Fisher-SLIM1800-mc-sm维修电路原理图.pdf

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1、RadioFans.CN 收音机爱 好者资料库RadioFans.CN 收音机爱 好者资料库ADJUSTMENT LOCATIONS5MAIN PCBL3L3CT2T2T3 LA1823FM/AM IFAM RFFM RFPOWER AMPBA5417POWER SUPPLYTUNERBLOCK DIAGRAMCD MECHSANYODA11B3NCDLC72131LA9240LC78622NELCDDISPLAYKEY BOARD6EQLC75342 LA1823FM/AM IFAM RFFM RFPOWER AMPBA5417POWER SUPPLYTUNERBLOCK DIAGRAMCD

2、 MECHSANYODA11B3NCDLC72131LA9240LC78622NELCDDISPLAYKEY BOARD6EQLC75342CN303CN302CN404CN402CN403CN301CN401CNP901CNP902CN902CN903CN901CNP401L- OUTL- INR- OUTR- INCNP403CNP402CD DECKLEAF SWITCHWIRING DIAGRAM7MAIN PCBKEY PCBDISPLAY PCBCNP903FM ANTENNA 75T. S. DBSBSVcc30K30K30K30K4545ST.BYFILTER123456789

3、101112131415POWERGNDPREGND1PREGND2BA5417BPFVtuneFM AntAMMONOR-OUTL-OUTFMSTGND2FMRVFMOSCMUTEDECODERPHASECOMPPILOTDETFMDETFFFFFFVCOST SWTRIGFMMIXAMRAMMIXAMOSCREGAM AntOSCBUFFERVGND1IFBUFFERSDSTFMS-METERAMDETAGCFMIFAMIFAM/FM Mute IF BuffST10.7MHzV450KHzCC2FFCC1123456789101112AM OSCBuffCC242322212019181

4、716151413LA1823IC BLOCK DIAGRAMS830VCC29VREF28VIN427V 426Vo8Vo72524GNDGND2322 GND21 Vo620 Vo519 V 318 VIN317 CD16 RES15REG INREG OUTVIN2V 2Vo4Vo3GNDGNDGNDVo3Vo1V 1VIN1MuteVcc-+Level shiftBTL AMP44VCC-+BTL AMP3Level shiftBTL AMP11BTL AMPLevel shiftLevel shiftLevel shift322RegulatorRESET12345678910111

5、2131411K11K11K11KGGGGLA6541D9FIN2FIN1EFTB_TETETESISCITHTA_TDTDJPTOFD+JPTGLTOFFTESHFLSLOF-CV+CVRFSM-RFSSLCSLIDGNDFSCTBCNCSLCREFMicrocontrollerINTERFACERF DETAPCVCAI/VBALVCATET.SERVO & T.LOGICF.SERVO & F.LOGICSPINDLE SERVOSLED SERVORF Amp4748464544434241403938373635343332313029282726252423222120191817

6、161514131211109876543216463626160595857 56555453 52 51 5049VCC1LDSLDDBH1PH1LF2VRREFIVCC2FSSDRFCEDATCLCLKDEF_JP+SL-SLSLDSLEQSPD_SPSPGSPNCAGND_FEFE_FAFA_FDLA9241MLC78622NESlice levelcontrolVCO clock os cillatorClock controlSynchronizaiondejectionEFM demodulationtCLV digitalservoSubcodeseparationOCRCMi

7、croprocessorinterlaceServocommandGeneral-purposeportsCrystal oscillator systemTiming generationL.P.F.1- bit DAC8 x oversampingdigital fillors DigitalattenuatorDigitaloutputinterpolationand mutingBillingualRAM addressgenerator2k k 8-bit RAMC1 and C2 error delectionand correctionFlag processingDEFIEFM

8、INFSEQCLV+CLV-V/PPWSBCKSBSYSFSYCSWRQSQOUTCQCKCOINRWCC2FDOUTEFMOVVDDVVSSPDOISETFRPCKTAITST11TEST1TEST2TEST3TEST4TEST5VDDVSSHFLTESTOFFJP-JP+RESTGLPCCLCONT1CONT2CONT3CONT4CONT5EMPH/CONT6EFLG46M4.2MXVSSF5XXINXOUTXVDDRVSSRVDDMUTER/CONT8RCHOLCHOMUTER/CONT7LVSSLVDD10XINXOUTFMINAMINCEDICLDOVDDVSSBO1BO2BO3BO

9、4IO1IO2IFINAOUTAINPDUNIVERSALCOUNTERUNLOCKDETECTORPHASE DETECTORCHARGE PUMPREFERENCEDIVIDERSWALLOW COUNTER1/16, 1/17 4bits12bits PROGRAMMABLE DIVIDERDATA SHIFT REGISTER LATCHPOWER ONRESETCCBI/F12LC72131, 72131MVDDKo 0Ko 7OSC1OSC2OscillatorDividerDecoderOutputcircuitKeyoutputtimingsignalgeneratorVDDT

10、ESTVSSVDDOUTFosc/12LC7461MKI 0Key entrycircuitKey dataregisterCustom coderegisterKI 3COC511312430292827567891011121314 15 16 17181920212223242526LOUTLBASS2LBASS10.1 F2700pFLTRE3.7K0.1 FLIN1 FLSELO+RBASS2RBASS10.1 F3.7K0.1 FROUT2700pFRTRERIN1 FRSELO+-+-+-+-+-+-+-+-+-2.2 FPAVSSTESTCED1CLMicro-controllerVDDVref+NC+2.2 FPA+LVrefRVrefCCB interfaceControl circuitLogic circuitControl circuit1 FL4+1 FL3+1 FL2+1 FL1+NCNCR1R2R3R41 F+1 F+1 F+1 F+-LC75342,75342M12