98MHz)15dB15dB2.S/N Ratio (60dB, IHF wtd)Mono72dB72dBStereo66dB66dB3.THD (60dB, L=R, 75KHz Dev. for AH, 40KHz Dev. for C)Mono0.3%0.3%Stereo0.35%0.35%4.IF Rejection (10.7MHz)78dB65dB5.Image Rejection (119.4MHz)85dB85dB6.Capture Ratio (40dB)3dB3dB7.AM Suppression (60dB, 100%mod FM, 30%mod AM)48dB48dB8.Pilot Suppression (60dB)60dB60dB9.Frequency Response(60dB, 20Hz - 15KHz in, 75S for AH, 50S for C and01.5dB01.5dBJapan)10. Channel Separation (60dB, IHF wtd)100Hz30dB30dB1KHz38dB38dB10KHz30dB30dB11. Alternate Channel Selectivity (400KHz, IHF)60dB45dB12. Muting Level183dB183dB13. Output750mV150mV500mV100mV14. Blend on Separation (60dB IHF wtd)62dB62dB15. RDS Decode Sensitivity26dB26dB16. Auto-search SensitivityOFF15dB15dBON24dB24dBPHYSICAL SPECIFICATIONSDimensions (Width x Height x Depth)435 x 109 x 305 mmNet weight7.2 kg (15.87 lbs)Shipping weight9.2 kg (20.5 lbs)5REAR PANEL / FRONT PANELREAR PANELFRONT PANEL1. POWER ON / OFF2. STAND-BY INDICATOR3. BLEND4. MEMORY5. FM MUTE / MODE6. AM / FM7. DISPLAY8. PRESET / TUNE9. PRESET / TUNE AND 10. DISPLAY AREA11. VOLUME12. HEADPHONE SOCKET13. INPUT SELECTORS14. BASS & TREBLE15. TONE DEFEAT16. BALANCE1. FM ANTENNA2. AM ANTENNA3. DISC INPUT4. CD INPUT5. VIDEO INPUT6. AUX INPUT7. TAPE 2 IN, OUT8. TAPE 1 IN, OUT9. PRE OUT10. NAD-LINK IN, OUT11. SOFT CLIPPING12. 12V TRIGGER OUT13. SPEAKERS14. AC LINE CORD15. SWITCHED AC OUTLET (AH version only)6DISASSEMBLY INSTRUCTIONS1. Remove machine screws M 4.0 x 6.0 ( 1 to 4 ) from the side panels.Remove tapping screw 3.0 x 8.5 ( 5 ) from the back panel.Refer to Figure No.1.Figure No.12. Pull both sides of the TOP COVER slightly outwards 6 and tilt approx. 35 and then removein the direction as indicated by the arrow 7 . Refer to Figure No.2.Figure No.2.543127667BLOCK DIAGRAMAM LOOP ANTFM ANTFRONT ENDENV172D3G1VFDProtectLRCPUKEY MATRIXTrigger OutREMOTESENSORCDDISCVIDEOAUXTAPE-1OUTTAPE-2OUTTC9273TAPE-2INPRE OUTTAPE-1IN (Mon)S111217PLLLC72723MAM/FM IFLA1837TUNERDIODEMATRIXNAD LINKIN-OUTMAINPOWERSUPPLYSPEAKEROUTSTAND BYPOWERSUPPLYRELAYRELAYPOWERAMP.+5V CPUAC INPUTAC INPUTVTVTcedataclkRDS-CLKRDS-SIGRDS-DATAdataout(#1)=Power On(#2)=Protect (Flash 2Hz)(#1)+(#2)=Standby(#1)(#2)LC7218Locking SW,Tone defeatST/MO, MUTE, SMETERTUNEFMOSC/IFAMOSC/IFOUTAUDIOAUDIO ININ S2S3S4S5S6S7S8S9S10VOLUMEMOTORIZEMUTE8WIRING DIAGRAMMAIN BOARDTRANSFORMERSECONDARY BOARDKEY BOARDPSU BOARDSPEAKER BOARDBLACK6PIN BLACK6PIN BLACK35PIN BLACKBROWNBLUE3PIN BLACK3PIN BLACKREDAC INPUTBLUE3PIN BLACK4PIN BLACKBLACKBLACKBLUEGREENTUNER BOARDPOWER SWITCH BOARDPHONE BOARDLED BOARDPRIMARY BOARDP32P39 P40 P41 P42 P43 P44 P45 P46 P47 P48P33P34P35P36OSCRFTestingPointTP2TestingPointTP1TestingPointTP3TestingPointTP49ADJUSTMENT POINTS DIAGRAM1. TUNER2. MAIN BOARDFMSIGNALGENERATOROUTPUTTERMINALOUTPUTTERMINALDISTORTIONANALYZERDISTORTIONANALYZERACVOLTMETEROSCILLOSCOPEACVOLTMETEROROSCILLOSCOPEACVOLTMETEROROSCILLOSCOPEOUTPUTTERMINALOUTPUTTERMINALLRANTENNATERMINALANTENNATERMINALANTENNATERMINALAM LOOPANTENNA(Accessory)AM LOOPANTENNA60cmDIGITALMILLIVOLTMETERVTJ911,GNDFMSIGNALGENERATORAMSIGNALGENERATORFMSIGNALGENERATORRDSGENERATORFMSTEREOGENERATORP901DCMILLIVOLTMETERUNITUNITUNITUNITINSTRUMENT SETUP1. FM MEASUREMENTFig. 1Fig. 22. RDS MEASUREMENTFig. 33. AM MEASUREMENTFig. 410ALIGNMENT PROCEDURESAMPLIFIER SECTIONStepItemConnectionAdjustmentAdjust for1Left ChannelVoltmeter to TP1, TP2 on Amp BoardR8682mV0.2mV2Right ChannelVoltmeter to TP3, TP4 on Amp BoardR8672mV0.2mV11FM/RDS SECTIONINPUT- FM mono:1kHz, 75kHz devi., 60dB/V- FM stereo:1kHz, 67.5kHz devi., 60dB/VPilot signal 19kHz 7.5kHz devi.OUTPUTS- Connect the non-inductive type resistor of 8 ohms to allspeaker terminals otherwise noted.ItemFMIF/RFStereoDistortionStereoSeparationMutingLevelSignaloutputStep1DC voltmeterL9410100mV3DistortionanalyzerDistortionanalyzerOscilloscopeOscilloscopeL942R956R941MinimumMinimum2AC voltmeterIFT on thefront endIFT on thefront endMaximumMaximumseparationConnectionof instrumentFig.1Fig.2Fig.2Fig.1Channel Lor R 1kHz99.0MHz1kHz 75kHz devi.65dBf (60dB)99.0MHz Ext.mod. 65dBf(60dB)FM SGoutputStereo mod-ulator outputTuningfrequency99.0MHz99.0MHzChannel Lor R 1kHz99.0MHz Ext.mod. 65dBf(60dB)99.0MHzmod. 65dBf(60dB) RDS 2% MOD99.0MHz 1KHz 75KHz devi33dB99.0MHz mod.65dBf(60dB)99.0MHz 18dB99.0MHz99.0MHzPilotSuppressionSignalStrengthIndicatorRDSMIN7 bars justlitVTVMVFD SignalBarsL903 FOR LL904 FOR RR991Channel L orR pilot onsignalFig.2Fig.1Fig.399.0MHz99.0MHz99.0MHzOutputindicatorAdjustmentpointAdjustforRemarksFM MUTE/MODEswitch: ON/AUTORepeat the steps1 to 3 until no fur-ther adjustment isnecessary.FM MUTE/MODEswitch: ON/AUTODont turn morethan +/-180Repeat stereodistortion andstereo separationalignment untilTHD at minimumand separation atmaximum.Adjust such thatoutput just unmuteDecode the RDS-program stationAM SECTIONAM Modulation:400Hz, 30%For AH VersionStep123530kHz600kHz990kHz600kHz400Hz 30% mod.60dB/mAM SGoutputTuningfrequencyOutputindicatorAdjustmentpoint600kHz400Hz 30% mod.60dB/mACvoltmeterACvoltmeterDigitalDCvoltmeterL972OSC coilon RFblock M971RF coilon RFblock M971Adjustfor1.350.2VMaximumMaximumStep123522kHzor531kHz603kHz999kHz600kHz400Hz 30% mod.60dB/mAM SGoutputTuningfrequencyOutputindicatorAdjustmentpoint600kHz400Hz 30% mod.60dB/mACvoltmeterACvoltmeterDigitalDCvoltmeterL972OSC coilon RFblock M971RF coilon RFblock M971Adjustfor1.30.2V (522kHz)1.350.2V (531kHz)MaximumMaximumFor C VersionIMPORTANT NOTES1. Show the software versionPress “PRESET/TUNE” and“TUNE UP”.2. Light UP all the icon on theVFLPress “PRESET/TUNE” and“TUNE DOWN”.3. CPU ResetsPress “PRESET/TUNE” and“TUNE DOWN” and any onekey.4. AM Step 10K/9K ChangeAdd or delete the AM stepjumper - J201 in the key PCB.PCB LAYOUTKEY BOARDTOP VIEWBOTTOM VIEWPHONE BOARDLED BOARDSECONDARY BOARDPRIMARY BOARD1213MAIN BOARD14TUNER BOARDPSU BOARDPOWER SWITCH BOARDSPEAKER BOARD1615MAIN BOARDSCHEMATIC DIAGRAMNOTE: 1. RESISTORS ARE CARBON FILM 5% 1/8WUNLESS OTHERWISE SPECIFIED.2. CERAMIC CAPACITORS ARE 50V 10%UNLESS OTHERWISE SPECIFIED.1718TUNER BOARDNOTE: 1. RESISTORS ARE CARBON FILM 5% 1/8WUNLESS OTHERWISE SPECIFIED.2. CERAMIC CAPACITORS ARE 50V 10%UNLESS OTHERWISE SPECIFIED.19KEY BOARDS10S11S12S13S14S01S02S03S04S05S06S26S07S08S09S15S16S17S18S19S20S21S22S23S24S01S03S04S05S06S07S08S09S10S11S12S13S14S15S16S18S19S20S22S23S24S33AC4V8_1AC4V8_2AC4V8_2AC4V8_1S25S25AC4V8_1AC4V8_2S02S21S25S33+13VSTANDBY RELAYS17+5V+5VS26S25-VP+5V6-VPN/ANADN/AN/ATONE INNAD INRESETHEAD_P INXT_2VSS_16M_CF6M_CFVDO_1A/D 0A/D 1A/D 24.4V DETECTPROTECT INRDS SIGNALFA SMETERAM SMETERTRIGGER INRDS CLK INREMCON10G9G8G7G6G5G4G3G2G1GP18P17P16P15P14P13VDO-30VP12P11P10P9P8P7P6P5P4P3P2P1N/AOPTION INPUTFM STEREORDS DATAFM SDRSD SELECTAM STEPFM STEPMODELTONE SPK RELAYMUTETUNER MUTESTANDBY RELAYVOL. UPVOL. DN11 LED12 LEDVSS_29273/7218 DATA OUT7218 DATA9273/7218 CLK9273 STBEE_DATA OUT7218 CEEE_CLK OUT123123456789101112131415161718192021222324252627282930313233343512345678910111213141516171819202122232425262728293031323334353637123123123417OUTSELECT41424344454647484950515253545556575859606162636465666768697071727374757677787980123456789101112131415161819202122232425262728293031323334353637383940OUTU201LC866448R25822KR25922KC20847u/16VM216BLENDM210FM MUTEM207FM/AMM201TUNEM213MEMORYM202DISCM206TUNE DNM203DISPLAYM219A6MHzCST6.00MGWR25722KR23210KD2091N4148D2021N4004R23122KD2041N4148D2051N4148D2061N4148D2071N4148R25210KR25310KR25410KR255 10KR25610KR281 10KR28210KR283 10KR284 10KR285 22KR28622KC2050.1uR23022KR219 1KR218 1KJ201ATO LED BDR201820R204 820R2071K8R2102K2R2134K7M217TAPE1_MONM215TAPE2M211AUXM208VIDEOM205CDM214TUNERR2081K8R2112K2R2144K7R2166K8R202820R205820R203820R29110KR29210KR29310KC203100u/6V3C2040.01uJ206A35PINRDS CLK INTRIGGERAM SMETERFM SMETERRDS SIGNALPROTECT INTONE IN7218 CE9273 STB9273/7218 CLK7218 DATA9273/7218 DATA OUTVOL DNVOL UP+13VTUNER MUTEMUTESPK RELAYFM SDRDS DATAFM STEREO-30V5V6M220DISPLAYR263100KR264100KR265100KR266100KR267100KR268100KR269100KR270100KR271100KR272100KR273100KR274100KR241100KR242100KR243100KR244100KR245100KR246100KR23310KR23410KR23510KR23610KR23710KR23810KR23910KR24010KR24710KR24810KM218PIC-12043TE2REMOTE SENSORL20122uHD2035V6 1/2WR220470RR221470RR222470KD2011N4148C201100u/6V3C2020.01uJ104BAC POWERR215820M209TUNE UPGREENREDJ101TO POWD2101N4148C20610U/16VR260470RD2115V1GREEN=ONGREEN+RED=STDBYNAD INNAD OUTTONE OUTHEAD-PIND_GND5V1R2944.7K12345678U20224C08NOTE: 1. RESISTORS ARE CARBON FILM 5% 1/8WUNLESS OTHERWISE SPECIFIED.2. CERAMIC CAPACITORS ARE 50V 10%UNLESS OTHERWISE SPECIFIED.S37/PE5P00P01P02P03P04P05P06P07VSS2P10/SO0P11/SI0/SB0P12/SCK0P13/SO1P14/SI1/SB1P15/SCK1P16/BUZ40393837363534333231302928272625S15/T15S14/T14S13/T13S12/T12S11/T11S10/T10S9/T9S8/T8S7/T7S6/T6S5/T5S4/T4S3/T4S2/T2S1/T1S0/T165666768697071727374757677787980S36/PE4S35/PE3S34/PE2S33/PE1S32/PE0S31/PD7S30/PD6S29/PD5S28/PD4S27/PD3S26/PD2S25/PD1S24/PD0S23/PC7S22/PC6S21/PC5S20/PC4S19/PC3S18/PC2S17/PC1S16/PC0VPVDD21234 56789101112131415161718192021222324P17/PWM0P30P31P32P33P70/INT0RESXT1/P74XT2/P75VSS1CF1CF2VDD1P80/AN0P81/AN1P82/AN2P83/AN3P84/AN4P85/AN5P86/AN6P87/AN7P71/INT1P72/INT2/T0INP73/INT3/T0IN646362616059585756555453525150494847464544434241Interrupt ControlIREPROM(48KB)EPROMControlA15-A0D7-D0TACEOEDASECPCACCB RegisterC RegisterPSWRARRAMStack PointerWatch Dog TimerPort 0ALUPLAStand-by ControlCFClockGeneratorRCXtalBus InterfaceSIO0BASE TIMERPort 1SIO1Port 3Timer 0Port 7Timer 1Port 8ADCVFD ControllerRAM 128bytesReal TimeServiceHigh VoltageOutputINT0-3Noise Filter20IC BLOCK DIAGRAMU201: LC866448B21U202: 24C08VCC87465321GNDWPSCLLOADLOADINCDATA WORDADDR/COUNTERY DECX DECR/WCOMPSERIALCONTROLLOGICENH.V. PUMP/TIMINGDATA RECOVERYEEPROMSERIAL MUXDOUT/ACKLOGICDEVICEADDRESSCOMPARATORSTARTSTOPLOGICSDAA2A1A0DINDOUT2S11VSS26VDD27 S13S226 S24S325 S35S424 S46S523 S57S622 S68S721 S79S820 S810S919 S911S1018 S1012S1113GND14CK15DATA16STB17 S11(L-ch)10bitLatchCircuitLEVEL SHIFT + SHIFT RESISTERCIRCUIT(R-ch)10bitLatchCircuit(Sameas L-chCircuit)U401: TC9273N22U901: LA1837123456789101112131415302928272625242322212019181716ALCAMOSCAMMIXAMRF.AMPREGAGCAM IFAMS-METERTUNINGDRIVESTEREODRIVEVCCVCCAM/FMIF-BUFFFMS-METERS-CURVEAM IFFMDETGNDFM IF INPUTAM MIXEROUTPUTFM IF INPUTBYPASSAM IF INPUTGNDTU-LEDST LEDAM-IF OUTPUTFM DETECTORAM NARROW CFFM S-METEROUTPUTAM S-METEROUTPUTMUTEFM/AMSWITCHPILOT VCOSDCOMPDETBUFFDECODERANTI-BIRIDE3 rd 5 thSTEREOSWMUTEVCO304kHzFF38kP-DETFM SDADJOSCREGAM RFINPUTAFCAM AGCAM DETECTORINPUTFM DETECTOROUTPUTMPXIUTPUTMPXOUTPUTMPXOUTPUTSTEREO LINPUTSTEREO RINPUTL-OUTR-OUT FF19k FF19k PILOTDETU603: NJM78M1INPUT3OUTPUT2GND AMPLIFIER 1OUTPUTINVERTINGINPUTNON-INVERTINGINPUTV AMPLIFIER 2V +OUTPUTINVERTINGINPUTNON-INVERTINGINPUT12348765+ + U501: NJM4558DU702, U703: NJM5532U704: TL07
