Kenwood-KRFV-8020-D-Service-Manual电路原理图.pdf

AUDIO VIDEO SURROUND RECEIVERKRF-V7020D/V8020DVR-307/309/357SERVICE MANUAL©1999-1/B51-5499-00 (K/K) 1895Illustration is KRF-V7020D(Y).- Font glass (B10-3458-02)Knob (K27-2293-04)Knob (K29-7370-02)Knob (K29-7370-02)Phone jack (E11-0127-05)Foot (J02-1407-03)KENWOOD badge (B43-0302-04)Knob (K29-7326-04)Knob (K29-7323-03)Knob(K29-7325-04)AC power cord (E30-2605-05)Phono jack (6Px2)(E63-0047-15)Phono jack (E63-0164-05)Miniature phone jack(E11-0293-05)Phono jack (E63-0094-05)Phono jack (E63-0093-05)Phono jack (E63-1080-05)Phono jack (4Px2)(E63-0046-15)Power cord bushing(J42-0083-05)AC outlet (E03-0148-05)Optical receiving module(W02-1181-05)Lock terminal board (E70-0052-05)Screw terminal board (E70-0100-05)Lock terminal board (E70-0047-05)Metallic cabinet (A01-3685-01)Slide switch(S62-0034-04)Slide switch(S62-0001-04)Remote ControllerModelDestinationsParts numberModel nameBattery CoverKRF-V7020DX7,C7,Y7,V7,M7A70-1268-05RC-R0712A09-1123-08KRF-V8020DX8A70-1275-05RC-R0508A09-0366-08KRF-V8020DC8,I8,Y8,M8A70-1277-05RC-R0608A09-0366-08VR-307K6,P6A70-1268-05RC-R0712A09-1123-08VR-309K8,P8A70-1277-05RC-R0608A09-0366-08VR-357K7,P7A70-1277-05RC-R0608A09-0366-08Resetting 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 countriesFM (T90-0836-05)RC-R0508/R0608RC-R0712Battery cover (A09-0366-08)Battery cover (A09-1123-08)(E03-0115-05)indoor antenna (1)(T90-0833-05)Loop antenna stand (1)Batteries (R03/AAA) (4)*AC plug adaptor (1)*Use to adapt the plug on the powercord to the shape of the wall outlet.(Accessory only for regions where useis necessary.)AM loop antenna (1)Remote control unit (1)Remote control unit (1)KRF-V7020D/V8020D/VR-307/309/3572CONTENTS / ACCESSORIES / CAUTIONSCONTENTS / ACCESSORIES / CAUTIONS.2DISASSEMBLY FOR REPAIR.3CONTROLS.4BLOCK DIAGRAM.6CIRCUIT DESCRIPTION.7ADJUSTMENT.14WIRING DIAGRAM.15PC BOARD.16SCHEMATIC DIAGRAM.21EXPLODED VIEW.35PARTS LIST.36SPECIFICATIONS.45ContentsAccessoriesCautions Model name vs remote controllerKRF-V7020D/V8020D/VR-307/309/3573DISASSEMBLY FOR REPAIR1. Remove the 8 screws (1,2,3),remove the rear panel.2. Connect the GND of the rear paneland the chassis, the GND of themounting hardware and the chassiswith 2 alligators clip (4)1224443x2x2x2x2KRF-V7020D/V8020D/VR-307/309/3574CONTROLS8 FUNCTION SHIFT keyUse in combination with the numeric keys toexecute alternate commands.9 Numeric keysProvide functions identical to those of theoriginal remote control supplied with thecomponent you are controlling.To access the functions printed above thekeys, press within 3 seconds of pressing theFUNCTION SHIFT key. Function availabilityvaries for each component.0 SHIFT keyUse in combination with the AUDIO andVIDEO keys to change the remote controlmode without changing the input selector orin combination with the POWER key to turnon and off components programmed intothe remote control.! TV selector keySets the remote control to operate a TV orcable box. This key does not change theinput selector on the receiver. AUDIO selector keySelects the audio inputs and sets the re-mote control to operate the respectiveKENWOOD audio component.If you connect audio components fromKENWOOD and other makers to the MD/TAPE or CD jacks, you can set the remotecontrol to operate these components byregistering the appropriate setup code atthe respective input.# GUIDE keyUse to activate the OSD menu functions ofregistered components.$ VOLUME keyUse to adjust the receiver volume.% MUTE keyUse to temporarily mute the sound. SOUND keyUse to adjust the sound quality and ambi-ence effects.& LISTEN MODE keyUse to select the listening mode.* SETUP keyUse to select the surround sound settings.1 POWER keyUse to turn the receiver on and off.Use in combination with the input selector(AUDIO, VIDEO, or TV) keys and SHIFT keyto turn various components on and off.2 MACRO keyUse in combination with the AUDIO, VIDEO,or TV keys to execute a series of commandsautomatically (MACRO PLAY).3 VIDEO selector keySelects the video inputs and sets the remotecontrol to operate the component regis-tered at the respective input.4 Multi control keysUse to operate the selected component.5 REC keyUse to operate the selected component.6 TUNING/SKIP keyUse during the setup procedure to specifyvarious settings. Use to operate the tuner orselected component.7 SUBWOOFER keyUse in combination with the VOLUME +/keys to adjust the volume of the subwoofer.There are some cases in which keys (orknobs) that have the same function onthe receiver and on the remote controlhave different names. In the instruc-tions of this manual, if the names ofcorresponding keys (or knobs) on thereceiver and remote control are differ-ent, the name of the remote control keyis indicated in parentheses.AUDIOSHIFTMACROTVVIDEOGUIDERECMUTEVOLUMETUNING/SKIPTHEME FAVMENUFUNCTIONSHIFTSETUPINFO ALT AUDTV/SAT/VIDREPEAT RANDOM+100DISPLAYENT+10LISTENMODE SOUNDSUBWOOFER23156489701237894560!#*&%$874¢6BANDP. CALL P. CALLPOWERRemote control unit (RC-R0608 / R0508)ASPEAKERSB BASS BOOST MONITORSOURCEDIRECT INPUT MODELISTEN MODE SOUND SETUPMULTI CONTROL INPUT SELECTORVOLUME CONTROLDTSDOLBY DIGITALVIRTUAL SURROUNDDOLBY DIGITALVIRTUAL SURROUNDDOWN UPSTANDBYAV SURROUND RECEIVERON / STANDBYPHONES- ON OFFPOWERPOWERSTANDBYON / STANDBYDIMMER P.CALL P.CALL BAND AUTO MEMORYFM AMkHzMHz 3 STEREOBS.DIRECTASPMUTEDOWNMIXMONITORPRO LOGICTUNEDMEMO.AUTOST.AUTO SOUNDSSWCRSRLSLLFEDIGITALCLIP2 83 4 6 75 9)(%$#!0 &*1DisplaySpeaker selection indicatorsInput channel indicatorsOutput channel indicatorsAUTO SOUND indicatorBand indicatorsAUTO indicatorMEMO. indicatorST. indicatorTUNED indicator3 STEREO indicatorSTEREO indicator1 POWER key(For U.S.A. and Canada)Use to turn the power ON/OFF.STANDBY indicator1 ON/STANDBY ( ) key(Except for U.S.A. and Canada)Use to switch the power ON/STANDBYwhen the POWER is turned ON.STANDBY indicator2 POWER key(Except for U.S.A. and Canada)Use to turn the main power ON/OFF.3 Surround indicatorsDTS indicatorLights when the receiver is in the DTSmode.(For VR-309, KRF-V8020D)DOLBY DIGITAL indicatorLights when the receiver is in the DolbyDigital mode.VIRTUAL SURROUND indicatorLights when the receiver is in the VirtualSurround mode.4 DIMMER keyUse to adjust the brightness of the display.Use to select the REC MODE.5 P.CALL keysUse to call up previously registered radiostations.6 BAND keyUse to select the broadcast band.7 AUTO keyUse to select the auto tuning mode.8 MEMORY keyUse to store radio stations in the presetmemory.9 VOLUME CONTROL knob0 PHONES jackUse for headphone listening.! SPEAKERS A/B keysUse to turn the speakers ON/OFF. BASS BOOST keyUse to select the maximum adjustmentsetting for the low frequency range.About the STANDBY indicatorThis unit has a STANDBY indicator. When the STANDBY indicator is lit, the unit consumes a small amount of power to preserve the memory. This is calledSTANDBY mode. This mode also lets you turn the power ON using the remote control.Frequency display,Input display,Preset channel display,Surround mode displaySpeaker indicatorCLIP indicatorPRO LOGICindicatorDIGITAL indicatorS.DIRECT indicatorMONITOR indicatorDOWNMIX indicator# MONITOR key$ SOURCE DIRECT key% INPUT MODE keyUse to switch between the digital and analoginputs. LISTEN MODE keyUse to select the listening mode.& SOUND keyUse to adjust the sound quality and ambence effects.* SETUP keyUse to select the surround sound settings( MULTI CONTROL knobUsed to make a variety of settings.) INPUT SELECTOR knobUse to select the input sources.For U.S.A.and CanadaMUTE indicatorFor VR-307, VR-357KRF-V7020DKRF-V7020D/V8020D/VR-307/309/3575CONTROLSRemote control unit (RC-R0712)AUTO (7)keyIf tuner is selected as the input source, thiskey functions as the AUTO key.If CD or MD is selected as the input source,this key functions as the stop key.TUNING (1 CR) keysIf tuner is selected as the input source, thesekeys function as tuning keys.If CD or MD is selected as the input source,these keys function as search keys.P.CALL (4 ¢CR) keysIf tuner is selected as the input source, thesekeys function as P.CALL keys.If CD or MD is selected as the input source,these keys function as skip keys.3 LISTEN MODE keyUse to select the listening mode.4 MUTE keyUse to temporarily mute the sound.5 SOUND keyUse to adjust the sound quality and ambi-ence effects.6 MULTI CONTROL keyUsed to make a variety of settings.1 Numeric keysIf CD or MD is selected as the input source,these keys function as numeric keys. If tuneris selected as the input source, these keysare used to call up station presets.2 Component operation keysUse these keys to operate other compo-nents with system control connections tothe receiver.2 keyIf tape is selected as the input source, thiskey functions as the play key for side B of thecassette (the side facing away from the frontof the deck).BAND (6) keyIf tuner is selected as the input source, thiskey functions as the band selector key.If CD is selected as the input source, this keyfunctions as the play/pause key.If MD is selected as the input source, this keyfunctions as the play key.DISC SKIP, A/B, +100 keyIf CD is selected as the input source, this keyfunctions as the multi-CD player disc skip key.If TAPE is selected as the input source, this(A and B) of a double cassette deck.REMOTE CONTROL UNITRC-R0712POWER1230456+107LISTENMODE S.DIRECTDISC SKIPA/B +100AUTOBANDTITLESUB TITLEMD/TAPE TUNER CD PHONODVD CONT VIDEO 1 VIDEO 2 VIDEO 3OSDSET UPMONITORSOUNDMENUENTERMUTEMULTI CONTROLVOL.UP 2671 TUNING CRCR4 P.CALL ¢CRCR89VOL.DOWN 1234567#90!87 DVD CONT keyUsed to operate DVD player.While holding this key depressed, press any ofthe keys masked in gray inthe above illustrationto operate the corresponding function of aDVD player from KENWOOD.Keys 3, 4, 5, 9 and ! are given thefollowing functions during the DVD playercontrol operation.3 :TITLE4 :ENTER5 :SUB TITLE9 :MENU! :OSDFor details, refer to the instruction manual ofyour DVD player.8 POWER keyUse to switch the power ON/STANDBY whenthe POWER is turned ON.9 SOURCE DIRECT key0 VOLUME CONTROL key! SETUP keyUse to select the surround sound settings. MONITOR key# Input selector keysUse to select the receiver's input source.KRF-V7020D/V8020D/VR-307/309/3576BLOCK DIAGRAMLINE BUFPHONO EQX05IC16NJM2279MCS4226LPFLPF LPF LPFx2x2 x2 x1M62446SP6ch E. VOLwith 2chTONE CONT.x0.5BUFSTK411-230STK410-030+20/0dB+B HITAP-B HITAP+B LOWTAP-B LOWTAPCDCOXIALOPTICALVIDEO2INDIGITALVIDEO3VIDEO2VIDEO1CDPHONOTAPE/MDMONIPLAYMONI/MDTAPEVIDEO1VIDEO3VIDEO2VIDEO1VIDEO1MONITORS-VIDEO INRECOUTLchH, P, RchH, P, LchRchCchLchRchLSchRSchSWch PRE OUTSP-BSP-AAC IN+5VA.V.Rforu-COM+15VA.V.RA.V.R-15V+5V+7V-7VA.V.R5Vfor E. VOLforu-COMfor FIL AC(AUDIO and VISUAL)TUNER etc.for AMP (HI TAP)for AMP (LOW TAP)for RELAY SWTC9163TC9164A1J1IC6(1/3)IC7(3/3)IC7(1/3)IC7(2/3)IC6IC8IC6(2/3)VIDEO (Y)SEL(NOT for K,P TYPE)Q1SWITCHED S1D1,4D2D5IC1IC2-30VIC13Q2IC1IC2IC8(2/2)IC8(1/2)IC9IC7IC5IC11Q3Q4Q7Q5Q6Q8Q9Q10Q13Q11Q12IC4IC32.0V/2.2KSWchPRE OUTPUTCXP82852-139Qu-COMINPUT SEL.TUNERTC9162D1-4(1/2)(2/2)(1/2)(1/2)(2/2)(2/2)IC10IC10IC12IC11IC11IC12SP. OUTPUT5CH. SP. 28.3V/8COXIALVIDEO3SUBS5S2DIGS4L,RMIXIC10S3LS,RSS7NOSUBANAS1REC OUT BUFIC9S1S2S3S4S4S5S6S7S8S1S2S3IC6(3/3)ANALOG RECS7DIGITAL RECS8Q43Q44D3A.V.Rforfor DSPA.V.R3.3VIC146dB ATT MUTESYNCAC3 DECODERSUB DSPBAABYSS902YSS902 SDIBSEL=0SDIBSEL=1(VISUAL IN/OUT)S5S6DSPIC1LchRchCchLSchRSchSWchNJM2279MIC17VIDEO (C)SELAD/DA etc.for DSP-5VA.V.RIC19A.V.RIC185VIC12for DIR.A.V.R5VNJM2279MVIDEO SELIC4MONITORVIDEO 1VIDEO 1VIDEO 2VIDEO 3VIDEO OUTVIDEO IN200mV/2.2K200mV/47KOUTIN2.5mV/27K(AUDIO IN/OUT)PHONOOTHERKRF-V8020D,VR-209USEDK1S-VIDEO OUT1Vp-p/750.286Vp-p/75CYS-VIDEO IN/OUT(VISUAL IN/OUT)1Vp-p/75VIDEO IN/OUTIC51LFEDAAD22BYPASSSWCLS,RSL, RL, RLRCLSRSSWDIRC LS/RS L/R+4700uF4700uF3300uF470uF2200uF3300uF2200uF+2LRLS,RSC,LFEL,R C,SUB C,SUB L,R LS,RSCYYCYCYCYCKRF-V7020D/V8020D(X00)(X08)(X09)(X08)VR-307/309/357KRF-V7020D/V8020D/VR-307/309/3577CIRCUIT DESCRIPTION(0 : Pull down, 1 : Pull up)TYPEBANDReception frequencyChannelIFPLL standardDiode swspacefrequencyDSW3DSW2DSW1DSW0K1FM87.5MHz108.0MHz100kHz+10.7MHz25kHz00001700AM530kHz1700kHz10kHz+450kHz10kHzK2FM87.5MHz108.0MHz100kHz+10.7MHz25kHz00011610AM530kHz1610kHz10kHz+450kHz10kHzK4FM87.5MHz108.0MHz100kHz+10.7MHz25kHz10101700 RBDSAM530kHz1700kHz10kHz+450kHz10kHzE1FM87.5MHz108.0MHz50kHz+10.7MHz25kHz0011AM531kHz1602kHz9kHz+450kHz9kHzE3FM87.5MHz108.0MHz50kHz+10.7MHz25kHzRDSAM531kHz1602kHz9kHz+450kHz9kHz0101FML65.0MHz74.0MHz10kHz+10.7MHz5kHzQ1FMH87.5MHz108.0MHz50kHz+10.7MHz5kHz1011RDSAM531kHz1602kHz9kHz+450kHz9kHzMK2/E1 is switched with only the setting of DSW1 (X11 : S601).00X1(DSW1 = 0 : K2 type, 1 : E1 type)777675741. The back up item and initializationcondition1-1 Back up POWER: POWER OFF VOLUME LEVEL: -66dB AUDIO INPUT SELECTOR: TUNER VIDEO INPUT SELECTOR: VIDEO 1 SPEAKER A:ON SPEAKER B:OFF BASS: 0dB TREBLE: 0dB INPUT LEVEL: 0dB SOURCE DIRECT: OFF MONITOR: OFF DIMMER : DIMMER 1 (LIGHTEST) LISTEN MODE: STEREO VIRTUAL SURROUND: OFF INPUT MODE: DIGITAL AUTO SUB WOOFER: YES(ON) FRONT SP. SIZE: NORMAL CENTER SP. SIZE: NORMAL SURROUND SP. SIZE: NORMAL DISTANCE : Fch 10ft/3m: Cch 10ft/3m: Sch 10ft/3m FRONT (L,R) LEVEL: 0dB CENTER LEVEL: 0dB REAR (LS,RS) LEVEL: 0dB SUB WOOER LEVEL: 0dB MIDNIGHT: OFF BAND: FM FM FREQUENCY: 87.50MHz AM FREQUENCY: 531kHz(CH.SPACE 9kHz): 530kHz(CH.SPACE 10kHz) PRESET CH.: -ch PRESET MEMORY FREQUENCY : PRESET MEMORYFREQUENCY TUNING MODE: AUTO1-2 The initial settingWhile pressing POWER key, plug the AC power cord intoan AC outlet (K,P type) or turn on the AC POWERswitch.2. Condition by the destination or model3. TEST MODEsetting methodWhile pressing INPUT SELECTOR key, plug the ACpower co