NAD-C422-tun-sm 维修电路原理图.pdf

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1、NADC 422STEREOAM/FM TUNERC 422STEREOAM/FM TUNERSERVICE MANUALRadioFans.CN 收音机爱 好者资料库- 2 -SERVICE SAFETY PRECAUTIONS1.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 insulate

2、d 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.CONTENTSDESCRIPTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、. . . . PAGESPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3REAR PANEL / FRONT PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4DISASSEMBLY INSTRUCTIONS . . . . .

4、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5、. . . . . . . . . . . . . . . . . . . . . . . 7ADJUSTMENT POINTS DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8INSTRUMENT SETUP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9ALIGNMENT

6、 PROCEDURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10PCB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-12SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . .

7、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-14IC BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-17ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8、. . . . . 18-23EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-26PACKING DIAGRAM . . . . . . . . . . .

9、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27RadioFans.CN 收音机爱 好者资料库- 3 -SPECIFICATIONSAM TUNER SECTIONInput level is expressed as the reading in open-circuitof 75-ohm source impedance signal generatorUsable Sensitivity (999/1000kHz)30dBS/N Ratio (5mV in

10、)38dBTHD (5mV in)3%IF Rejection (450kHz)36dBImage Rejection (F+2xIF)28dBSelectivity17dBOutput130 +/-20mVLoop Sensitivity (20dB S/N)999/1000 kHz66 dB603/600 kHz66 dB1404/1400 kHz66 dBFrequency response (100 - 2.3 kHz, 5mV)6 dBFM TUNER SECTION*C*AHInput level is expressed as the reading in open-circui

11、tof 75-ohm source impedance signal generatorUsable Sensitivity (98 MHz)13 dB13 dBSignal / Noise RatioMono72 dB72 dB(60 dB, IHF wtd)Stereo66 dB66 dBFrequency Response (20 Hz - 15 kHz, 60 dB)01.0 dB01.0 dBChannel Separation (60 dB)30 Hz33 dB33 dB1 kHz42 dB42 dB10 kHz32 dB32 dBAlternate Channel Sensiti

12、vity(40 dB, 400 kHz)60 dB45 dBCapture Ratio (40 dB)3 dB3 dBAM Suppression(60 dB, 100% Mod.FM, 30% Mod AM)65 dB65 dBImage Rejection (119.4 MHz)85 dB85 dBI.F. Rejection (10.7 MHz)78 dB78 dBPilot Suppression (60 dB)60 dB60 dBTHD (60 dB, L=R 75 kHz for AH, 40 kHz Dev for C)Mono0.25%0.25%Stereo0.35%0.35%

13、Auto-Search sensitivityOn24 dB24 dBOff15 dB15 dBRDS Decode Sensitivity26 dB26 dBPHYSICAL SPECIFICATIONSDimensions (Width x Height x Depth)435 x 80 x 285 mmNet weight4 kg (8.8 lbs)Shipping weight5.1 kg (11.22 lbs)- 4 -REAR PANEL / FRONT PANELREAR PANELFRONT PANEL1. FM ANTENNA2. AM ANTENNA3. OUTPUT4.

14、IR IN5. 12V TRIGGER IN6. AC LINE CORD1. POWER ON / OFF2. POWER STATUS INDICATOR3. BLEND4. MEMORY5. FM MUTE / MODE6. AM / FM7. DISPLAY8. PRESET / TUNE9. DISPLAY AREA10. PRESET / TUNE CONTROL 2003 NAD C 422OUTPUTANTENNAGNDAMFMLRLR+12V TRIGGERINIRIN634512PRESET / TUNEMEMORYAM / FMDISPLAYDELETEBLENDFM M

15、UTE/ MODEPRESET/ TUNE 2003 NAD C 422PRESETPRESETPROGRAMPROGRAMFM MUTEFM MUTEBLENDBLENDTUNEDTUNEDFM STFM STRDSRDS ANTENNAANTENNA 34567110982RDS Stereo Tuner C 422IMPORTANT NOTES1. Show the software versionPress “PRESET/TUNE” and “TUNE UP” ().2. Light UP all the icon on the VFLPress “PRESET/TUNE” and

16、“TUNE DOWN” ().3. CPU ResetsPress “PRESET/TUNE” and “TUNE DOWN” () and any one key.4. AM Step 10K/9K ChangeAdd D206: 10KHz / Delete D206: 9KHz.- 5 -54312766DISASSEMBLY 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 pane

17、l.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.- 6 -BLOCK DIAGRAMAM LOOP ANTFM ANTOUTPUTFRONT ENDENV172D3G1VFDCPULC866448BU201KEY MATRIXTrigge

18、r INU202EEPROM24C08PLLLC72723MRDS DECODERU901AM/FM IFLA1837MUTINGDIODEMATRIX12V TRIGGERINIR INM218REMOTESENSORPOWERSUPPLYVFD-VP+5V CPU+10VAC INPUTLRVTVTcedataclkRDS-CLKRDS-SIGRDS-DATAMPXINdataout(#1)=Power On(#2)=Protect (Flash 2Hz)(#1)+(#2)=Standby(#1)(#2)LC7218U903ST/MO, MUTE, SMETERTUNEFMOSC/IFAM

19、OSC/IF127171623230U902212345152319586 -IR IN 22-12V TRIGGER IN2416147916142278717257576741918- 7 -WIRING DIAGRAMMAIN BOARDKEY BOARDLED BOARDTRANSFORMERYELLOWBLUEWHITEPOWER SUPPLY BOARD- 8 -ADJUSTMENT POINTS DIAGRAMVTOSCRF- 9 -FMSIGNALGENERATORANTENNATERMINALOUTPUTTERMINALDISTORTIONMETERDISTORTIONMET

20、ERACVOLTMETEROSCILLOSCOPEACVOLTMETEROROSCILLOSCOPEACVOLTMETEROROSCILLOSCOPEOUTPUTTERMINALOUTPUTTERMINALLRANTENNATERMINALANTENNATERMINALANTENNATERMINALAM LOOPANTENNA(Accessory)AM LOOPANTENNA60cmDIGITALMILLIVOLT-METERVT_J911FMSIGNALGENERATORAMSIGNALGENERATORFMSIGNALGENERATORRDSGENERATORFMSTEREOGENERAT

21、ORP901OUTPUTTERMINALDCMILLIVOLT-METERUNITUNITUNITUNITINSTRUMENT SETUP1. FM MEASUREMENTFig. 1Fig. 22. RDS MEASUREMENTFig. 33. AM MEASUREMENTFig. 4- 10 -ALIGNMENT PROCEDURESFM/RDS SECTION- FM mono:1kHz, 75kHz devi., 60dB/V- FM stereo:1kHz, 67.5kHz devi., 60dB/VPilot signal 19kHz 7.5kHz devi.OUTPUTS- C

22、onnect the 47Kohm resistor unless otherwise noted.ItemFMIF/RFStereoDistortionStereoSeparationMuteLevelSignaloutputStep1DC voltmeterL941070mV3DistortionanalyzerDistortionanalyzerOscilloscopeOscilloscopeL942R941R956MinimumMinimum2AC voltmeterIFT on thefront endIFT on thefront endMaximumMaximumseparati

23、onDistortionMeterMinimumConnectionof 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)99.0MHz Ext.mod. 65dBf(60dB)RDS 2% MOD99.0

24、MHz 18dB99.0MHz99.0MHzRDSFig.399.0MHzOutputindicatorAdjustmentpointAdjustforRemarksFM 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

25、separation atmaximum.Decodethe RDS-Program stationAM SECTIONAF Modulation: 400Hz, 30%For AH VersionStep123530kHz600kHz990kHz600kHz400Hz 30% mod.60dB/mAM SGoutputTuningfrequencyOutputindicatorAdjustmentpoint600kHz400Hz 30% mod.60dB/mACvoltmeterACvoltmeterDigitalDCvoltmeterL972OSC coilon RFblock M971R

26、F coilon RFblock M971Adjustfor1.350.2VMaximumMaximumStep123522kHzor531kHz603kHz999kHz600kHz400Hz 30% mod.60dB/mAM SGoutputTuningfrequencyOutputindicatorAdjustmentpoint600kHz400Hz 30% mod.60dB/mACvoltmeterACvoltmeterDigitalDCvoltmeterL972OSC coilon RFblock M971RF coilon RFblock M971Adjustfor1.30.2V (

27、522kHz)1.350.2V (531kHz)MaximumMaximumFor C Version- 11 -PCB LAYOUTPOWER SUPPLY BOARDKEY BOARDLED BOARDMAIN BOARD- 12 - 13 -SCHEMATIC DIAGRAMKEYBOARD / DISPLAYNOTE:1. RESISTORS ARE CARBON FILM 5% 1/8WUNLESS OTHERWISE SPECIFIED.2. CERAMIC CAPACITORS ARE 50V 10%UNLESS OTHERWISE SPECIFIED.MODEFM/AMFM M

28、UTEPRESET/TUNE DISPLAYSTOREBLEND- 14 -TUNERLEFT OUTRIGHT OUTM987NOTE: 1. RESISTORS ARE CARBON FILM 5% 1/8WUNLESS OTHERWISE SPECIFIED.2. CERAMIC CAPACITORS ARE 50V 10%UNLESS OTHERWISE SPECIFIED.- 15 -IC BLOCK DIAGRAMU201: LC866448BU202: 24C08U402: NJM78M56FAS37/PE5P00P01P02P03P04P05P06P07VSS2P10/SO0P

29、11/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/PD0S2

30、3/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/T0IN646362616059585756555453525150494847464544434241VCC

31、87465321GNDWPSCLLOADLOADINCDATA WORDADDR/COUNTERY DECX DECR/WCOMPSERIALCONTROLLOGICENH.V. PUMP/TIMINGDATA RECOVERYEEPROMSERIAL MUXDOUT/ACKLOGICDEVICEADDRESSCOMPARATORSTARTSTOPLOGICSDAA2A1A0DINDOUT1INPUT3OUTPUT2GND- 16 -U901: LA1837U701: LM393D123456789101112131415302928272625242322212019181716ALCAMO

32、SCAMMIXAMRF.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

33、 thSTEREOSWMUTEVCO304kHzFF38kP-DETFM SDADJOSCREGAM RFINPUTAFCAM AGCAM DETECTORINPUTFM DETECTOROUTPUTMPXIUTPUTMPXOUTPUTMPXOUTPUTAM STEREO LINPUTAM STEREO RINPUTL-OUTR-OUT FF19k FF19k PILOTDETNon-invertingInputInvertingInput3.5A100A3.5A100ACCVCCVCCVCCVOVGND P4P1&P7P8P2&P6P3&P5Dual-In-Line/SOICPackage-

34、 17 -212216152023871714131211109543218192416XINFMINAMINCEDICLD0OUT0OUT1XOUTPHASE DETECTORCHARGE PUMPREFERENCEDIVIDERSWALLOW COUNTER1/16, 1/17 4 BITSHIFT REGISTERLATCHUNIVERSALCOUNTER1212-BIT PROGRAMMABLEDIVIDERSYCOUT2 OUT3OUT4 OUT5 OUT6IN0IN1VSSVDDLCTRHCTRPD2PD1U902: LC72723MVdda3REFERENCEVOLTAGEANT

35、IALIASINGFILTERDATADECODERVREF1VREFFLOUT5CIN6PLL(57kHz)CLOCKRECOVERY(1187.5Hz)+_Vddd11Vssd10RDDA14RDCL15MODE12RST13RDS-ID/READY16Vssa4MPXIN2TEST7TEST57kHzBPF(SCF)SMOOTHINGFILTEROSCCLK(4.332MHz)9XIN8XOUTRDS-IDDETECTRAM(128bits)U903: LC7218- 18 -ELECTRICAL PARTS LISTKEY ASSYPC BOARDPCB-N0A50C-KEYPCB A

36、SSY KEY N0A50CCAPACITORC201157B-107M-5-KMKCE 6.3V 100F 20% RLC202153F-103J-5-KMCM 50V 0.01F 5% RLCOILL2011801-220K-MCOIL 22H 10% AL BL7WAFER/CONNECTORJ202A2101-1581-0FLEXIBLE CONN. 35PJ204B2102-021R-004WAFER 2P P2.5 RIGHTRESISTORR2014701-681J-2RCF 1/8W 680R 5% ATR203,R204,R2944701-122J-2RCF 1/8W 1.2

37、K 5% ATR2074701-182J-2RCF 1/8W 1.8K 5% ATR2104701-222J-2RCF 1/8W 2.2K 5% ATR2134701-472J-2RCF 1/8W 4.7K 5% ATR220,R2214701-471J-2RCF 1/8W 470R 5% ATR2224701-473J-2RCF 1/8W 47K 5% ATR233-R240,R247,R248,R291-R2934701-103J-2RCF 1/8W 10K 5% ATR241-R246,R263-R2724701-104J-2RCF 1/8W 100K 5% ATDIODED201480

38、4-1480-CDIODE 1N4148 ATSD2034837-5B61-2DZ 1/2W 5.45-5.73 ROHMSWITCHM201,M204,M207,M210,M213,M2165200-3538-0SWITCH, TACT SKHHBY 7MMM203,M2065200-4721-0TACT SWITCH (RIGHTWIREJ203A7705-1150-20045P CONN WIRE ASSY L=150J204A7702-1075-2004CONN.ASSY 2P P2.5 L=75PC BOARD03001725-080B-0100PCB MAIN/KEY/VFD N0

39、A50CMISCELLANEOUS03024154-2101-0VFD HOLDER03032460-1960-0VFD, SAMSUNG,HNA-10SM12Reference No.Part No.DescriptionM2184814-3TE2-3IR SENSOR PIC-12043TE2LED ASSYPC BOARDPCB-N0A50C-LEDPCB ASSY LED N0A50CLEDD2113700-3517-RGLED RED/GREEN (L-469HGW)WIREJ201B7703-1320-20043P CONN WIRE ASSY L=320PC BOARD1725-

40、080B-0100PCB MAIN/KEY/VFD N0A50CPSU ASSYPC BOARD*AHPCB-N0A50C-PSUPCB ASSY PSU N0A50C*CEPCB-N0A51C-PSUPCB ASSY PSU N0A51CCAPACITORC801 8910-0049-0CAP400V 4700PRESISTORR801 *AH4717-335J-2-SRMF 1/2W 3.3M 5% AT ULSWITCH0401 5200-3151-0-01POWER SWITCHPC BOARD04001725-080B-0100PCB MAIN/KEY/VFD N0A50CMISCE

41、LLANEOUSM801,M803-M8064132-1071-0TERMINAL PINTUN ASSYPC BOARD*AHPCB-N0A50C-TUNPCB ASSY TUN N0A50C*CEPCB-N0A51C-TUNPCB ASSY TUN N0A51CCAPACITORC203157B-107M-5-KMKCE 6.3V 100F 20% RL 6x7C204,C210153F-103J-5-IMCM 50V 0.01F 5% RL 5X7C205150F-104Z-5-IUCC 50V 0.1F +80/-20% RL 5x11C208157D-476M-5-IUKCE 16V

42、 47F 20% RL 5X11- 19 -Reference No.Part No.Description- 20 -C401,C402,C403,C404153F-224J-5-MIBCM 50V 0.22F 5% RL 7x5C405157D-228M-5-X9ECE 16V 2200F 20% RL 12.5x20C406,C407157D-108M-5-S9KCE 16V 1000F 20% RL 10 x20 C408,C409157D-227M-5-OMKCE 16V 220F 20% RL 8x7C410,C411,C420,C706150F-104K-5-IICC 50V 0

43、.1F 10% RL 5x5C412,C414,C906,C942157D-107M-5-KUKCE 16V 100F 20% RL 6x11C413,C421157E-108M-5-S9ECE 25V 1000F 20% RL 10X20C415157F-107M-5-OWCE 50V 100F 20% RL 8x12C416,C417,C418157F-107M-5-OVKCE 50V 100F 20% RL 8x11.5C419157C-476M-5-IMKCE 10V 47F 20% RL 5X7C702,C707153F-102J-5-IMCM 50V 1000PF 5% RL 5x

44、7C703150F-103K-5-IICC 50V 0.01F 10% RL 5x5C705150F-681J-5-OICC 50V 680PF 5% RL 8X5C709157C-107M-5-IUCE 10V 100F 20% RL 5x11C901 *CE150F-223K-2-FDCC 50V 0.022F 10% ATC902,C903,C930,C932,C941,C949,150F-223K-2-FDCC 50V 0.022F 10% ATC950,C968,C970,C974,C976,C978,C981,C987C904,C928,C975157D-106M-5-GMCE 1

45、6V 10F 20% RL 4x7C911150F-200J-2-FCCC 50V 20pF 5% AT 3.5x2C912,C913150F-102K-2-FCCC 50V 1000pF 10% AT 3.5x2C914,C915,C945,C982150F-101K-2-FCCC 50V 100pF 10% AT 3.5x2C916150F-331K-2-FCCC 50V 330pF 10% AT 3.5x2C92415CH-270J-5-GGCTC 0/60 27pF 5% RL 4x4C92515CH-200J-5-GGCTC 0/60 20pF 5% RL 4x4C926153F-3

46、33J-5-NLMCM 50V 0.033F 5% RL 7.5C927,C943,C977157F-225M-5-GMCE 50V 2.2F 20% RL 4x7C929157F-224M-5-GMCE 50V 0.22F 20% RL 4x7C931,C986,C990157B-107M-5-KMCE 6.3V 100F 20% RL 6x7C944157F-475M-5-GMCE 50V 4.7F 20% RL 4x7C946,C948157F-105M-5-GMCE 50V 1F 20% RL 4x7C947157F-474M-5-GMCE 50V 0.47F 20% RL 4x7C9

47、51157E-475M-5-GMECE 25V 4.7F 20% RL 4X7C953,C954,C965150D-272K-2-FCCC 16V 2700pF 10% AT 3.5x2C959,C960,C963,C964,C979157D-226M-5-GMCE 16V 22F 20% RL 4X7C961,C962 *CE153F-152J-5-KWCM 50V 1500pF 5% RL 6x12C961,C962 *AH153F-272J-5-JMCM 50V 2700PF 5% RL 5.5x7C967157D-474M-5-IICE 16V 0.47F 20% RL 5x5C969

48、157D-476M-5-IMCE 16V 47F 20% RL 5X7C97115CH-080D-5-GGCTC 0/60 8pF 0.5pF RL 4x4C973153F-473J-5-NLMCM 50V 0.047F 5% RL 7.5x6.5C980153F-152J-5-KWCM 50V 1500pF 5% RL 6x12C985150F-561K-2-FCCC 50V 560pF 10% AT 3.5x2C988,C98915CH-300J-5-IGCTC 0/60 30pF 5% RL 5x4C99115CG-102J-7-IJCTC 0/30 1000pF 5% RM 5x5.5

49、C992150F-103K-2-FCCC 50V 0.01F 10% AT 3.5x2R995150F-224M-N-IICC 50V 0.22F 20% RLF MOReference No.Part No.Description- 21 -TUNERM9011300-0726-0TUNER ENV172D3G1COILL7011807-273J-PSCOIL 27MH 5% 8.3X9.7L9011801-220K-MCOIL 22H 10% AL BL7L905,L985,R9121801-101K-MCOIL 100H 10%WAFER/CONNCETOR0205 *AH2107-06

50、41-0ANT-TERMINAL F-TYPE0205 *CE2107-0681-0ANT-TERMINAL (DIN-TYPE)J201A2102-031S-0043 PIN ST. WAFERJ202B2101-1591-0FLEXIBLE CONN. 35P P1.25J203B2102-051S-0045P ST.WAFERJ401B2102-081S-004WAFER 8P P2.5 ST.JACK02042113-1300-02P RCA JACK W/R AUM302,M3032113-1179-0PHONE JACK D3.5 BKP9012113-1160-0WAFER 2P