Kenwood-KRC-29-Y-Service-Manual电路原理图.pdf
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1、CASSETTE RECEIVERKRC-29Y/35RSERVICE MANUAL 2001-1 PRINTED IN KOREAB51-7734-00 (K) 2150KRC-379R/RYKRC-479R/RYKRC-29Y(E)KRC-29CD MD-Changer Control40W x 4MECHANISM EXTENSION CORDW05-0477-00 (7P)W05-0609-00 (10P)KRC-481RSCRLKRC-35R (E)KRC-35RCD MD-Changer Control40W x 4SCRLT. CALLKRC-379R/RY(E)KRC-379R
2、CD MD-Changer Control40W x 4SCRLT. CALLTIVOLADJKRC-479R/RY(E)KRC-479RCD MD-Changer Control45W x 4SCRLT. CALLKRC-481R (M)KRC-481RCD MD-Changer Control45W x 4SCRLT. CALLTIVOLADJ262261242223x2263DC1201The following reference numbers with accessory parts are the same reference numbersused on EXPLODED VI
3、EW and PARTS LIST.246TIVOLADJTIVOLADJT. CALL40%KRC-29Y/35R,379R/RY,479R/RY,481R2BLOCK DIAGRAMF/EFM ANTAM ANTRF GNDFM+BAM+BAM LO/DXFM LO/DXIF SELECTRDS OUTFM SD OUTREQUESTK2I-VTHVCO-GNDFSD OUTFM DET OUTAM DET OUTIF GNDCOMMON+BP-ON 5VDIG GNDPLL DA T APLL CLKPLL CEHI UP ADJFM+BAM+BA8VSW5V(X13)(X14)MMKR
4、C-479R/R YKRC-29Y35R,379R/R Y ,481RSW5VB.U.LO/DXSDS METERPLL-DA T APLL-CESUB+SUB-SW5VACC DETB.U DETSCLMUTESDAEN1EN2EN3PANELRESETLRESLCLKLDATASLDATALDSIFWD/REVTMODEMOTORCH MUTENOISEDATAHDATACREQ HREQ CCH RSTCH CONTCH CLKRchCOMLchLchRchMP INAFSQUALAMMPXOUT RROUT RLOUT FRCD-GNDLEVELSCLSW5VSDASCLSDAOUT
5、FLS-GNDRch RchSTBYMUTEEN2EN3ILLUMIEN1AUDIOVCCB.U.5VAM+BFM+BP-CONFM+BAM+BA8VB.U.5VRchLchP ACKT -ENDSTBYMODEFWDREVB.U.5VA8VB.U.SMUTEB.U.14VB.U.A8V8510INPLA Y HEADB.U.5VAFSR QUALR CLKR DA T APACK INM-STBYTENDL CEB.U.5VREMOSW5VGREENREDB.U.5VPHONEBEEPSVRP-MUTEP-STBY SVRAC GND(BEEP)Lch LchRchLch1200mVAM :
6、 160mVFM : 213mVT APE :1786mVCD/MD-CH :3546mVAM :850mVFM :1345mVT APE :1912mVCD/MD-CH :3795mVAM :910mVFM :1440mVPLL-CLKSW 5VMUSICMSCONT EQ MUTEMUSICMSCONTMUTEA8VIC6RDSDECODERSW 5VSYSTEM u-COMIC1KEYP AN 5VMUTETHERMOPROTECTIONEEPROMB.U. DETSURGE DETB.U.ACCP-CONTMUTEPREPOWER ICDRIVERIC10EQ AMPE-VOLCD/M
7、DCHANGERFRONT LchFRONT RchREAR LchREAR RchFRONT LchFRONT RchREAR LchREAR RchJ2REGULA T O RIC7LCD DRIVERLCDT APE MECHAMAINSUBIC9PRE OUTIC2IC4IC8IC12SP OUTSUB MOTAV RMOT ORJ4DSIREMO RST SWP AN IN SWGREENRED orRST ICIC1 1ACC DETTEL DET TEL MUTEJ2VOL T AGECONNECT ORDCJ6DRIVERIC1REF.No.FUNCTIONOPERATIONI
8、C1LCD DRIVERIC2REMOTE SENSORQ1KEY SCAN SWReceives key signal when the base terminal voltage becomes “L“.Q2KEY ILLUMINATION SWKey illumination color becomes green when the base terminal voltage becomes “H“.Q3KEY ILLUMINATION SWKey illumination color becomes red when the base terminal voltage becomes
9、“H“.REF.No.FUNCTIONOPERATIONQ1P.CON. DETECTIONDetects P.CON voltageQ10BACK-UP DETECTIONDetects the back-up voltage.Q11SERGE DETECTIONDetects serge voltage.Q20ACC DETECTIONDetects ACC voltage.Q40PREOUT MUTE DRIVERMutes when the base terminal voltage level becomes “L“.Q505V SWWorks when the base termi
10、nal voltage level becomes “L“.Q101DSI SWLED for DSI works when the base terminal voltage level becomes “H“.Q151PANEL 5V SWWorks when the base terminal voltage level becomes “L“. Supplies VDD to panel.Q201NOISE DETECTIONDetects noise.Q221-224PREOUT MUTEMutes when the base terminal voltage level becom
11、es “H“.Q251POWER IC SVR SWDischarges the capacitors voltage of SVR terminal after the base termial voltage becomes “H“.Q301LOCAL SEEK SWChanges to the local seeking after the base terminal voltage becomes “H“.Q501MOTOR DRIVER AVRWorks when the base terminal voltage becomes “H“. Supplies the power to
12、 the motor driver.Q551MAIN MOTOR SWWorks when the base terminal voltage becomes “L“.Q552MAIN MOTOR SWWorks when the base terminal voltage becomes “H“.KRC-29Y/35R,379R/RY,479R/RY,481R3COMPONENT DESCRIPTIONSYNTHESIZER UNIT (X14-641x-xx)SWITCH UNIT (X13-989x-xx)KRC-29Y/35R,379R/RY,479R/RY,481R4MICROCOM
13、PUTERS TERMINAL DESCRIPTIONPORTNo.PORT NAMEI/OFUNCTIONOPERATING CONDITION1DSIODSI control.2PANELIPanel detection.“L“ : Panel exists.3-4AVSS-GND.5L-RSTOLCD driver reset.6L-CEOLCD driver chip enable.7AVREF 1IReference voltage8-9PLL-DATAI/OFront-end communication data.10PLL-CLKOFront-end communication
14、clock.11L-DATA LILCD driver communication data.12L-DATA SOLCD driver communication data.13L-CLKOLCD driver communication clock.14R-DATAIRDS data.15R-QUALIRDS QUAL.16CH-DATA CIChanger communication data.17CH-DATA HOChanger communication data.18CH-CLKI/OChanger communication clock.19M-STBYICassette ta
15、pe stand-by detection.“H“ : Stand-by.20T-ENDITape end detection.“H“ : Run.“L“ : Stop.21ACC-DETIACC detection.22BU-DETIBack-up detection.23IC2 TYPE 0IFor service.“L“ : Normally.24IC2 TYPE 1IFor service.“L“ : Normally.25TYPE 0IDestination discrimination.26TYPE 1IDestination discrimination.27TYPE REF O
16、Reference voltage for destination and service.28MOTOROCassette mechanism motor.“H“ : ON.“L“ : OFF.29PLL-CEOFront-end communication chip enable.30SDIStation detection.“H“ : Station exists.“L“ : Station does not exist.31ASFONoise detection time constant switch.32LO/DXOLocal seeking switch.“H“ : LO.“L“
17、 : DX.33VSS 1-GND.34P-MUTEOPower amplifier muting.35SVROSVR control.36-37IC2-SCLOE-volume communication clock.38IC2-SDAI/OE-volume communication data.39MUTEOMuting control.40P-STBYOPower amplifier stand-by.(X14-) IC1 : -COMKRC-29Y/35R,379R/RY,479R/RY,481R5MICROCOMPUTERS TERMINAL DESCRIPTIONPORTNo.PO
18、RT NAMEI/OFUNCTIONOPERATING CONDITION41P.CON-DETIP.CON short-circuited detection.42CH-CONTOChanger control.43-44CH-REC HOChanger request.45-47-48EN2-1OPower supply IC control.49EN2-0OPower supply IC control.50BEEPOBuzzer.51EN3OPower supply IC control.52EN1OPower supply IC control.53SW 5VOP.ON 5V con
19、trol.“H“ : OFF.“L“ : ON.54MUSICITape signal detection.“H“ : Signal does not exist.“L“ : Signal exist.55MS-CONTOTape advanced sensitivity control.“H“ : Play. “L“ : FF/REW.56EQ-MUTEOCassette tape muting.“H“ : ON.“L“ : OFF.57FWD/REVICassette tape running direction detection.“H“ : FWD.“L“ : REV.58SUB+OS
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