Kenwood-KRC-481-R-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

20、ub motor control.59SUB-OSub motor control.60RESETISystem reset.61REMOTEIRemote control.62R-CLKIRDS clock.63CH-REQ CIChanger request.64PACK-INICassette tape pack-in detection.65KEY-REQIKey signal detection.66-67VSS 0-GND.68VDD 1-VDD.69X2-Main system clock.70X1IMain system clock.71IC-72-73XT1-VDD.74VD

21、D 0-VDD.75AVREF 0IReference voltage.76S-METERISD detection.“H“ : SD exists.“L“ : SD does not exist.77T-MODEICassette tape mode detection.78PHONEINavi mute : Over 2.5V.Tel mute : less than 2.5V.79NOISEINoise detection during FM mode.80AV CONTOReference voltage.(X14-) IC1 : -COMKRC-29Y/35R,379R/RY,479

22、R/RY,481R6TEST MODE1. How to enter the test mode Reset the unit while holding the “FM“ key and preset “6“ key. All indication segments go ON at the beginning of the test mode.2. How to release the test mode Simply reset the unit. (NOTE) The test mode should not released in conditions of ACC OFF, pow

23、er OFF, momentary power down orthe panel off.3. Test mode Blanking Skip (B.S) OFF. Eject a tape by pressing “ATT“ key.4. Audio adjustment Enter the audio mode by pressing the “AUD“ key or “OPEN/CLOSE“ key on the remote controller. Set the volume level to be -10dB. In that case, “30“ should be shown

24、on the display. Loudness OFF. The BASS/MIDDLE/TREBLE and BALANCE/FADER can be adjusted to the full-boost/full-cut and full-front/full-rear each by pressing the “UP“ and “DOWN“ keys.5. Menu mode Enter the menu mode by pressing “CLK“ key or “DNPP“ key on the remote controller. Only on models with RDS

25、function, Local Seeking should be first menu.7ADJUSTMENTKRC-29Y/35R,379R/RY,479R/RY,481RBALANCE/FADER/BASS/TREBLE : CENTERT.ADV/METAL/DOLBY NR/AUTO : OFFNo.ITEMINPUTSETTINGSOUTPUTSETTINGSRECEIVERSETTINGSALIGNMENTPOINTSALIGN FORFIG.CASSETTE DECK SECTION1AZIMUTHTCC-15310KHzSP OUTTAPE PLAYHead azimuths

26、crew(FWD/REV)(ME1)Adjust so that outputlevel in playing “FWD“and “REV“ becomesmaximum each.(b)(b) AZIMUTHPANELFRONTFWDREV8PARTS DESCRIPTOINSKRC-29Y/35R,379R/RY,479R/RY,481RABDFHJCEGI2 1357 46Refer to the schematic diagram for the value of resistors and capacitors.PC BOARD (Component side view)109CP2

27、R10R11R12R13R14R16R17C5CP1C1C2C3C4R21R2R3R4R5R6R7R8R9R18R19R23R24R11421 15124254041646580EBEBEBD29J1Q1Q2Q3IC1D27D28REMOPAN 5VPANEL5VRSTL-DATALL-CEL-CLKSW5VD-GNDL-DATASL-RESKI3ILL-GNDKS3KS2KS5KS4LED+BKI2KI5KI1LAMP+BPL1PL2KS5KI5KI4 KI3KI2KI1KS2KS3KS41564132VOLATT RST123456SRCAUTOdBCLKAMFMD19D18D23D1D2

28、IC2D3D4 D5D6D7D8D9D10D11D12D13D14D16D21D22D20D24ED1X13-989x-xx (J74-1118-12)SWITCH UNITR253R254C515R519 R515R225R228C533 C534R533C532R531R534R535R536R517C512R512C51 1R51 1R513R514R227 C225R101C102C105R141R104C106R414R140C104R146R142R138R106R105C208C404C506R502R503R137C502R521R136C103R135R129R50R132R

29、520C516R504R518R516R522C508R51R415R120R144R122R115R118R1 14R1 13R 111R1 12R116R259R1 17R554R556R413R108C40R258R123R12C14R1 1C204C205R203R226R261R257R262R260C202R256R252R251C355R23R412R107R1 10R109R4C209C354C356C352R353C308C307C305R205C206C207R204C210C21 1R202R201R263 R255R3R16R22 R32C30C20R15C2C303

30、C302CP315CP104TH1CP101R145CP102EBEBBEEBEBBEEBBEBEBEBEBEEBEBEBBECP1031169 815141285481187144021201806141124315 61020 213031401101160E BQ40Q224Q223IC11D102IC10Q501IC1Q101Q251IC9Q50IC8Q10Q221Q222IC2Q552Q20IC12Q151IC6Q301Q201Q1Q11D301DTCDTHCLKRES5VGNDW21W23W2W19W5R303W24R222R143R139W1W17W18W13R161W14W16

31、W7W22W15W8W12R229W25W4W3R232R230W1 1W10W9W6R160R231R158R159R409R410R407R157R21R30R1R2R155R156R153R154R408R411R406R40113910675111128432R537R551R404R501 R405R354R402R403R552R20X1X2121415L201C222C401C402C221C224C255C258251218124C257C203C223C403C201C256C253C252C251C254R221R224R223L3011L304L303L101L306L3

32、05C509C513C507C35317C505C514C518C517C35124C55C304C306C54C50113C51C52C301C53C56C101C501R304R305R162R102R103R10R31C531110L1C1R14D11W20TESTEBJ4WH1D255D261CN2D260D256P1D259D258D257D251D253D252D101CN1D40D2D551D4D3D411D410 D409D401D404D403D402D1J3Q551D30D20D10IC4J5J6D161D157D160D159D153J2A1IC7X14-641x-xx

33、(J74-1121-02)SYNTHESIZER UNITKMOQSLNPRT2 1357 46Refer to the schematic diagram for the value of resistors and capacitors. PC BOARD(Foil side view)1112C1R16R21R142540R134124C26465C3CP1180R10R6R19R17R9CP2C4R8R7BER181R24BEBER2R12R1 1R32R41514R1C5R23R5D29IC1Q2D28D27Q3Q1J1P AN 5VPANEL5VRSTL-DATALL-CEL-CL

34、KSW5VD-GNDL-DATASL-RESKI3ILL-GNDKS3KS2KS5KS4LED+BKI2KI5KI1LAMP+BKI2FMKS5KS4CLKKI5AUT OKS2AMdBKS3SRC56PL26KI454AT T R S TKI132KI311PL12314VOLD9D23D13D24D18D22D20D19D14D21D16D12D11D10D8ED1D4D7 D6D3IC2D5D2D1X13-989x-xx (J74-1118-12)SWITCH UNITC354C355R353C307BE 16C356918C305C352BC308EC302C303EC534R138C

35、105R142R105 R106R146E1B80R141R140C104C102R104C106R41443R1015 6C533110R123CP1026061R202C21 1C206C20C209R107R109R1 10CP315ER23BR4EB4C210R2015C207R118R 111R412R1 12R1 132021R1 14R116R115R108R413R1 17R259R554R55641CP10440R120R122R144CP103C2051R12C14BER1 18R203C20471R258C40148R16EBC30R32R22R15EBR204R205R

36、3R255R263EBC2R26015C20814R261BER256R262R257C202281R251R252R254R253TH1R503R502C506R137R136CP101R135C10312R50R145R132R129B20C502R5211110R522C404R415EB R51R516R52021C508R5043031C516 R5181R536R534 C532R515R519C515 R517R533R535R531C512R51340R51 1C51 1R512R514BER226BEBEEBBR225R228ER227C225Q151IC6Q301D301Q

37、101IC10D102IC11IC12Q552Q20IC1Q10IC8Q251Q11Q201Q1IC2Q501Q50IC9Q221Q222Q223Q40Q22413910675111128432121415113110R304 R303R305R153R156R155R161R154R159R157R158X2C35124C304C306L306L305L304C301L3011L303L1C1R160R143X1TESTR1395VC251R354R162C353W9W12W6R103R102W8R552W1 1E71BR551W7R10C203W3R31W5R14D11W1W15W14W1

38、3W10L201W4R21R30R2W2R1R20118C255W16C201W20C252C258C256C257C254C253252421L101C505C101W22GNDW21R537R501RESC501C517W25C507W23C518C509W24C54C531C513C514C50C52C53C222R224R223C224R221R222C55C223C51C221R410R409DTHDTCCLKR404R406R411R408R407R405C402C403C401R230R403 R402R401C56R229R232R231W17W18W19CN1D157J3D161P1D153A1WH1 D1D551D159D160CN2Q551D252D253D10D40D4D20D30D3D2D255D257D258D259D251D261D260IC4D256D101J6D402 D403D404D409D410D411D401IC7 J5J2J4X14-641x-xx (J74-1121-02)SYNTHESIZER UNIT