Kenwood-KRC-268-Service-Manual电路原理图.pdf

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1、CASSETTE RECEIVERKRC-208S/218SERVICE MANUAL 2000-1 PRINTED IN KOREAB51-7586-00 (K) 1787KRC-268/288KRC-28MRKRC-28MR (K)PLASTIC CABINET ASSY(A02-1486-13)LEVER(D10-3031-04) x2MOUNTING HARDWARE ASSY(J21-9491-03)DC CORD(E30-xxxx-xx)(Refer to the parts list.)CD/MD-CHANGER CONTROLKRC-208SCD/MD-CHANGER CONT

2、ROLKRC-28MRKRC-268KRC-208S (K)KRC-218 (K)KRC-268 (M)STAY(J54-0606-04)SCREW SET(N99-1610-15)(Except KRC-28MR)SCREW SET(N99-1632-05)KRC-218CD/MD-CHANGER CONTROLKRC-288KRC-288 (M)AUD123456CLKATTSRCPWROFFAMEADJAUTOSCANRDMREPT.C/D.SCNM.RDMLOUDDISCCRSCA.ADJFMAMFFREWPROGAUD123456CLKATTSRCPWROFFAMEADJAUTOSC

3、ANRDMREPT.C/D.SCNM.RDMLOUDDISCCRSCA.ADJFMAMFFREWPROGAUD123456CLKATTSRCPWROFFAMEADJAUTOT.CALLLOUDCRSCA.ADJFMAMFFREWPROGAUD123456CLKATTSRCPWROFFAMEADJAUTOT.CALLLOUDCRSCA.ADJFMAMFFREWPROGAUD123456CLKATTSRCPWROFFAMEADJAUTOSCANRDMREPT.C/D.SCNM.RDMLOUDDISCCRSCA.ADJFMAMFFREWPROG40%KRC-208S/218,268/288,28MR

4、2BLOCK DIAGRAMIC1KEYPANEL 5V SWMUTEB.U. DET. B.U.ACCP-CONT.MUTEPREPOWER ICEQ. AMP.CH ISO AMPNC/MPXE-VOL.CD/MDCHANGERFRONT LchFRONT RchREAR LchREAR RchJ2LCD DRIVERLCDME1MAINTAPE MECHA.IC51 Lch2 RchPRE OUTIC2IC4IC3SP OUTREARJ4RESET SWPAN IN SWANT-CONT.P-CONT.J2J5IC1FRONT-ENDJ1FM+BQ201AM+BQ203AM BPFFM

5、BPFC154,157,R206C153,156,R207Q320Q450,451Q370,371Q50Q350-353Q353P-CON.SWQ54-57COM+BQ58-61ILLUMI.B.U.5VQ51,52SYSTEM u-COMS1S2S3P-CONT.CHANGERRST SWQ301D1-15PL1,2ANT.ANT-CONT.FM ANTAM ANTRF GNDFM+BAM+BOSC GNDOSC GNDOSC GNDVTPLL +BIFC OUTSDASCLDIG GNDIF1+BIF1 GNDS-METERIF2 GNDSDFM+BSW5VACC DETB.U. DETS

6、CLMUTESDAP. CONPANELHOLDL CLKL DATASL DATALFWD/REVMOTORCH CONDATAHDATACREQ HREQ CCH CLKRchCOMLchTAPEMP INAMMPXOUT RROUT LROUT RFRchLEVELSCLSDAOUT LFRchSTBYMUTERchLchT-MUTEFWDREVB.U.5V8VB.U.CHRSTS MUTE8410B.U.5VAM+BVDD 5VPACK INL CEANT CONCHMUTEBEEPSVRAMP. STBYSVRAC GND (BEEP)Lch LchRchLch1200mVTAPE

7、:1681mVCD/MD-CH :3529mVAM :546mVFM :1781mV8VRF GNDOSC GNDIF2 +BAUDIO OUT8VS-METERSDPLL CLKPLL DATAM1HD1R55.6mVBU5VSW5V8VB.U.5VAM: 170mVFM: 400mVLPACK IN(FF/REW)AMP. MUTEFF/REWBU5VILL(X13)MKRC-208S/218,268/288,28MR (K/K,M/M,K)A13KRC-208S/218,268/288,28MRCOMPONENT DESCRIPTIONSYNTHESIZER UNIT (X14-614x

8、-xx)REF. No.FUNCTIONOPERATIONIC1SYSTEM -COMControls system.IC2ELECTRIC VOLUMEControls sound volume. Selects each source.IC3MUTEControls each mute output.IC4POWER ICAmplifies power so that the speaker can drive audio signal.IC5EQUALIZER AMPLIFIEREqualizer amplifier for cassette tape sound.Q50BACK-UP

9、DETECTIONStops when the back-up voltage comes less than 9.2V.Q51,52BACK-UP 5V AVRWorks when the back-up works.Q53P.ON DRIVERWorks when the power comes.Q54,55COM+B SWWorks when 5V comes.Q56,57COM+B AVRWorks when Q54 and Q55 work.Q58,59ILLUMINATION +B SWWorks when the base level of Q58 comes “H“.Q60,6

10、1ILLUMINATION +B AVRWorks when Q58 and Q59 work.Q150ELECTRIC VOLUME MUTE SWWorks when the base level comes “H“.Q151SVR DISCHARGE SWWorks when the base level comes “H“.Q153PRE MUTE DRIVERWorks when the base level comes “L“.Q200FM +B SWWorks when the base level comes “H“ in FM mode.Q201FM +B DRIVERWor

11、ks when Q200 works.Q202AM +B SWWorks when the base level comes “H“ in AM mode.Q203AM +B DRIVERWorks when Q203 works.Q260MOTOR +B SWWorks when the base level comes “H“ in the tape mode.Q261MOTOR +B DRIVERWorks when Q260 works.Q301CHANGER RESET SWWorks when the base level comes “L“.Q320PANEL 5V SWWork

12、s when the base level comes “L“.Q350P-CON. DRIVERWorks when Q353 works.Q351,352P-CON. PROTECTIONWorks when P-CON output voltage goes down.Q353P-CON. SWWorks when the base level comes “H“.Q370ANTENNA CONTROL DRIVERWorks when Q371 works.Q371ANTENNA CONTROL SWWorks when the base level comes “H“ in the

13、tuner mode.Q450,451PRE MUTE SWWorks when Q153 works.4KRC-208S/218,268/288,28MRCIRCUIT DESCRIPTION(X14-) IC1 : -COMPORT No.PORT NAMEI/OFUNCTIONOPERATING CONDITION1XINI-com clock. (4.5MHz)-2GND-GND.-3L DATA LILCD driver data.-4L DATA SOLCD driver data.-5L CLKOLCD driver clock.-6LCEOLCD driver chip ena

14、ble.-7SDAI/OE-volume data.-8PLL DATAI/OTuner data.-9PLL CLKOTuner clock.-10SDITuner signal detection.“H“ : Tuner signal exists.“L“ : Tuner signal does not exist.11DATA CIChanger data.-12DATA HOHead unit data.-13CH CLKI/OChanger clock.-14-No connection.-15MOTOROMechanism motor.-16SCLOE-volume clock.-

15、17-24-No connection.-25AM+BOAM power supply.-26FM+BOFM power supply.-27PACK INICassette tape pack-in.“L“ : Pack in. “H“ : Ejection.28FF/REWIFF/REW signal.“L“ : FF/REW. “H“ : Play.29,30GND-GND.-31VDD-VDD.-32REQ CIRequest from changer.-33MUTEOMute.-34CH CONOChanger control.-35REQ HORequest to head uni

16、t.-36SVROPower IC (IC4) discharge control.-37AMP STBYOPower IC (IC4) stand-by.-38AMP MUTEOPower IC (IC4) mute.-39P CONOP.CON for external amplifier.-40ANT. CONOPower antenna.-41SW5OCircumambient circuit power supply control.-42ILLOIllumination.-43-No connection.-44BEEPOBuzzer. (2KHz)-45-47-No connec

17、tion.-48ROLL OFFIDestination switch.-49N.CANIDestination switch.-50SEL1IDestination switch.-51SEL2IDestination switch.-52-No connection.-53EQ MUTEOTape equalizer mute.-54FWD/REVIFWD/REV.-55-No connection.-56REMOIRemote control.-57-60-No connection.-61ACC DETIACC detection.-62BU DETIBack-up detection

18、.-63S METERITuner signal meter.-64PANELIPanel on/off.“L“ : Panel on. “H“ : Panel off.65,66GND-GND.-67HOLDIClock stop.-68VDD-VDD.-69,70GND-GND.-71,72-No connection.-73VDD-VDD.-74,75GND-GND.-76VSS-GND.-77,78-No connection.-79GND-GND.-80XOUTO-com clock. (4.5MHz)-5TEST MODEKRC-208S/218,268/288,28MR1. Ho

19、w to enter the test modeReset 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 modeSimply reset the unit.(NOTE) The test mode is not canceled by ACC OFF, power OFF, momentary powerdown or the panel off.3

20、. Audio adjustmentSet the volume level to -10dB (which is shown as “30“ on the display).Loudness OFF.The BASS/TREBLE and BALANCE/FADER can be set to the full-boost/full-cut and full-front/full-rear each by pressing the “Track UP“ / “Track DOWN“ keys.Sound coordination doesnt appear for the feed.6KRC

21、-208S/218,268/288,28MRADJUSTMENT/EINSTELLUNGEN (MECHA.)Einstellung des KopfwinkelsVorgehensweise bei der Kopfhhen-Einstellung Whrend des Bandlaufs in Vorwrtsrichtung die Schrauben Fund F soeinstellen, da die Linie A eines 2-Linien-Bands (2-LINE TAPE) durchdie Mitte der Kopfabschirmplatte (Zentrum de

22、s Mittelbereichs) verluft. Whrend des Bandlaufs in Rckwrtsrichtung die Schrauben Rund Rso einstellen, da die Linie B eines 2-Linien-Bands (2-LINE TAPE)durch die Mitte der Kopfabschirmplatte (Zentrum des Mittelbereichs)verluft. Nachdem die obige Einstellung abgschlossen ist, die Bandlaufrichtungumkeh

23、ren und die Ausrichtung in Vorwrtsrichtung noch einmalberprfen. Wenn eine Abweichung festgestellt wird, ist dieseEinstellung zu wiederholen. (Verwendetes Band: SCC-1659, hergestelltvon A-BEX)Head Angle AdjustmentHead height alignment procedure During FWD transport adjust screws Fand F so that line A

24、 of 2-LINETAPE passes trough the center of the head shield plate (core centerarea) During RVS transport adjust screws Rand R so that line B of 2-LINETAPE passes trough the center of the head shield plate core (centerarea) After the alignment above, reverse the transport direction and check theFWD al

25、ignment again. If it is deviated, perform alignment again. (Tapeused : SCC-1659, manufactured by A-BEX)(2-LINE TAPE)BABA(FWD)(RVS)HEIGHT(FWD)HEIGHT/AZIMUTH(FWD)HEIGHT/AZIMUTH(RVS)TAPE SPEEDHEIGHT(RVS)FFRRABDFHJCEGI2 1357 46Refer to the schematic diagram for the value of resistors and capacitors.PC B

26、OARD (Component side view)87W122R58R155R15W112R14R62W113R152R129R59W133W119R413C202R16R13W1 1 1W121R372R151C101R324C163R161W135R102R1 18R119R115R1 14R126R60R61R52R54R105R106R103R207 R206C164R352R320C155C154C157C156C153C151C351C506R127R154R150R153R322R401R400R408R409R407R406R412R410R41 1R303R304R306R

27、305R403R301R402R321W129C54R63R64R57W1 14C52W116R201R203R200C200C452C201R205R455R453R454R451R450R452R104C1 C2C6C5C7 C8R6R7R5R2R3R4C14R8C13R1C251R251R323W131W125C102C103W128W130R160W124W118R158W117W115W123R157R156R159R250R405R404R137W134W120R122R125R120R121R123R 111R109W126R1 10W127R108W132R131C321TH1

28、EBBEBEEBBEEBBEEBEBEBBEEBEBBEEBEBEBEBBEBEEBEB114 15288147118024 2540416465BEQ61Q52Q371Q59Q58Q57Q153Q151Q150Q55Q54Q53Q50Q353Q301Q320Q352Q351Q202Q200Q451Q450Q260IC3IC2IC1X14-614x-xx (J74-0959-22) SYNTHESIZER UNITCN1Q60 Q56D411D405D352Q51Q350D401D400D56D52D51D55D54D402D408D409 D403D350D351/W104D53Q201Q2

29、03D200Q261D404D260IC5J4J5J2J1A1D370IC4D50Q370D371D151D150D152P1WH1D100J3CN2D261REMOGNDW100W28W75W85W22W33W73W67W72W65W13W96W35W36W68W64W15W8W31W71W69W27W79W76W34W39W43W46W51W98W99W23L3R50R65R351R353R66W48W10X1C50C17C18C160C152C55W40W20C15C16C161C350C352C162C450C451C150C159C56C58C53C57W58W94W95W101W5

30、4W41W53W29W12W16W18W7R261L5R260L4C402C400C401W5W14W17W11C4C3C9C250C10W92W9W70W59W30 W25W50W24W87W80W97W93W89W88W103W86W90W78W61W3 W2 W1W56W82W44W47W83W19W74W81W49W77W37W63W32W55W102W57W52W60W62W38W84W42W21W45L14.5MR202R55R67R350R370W105R371L8C206L9R373R1 16W26C320R138R1329 13106751111284321212252419

31、8161224252 1115611121821BEB EE BBEBEEBBE EBR20R21R1 R2R3R14R1812R13R121112R83249R19C564R1 11C4C1C2EB161748 33R5R6R4D17J1IC1Q1SWITCH UNITD5D4D1D2D3D6D7D8D9D10 D11ED1D14X13-965x-xx (J74-0963-12)D12D13D15123456PL129 1PL2AT TSRCAUT OCLKRESETAUDAMFMKMOQSLNPRT2 1357 46Refer to the schematic diagram for th

32、e value of resistors and capacitors. PC BOARD (Foil side view)910R13R14R18R8R11R12R19C4C2C1C5R3R4R2R1R21 R20R5R6EB1 1648 336449 3217121121Q1IC1D17J1D15D13D12D11D10D9D8D7D6D5D4D3D2D1D14ED1X13-965x-xx (J74-0963-12) SWITCH UNITPL2PL111ATTSRCAUTOCLK23456RESETAUDAMFM 29R15R14R16W117R1 18C321R104BER102R10

33、3C200R200C506C155C157C156W134C202R205W135C201EBR203 R201R127C153R207 R206 R150R1 14C154R12614 15R125R119R13112814C151BEBER161C163W123C1641R159R413W116R400EBR450R453EBEBR452R454R455C452R402R451W1 14R405R406R404R401R412R409R41 1R410R408W133R403R407W 111R13R3W130W129C103C102801R322R303R301R305R306R304R

34、324R320R160R321BBEW131R323EC14C13R4R6EBW115ER10824R106 R105825W1254041R1 10R1587 W124W118R157W120R156R1 1 1R109W126C351EBEBBER352BR115W128C1016465 R123R137R121R250W132R7 R8R58C54W127R120R122W121R129R54BER52R59BER154EBR155W119R152R151R153R372W113W112TH1C52R57EBC7R5C5R1C1C6C8R2C2R251C251R60ER61BBEEBEB

35、W122R62R64R63EBIC3Q260Q202IC2Q150Q200Q450Q153Q451Q301Q320Q351IC1Q371Q352Q353Q50Q52Q151Q54Q55Q59Q58Q53Q57Q61D260WH1Q261P1D261X14-614x-xx SYNTHESIZER UNIT(J74-0959-22)CN2D200A1Q203 Q201J1J5D403D401D402D409D411D405D404D400D408J4J3D351/W104D150D352D54D100D52Q51Q350D151D152Q370D371IC4D50D51D350 D370D53J2

36、IC5CN1D56Q60D55Q561W46W45W472GNDR261W51W1W3 W26W9R1 16W10R260W15W14W17W26W27W25W30W37REMOW20W18W16W13W824125L9C206L8W105R202W24W42W38W32W40W44C450W21W22C150W11L3W23C152W31C15W35C17L4L521W7C4021C4002C451C401C159C16W43W34W39C18W281756910W12W198131211342W33W29W701112W56W65124.5MX1W78C320W82R138 W83C98W

37、94C58W100C53R371R373C352W57W48W49W52W55W62W36W58W61W50W63W60 W59R353W93W97W81W84W85W87C250W92W89W88W90C10W80W74W77W86C55C56W67W68W51C160C162R370C350R351C1612W41W53W5425W72W69W7124W64R350R50R55W76W79W75W73C5016891R132C4C3115W103W102W96R67C57W95R66W99 W98 R65L1W101BE B EBEBEBEEBB EB EABDFHJCEGI2 1357

38、460V0V 5V0V 5V0V 5V0V 5V0V5V 5V0V0V5V5V0V0V0V5.0V0V 5V5V0V5V0V0V5V5V0V0V or 5.0V5V0V5V0V5V0V0V5.0V0V5.0V0V0V0V0V0V7.3V4.9V7.3V14.4V7.3V0V7.3V7.3V7.2V7.2V0V7.2V7.2V7.3V7.3V0V7.3V14.4V7.3V3.3V7.3V0V5V0V0V5V0V5V0V5V0V5V0V5.0V0V4V0V4V0V5VB LINECAUTION: For continued safety, replace safety critical compo

39、nents only with manufacturers recommended parts (refer to parts list). indicates safety critical components. For continued protection against risk of fire, replace only with same type and rating fuse(s). Toreduce the risk of electric shock, leakage-current or resistance measurements shall be carried

40、 out (exposed parts are acceptably insulated from the supply circuit) before the appliance is returned to the customer.134 3128 7112 16105916151413121110987654321FL+RL+FL-RL-FR-RR-FR+RR+P-ANTP-CONACCB.UGND192317219375R412 100R410 4.7KR409 4.7KR402 10R411100R406 4.7K R407 4.7KR408 1KR403 10076 535 34

41、11232 11100.47u50C401+R401C402 0.47u50+R400 4.7C400 22u6.3+R405 100KR404 100KR413100K17232119L13300u16C50+654321T.MUTEGNDMOTGNDMOT+BPACK INGND10KR2611KR26043K R57 0.01 C52 47KR5530K R5210K R54R370 4.7KR350 4.7KR3511KR3523.3u25C350+22KC3510.1u50C352+R3530.0684.7KR160.22u50C180.22u50C174.7KR150.22u50C

42、154.7KR130.22u50C16R144.7K100u10C159+C1601u50R152 1KR151 4.7KR153 91K430150KC162 1u50+R157 100R158 33KR155R156121110987654321P AN 5WL D ATA SL CLKL C EL D ATA Lu GNDP AN5VRESETILL GNDLAMP +BESD GNDR322 2.2KR301 1KR303 1KR305 1KR304 1K27K47KR320R321R324252336323435373854636728156240C56100u6.35.6KR61+

43、47KR6010u10R5822K100R59C55+C540.01100u16+391KR67375944GND7R160 47K6 5 4 3C1640.012 198 1110 12 13VDD141/2W242213C53(F52-0006-05)F1 (10A)3.3K R501/2W61R371R3731K 1KR37222K40W10412345678910111213141516171819202122232425TA BGNDRR-STBYRR+VCCFR-GNDFR+SVRFRIRRIGNDFLIRLIAC GNDRL+GNDRL-VCCFL+MUTEFL-GNDCDR15

44、9 100K644039383736353433323130292827262524232221201918171615141312111098765432165666768697071727374757677787980414243444546474849505152535455565758596061626364ANT CONP C O NAMP MUTEAMP STBYSVRREQ HCH CONMUTEREQ CVDDGNDGNDFF/REWP ACK INFM+BAM+BSCLMOTORCH CLKDATAHDATACSDPLLCLKPLLDATASDAL CELCLKLDATASL

45、DATALGNDXINGNDGNDHOLDVDDGNDGNDVDDGNDGNDVSSGNDXOUTSW5VILLBEEPROLLOFFNOISE CANCELLERSEL1SEL2EQ MUTEFWD/REVREMOACC DETB.U. DETS METERPANELR110 47KR108 47K21R104 100K3837362728262527R154 750 C161 1u50+4161624144R120 47KR122 47KR123 47kR121 47K2.2K 2.2M546467X14.5MHzC10322PC10222P643 59107 811 12 13R116

46、4.7KR119 2.2KR118 2.2K1K10R306 1K63Q3011522R131 10K R114 22K16R106 1K47K47KR127R1261BUYELACCGNDBLK RED BLU/WHT111092 31P.CONTOUTREAR RVIOLVIOL/BLKREAR LGRN/BLKGRNBLU GRYGRY/BLK141312654WHT/BLK WHT161587ANT. CONTFRONTRFRONTLBUYELREAR LREAR RVIOLVIOL/BLK GRN/BLKGRNGNDBLK91ACCFRONTLP.CON/ANT. CONRED BL

47、U/WHT10 11 122 3 4GRYGRY/BLKWHT/BLK14 1513765FRONTRWHT168AGNDREQ CDATAC8B.U.3CONMUTE45910GNDREQ H12967CLKRch13106RST111275DATAHLch1311128431 239TH10.01 C10147KR125R105R132 100K100K R129R13822K47KR1371KR1 15P147u6.3C320+47R323R102 R1031/2W1/2W 1/2WQ2611K 1/2WQ350Q351,352Q51,52Q151Q153IC3Q320J4J2D400D

48、401D403 D402D408D405D41 1D409D404D50WH1D261D260Q260D52D51Q50B.U. DET.D351D370ANT-CON.Q350D350P-CON.Q351D352Q353Q352Q151D151D152D150J3Q320Q301Q53B.U. 5V AVRQ52 Q51D53D54Q58Q60Q61Q59D56Q153GND LINE SIGNALLINEABCCN2DQ371Q261DRIVERIC1:IC2:TDA7461NDIC3:HD74HC27FPIC4:TDA7384AIC5:LA3161Q50,52,57,61:2SC2412

49、K or2SD601AQ51,261:2SB1443Q53:2SA1036KQ54,58:DTC144EK orUN2213Q55,59,153,352:DTA124EK orUN2212Q56,60:2SB1655(E,F) or2SB1565(E,F)Q201,203,350,370:2SB1277(Q,R)Q301:DTA144EK orUN2113Q320,351:2SA1037KQ450,451:DTC143TK orUN2216D50:S2V20AD51,405,411:MA4068(N)-MD52:MA4051-LD53,260,261,350,351,370,371:AM01Z orERA15-01D54:MA4056(N)-MD55:MA4091(N)-LD56:MA4110-LD100,150-152,352:1SS133D200:MA4051(N)-MTOPVIEWJ4D371Q370D100Q150,200,202UN2212 DTC124EK or:Q151,260,353,371UN2214 DTC114YK or:MA4062-LD400-404,408,409:ILLU