Kenwood-KRFV-8881-D-Service-Manual(1)电路原理图.pdf

SYSTEMCONTROLFRONT SPEAKERS(6-16 )CENTER SPEAKER(6-16 )SURROUND SPEAKERSDIGITAL INCD1COAXIALVIDEO 4COAXIALVIDEO 3OPTICALVIDEO 2OPTICALSL 16XS 8(SL 16 )(XS 8 )(6-16 )OPTICALDIGITAL OUTSWITCHEDLRALRLCRBSL 16TEXTIRRECEIVERINRELAYCONTROLIROUTLCDREMOTEIR REPEATER OUTTVON/OFFSENSORLRRRLRANTENNAAM-FM 75GNDCD1PHONOMD/ TAPE 1 RECOUTPLAYIN RECOUTPLAYINPLAY INPLAY INCD2 /TAPE 2MONITORMONITOR OUTSURROUNDCENTERSUBWOOFERLLRVIDEOS VIDEOVIDEOSECOND ROOM PRE OUTPRE OUTAUDIOVIDEO 3 VIDEO 4PLAY INVIDEO 2VIDEO 1LRAUDIOPLAY IN RECOUT+-AUDIOPHONESINPUT SELECTORVOLUMEDTSDOLBY DIGITALCLIP INDICATORPOWERON/STANDBYABSPEAKERSMUTEDOWNUPDISPLAY MODES VIDEOVL - AUDIO - RCD2 / TAPE2MONITORON OFFAV AUXAUDIO VIDEO SURROUND RECEIVERKRF-V7771D/VR-2080KRF-V8881D/VR-2090SERVICE MANUAL©1998-5/B51-5426-00 (K/K) 1796Indicator(B12-0326-04)Indicator(B12-0333-04)Indicator(B12-0303-24)Panel*(A60-)Knob*(K29-)Knob*(K29-)Knob*(K29-)Front glass(B10-2418-03)Video cylindrical receptacle*(E56-)Phone jack(E11-0271-05)Phono jack(E63-1030-05)Knob*(K27-)Knob*(K29 -)Lockterminal board(E70-0052-05)AC power cord*(E30-)Miniature phone jack(E11-0373-05)x2Oscillating module(W02-1114-05)AC outlet*(E03-)Screwterminal board(E70-0096-05)Phono jack(E63-0133-15)Phono jack(E63-1028-05)Front glass(B10-2451-03)* Refer to parts list on page 60.Phono jack(E63-1008-05)Phono jack(E63-1005-05)Slide switch(S62-0034-05)Phono jack(E63-0139-15)x2Phono jack(E63-0200-05)Phono jack(E63-0136-15)x2Power cord bushing(J42-0083-05)Screw terminal board(E70-0095-05)Optical receiving module(W02-1181-05)x2Video cylindrical receptacle(E56-0011-05)x2Miniature phone jack(E11-0360-05)Phono jack(E63-0162-05)x2Miniature phone jack(E11-0291-05)Miniature phone jack(E11-0374-05)x2KRF-V7771D(K) COVER( 98.12.8 18:58 yW2FM (T90-0835-05) indoor antenna (1)Remote (A70-1191-05)(RC-R0907)Battery cover(A09-0378-08)control unit (1)Loop antenna stand (1)Batteries(R6/AA) (4)AM loop antenna (1) (T90-0833-05)(J19-3645-05)Check that the following accessories are present.* AC (E03-0115-05)plug adaptor (1)*Use to adapt the plug on the power cordto the shape of the wall outlet. (Accessoryonly for regions where use is necessary.)KRF-V7771D/V8881D/VR-2080/20902CONTENTS / ACCESSORIES / CAUTIONSCONTENTS / ACCESSORIES / CAUTIONS.2CONTROLS.3DISASSEMBLY FOR REPAIR.5BLOCK DIAGRAM.6CIRCUIT DESCRIPTION.9ADJUSTMENT.17WIRING DIAGRAM.19PC BOARD.23SCHEMATIC DIAGRAM.31EXPLODED VIEW.59PARTS LIST.60SPECIFICATIONS.79ContentsAccessoriesCautionsHow to reset the microcomputerThe microcomputer may malfunction (impossibility of operation,erroneous display, etc.) when the power cord is unplugged andplugged in again while the unit is in ON mode with the keypressed or due to other external causes. In this case, execute theprocedure on the right to reset the microcomputer and return theunit to the normal condition.1Unplug the power cord from the wall outlet.2While holding the (ON/STANDBY) key depressed, plug thepower cord into the wall outlet again.CRResetting the microcomputer clears the memory you entered andreturns it to the initial condition when the unit left the factory.U.S.A. and Canada1With the power cord plugged in, turn the POWER key OFF.2Whill holding down the ON/STANDBY key, press POWER key.Expect for U.S.A. and CanadaPlease note that the following items will be deleted fromthis units memory if the power cord is disconnectedfrom the AC outlet for approximately three days.Memory backup functionCRThe frequency setting is cleared and 87.5 MHz is selected.CRThe preset station memory is cleared.CRThe surround setting is cleared and reset to the initial condition.CRThe input selection is cleared and the “Tuner”input is selected.CRThe volume setting is cleared and the volume is set to “-66 dB”.CRThe receiving band setting is cleared and the “FM”band isselected.KRF-V7771D(K) COVER( 98.12.8 18:58 yW3PHONESINPUT SELECTORVOLUMEDTSDOLBY DIGITALCLIP INDICATORPOWERON/STANDBYABSPEAKERSMUTEDOWNUPDISPLAY MODES VIDEOVL- AUDIO - RCD2 / TAPE2MONITOR348657#$%*&09!ON/STANDBYPOWERON OFF21AV AUXST.TUNEDMUTESTANDBY indication 1POWER key(U.S.A., U.S.Military and Canada)Press to switch power ON and OFF.2POWER key(Except for U.S.A., U.S.Military and Canada)(China : POWER)Press to switch the main power ON and OFF.3ON/STANDBY key(Except for U.S.A., U.S.Military and Canada)Press to switch the power mode betweenSTANDBY and ON.4STANDBY indicatorLights in STANDBY mode.5RC sensorReceives signals transmitted from the re-mote control unit.6PHONES jackUse for listening audio through headphones.7SPEAKERS keysPress each key to switch the SPEAKERS A orSPEAKERS B ON and OFF.Stereo indicatorMUTE indicatorTUNED indicatorMulti-mode displayWhile standby indicator is indicated, a small amount of power is supplied to the system to back up the memory. In this mode, the system can beturned ON by remote control.Display8IndicatorsCLIP INDICATOR :Lights when the input is clipped duringanalog to digital signal conversion.DOLBY DIGITAL :Lights when Dolby Digital is activated.DTS :Lights when the DTS is activated.9MUTE keyPress to mute the audio temporarily.0RC transmitterSends signals to the remote control unit.!IndicatorLights when signal is input from or output tothe remote control unit.VOLUME control knobRotate to adjust the volume.#S VIDEO input jack(Except for the VR-2080 or the KRF-V7771Dfor the U.S. Military destination)Connect the S VIDEO output jack of an AVcomponent.$VIDEO input jackConnect the composite video output (RCA)jack of an AV component.%AUDIO (L, R) input jacksConnect the audio output (RCA) jacks of an AVcomponent.CD2/TAPE2 MONITOR indicatorLights when the CD2/Tape2 (Monitor) input isused.&DISPLAY MODE keyPress to switch the display on the main unit.*INPUT SELECTOR keyPress to switch the input as shown below.TUNERCD1MD/Tape1VIDEO1VIDEO2VIDEO3VIDEO4AV AUXPHONOKRF-V7771D/V8881D/VR-2080/20903CONTROLSKRF-V7771D(K) COVER( 98.12.8 18:58 yW6ON/STANDBYMUTEVOLUMEENTERSetupSurroundSP LevelSurr.SP TypeSP DistanceSP SelectionTunerCD1Video2Video3Video4Video1TV1PhonoTV2CD2MD/Tape1CD2/Tape2InputDigitalInputAnalogAV AUXMacroRemoteModeMainMenuCONFIRMNoteNoteModelType SetupModel3Model2Model123CR¥CR»CR£CR CR)CR(CR¢CR16547890!#$%&*CRCR“CRRC : Infrared systemPerform “Model Type Setup”of the RC before using it.The following menu display ap-pears after the batteries areloaded for the first time.Controls and indicatorsThe Remote Control unit provided with the Receiver can also control KENWOOD MD recorder, cassette decks, CD player, DVDplayer and LD player which are connected to it through system control cords. For details of the controllable functions, refer tothe instruction manuals of these components.The displayed icons are variable depending of the“Model Type Setup”formatching specifications with the Reciever which uses the RC unit and “Setup” formatching specifications with connected source component.1Segment screenThe fixed icons are displayed inthis area.2TV1 iconSelect to display the TV1 controlscreen.3Main Menu iconSelect to display the Main Menuscreen.4TV2 iconSelect to display the TV2 controlscreen.5Phono iconSelect to select the PHONO in-put.6Video1 iconSelect to control Video1.7CD1 iconSelect to control CD1.8Video2 iconSelect to control Video2.9CD2 iconSelect to control CD2.(Room B only)0Video3 iconSelect to control Video3.!Tuner iconSelect to control Tuner.Video4iconSelect to control Video4.#MD/Tape1 iconSelect to control MD or Tape1.$CD2/Tape2 iconSelect to monitor the CD2/Tape2input. (Room A only)%AV AUX iconSelect to select the AV AUX in-put.Input Digital iconSelect to play a digital input or toswitch between Auto and Manual.&Macro iconSelect to control Macro.*Input Analog iconSelect to play an analog input.(Remote Mode iconSelect to switch the remote con-trol operation mode withoutchanging the selected input.Segment screenOperation keysMenu screen)Menu screenControl key icons and con-trol levels are displayed inthis area.CRStatus displayThe example in the illus-tration shows the “SetupSurround”status.“CRSP Selection iconSelect to set up the speak-ers.£CRReturn iconSelect to return to the pre-vious menu screen.¢CRStatus displayShows the communicationstatus.CRJoy stick keyThis key is used to select anicon. This key can be controlledin 4 directions.CRENTER keyPress to enter the selection ofan icon.CRVOLUME (up) control keyPress to increase the volume.¥CRVOLUME (down) controlkeyPress to decrease the volume.»CRCONFIRM keyPress to select the currentlydisplayed items.CRMUTE keyPress to mute the audiotemporarily.CR(ON/STANDBY) keyPress to turn this unit and thecomponents connected to itthrough system cords betweenON and STANDBY modes.KRF-V7771D/V8881D/VR-2080/20904CONTROLSKRF-V7771D(K) COVER( 98.12.8 18:58 yW7663449933211121435x29x58x23x271313131414151012221x32x322x2x52x22333313x29Remove the bottom plate.Make use of the changing final transistor etc.1. Remove the 19 screws (1, 2) and PCB support, thenremove the bottom plate.Check the vertical PCB1. (Exist bottom plate) Remove the hook of rearpanel(1).2. Remove the 29(Exist bottom plate: 34)screws(2), then remove the rear panel.3. Connect the GND of the phono terminal, theGND of antenna shield board,the GND ofcoax., the GND of system control shieldboard, the GND of SP terminal shield boardand the chassis with 5 wires connected alli-gator chips(3).Remove the escutcheon (operationpanel)1. Remove the knob(1), the nut (2), the 11screws(3, 4, 5) and 2 hooks (6), thenremove the front panel ass'y.2. Remove the lead wire(7), the 2 screws(8:except K,P type) and 7 screws(9) thenremove the PCB.3. Remove the under front glass(0, -), thenremove the front panel(=) from the subpanel.4. Remove the 2 under escutcheon sides() byÆscrew driver and the 2 hooks(!) thenremove the escutcheon().Fig. 3Fig. 1Fig. 2KRF-V7771D/V8881D/VR-2080/20905DISASSEMBLY FOR REPAIRKRF-V7771D(K) COVER( 98.12.8 18:58 yW10(X08) (X11)(X11) (X25)IC89 IC60VR-2090DIGITALVR-2090DIGITAL REC SEL.IC71OUTDIGITALOPTICALD-SEL2 D-SEL1MAX:1.0VrmsTC9163AF-2 TC9164AF-2OTHEROUTIN200mV/2.2K 200mV/47KDIRECTFL,FRLS,RS, CENTERSUBIC78(2/2) IC80 IC78(1/2) IC7680Hz LPF 21kHz LPF 21kHz LPF 21kHz LPFIC56IC55IC56IC59 IC86 IC87IC52IC62AD/DACS4226DRAMDRAMSRAMROMAC-3DSPF56009FJ88DTSDSPI56009FJ88CONFIGRATIONDSPB56007FJ88BUFFERBUFFERIC74IC5BUFFER ROOM BLINEIC21(2/2)INPUT ATTL1,R1L2,R2(DIGITAL)(ANALOG)EQIC1IC23IC1(1/2), IC2(1/2)IC4IC1(2/2), IC2(2/2)IC72(TAPE2 MONITOR)PHONO2.5mV/4.7KTUNERIC21(1/2) BUFFER LINE ROOM AL4,R4PHONO INR5L3,R3L5,R5L7,R7REC OUTBUFFERIC3L3 R3 R1 R4 R2L8,R6 R3,R5 R2,R4 R1,R7L2TAPE1/MD INL4TAPE/CD2 INL1L1,R8L2,L4L3,L5L6,L7L5L7R8R7L8BUFFER BUFFER BUFFER BUFFERVIDEO2 OPTICAL VIDEO3 OPTICALCD COAXIALVIDEO4 COAXIALTAPE2 RECVIDEO2 REC VIDEO1 RECTAPE1/MD RECVIDEO4 INAV AUX IN VIDEO3 IN VIDEO2 IN VIDEO1 INCD1 INKRF-V7771D/V8881D/VR-2080/20906BLOCK DIAGRAM(SIGNAL STAGE)KRF-V7771D(K) COVER( 98.12.8 18:58 yW1178BLOCK DIAGRAMKRF-V7771D/V8881D/VR-2080/2090KRF-V7771D/V8881D/VR-2080/2090(X07)(X25)(X08)(X25) (X07)(X25)(X25)VR-2080RESETSDTMCKMREQMDTSREQMISO/SDA767.STB.RESETDATA INCLK DATA OUT65517SS SCK/SCLMISO/SDAHREQGPI00RESETMOSHREQMISO/SDAHREQGPI00GPI02MOSSS RESET SCK/SCL.AUDIO .PDN .FREQO.AC-3 .ERR.FREQ1CDIN CS CCLK CDOUTCLKDATADATACLKSTB+To FANSRAMDRAMTUNERToDSPToANALOGPOWER To u-COM ToPOWER-RLY+ +SE-RLY+ +Y YCC YV-MUTEYC YCC Y YCC YV-MUTECS1(X08)(u-COM STAGE)IC53VR-209027.9V/6 26.8V/624.5V/6VR-2080 KRF-V8881D KRF-V7771D5ch SP. OUTPUTVR-2090VR-2090VR-2090AMPLIFIER AMPLIFIERFAN FRST/SLOWFAN ON/OFFDTSAC-3CONFIGSBUSYSDATARXTXVR-2090TC9163AF-1IC42SYSTEM CONTROL(X08) J17SYSTEM CONTROL(X08) J16 (X08) J15SL16 TEXTDATA-IN10DAC/ADCTUNER5(A,B,CS,TR,POWER)29TUNER3 438RELAY FANVIDEO SEL.DIGITAL INPUT SEL.WIDE V-MUTEVIDEO SYNCTONE CONT.PROTECTION455kHz FILTERVR-2090 (K,P)(X11) J13 (1/2)IR RECEIVER IN REPEATER OUT(X11) J14VR-2090 (K,P)IC86(X08)6FANFAN DRIVER(X07) Q211-215PARALELSIRIAL/OUT LED(X11) D21-24IR LED REMOTE OUT(X11) J13 (2/2)(X08) Q64-66(X08) IC67REMOTEu-COMSENSORTV or LIGHTRELAY CONTROL(X11) J12RDS(X08) IC68(X08) IC69MAIN u-COMDATA-OUTSUB u-COMREMOTE SENSOR(X25) A1KEY MATRIXFL(X25) ED1FL DRIVER(X25) IC61LEDPEAK LEVELLED1.0/1KPRE OUTPRE OUTSPEAKERSFRONT AL,R PHONESCSL,SRFRONT BROOM B SPCSL,SRSWSECOUND ROOM PRE OUTB-MUTESW-MUTES-MUTEA-MUTERELAY BRELAY CSRELAY ARELAY SBUFFERIC31(2/2) BUFFERIC30 IC31(1/2) BUFFERK229dB POWER (X25)(X07) 29dB POWER (X25)(X07) AMPLIFIER 29dB POWER (X25)(X07)K1K1K4K3MUTEQ1-4MUTEQ36MUTEQ33,34 Q35MUTESW-MUTEB-MUTEA-MUTE-20dB ATTMUTEQ5,6MUTE MUTEMUTEMUTEQ3,4Q11Q7,8Q12BUFFERAMPIC22IC26IC24(2/2)IC26(1/2)ATT -20dB ATT -20dB ATT -20dB ATTQ1,2Q5,6-20dBQ9Q10IC28IC53(2/2) IC52IC53(1/2)IC51ROOM BIC27 IC25(2/2) IC23 IC25(1/2) IC21VOLUME VOLUME VOLUME VOLUME VOLUMEL7,R7L8,R8 L4,R4IC44IC43TONEL6,R6L1,R1L3,R3L2,R2(X11)LOW BOOSTIC47,48CONFIG-2IC49INVVIDEOSECOND(B)ROOMD82GND +30V63-65,73 IC57,61,AVRAVRIC82AVRIC83D86 D311EXCEPT K.PEXCEPT K.P(X07) T1K5D312AC OUTLETDRIVER RELAYQ301K6STROKE SWFIL FIL-35VAVRQ311D88AVRIC84GND+5.0VTo VIDEO 5 To VIDEO 5AVRQ85AVRQ86AVRQ83AVRQ84D81+17VGND-17VDRIVERRELAYQ154D252D251PRE DRIVEGNDPRE DRIVEGNDFINAL TR. FINAL TR.D301-304GND+5.6V(X07) IC31AVRQ13VIDEO 2Q14VIDEO 1Q12Q30Q16Q31Q15MONITOR OUT1Vp-p/75 (S1-VIDEO)PLAYRECAV AUX(FRONT) VIDEO 4 VIDEO 3 VIDEO 2 VIDEO 1(VISUAL)1Vp-p/75(OSD)(SECOND ROOM)IC52(1/2)Q17MONITOR OUT BQ55MONITOR OUTIC52(2/2)IC13TC74HC4051APIC51SN761200NQ51 Q52VIDEOREC COMP PLAY VIDEO COMPVIDEO 1VIDEO 2VIDEO 3VIDEO 4(FRONT)AV AUXVIDEO 1VIDEO 2IC11,12SN761200Nx2Q11wd/pcb 98.12.9 9:22 yW1KRF-V7771D/V8881D/VR-2080/2090(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 ON/OFF: OFF VOLUME LEVEL: -66dB AUDIO INPUT SELECTOR: TUNER VIDEO INPUT SELECTOR: