Kenwood-KRC-2902-Service-Manual电路原理图.pdf

© 2002-1 PRINTED IN JAPANB51-7882-00 (N)1089CASSETTE RECEIVERKRC-2902YA/GSERVICE MANUAL45Wx4HIGH POWERKRC-2902LOUDPWROFFAMEAUTOCLKSRCAUDT. CALLMENUWIDE BANDREWPRFFOGLever(D10-3031-04)x2Plastic cabinet assy(A02-1486-13)Mounting hardware assy(J21-9491-13)DC cord(E30-4790-05)Antenna adaptor(T90-0523-05)Escutcheon(B07-2124-02)Knob (ATT)(K25-1388-03)Cassette lid(A53-1638-13)Panel assy(A64-2520-02)KRC-2902YA/G2BLOCK DIAGRAMIC1KEYPAN 5VMUTEB.U. DET. B.U.ACCPOWER ICEQ. AMP.CH ISO AMPNC/MPX/E-VOL.FRONT LchFRONT RchREAR LchREAR RchJ2LCD DRIVERLCDMAINTAPE MECHA.IC5IC2IC4, Q151IC3,Q150SP OUTPAN IN SWACC DET.P-CONT.J2IC1FM+BQ200,201AM+BQ202,203AM BPFFM BPFQ320Q50Q350-353Q53SW 5VQ54-57COM+BQ58-61ILLUMI.B.U. 5VQ51,52SYSTEM u-COMRST SWQ301MOTOR SWRSTQ260,261ED1 Q1FM ANTAM ANTRF GNDFM+BAM+BOSC GNDOSC GNDOSC GNDVTPLL +BIFC OUTSDASCLDIG GNDIF1+BIF1 GNDS-METERIF2 GNDSDFM+BSW5VACC DETB.U. DETSCLMUTESDAP CONPANELHOLDL CLKL DATASL DATALFWD/REVMOTORRchCOMLchMP INAMMPXOUT RROUT LROUT RFLEVELSCLSDAOUT LFSTBYMUTERchLchT-MUTEFWDREVB.U.5VB.U.8V B.U.S MUTE465B.U.5VAM+BVDD 5VPACK INL RESANT CONBEEPSVRAMP. STBYSVRAC GND (BEEP)RchLch8VRF GNDOSC GNDIF2 +BAUDIO OUT8VS-METERSDPLL CLKPLL DATAPLAYHEADRL55.6mVB.U.5VSW5V8VB.U.5VAM: 170mVFM: 400mVTAPEPACK IN(FF/REW)AMP. MUTEFF/REWB.U.5VILLUMI.(X16- )(X14- )MA15VD200P-CONT./ANT-CONT.KRC-2902YA/G3a71 SYNTHESIZER UNIT (X14-6872-73)COMPONENTS DESCRIPTIONRef.No. Function OperationIC1 SYSTEM µ-COM Controls the unit.IC2 E -VOLUME Controls the volume and selects source.IC3 M UTE LOGIC Controls the mute output.IC4 POWER AMPLIFIER For the speaker output.IC5 EQUALIZER AMPLIFIER For the cassette tape's signal.IC6 RESET Resets the power.Q49 A CC DETECTION SW Outputs “H“ during the ACC off.Q50 BACK-UP DETECTION SW Outputs “H“ when the back-up voltage is under 9.2V.Q51,52 BACK-UP 5V DRIVER Works when back-up current exists.Q53 P.ON 5V SW Works during the power on.Q54,55 8V SW Works during the power on.Q56,57 8V DRIVER Works during the power on.Q58,59 ILLUMI +B SW Works during the power on.Q60,61 ILLUMI +B DRIVER Works during the power on.Q150 E-VOL MUTE SW Works when the back-up current is detected or the changer mute works or system µ-com mute works.Q151 SVR FORCED DISCHARGE SW Works when the amplifier mute works.Q201 FM +B SW Works during FM mode.Q203 AM +B SW Works during AM mode.Q260 MOTOR +B SW Works during the tape mode.Q261 MOTOR +B DRIVER Works when Q206 works.Q301 CD-CH RESET SW Works when the power is reset and the reset SW works.Q320 PANEL 5V SW Works when the back-up current exists and the panel is attached on the unit.Q350 P.CON DRIVER SW Does not work during the power off and the ALL OFF.Q351 P.CON PROTECTION SW Works when the P.CON is short-circuited on the GND.Q352 P.CON PROTECTION INHIBIT SW Inhibits the protection SW in a moment during the P.CON on.Q353 P.CON DRIVER SW Does not work during the power off and the ALL OFF.KRC-2902YA/G4a71 µ-COM (IC1 : X14-)Pin No. Pin name I/O Description Processing Operation1 PANEL I Panel detection. “L“ : Panel exists.2 L CE O LCD driver chip enable. -3 L RES O LCD driver reset. -4 AVSS - GND. -5 R DATA I RDS data. -6 R QUAL I RDS receiving. -7 AVREF 1 - Reference voltage. -8 I C2 SEL 1 I Selector. “L“ : Normally.9 I C2 SEL 0 I Selector. “L“ : Normally.10 - - - -11 L DATA L I LCD driver communication data. -12 L DATA S O LCD driver communication data. -13 L CLK O LCD driver communication clock. -14,15 - - - -16 DATA C I Changer communication data. -17 DATA H O Changer communication data. -18 CH CLK I Changer communication clock. -19-26 - - - -27 MOTOR O Cassette tape motor SW. -28 FF/REW I Cassette tape FF/REW detection. “L“ : FF or REW works.29-31 - - - -32 SD I Signal detection. “H“:Signal exists. “L“ : Signal does not exist.33 VSS 1 - GND. -34 - - - -35 PLL CLK O Front-end communication clock. -36 PLL DATA I/O Front-end communication data. -37 AM +A O AM power supply SW. -38 FM +B O FM power supply SW. -39 IC2 DATA I/O E-volume communication data. -40 IC2 CLK O E-volume communication clock. -41 AFC O FM noise detection /Time constant SW. -42 MUTE O Mute control. -43 AMP MUTE O Power amplifier mute. -44 - - - -45 CH CNT O Changer control. -46 REQ H O Changer request. -47 - - - -48 SVR O SVR control. -MICROCOMPUTER'S TERMINAL DESCRIPTIONKRC-2902YA/G5Pin No. Pin name I/O Description Processing Operation49 AMP STBY O Power amplifier stand-by. -50 BEEP O Buzzer signal output. -51,52 - - - -53 P.CONT O Power control SW. -54 ACC DET I ACC detection. -55 B.U.DET I Back-up detection. -56 P.ON O Power SW. -57 ILLUMI O Illumination SW. -58 FWD/REV I Cassette mechanism FWD/REV detection. -59 - - - -60 RESET I System reset signal input. -61 SEL 1 I Destination SW. -62 R CLK I RDS clock. -63 REQ C I Changer request. -64 PACK IN I Cassette tape pack-in detection. -65 KEY-REQ I Key signal input detection. -66 SEL 0 I Destination SW. -67 VSS 0 - GND. -68 VDD 1 - 5V power supply. -69 X2 - Main system clock. -70 X1 I Main system clock. -71 IC - GND. -72 - - - -73 XT1 - 5V power supply. -74 VDD 0 - 5V power supply. -75 AVREF 0 I A/D converter reference voltage. -76 S METER I S-meter detection. “H“ : S-meter exists. “L“ : S-meter does not exist.77 PHONE I -Navigation mute : 2.5V or more.Telephone mute : 1V or less.78 NOISE I FM noise detection. -79 AV CONT O A/D converter reference voltage. -80 - - - -MICROCOMPUTER'S TERMINAL DESCRIPTIONKRC-2902YA/G6TEST MODE / ADJUSTMENT(2-LINE TAPE)BABA(FWD)(RVS)HEIGHT(FWD)HEIGHT/AZIMUTH(FWD)HEIGHT/AZIMUTH(RVS)TAPE SPEEDHEIGHT(RVS)F ''FRR1. 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 testmode.2. How to release the test mode Simply reset the unit. (NOTE) The test mode is not canceled by ACC OFF, powerOFF, momentary power down or the panel off.3. Audio adjustment Set the volume level to -10dB (which is shown as “30“ on thedisplay). Loudness OFF. The BASS/TREBLE and BALANCE/FADER can be set tothe full-boost/full-cut and full-front/full-rear each by pressingthe “Track UP“ / “Track DOWN“ keys. Sound coordination doesn't appear for the feed.TEST MODEADJUSTMENTHead Angle AdjustmentHead height alignment procedure During FWD transport adjust screws F and F' so that line Aof 2-LINE TAPE passes trough the center of the head shieldplate (core center area) During RVS transport adjust screws R and R' so that line Bof 2-LINE TAPE passes trough the center of the head shieldplate core (center area) After the alignment above, reverse the transport directionand check the FWD alignment again. If it is deviated,perform alignment again. (Tape used : SCC-1659,manufactured by A-BEX)A B C D E F G H I J123456778PC BOARD (FOIL SIDE VIEW) (COMPONENT SIDE VIEW) (FOIL SIDE VIEW)Refer to the schematic diagram for the values of resistors and capacitors.4.3320MHzW24W64W76W78R200R202W36R55W73W69W12W99R67W58W104C4R350 R370W67W57W70C209L10W66W68W4W6W72W71W7W85W80W39W42W45W48W50W101W102W2W200R51R65R351R353R66X1C50C17C18C160C152C55W15C15C16C161C350C352C503C162C500C450C451C150C159C56C58C53C57W97W98W103W53W43W51W28W10X2W17R501W3R502R500R261L5R260L4C402C400C401W54W47W95W93W89R119W13W61W62W14C9C250C10W8W9W33W23W27W30W32W37W26W55W56R263R262W22W77W63W65W21R252W105W52W100W94W96W92W91W90W87W59W60W20W25W29W31W35 W19W11W82W79W83W40W38W41W84W81C3W34W18W49W46W44R120W88W74W754.19MHzTP5VDGS-MTRPDAPCK2DACCK DTH DTCCMP2CKL1RESL8L7R100L12L6L3W5R1071681158161912252415761092 3 4 8 12 11 13LR124BEBEEBBEBE1112 12BEBEA1Q60Q56D370D410D50D405D371D352Q51Q350D380D401D400D56D52D51D55D54D408D409D350D351D53Q261Q201Q203D404D200D260P1IC5D261J1J5J4J2J3IC4D150D152D151WH1D100CN1X14-6872-73 (J74-1319-02)W170C251R156R15W158R14R62W159R57R59W157R60C52C163R161R159R162R16 R13W174R381C380R61R251R151C214R503C600 C601W171R125R123C13C14R58R52R54R106R112C164R352C154C153C351TH1R504R155R154R153R322R401 R400R380R408 R409R407 R406 R412R410 R411R303 R302R304R306 R305R403R301R402C504C54C502C505R63R64W162 C501R1C1R201R203R150W153C452C202C204R455R453R454R451R450R452R205R141R2 C2C5R382C6C157R111R113R404R103R108C151C156C155R160R206R207C158C506R8C8R4R6R7C7R5R133R323R110R158C101C102R105C103W161W160R48R320R321R140W173W154R124R122R118R152R121R117R157R405R143R104W169W168W167R3R250W165R49R413W156R142W166 W164R101R102C104W16311415288147141134560120806121401816 9BEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEQ61IC1Q52Q59Q58Q57Q153Q151Q150Q55Q49Q54Q53Q50Q500Q502Q501Q353Q301Q320Q352Q351IC6IC7Q451 Q450Q260IC3IC2Q503PL1PL2FMAMAUDRST654321ATTVOLSRCTI154CLKD15D1D2D3D4D5D6D7D8D9D10D11D12D13D14X16-1512-7x (J74-1300-02) X16-1512-7x (J74-1300-02)C5C2C3C4R2R3R4R5R6R7R8R9R21R10R11R12R13R14R15R17R18C1124416465 8040 25111221BEQ1IC1D17J1Ref. No addressIC1 3JQ1 4JX16-1512-7xRef. NoaddressRef. NoaddressIC15CQ594AIC24EQ603AIC34DQ613AIC42DQ1504DIC54BQ1513DIC65CQ2014EQ494CQ2034EQ514BQ2616EQ504BQ2605EQ524BQ3015CQ534BQ3206BQ543BQ3503CQ553BQ3514CQ562AQ3524CQ573AQ3534CQ584AX14-6872-73SYNTHESIZER UNIT SWITCH UNITA B C D E F G H I J1234567AM+B1923202122AUDIO OUTSDS-METERIF1+B141718VDD 5VIF2+B1516SDASCLDIG GND10111213OSC GNDVTPLL+BIFC OUT789OSC GNDOSC GNDOSC GNDFM ANT3456AM ANTRF GNDFM+B12RF GND16 15 14 13 12 11 10 9876543 2 1FL+ RL+FL- RL- FR-RR- FR+ RR+P-ANT P-CONACCB.UGND19231721937 5L1C50 3300u16+0.013.3K 1/2W33KR5210KR54R370 4.7KR350 4.7KR351 1KR3523.3u25C350+22KC3510.1u50C352 +1K0.068100u10C159+C16010u16R152 1KR151 4.7K91KR153180KC162 1u50+R157 100R158 33KR155 430R156232425260.01C15147u10C150+L3 4.7uH0.1C158R150 4.7K0.1C155C153 0.015C154 0.220.033150PC157C1560.220.2224IF1 GNDIF2 GND0.01C2020.01C20422KR20322KR2011KR2021KR200R20515035364.7uH7632C209 47u10+123450.047C25110KR2511500PC21500PC122KR122KR2121110987654321PAN 5WLDATASL CLKL CELDATALu GND PAN5VRESETILL GNDILL +BESD GNDR322 2.2K R301 470 R302 470R303 1K R304 1K27K 47KR320R321100u16C57+R62100u10C58+1KR641KR63R652.2 1/2WR662.2 1/2WR207 2.7K R206 4.7K3 448 49431312211 6055C56100u6.35.6KR61+47KR6010u10R5822K100R59C55+C540.01100u16+1KR6750GND7R162 47K6543C1640.01219811101213VDD14+0.0224C7120KR7100u10100+100PC5C9R5 6.8KR3L IN8L NFL OUT7 6C347u6.3310R250 120KR8C250100u10R6 6.8K+C80.022C10100u10R4100GND VCCR OUT5 4100PC6R NF3 2+C447u6.3R IN14039C533738F1 (10A)R159 100K28 27 26 25 24 23 22 21 20 18 17 16 15ACOUT LACOUT R OUT LFOUT RF OUT LR OUT RRVDD GND SDAS MUTEQUALMUX R MUX L1 2 3 4 5 6 7 8 910 11 12 13 14VREF CREF TAPE LTAPE RCDR CDGND CDL PH- PH+ AM MPX LEVEL MP IN MP OUT1C14C13L452mH56 55 54 53 52 51 50 49 48 47 46 45 44 43 4240393837363534333231302928272625242322211 2 3 4 5 6 7 8 910 11 12 13 14 15 166162636465666768697071727374757677787980P.ONB.U.DETACC DETP.CONTBEEPAMP STBYSVRREQ HCH CONAMP MUTEMUTEAFCPLL DATAPLL CLKVSS 1SDFF/REWMOTORPANELL CE L RES AVSSRDATAR QUALIC2 SEL 0 LDATALLDATASDATACSEL 1R CLKPACK INVDD 1X2X1ICXT1VDD 0S METERR306 1K22TH1P110R3231/2W1/2WQ151Q32010KQ54,55Q15016DATAH17CH CLK18 19 20IC2 SEL 1AVREF 1L CLK11 12 1328274.7KR117R119 2.2KR120 1KR121 10K1K1KR123 10KR122R124IC2 CLKIC2 DATAFM+BAM+B3635393738403241REQ CKEY-REQSEL 0VSS 0AVREFOPHONENOISEAV CONTR1062.2K47KR1056.8KX1C10215P15PC1033215758596010R1000.022C104RESETFWD/REVILLUMI55R5547K47KR57C525454R353Q351534850 49 43T-MUTER38010K0.01C38022KR381R104 47KR140 47K2.2KR142 47KR110 100KR113 2.2KR102L RESR305 1K35757R49100K22KR48532131115 7 913 15 17 19 23 25TABRR+RR- FR- FR+ FRIGNDRLI RL+ RL- FL-FL+ CDGND2 4STBY6VCC8GND10SVR12RRI14FLI16ACGND18GND20VCC22MUTE24GND4.7KR140.22u50C167504.7K0.22u50C18R16 4.7K0.22u50C15R131u50+0.22u504.7KR15C1717 19 232124252326R154C16119SCL1u50C152+L64.7uH4.7uHL7L10 0.01C2145860RL-BUYEL9TEL MUTEBRN121110VIOL/BLKGRN/BLKRR+RR-RL-VIOL151314RL+GRN161357RR+ RL+FL+ FL-FR-RR- FR+22685741368GND4ACCP-CONBABLK1ANT. CONP. CONBLU/WHTBLU/WHTRED423GRY/BLKWHT/BLKGRY765FR-FR+FL-WHT8FL+R261R262 47KGND1PACK IN21/2W1KR26010K47KR263GND5MOT3MOT4T.MUTE62827+BGNDIC4Q58,59Q60,61Q301Q261Q350,353Q352Q51,52Q56,57763 5 7 947KR252R382 47KR5147KR1334.19MHz100KR111R112W200L84.7uH12345C101 0.0158+B+B+B+B+B+B+B+B+B+B+B+B+B+B+B+B+B+B+B+B+B+B+B+8V +8V+8V +8V+5V+8V+8V+8V+8V+8V+8V+5V+5V+5V+5V +5V+5V+5V+5V+5V+5V+8V+8V+8V+5V+5V+5V+5V+5VP5VP5VP5VP5V P5V P5V P5V P5V+5VIC3IC5KRC-2902YA/G (1/2)SYNTHESIZER UNIT (X14-6872-73)IC4IC2IC1AIC6(E30-4790-05)DC147K47K22K22K22K47K10K47K47K47K10K22K22K47K22K47K22K22K10K47KA1J2D50D261D52 D51Q50D351D370ANT-CON.Q350Q351D352Q353Q352Q151D150D152D151Q150Q201D200Q203ANTJ1CN1J3Q320Q55Q54D55Q56Q57SWQ301Q53Q52Q51D53D54Q58Q60Q61Q59D568VIC1 :IC2 : TDA7400DIC3 : HD74HC27FPUPD780058GC425IC4 : TDA7386IC5 : LA3161Q49,50,52,57,61 : 2SC2412K or2SD601AQ51,261 : 2SB1443Q53 : 2SA1036KQ54,58 : DTC144EK orKRC104SUN2213 orQ55,59,352: DTA124EK orUN2112 orQ56,60 : 2SA2057 or2SB1548(P) orQ201,203,350 : 2SB1277(Q,R)Q301 : DTA144EK orUN2113Q320,351 : 2SA1037KD50 : 1N5393G-M6 orS2V20AD51 : MA4068(N)-M orHZS7A3LD52,200 : MA4051(N)-MD53,260,261,351,370,371:AM01Z orERA15-01D54 : MA4056(N)-MD55 : MA4091(N)-MD56 : MA4110-LD100,150-152,352: 1SS133J1X16-2/2D371Q150UN2212 orDTC124EK or:Q151,260,353UN2214 orKRA103S2SB1655(E,F) or2SB1565(E,F)KRC103SKRC107SDTC114YK or:ILLUMI+B SWILLUMI+B DRIVERDRIVER SWP.CON PROTECTION SWP. O N5V SWSYSTEM u-COMDISCHARGE SWPANEL 5VSW8VDRIVEREQUALIZERAMPLIFIERE-VOLUMEFM+BSWAM+BSWTUNERE-VOLMUTE SWQ49P-CON.P.CONSVR FORCEDDETECTIONACCD380D100PST9135NRIC6 :MOTOR+B SWQ260MOTOR+BDRIVERD260WH1Q261MUTE LOGICPOWERANPLIFIERRESETRESETCD-CHSWP.CON PROTECTIONINHIBIT SWBACK-UP5V DRIVERSWDETECTIONBACK-UPSWDSM1SD2 orD380 MA4047-M: B LINEGND LINESIGNAL LINE1.3V 0.8V 3.5V 0V 8.0V 3.5V 0.8V 1.3V0V4.4V0V5V0V5V0V5V0V4.0V4.0V 4.0V4.0V 4.0V 4.0V 5.0V0V3.5V0V8.0V4.0V0V5V5.0V0V5V0V 5.0V0V or 5.0V0V5V0V5V0V0V5V5V0V0V5V5V0.9V0V or 5.0V5V0V0V or 5.0V0V5.0V0V5.0V5.0V0V4V0V4V1.6V14.4V4.8V0V 7.3V0V 7.2V7.2V 3.3V14.4V0V7.3V7.3V 7.3V7.3V 7.2V 0V 7.2V 7.3V 7.3V 7.3V 7.3V0V7.3V0V0V2.5V5.0V0V4V0V5.0V5.0V+B+B1 2 63 4 5ME1 (D40-1136-05) HD1S3MM1S1S2FWD/REVGNDHEAD RHEAD COMHEAD LT.MUTEGNDMOT GNDMOT+BGNDPACK INLch1 2FWDREVRchRef.9963 4 5CAUTION : For continuedsafety, replace safety criticalcomponents only with manu-facturer's recommended parts(refer to parts list).Indicates safety criticalcomponents. To reduce therisk of electric shock, leakage-current or resistance measure-ments shall be carried out(exposed parts are acceptablyinsulated from the supply cir-cuit) before the appliance isreturned to the customer. DC voltages are as mea-sured with a high imped-ance voltmeter. Values mayvary slightly due to varia-tions between individualinstruments or/and units.!K L M N O P Q R S T1234567+5V +5V+B+B+B+B +B121110987654321PANEL SWL-DATA SL-CLKL-CEL-DATA LL-RESu-GNDPAN 5VRSTILL-GNDILL+BESD-GND64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 414039383736353433323130292827262512 3 4 5 6 7 8 9101112 13 14 15 16 17 18 19 202122 23 2465666768697071727374757677787980KS6 KS5 KS4 KS3 KS2KS1COM3 COM2COM1S55 S54 S53 S52S51S50 S49 S48 S47 S46 S45 S44 S43 S42S41S40S39S38S37S36S35S34S33S32S31S30S29S28S27S26S25KEY S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15 S16 S17 S18 S19 S20 S21 S22 S23 S24KI1KI2KI3KI4KI5VDDVDD1VDD2VSSTESTOSCRESDATA LCECLDATA SKI1KI2K