Kenwood-KRFA-4020-Service-Manual电路原理图.pdf

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1、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-ONOFFCRTRAITREC OUTPLAY INAUXMD /

2、 TAPE1TAPE2/MONITORPLAY INREC OUTPLAY INPLAY INPHONOLRFM75GNDAMSPEAKERS+-+R+-+LLRB ASUBWOOFERPRE OUTSYSTEM CONTROLSL16(XS 8)AC 220 -240VAC 110 -120VAC 220 -240VAC 110 -120V50sFM 50kHzAM 9kHzDE-EMPHASISCHANNELSPACE75sFM 100kHzAM 10kHzSWITCHED TOTAL150W MAXAC 110 -120V/220 -240V50/60HZAC outlet (E03-0

3、149-05)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 (K29-7310-0

4、3)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

5、RECEIVERAR-304/KRF-A4020/A4020E/A4020WSERVICE MANUAL1999-1/B51-5501-00 (K/K)3390Illustration is KRF-A4020 Mtype.DIMMERBASS BOOSTTUNER CD1 2 34 5 60789 + 1 0TAPE2/MONITORTA/NEWSPTY DISPLAY AUXMULTI CONTROLMD/TAPE1REMOTE CONTROL UNITRC-R0708PHONO6 72TUNINGDISC SKIP%VOL. DOWNVOL. UPMEMORY S.DIRECTSOUND

6、 BALANCE1 P.CALL4BAND AUTO A/B +100POWERMUTEDIMMERBASS BOOSTTUNER CD1 2 34 5 60789 + 1 0TAPE2/MONITORTA/NEWSPTY DISPLAY AUXMULTI CONTROLMD/TAPE1REMOTE CONTROL UNITRC-R0709PHONO6 72TUNINGDISC SKIP%VOL. DOWNVOL. UPMEMORY S.DIRECTSOUND BALANCE1 P.CALL4BAND AUTO A/B +100POWERMUTEFM (T90-0836-05)indoor a

7、ntenna 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 a

8、dapt 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 som

9、e 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 wil

10、l 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 / CAUT

11、IONSCONTENTS/ACCESSORIES/CAUTIONS.2CIRCUIT DESCRIPTION.3ADJUSTMENT.6WIRING DIAGRAM.7PC BOARD.8SCHEMATIC DIAGRAM.11EXPLODED VIEW.21PARTS LIST.22SPECIFICATIONS.28ContentsAccessoriesCautionsAR-304/KRF-A40203CIRCUIT DESCRIPTION1. BACK UP DATAAND INITIAL STATE 1-1 BACK UP(1)AMP POWER.STANDBY INPUT SELECT

12、OR.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/

13、AM:531kHzQ1.FM:65.00MHz/AM:531kHz AUTO/MANUAL.AUTO DISPLAY MODE.FREQUENCY E ON THRUST RECEIVING.OFFMODE T1 VOLUME.OFF(-66dB)1-2INITIAL 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 SETTING

14、Turn 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 CONTENTS1The 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.2Al

15、l lighting mode is canceled when any main unitskeys are pressed. The normal display obtained whenthe selector is set to TUNER then appears.3E2PROM 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 w

16、ritingdata are the same. Display shows ”LW” if the differentdata will be written to E2PROM.3-4 ACTIVE CONTENTS1The mute control is not activated when the mode isswitched.2The test mode will be terminated by plugging it off thepower source or by initializing it when all the settingswill be initialize

17、d.3During 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).4Channel space will be no changed in the test mode.3-5 CONTENTS 3-5-1 TUNER

18、FUNCTIONWITH THE SELECTOR ON TUNER (E/T/Q TYPE ONLY)DESTINATIONTUNERTYPEBANDRECEIVINGFREQUENCYRANGECHANNELSPACEIFPLLREFERENCEFREQUENCYDSW3(D507)DSW2(D505)DSW1(D504)DSWO(D510)K,PK1(1700)FMAM87.5MHz108.0MHz530kHz1700kHz100kHz10kHz+10.7MHz+450kHz25kHz10kHz0000M.XE1FMAM87.5MHz108.0MHz531kHz1602kHz50kHz9

19、kHz+10.7MHz+450kHz25kHz9kHz0011MK2(1600)FMAM87.5MHz108.0MHz530kHz1610kHz100kHz10kHz+10.7MHz+450kHz25kHz10kHz0001E,TE3RDSFMAM87.5MHz108.0MHz531kHz1602kHz50kHz9kHz+10.7MHz+450kHz25kHz9kHz0101QQ1RDSFMLFMHAM65.0MHz74.0MHz87.5MHz108MHz531kHz1602kHz10kHz50kHz9kHz+10.7MHz+10.7MHz450kHz5kHz5kHz9kHz1011DSW0D

20、SW3(DIODE SW)*O:NONE DIODE,1:ADD DIODE2. DESTINATION LIST OF TUNEROPERATION KEYFUNCTIONFLDISPLAYREMARKS(EX.)PTYS LEVEL(1)(SLEVEL),(RF ATT)OFF(1)RFATT(2)(SLEVEL),(RF ATT)ON(2) (3)(3)(NORMAL),(RF)ATT OFFCYCLEDISPLAYP.CALL UPBASS BOOSTP.CALL DOWNP.CALL FREQUENCYTA/NEWSPI CODEPI0000PICODE ON/OFFBass and

21、 treble are selected when the sound key ispressed.2Tuned light3-5-2 AMP FUNCTIONWITH THE SELECTOR ON SOMETHING OTHER THANTUNER1One touch max,min setting for Audio level.SOUND KEYKEYMASTER VR.BASSTREBLEBAND-89dB-10dB-10dBAUTO0dB+10dB+10dBMEMORY-10dB0dB0dBXS8SL16XS8/SL16TUNED LIGHTSTUNED LIGHTSSWITCHO

22、FFONAR-304/KRF-A40204CIRCUIT DESCRIPTION4. Microprocessor CXP82840-163Q, CXP82832-162Q (X09, IC51)4-1 Microprocessor periphery block diagram diagramFL DISPLAY ED5110GRID16SEGMENTX8X3X2X2X2X2X09, S516SERIAL COMMUNICATIONDATA BUSYVOLUMEENCODERX09, S518MULTIENCODERX09, S517SELECTORENCODERX2X38.0MHzCERE

23、SETX3X2TUNER 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 ON

24、LYE/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/MONITORSOUNDAUTOKS

25、7(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)

26、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

27、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 po

28、wer 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-Co

29、m 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.C

30、EOPLL 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

31、-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

32、 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

33、.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)1DISCRIM

34、INATOR(A)98.0MHz 1kHz, 40kHz dev. Connect a DCvoltmeterbetween CN21and 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

35、)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 t

36、he 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 OUTPLAY INPLAY INPHONOLRGND AMSPEAKERS+-+R+-+LLRB ASUBWOOFERPRE

37、 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: 50kHz50uSAM: 10kHzFM: 100kHz75uS2121X

38、S8SL16SBUSYSDATA31 311131(K,P)(M)(Q)(X)(T,E): AC120V 60Hz: AC110-120V/220-240V50/60Hz: AC220V 50Hz: AC240V 50Hz: AC230V 50Hz21F2F1F3120V110-240V220-15 1511F4F51661152121114431CN1 CN7GNDCH SPACEDE-EMPHASISS1J1AM ANTFM75S1POWERSWWH1 CN2Rch 4+2Lch+3Rch+1Lch+J5FRONTSPEAKERS ASPEAKERS BFRONTS4SYSTEMCONTR

39、OLSWJ6SYSTEMCONTROLPRE OUTJ4SUB WOOFERLch 5Rch 6Lch 3Rch 4J3Lch 1Rch 2Lch 1Rch 2PHONOJ1MD/TAPEPLAY INTAPE2/MONITORREC OUTPLAY INLch 3Rch 6Lch 5Rch 4J2REC OUTRch 2Lch 1MD/TAPEAUXCDCN8 CN9WH51CN10CN1J8ACOUTLETUSED(M)TYPE(E,E2)TYPEUSEDT1S2S3WH4CN6WH2WH3DESTINATIONU.K.EUROPECOUNTRYTE2-71UNIT No.ABB.UNIT

40、 No.KRF-A4020 (X05-5052-71)COUNTRYRUSSIA QABB.3-81DESTINATIONKRF-A4020W (X05-4983-81)EUROPE E1 2-71ABB.COUNTRYDESTINATIONKRF-A4020E (X05-4982-71)COUNTRYUNIT No.ABB.GENERAL MARKETEUROPEU.K.AUSTRALIATE2-71MX0-210-71CANADA PKRF-A4020 (X05-498X-XX)DESTINATIONUNIT No.DESTINATIONAR-304 (X05-5050-10)COUNTR

41、YU.S.A.UNIT No.ABB.K0-10KRF-A4020W (X09-6143-81)DESTINATIONCOUNTRYRUSSIAABB.Q 3-81UNIT No.KRF-A4020 (X09-614X-XX)GENERAL MARKETDESTINATIONKRF-A4020E (X09-6142-70)DESTINATIONEUROPECOUNTRYEUROPEAUSTRALIAU.K.COUNTRY2-70EUNIT No.ABB.E1 2-70MTX0-210-510-71UNIT No.ABB.AR-304 (X09-6310-10)DESTINATIONCOUNTR

42、YU.S.A.CANADAABB.KP0-10UNIT No.KRF-4020W (X09-6143-81)DESTINATIONCOUNTRYRUSSIA 3-81UNIT No.QABB.COUNTRYDESTINATIONKRF-4020E (X09-6142-70)EUROPEU.K.EUROPEAUSTRALIAGENERAL MARKETKRF-4020 (X09-614X-XX)DESTINATIONCOUNTRYCANADADESTINATIONCOUNTRYU.S.A.X 0-71UNIT No.2-70E1ABB.2-700-51ET0-21UNIT No.MABB.UNI

43、T No.0-10KPABB.AR-304 (X09-6310-10)WH52TAPE2/MONITORE2 E3HEADPHONEABB.COUNTRY2-710-51EUROPEU.K.ETKRF-A4020 (X09-631X-XX)UNIT No.DESTINATIONJ7UNIT No.KRF-4020 (X09-631X-XX)EUROPEU.K. TEDESTINATIONCOUNTRY ABB.0-512-71TUNER UNIT(X05-XXXX-XX)USED (M)TYPE(X09- ) (F/8)USED EXCEPT (K,P)TYPE(X09-6XXX-XX) (A

44、/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-3048ABDCE2 1357 46Refer to the schematic diagram for the value of resistors and capacitors.PC BOARD(Component side view)R70R40C53OFFONW5W6W

45、7 W4W19W22W21W20W14W17W10W1W3(W)(G)AM RFVTPLLFM IFAM STEREOFM DET MPXVrefTUNED FMMPX.FIL.T.METERC17W24C28 C38C29 C37W9W16VR1CF1CF2C10W13W23CF3L9L2R50R44R71C49C46C72C32C14 C15C67C55W25L3C62C66C65W8W11W15L1C73C7R81C27C16C19C21C23L6 L7C48R41L4R77R61C59R2X2X11 1122 121151181630215 1E1CN1D6A1IC1D4D3D9D5I

46、C2CN2J1S1CH. SPACEDE-EMPHASISANTENNAX05-498X-XX/X05-505X-XXC69D16R90W86R80R82R12C77R60R59R58W52C86EBE BD7D13Q14Q15C88R89C87R43C6C78C75C11C39C42C52C47C50C51C43C44R55 R56R53R54R57R51R52R49R42R11R1R7C76R83R88D1C84C35R32/W60C8C36W85C5C1C2C3C82C12C25C26C24C41C40C30C22C18C20R14R15R16R10R4R5R8R9R6R35R23R28R25R27C31C79W51W80R85C85R86 R87EBE BQ2Q1D11C92C93C91C89C83R29R48R34R33R84R79R47W84R45R46R31R36W62R64R65R30C8