Kenwood-KRFA4020-avr-sm 维修电路原理图.pdf

Please check the tuner PCB number before change C42,43 and X1 with new one .DIMMERP.CALLP.CALLASPEAKERSBMUTEBASS BOOSTTAPE2/MONITORSOURCEDIRECTBALANCESOUNDMULTI CONTROLINPUT SELECTORVOLUME CONTROLDOWNUPAV SURROUND RECEIVERPHONESBANDAUTOMEMORYSTANDBYON / STANDBYPOWER-ONOFF?TRAITREC OUTPLAY INAUXMD / TAPE1TAPE2/MONITORPLAY INREC OUT PLAY INPLAY INPHONOLRFM75GNDAMSPEAKERS+-+R+-+LLRBASUBWOOFERPRE OUTSYSTEM CONTROLSL16(XS 8)AC 220 -240VAC 110 -120VAC 220 -240VAC 110 -120V50 sFM 50kHzAM 9kHzDE-EMPHASISCHANNELSPACE75 sFM 100kHzAM 10kHzSWITCHED TOTAL150W MAXAC 110 -120V/220 -240V 50/60HZAC outlet (E03-0149-05)Lock terminal board(E70-0080-05)Lock terminal board(E70-0068-05)Phono jack(E63-0068-15)Phono jack(E63-1016-05)Slide switch(S62-0034-05)Miniature phone jack(E11-0347-05)Knob (K29-7365-12)Knob (K29-7365-12)Knob (K29-7307-14)Front glass(B10-3475-02)Power cord bushing(J42-0083-05)Knob (K29-7310-03)Knob(K27-2185-04)Foot(J02-1167-03) KENWOOD badge(B43-0302-04)Indicator(B12-0334-14)Phone jack (3P)(E11-0295-05)Metallic cabinet(A01-3533-01)Phono jack(E63-0173-05)Slide switch(S62-0001-05)AC power cord (E30-2592-15)Slide switch(S62-0034-05)Panel (A60-1585-01)Knob (K29-7306-14)AUDIO VIDEO SURROUND RECEIVERAR-304/KRF-A4020/A4020E/A4020WSERVICE MANUAL 1999-1/B51-5501-00 (K/K) 3390Illustration is KRF-A4020 Mtype.RadioFans.CN 收音机爱 好者资料库DIMMERBASS BOOSTTUNERCD1234560789+10TAPE2/MONITORTA/NEWSPTYDISPLAYAUXMULTI CONTROLMD/TAPE1REMOTE CONTROL UNITRC-R0708PHONO672TUNINGDISC SKIP%VOL. DOWNVOL. UPMEMORYS.DIRECTSOUNDBALANCEfi1P.CALL4BANDAUTOA/B +100POWERfifiMUTEDIMMERBASS BOOSTTUNERCD1234560789+10TAPE2/MONITORTA/NEWSPTYDISPLAYAUXMULTI CONTROLMD/TAPE1REMOTE CONTROL UNITRC-R0709PHONO672TUNINGDISC SKIP%VOL. DOWNVOL. UPMEMORYS.DIRECTSOUNDBALANCEfi1P.CALL4BANDAUTOA/B +100POWERfifiMUTEFM (T90-0836-05)indoor antenna AC plug adaptor (1)(E03-0115-05)(1)Loop antenna stand (1)AM loop antenna (1) (T90-0833-05)(J19-3645-05)Remote control unit (1)Remote control unit (1)(A70-1267-05) : RC-R0708.ETQE1(A70-1266-05) : RC-R0709.KPMXBattery cover (A09-1123-08)Battery cover (A09-1123-08)Batteries (R06/AA) (2)*Use to adapt the plug on the powercord to the shape of the wall outlet.(Accessory only for regions where useis necessary.)Resetting the MicrocomputerIf the microcomputer may malfunction (unit cannot be operated,or shows an erroneous display) if the power cord is unpluggedwhile the power is ON, or due to some other external factor. If thishappens, execute the following procedure to reset the micro-computer and return the unit to its normal operating condition.Unplug the power cord from the wall outlet, then plug itback in while holding down the POWER key. Please note that resetting the microcomputer will clear the contentsof the memory and returns the unit to the state it was in when it left thefactory.With the power cord plugged in, turn the POWER keyOFF. Then, while holding down the ON/STANDBY key,press POWER.For U.S.A. and CanadaFor other countriesAR-304/KRF-A40202CONTENTS / ACCESSORIES / CAUTIONSCONTENTS/ACCESSORIES/CAUTIONS.2CIRCUIT DESCRIPTION.3ADJUSTMENT. 6WIRING DIAGRAM.7PC BOARD .8SCHEMATIC DIAGRAM .11EXPLODED VIEW .21PARTS LIST.22SPECIFICATIONS .28ContentsAccessoriesCautionsRadioFans.CN 收音机爱 好者资料库AR-304/KRF-A40203CIRCUIT DESCRIPTION1. BACK UP DATA AND INITIAL STATE 1-1 BACK UP(1) AMP POWER.STANDBY INPUT SELECTOR.TUNER BALANCE .CENTER SPEAKER A RELAY.ON SPEAKER B RELAY.OFF VOLUME LEVEL.-66dB BASS LEVEL .0dB TREBLE LEVEL.0dB INPUT LEVEL .0dB BASS BOOST.OFF SOURCE DIRECT .OFF TAPE2/MONITOR.OFF SL16/XS8.SL16(2) TUNER BAND .FM PRESET CHANNEL.- FREQUENCY.LOWER LIMIT VALUE K1 .FM:87.50MHz/AM:530kHzE1/E3.FM:87.50MHz/AM:531kHzQ1.FM:65.00MHz/AM:531kHz AUTO/MANUAL .AUTO DISPLAY MODE .FREQUENCY E ON THRUST RECEIVING .OFFMODE T1 VOLUME.OFF(-66dB)1-2 INITIAL SETTINGThe initial setting is performed when the AC power cordis plugged into the AC power wall out let while pressingthe power (STANDBY) key.3. TEST MODE3-1 SETTINGTurn the power ON while pressing the BAND key.3-2 CANCELLATIONUnplug the AC power cord from an AC power wall outlet.3-3 STARTING ACTIVE CONTENTS1 The power on state is entered when the power istuned on while pressing the BAND key.All functions are initialized and activated in the alllighting mode.2 All lighting mode is canceled when any main unitskeys are pressed. The normal display obtained whenthe selector is set to TUNER then appears.3 E2PROM check(E,T,Q,type only).Check the reading data and the writing data of theE2PROM after setting the test mode.Display shows blank if the reading data and writingdata are the same. Display shows ”LW” if the differentdata will be written to E2PROM.3-4 ACTIVE CONTENTS1 The mute control is not activated when the mode isswitched.2 The test mode will be terminated by plugging it off thepower source or by initializing it when all the settingswill be initialized.3 During the test mode, it can be operated in a specialmanner that is different from an ordinary operation byusing the keys on the remote control or the main body ,specifically as shown in the following table (3-5CONTENTS).4 Channel space will be no changed in the test mode.3-5 CONTENTS 3-5-1 TUNER FUNCTIONWITH THE SELECTOR ON TUNER (E/T/Q TYPE ONLY)DESTINATION TUNERTYPEBANDRECEIVINGFREQUENCYRANGECHANNELSPACEIFPLLREFERENCEFREQUENCYDSW3(D507)DSW2(D505)DSW1(D504)DSWO(D510)K,PK1(1700)FMAM87.5MHz108.0MHz530kHz1700kHz100kHz10kHz+10.7MHz+450kHz25kHz10kHz0000M.XE1FMAM87.5MHz108.0MHz531kHz1602kHz 50kHz9kHz+10.7MHz+450kHz25kHz9kHz0011MK2(1600)FMAM87.5MHz108.0MHz530kHz1610kHz100kHz10kHz+10.7MHz+450kHz25kHz10kHz0001E,TE3RDSFMAM87.5MHz108.0MHz531kHz1602kHz 50kHz9kHz+10.7MHz+450kHz25kHz9kHz0101QQ1RDSFMLFMHAM65.0MHz74.0MHz87.5MHz108MHz531kHz1602kHz10kHz50kHz9kHz+10.7MHz+10.7MHz450kHz5kHz5kHz9kHz1011DSW0DSW3(DIODE SW) * O: NONE DIODE,1:ADD DIODE2. DESTINATION LIST OF TUNEROPERATION KEYFUNCTIONFL DISPLAYREMARKS(EX.)PTYS LEVEL(1)(SLEVEL),(RF ATT)OFF(1)RF ATT(2)(SLEVEL),(RF ATT)ON(2) (3)(3)(NORMAL),(RF)ATT OFFCYCLEDISPLAYP.CALL UPBASS BOOSTP.CALL DOWNP.CALL FREQUENCYTA/NEWSPI CODEPI 0000PI CODE ON/OFFBass and treble are selected when the sound key ispressed.2 Tuned light3-5-2 AMP FUNCTIONWITH THE SELECTOR ON SOMETHING OTHER THANTUNER1 One touch max,min setting for Audio level.SOUND KEYKEYMASTER VR.BASSTREBLEBAND-89dB-10dB-10dBAUTO0dB+10dB+10dBMEMORY-10dB0dB0dBXS8SL16XS8/SL16TUNED LIGHTSTUNED LIGHTSSWITCHOFFONAR-304/KRF-A40204CIRCUIT DESCRIPTION4. Microprocessor CXP82840-163Q, CXP82832-162Q (X09, IC51)4-1 Microprocessor periphery block diagram diagramFL DISPLAY ED5110GRID16SEGMENTX8X3X2X2X2X2X09, S516SERIAL COMMUNICATIONDATABUSYVOLUMEENCODERX09, S518MULTIENCODERX09, S517SELECTORENCODERX2X38.0MHzCERESETX3X2TUNER MUTEAUDIO MUTEX09, IC52EEPROM-10dB ATTSDSTEREOKS0KS7KR0KR2X110-BT-216GKLED(STANDBY)POWER RELAYSPEAKER A RELAYSPEAKER B RELAYX09, IC51X09, IC3SELECTOR ICTC9164ANREMOCONCXP82840-163Q(E/T/Q TYPE ONLY)CXP82832-162Q(OTHERS)Receiver X09, IC54RDS ICX05, IC2TUNERSAA6579/R(PHILIPS)E/T/Q TYPE ONLYE/T/Q TYPE ONLYLC72131X09, IC2VOLUME ICM62492FPX24C02(XICOR)KEYMATRIXKR0(12)KR1(13)KR2(14)KS0(81)BASS BOOSTS.DIRECTBANDKS1(80)SPEAKER B*DIMMER/PTY*P.CALL UP/DISPLAYKS2(79)SPEAKER APOWER*P.CALL DOWN/TA NEWSKS3(78) - - -KS4(77) - -DSW3(507)KS5(76)DSW2(D505)DSW1(D504)DSW0(D510)KS6(75) TAPE2/MONITORSOUNDAUTOKS7(74)MUTEBALANCEMEMORYPTY,DISPLAY and TA/NEWS keys are only RDS version(E/T/Q).AR-304/KRF-A40205CIRCUIT DESCRIPTIONPin No.Pin name I/ODescriptionActive1,2G9,G10OFL grid control (9,10).3NC-Unused.4RDS,CKIRDS IC clock input control. (E/T/Q type only)5RDS,DTIRDS IC data input control. (E/T/Q type only)6NCIUnused.7VOL.ENC.AIVolume encoder A (CW) signal.8REMOCONIRemote control signal input.9VOL.ENC.BIVolume encoder B (CCW) signal.10,11NC-Unused.1214KR0KR2IKey return (02).15PROTECTIProtection detection signal input.H: Protection ON16S.DATAI/OSerial communication data.17S.BUSYI/OSerial communication busy.18E2.DATAI/OE2 PROM data.19E2.CLKOE2 PROM clock.20SEL.ENC.AISelector encoder A(CW) input.21SEL.ENC.BISelector encoder B(CCW) input.22MULTI.ENC.AIMulti control encoder A(CW).23MULTI.ENC.BIMulti control encoder B(CCW).248/16ISerial communication 8bit/16bit changeover.2527NC-Unused.28VDD-Analog power supply (+5V).29S.LEVELISignal level A/D input. (E/T/Q type only)3032NC-Unused.33PLL.DOIPLL IC DO signal input. (E/T/Q type only)34PLL.STITUNER stereo signal input.L: STEREO35PLL.SDITUNER SD signal input.L: TUNED36RCV.CEIReceiver chip enable signal input.L: ENABLE37AVSS-Analog ground.38RESETIu-Com reset.39EXTALIMain clock(8MHZ).40XTAL-Main clock(8MHZ).41VSS-u-Com ground.42TX-Unused.43TEXIGround.44VDD-Analog power supply (+5V).45VFDP-FL power supply(-33V).46SEL.STBOTC9164AF strove.H: LATCH47SEL/PLL.DTOSelector/PLL IC data signal output.48SEL/PLL.CKOSelector/PLL IC clock signal output.49PLL.CEOPLL IC CE signal output.50T.MUTEOTuner mute control.L: MUTE ON51A.MUTEOAudio mute control.L: MUTE ON52NC-Unused.5310dB.ATTOVolume 10dB attenuator control.L: ATT ON54VOL.DTOVolume IC(M62492FP) data control.55VOL.CKOVolume IC(M62492FP) clock control.56VOL.STOVolume IC(M62492FP) strove control.5759NC-Unused.60RELAY.AOSP. relay A control.H: RELAY ON61RELAY.BOSP. relay B control.H: RELAY ON62,63NC-Unused.64POWER.RLYOPower relay control.H: RELAY ON65STANDBY.LEDOSTANDBY LED control.H: LED ON6671NC-Unused.72LIMITEROOutput power control at SP. (A+B). K/M/X only.73S.W MUTE-Unused.74,75KS6/KS7OKey scan 6,7.7681P1/KS5P6/KS0OFL segment 16/key scan 50.8288P7P13OFL segment 713.89VDDOu-Com +5V power supply.9092P14P16OFL segment 1416.93100G1G8OFL GRID 18.4-2 Pin descriptionsAR-304/KRF-A40206ADJUSTMENTNo.ITEMINPUT SETTINGSOUTPUTSETTINGSRECEIVERSETTINGSALIGNMENTPOINTSALIGN FORFIG.1DISTORTION(STEREO)(C)98.0MHz 1kHz, 68.25kHz dev. Selector: L or R Pilot : 6.75kHzdev. 70dBf (ANT. input)(B)98.0MHzIFT (TUNERUNIT: A1)Minimum distortion(L or R)(a)2TUNING LEVEL(A)98.0MHz MONO 1kHz, 75kHz dev. 25dBf (ANT. input)(B)MONO98.0MHzVR1(TUNER UNIT)Adjust VR1 andstop at the pointwhere ED51(TUNED) goes on.(a)1DISCRIMINATOR(A)98.0MHz 1kHz, 40kHz dev. Connect a DCvoltmeterbetween CN21 and CN2 2(TUNER UNIT)MONO98.0MHzL4 (TUNER UNIT)0V(a)3DISTORTION(STEREO)98.0MHz(C) 1kHz, 40kHz dev. Selector : L or R Pilot : 6kHz dev. 70dBf (ANT. input)(B)AUTO98.0MHzIFT(TUNERUNIT : A1)Minimum distortion(L or R)(a)2DISTORTION(MONO)(A)98.0MHz 1kHz, 40kHz dev. MONO 70dBf (ANT. input)(B)MONO98.0MHzL5 (TUNER UNIT)Minimum distortion(a)41IDLE CURRENTVolume: 011 mVVR1 (L)VR2 (R)Connect a DCVolumeteracrossCN11 (L)CN12 (R)TUNING LEVEL(A)98.0MHz MONO 1kHz, 40kHz dev. 25dBf (ANT. input)(B)MONO98.0MHzVR1 (TUNER UNIT)Adjust VR1 andstop at the pointwhere ED51(TUNED) goes on.(a)(b)FM SECTION : EXCEPT E,T,Q type SELECTOR : FMFM SECTION : E,T,Q type only SELECTOR : FM Adjust NO.1 and NO.2 repeat.70dBf (ANT. input)AUDIO SECTIONREC OUTPLAY INAUXMD / TAPE1TAPE2/MONITORPLAY INREC OUT PLAY INPLAY INPHONOLRGNDAMSPEAKERS+-+R+-+LLRBASUBWOOFERPRE OUTAC 220 -240VAC 110 -120VAC 220 -240VAC 110 -120VSWITCHED TOTAL150W MAX(A)(B)(C)(D)AM SGFM-MPX-SGFM-MPX-SGPOLAR SGAC voltmeterOscilloscopeDistortion meterDummy antenna(b)(a)Dc voltmeterCN11, 12SYSTEM CONNECTIONSAR-304/KRF-A40207WIRING DIAGRAM151151AM: 9kHzFM: 50kHz 50uSAM: 10kHzFM: 100kHz 75uS2121XS8SL16SBUSYSDATA31311131(K,P)(M)(Q)(X)(T,E): AC120V 60Hz: AC110-120V/220-240V50/60Hz: AC220V 50Hz: AC240V 50Hz: AC230V 50Hz21F2F1F3120V110-240V220-151511F4F51661152121114431CN1CN7GNDCH SPACEDE-EMPHASISS1J1AM ANTFM75S1POWERSWWH1CN2Rch 4+2Lch+3Rch+1Lch+J5FRONTSPEAKERS ASPEAKERS BFRONTS4SYSTEMCONTROLSWJ6SYSTEMCONTROLPRE OUTJ4SUB WOOFERLch 5Rch 6Lch 3Rch 4J3Lch 1Rch 2Lch 1Rch 2PHONOJ1MD/TAPEPLAY INTAPE2/MONITORREC OUTPLAY INLch 3Rch 6Lch 5Rch 4J2REC OUTRch 2Lch 1MD/TAPEAUXCDCN8CN9WH51CN10CN1J8ACOUTLETUSED(M)TYPE(E,E2)TYPEUSEDT1S2S3WH4CN6WH2WH3DESTINATIONU.K.EUROPECOUNTRYTE2-71UNIT No.ABB.UNIT No.KRF-A4020 (X05-5052-71)COUNTRYRUSSIAQABB.3-81DESTINATIONKRF-A4020W (X05-4983-81)EUROPEE12-71ABB.COUNTRYDESTINATIONKRF-A4020E (X05-4982-71)COUNTRYUNIT No.ABB.GENERAL MARKETEUROPEU.K.AUSTRALIATE2-71MX0-210-71CANADAPKRF-A4020 (X05-498X-XX)DESTINATIONUNIT No.DESTINATIONAR-304 (X05-5050-10)COUNTRYU.S.A.UNIT No.ABB.K0-10KRF-A4020W (X09-6143-81)DESTINATIONCOUNTRYRUSSIAABB.Q3-81UNIT No.KRF-A4020 (X09-614X-XX)GENERAL MARKETDESTINATIONKRF-A4020E (X09-6142-70)DESTINATIONEUROPECOUNTRYEUROPEAUSTRALIAU.K.COUNTRY2-70EUNIT No.ABB.E12-70MTX0-210-510-71UNIT No.ABB.AR-304 (X09-6310-10)DESTINATIONCOUNTRYU.S.A.CANADAABB.KP0-10UNIT No.KRF-4020W (X09-6143-81)DESTINATIONCOUNTRYRUSSIA3-81UNIT No.QABB.COUNTRYDESTINATIONKRF-4020E (X09-6142-70)EUROPEU.K.EUROPEAUSTRALIAGENERAL MARKETKRF-4020 (X09-614X-XX)DESTINATIONCOUNTRYCANADADESTINATIONCOUNTRYU.S.A.X0-71UNIT No.2-70E1ABB.2-700-51ET0-21UNIT No.MABB.UNIT No.0-10KPABB.AR-304 (X09-6310-10)WH52TAPE2/MONITORE2E3HEADPHONEABB.COUNTRY2-710-51EUROPEU.K.ETKRF-A4020 (X09-631X-XX)UNIT No.DESTINATIONJ7UNIT No.KRF-4020 (X09-631X-XX)EUROPEU.K.TEDESTINATIONCOUNTRYABB.0-512-71TUNER UNIT(X05-XXXX-XX)USED (M)TYPE(X09- ) (F/8)USED EXCEPT (K,P)TYPE(X09-6XXX-XX) (A/8)(X09- ) (B/8)DISPLAY UNITAUDIO UNIT(X09- ) (C/8)(X09- ) (G/8)(X09- ) (D/8)(X09- ) (H/8)(X09- ) (E/8)USED EXCEPT (M)TYPEUSED (M)TYPEKRF-A4020/A4020E/A4020WAR-3048ABDCE2135746Refer to the schematic diagram for the value of resistors and capacitors.PC BOARD(Component side view)R70R40C53OFFONW5W6W7W4W19W22W21W20W14W17W10W1W3(W)(G)AM RFVTPLLFM IFAM STEREOFM DET MPXVrefTUNEDFMMPX.FIL.T.METERC17W24C28C38C29C37W9W16VR1CF1CF2C10W13W23CF3L9L2R50R44R71C49C46C72C32C14C15C67C55W25L3C62C66C65W8W11W15L1C73C7R81C27C16C19C21C23L6L7C48R41L4R77R61C59R2X2X1111221211511816302151E1CN1D6A1IC1D4D3D9D5IC2CN2J1S1CH. SPACEDE-EMPHASISANTENNAX05-498X-XX/X05-505X-XXC69D16R90W86R80R82R12C77R60R59R58W52C86E BEBD7D13Q14Q15C88R89C87R43C6C78C75C11C39C42C52C47C50C51C43C44R55R56R53R54R57R51R52R49R42R11R1R7C76R83R88D1C84C35R32/W60C8C36W85C5C1C2C3C82C12C25C26C24C41C40C30C22C18C20R14R15R16R10R4R5R8R9R6R35R23R28R25R27C31C79W51W80R85C85R86R87E BEBQ2Q1D11C92C93C91C89C83R29R48R34R33R84R79R47W84R45R46R31R36W62R64R65R30C80C34C33R37E BEBE BQ3Q4Q7C68W2L5C54R75C90C58C56C57C61C60R66R63R62R69R67R68R18R19R20C63W59W81C81C45W56R17R39R38R76W83R74R78W61W55R72C71R73C70W82C64W5416918E BEBE BE BEBEBQ11Q10IC3Q9Q8Q12Q6D8TUNER UNITFHJLNGIKMO2135746Refer to the schematic diagram for the value of resistors and capacitors.PC BOARD(Component side view)910(ALL)XS8SL16W54W170W169R49R73C88R109C94C104C118W94W141C136C135R91R92R204R203C32W140C84C83R145R143R144C110C137C79W198W128R182R188C134W118R45C57C58R208C66C65C67C68C119R94R90R89W165R152C133W78W20R136R66R206R65R205C27R114C31C126C28R163R164C30C29R147R146R148W116W95R83R50R74R84W134W166C125C117W90W167W168W104SGNDSDATAGNDBUSYW121W89W97W37W42W11W27W58W162W40R82R119R118R75R76R81R99R168R100R111R117R93R70R141R63R64R156R142R67R69R68W66C75W105C73C74C71C72C59C60C129C130W119W45C123C124C115C120C63C64C3C33C35C34W12W23C36C51C44C4C52C43C37C8C7C38C87C86C108C103C114C116C100C80C82C85C95C81C93C92C102C101C107C90C78C89C91C54C9C53C56C10C55C50C6C42C49C5C39C45C40C46C1W83W85C105C106C2C122C69C20C21C22C17C18C19C23C76C77C121C70C24C25C26C98C99W65C48C4