Kenwood-XVH-7-Service-Manual电路原理图.pdf

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1、STEREO AUTO REVERSE CASSETTE DECKX-VH7SERVICE MANUAL(VH-700)1999-5/B51-5532-00 (K/K) 3632Refer to X-E9and X-SA7service manuals (B51-4926-00/B51-5214-00),if you require in detail.646610607605660606604616661recordingfunction indicatorDolby NRB-typecrlsC-typedirectionejectstandbyon/standbyfwdrevrec/arm

2、crlsstoppausetape loading mechanismrev.modeDolby NRauto reverse cassette deck X-VH7pauseforwardreverserev.mode609654608J3J2633SYSTEMCONNECTORLRREC INREC OUTKnob (EJECT)(K29-7554-04)Side plate(A50-1326-02)Side plate(A50-1327-02)ACcord bushing(J42-0083-05)Dressing panel(A21-3764-02)Panel(A29-1052-14)P

3、anel(A60-1648-01)Insulator assy(J02-1444-04)Knob (POWER) *(K29-)Front glass(B10-3488-03)Dressing panel(A21-3758-02)Dressing panel(A21-3765-03)AC cord *(E30-)Phono jack(E63-0136-15)Rectangular receptacle(E08-0311-05)* Refer to parts list on page 13.70%X-VH7(K) COVER1,1P( 99.11.1 11:14 AM yW2X-VH72CON

4、TENTS / ACCESSORIESDISASSEMBLY FOR REPAIRCONTENTS / ACCESSORIES.2DISASSEMBLY FOR REPAIR.2CIRCUIT DESCRIPTION.3ADJUSTMENT.6PC BOARD.7SCHEMATIC DIAGRAM.9EXPLODED VIEW.12PARTS LIST.13SPECIFICATIONS.Back coverContentsAccessoriesAudio cord (2)(E30-0615-05)Front feet replacement tool (1)(Allen wrench)(W01

5、-0084-05)Replancement front feet (2)(J02-0130-05)System control cord (1)(E30-2628-05)Spacer for stacked installation (1)(J19-5996-02)REMOVE EARTH METAL341FRONTX28 (A/4)x22DECK MECHAASSEMBLYEARTH METAL65ELECTRIC CHECK1) Remove insulator assy, then remove somescrew of L,R side board(1). Next remove th

6、etop and the bottom boards, then remove thepower transformer and the rear panel assem-bling PCB.2) Connect GND between PCB and the deckmechanism with a alligator clip lead weir (2).REMOVE EARTH METALSupport the earth metal by your finger tokeep the shape, then pull up (3) and remove(4) the earth met

7、al .ASSEMBLE EARTH METALInsert the tip of the earth metal (5), then sup-port the earth metal by your finger, pushdown it (6). System configurationsSYSTEMRECEIVERCASSETTESPEAKERVH-600RD-VH7-LS-VH7VH-700RD-VH7X-VH7LS-VH7Operation to resetThe microcomputer may fall into malfunction (impossi-bility to o

8、perate, erroneous display, etc.) when thepower cord is unplugged while power is ON or due toan external factor. In this case, execute the followingprocedure to reset the microcomputer and return it tonormal condition.Please note that resetting the microcomputer clears the contentsstored in it return

9、s it to condition when it left the factory.Unplug the power cord from the AC outlet and, whileholding the “00eject“ key depressed, plug the powercord again.If a tape is loaded in the deck, it will be ejected now.X-VH7(K) COVER1,1P( 99.11.1 11:14 AM yW31-1 Features1)Single loading cassette deck.2)Equ

10、ipped with DPSS. UP search, DOWN search, 1 tunerepeat, RWD play, dash and play, REREC standby.3)Dolby NR B/C4)One touch edit.(only remocon)5)CRLS6)One touch operation1-2 Microprocessor periphery block diagram1-3 KEY matrix, LED matrix1-3-1 KEY matrixKS0(6)KS1(7)KS2(9)KS3(8)KR0(15)POWER7REV. MODECRLS

11、KR1(16)210KR2(14)38DOLBYKS0(6)KS1(7)KS2(9)KS3(8)LED0(19)EJECTSTANDBYDOLBY BRECORDINGLED1(20)PAUSECRLSREV. MODEDOLBY CLED2(18)- - - - - - - - REVERSEFORWARD- - - - - - - - 1-3-2 LED matrix( )u-COM IC PORTLEDDECK MECHA(ADR-2176ST)KEYMATRIXIC2SYSTEM ICHA12167FBSLOTMECHANISM310721343CXP84124-150uCOM (IC

12、1)22REC /PB CIRCUITSERIAL COMMUNICATION LINESIGNAL LINE/ CONTROL LINE3CIRCUIT DESCRIPTIONX-VH71. Deck Microprocessor : CXP 84124-150 (X28 : IC1)X-VH7(K) COVER1,1P( 99.11.1 11:14 AM yW64CIRCUIT DESCRIPTIONX-VH7PinNameI/OConnectDescription1S.BUSYI/OOPENSerial communication BUSY signalH: BUSYL: READY25

13、IOPENNo used69KS0,1,3,2OPUKEY SCAN 0,1,3,21416KR2,0,1IPDKEY RETURN 2,0,117IOPENNo used1820LED2,0,1OOPENLED drive output2,0,1L: ON21BACKLIGHT_ONOPDBACK LIGHT LED drive outputH: ON2229OOPENNo used30RESETIPUu-com RESET signal detectL: RESET31EXTALIOPENMAIN CLOCK(10MHz)32XTALOPEN33VSS(GND)GNDGND34TXOPEN

14、No used35TEX(GND)IGNDGND36AVSS(GND)GNDA/D converter GND37AVREF I+5VA/D converter reference voltage38SOLOPDMECHA solenoid controlH: ON39R_INH_FIPUFWD REC permission detect signal inputL: REC 40PHOTO SWIPUREAL drive pulse input41HALF_SWIPUCassette half detect signal inputL: CASSETTE EXIST 42PLAY SWIPU

15、MECHA HEAD position detectL: ON43TYPE IIIPUTYPE detect signal inputL: TYPE II44,45LEVEL L/RIPDLch/Rch level input46R_INH_RIPURVS. REC permission detect signal inputL: REC 47CPMOPDCapstan motor controlH: ON48CLOCKOOPENSystem IC CLOCK output49REC/PLAYOOPENREC/PLAY changeoverH: RECL: PLAY50ERASEOPDERAS

16、E HEAD control outputH: ON 51DATAOOPENSystem IC DATA output52STBOOPENSystem IC STROBE signal output5359OOPENNo used60BIAS NOROPDBIAS CONTROLH: NORMAL TAPE6163IOPENNo used64SLOT OPENOOPENSLOT OPEN motor controlH: ON65SLOT CLOSEOOPENSLOT CLOSE motor controlH: ON 66CLOSE SWOPUSLOT CLOSE detect SW input

17、L: ON 67OPEN SWOPUSLOT OPEN detect SW inputL: ON 68OOPENNo used69CEOPUAC OFF detect signal inputL: AC OFF70DOLBY_RESETOOPENDOLBY IC RESET controlL: RESET71OOPENNo used72VDD(+5V)+5Vpower supply73+5VNo used(Connect to VDD(+5V)7470/120OPDPLAY equalizer control outputH: 70sL: 120s75,76OOPENNo used77AVR_

18、OFFOPDCircuit AVR ON/OFF controlH: AVR ON78LINE MUTEOPDLINE MUTE control outputL: MUTE ON79REC MUTEOPDREC MUTE control outputL: MUTE ON80S.DATAI/OOPENSerial communication DATA signal1-4 Pin descriptionX-VH7(K) COVER1,1P( 99.11.1 11:14 AM yW55X-VH7CIRCUIT DESCRIPTIONITEMSTATEPOWEROFFDOLBYOFFR/PPLAYRE

19、C MUTEONLINE MUTEONBIASOFFERASEOFFREC LEVEL(E. VOL)-15dBSOLOFFCPMON(500ms) OFFDIRECTIONFORWARDREVERSE MODEENDLESS MODE2. DEFAULT STATES2-1 Main unit default states3. TEST MODE3-1 Setting methodWhile pressing the FWD key, plug the power cord to theAC wall outlet.(Setting up: MUTE ON)Set up REC level

20、: -15dBAll LED lighting, then be cancelled to press a key andinsert a tape.Insert a tape or press the STOP key, then LEDs displaythe leaf SW movement of the mechanism. (ON:LED lighting, OFF:No LED lighting)DOLBY-B: Mistake REC FWDDOLBY-C: Mistake REC REVREV-MODE: PACK DETECT SWCRLS: CrO2 DETECT SW3-

21、2 Initializing methodWhile pressing the EJECT key, plug the power cord tothe AC wall outlet.Jump out a tape compulsion, then LED STANDBY beblinked and lighted .3-3 Cancel test mode1) AC power OFF: initialize and cancel the test mode.2) Press the PAUSE key ,then be stopped the mecha-nism and be cance

22、lled the test mode on POWER ON.(No jump out a tape compulsion)3-4 TEST MODE specifications1) The keys are activated normal except the test modeindicating key .2) No mute control by the mode changeover. But mute onby POWER ON/OFF.3-5 Set inspection test mode3-5-1 REC/PB inspection Press the REC key:

23、1REC(4sec.)2REVERSE(4sec.)3Start PLAY automatically.But press the REC key with recording again, the record-ing time be extended for 4 sec per one press.3-5-2 Test mode initializing conditionPress the STOP key,then be stopped the mechanismmovement. (But no change of the system IC/IC2 setting up)And L

24、EDs display normal with the leaf SW.3-5-3 REC level changeover Press the CRLS key, changeover REC level.LEVEL display: -15dB(LED CRLS blinking)0dB(LEDREV.MODE blinking)X-VH7(K) COVER1,1P( 99.11.1 11:14 AM yW76X-VH7ADJUSTMENTCASSETTE DECKNO.ITEMINPUTSETTINGSOUTPUTSETTINGSCASSETTE DECKSETTINGSALIGNMEN

25、TALIGN FORFIG.Unless otherwise specified, set the respective switches as follows:TAPE: NORMAL DOLBY: OFF INPUT: REC IN OUTPUT: PLAY OUT0dBm=0.775V. Cassette mechanism (REC/PB head adjustment)Demagnetizationand cleaning-(POWER OFF)demagnetization(PLAY)cleaningREC/PB headerase headcapstanpinch rollerD

26、emagnetize the REC/PB head byhead eraser. Clean the REC/PB head,eraser head, capstan and pinchroller with a cotton swab immersedin alcohol.REC/PB headazimuthTCC-153MTT-11410kHz,-10dB(B)PLAYAdjust the output to maximum andadjust the azimuth adjustmentscrew for the Lissajous waveformpattern of the osc

27、illoscope tobecome close to a 45 straight line. Capstan motor adjustmentTape speed(NORMAL)TCC-110MTT-1113kHz(B)PLAYVR.inside motorAdjust so that the frequency 3kHzat the center of the tape. PC board adjustmentPlayback levelTCC-130(B)PLAYVR1,2-1dBmRecording levelTCC-108400Hz-21dBm(A)(B)VR5,6-21dBmBia

28、s currentTCC-10812.5kHz-21dBm(A)VR3,4-21dBmMeasurement equipment connectionRVSFWDSYSTEMCONNECTORLRREC INREC OUT(A)(B)AC voltmeterAC voltmeterOscilloscopeDistortion meterAGX-VH7(K) COVER1,1P( 99.11.1 11:14 AM yW8R50R114R112R46R113R48R117R116R47R115R118R125R45R126R128R127R121R123R122R102R101C15R103R56

29、R57R58C26R33R59C16C19C23C24R51R107R108R111R110R109R106R54R53R55R105R104R129R210R209C5C9R151R138R137R152R155R154R132R131R130R133R136R135R134R156R27R26R28R161R160R29R159R158C124C129C122C123C130C141C139C121R4R40R2R39C109C110C152C151C143C144C142C140C149C150C148R31R30R34R32R35R3R44R41R43R5R37R36R42C101R1

30、2R11C107R13C108R7R6R9R8R21R20C102R16R17R68W103C226W105W104W101W102R213R208R214R211R212R224R215R221R207R203R202R201R206 R205C202C205C201C206R216R225R220R219R38R22R23W106W100W108W107R204EBEBEBEB202140 416061801801242540 416465EBEBEBEBEBEBR67Q28Q31Q8Q9Q18Q29Q17Q30IC1IC2Q33Q32C1GNDBUSYSGNDS D ATACERECPL

31、AYRESETREQ-LPB-RRIN FINCLOSE-SWOPEN-SWPB-RFMFQF/QNORCRO2120/7012V12V -GNDGND5VGNDGND5VNORRESETLEVEL-RLEVEL-L13VREC IN-R120/70REQ-LPB-L13V13VGNDLINE-MUTE REC-MUTEGNDPB RchPB LchX1W62R24R60R25R19R14R10R18R15C228L2L1C134C133C214C136C135C132C128C127C131C213C157C153C154C155C156C22C18C104C113C25C103C10C11

32、C6C7C14C17C12C13C125C114C126W43C8C147C2C3C4W31C224W55W66W71W49W40W54W46C115C116C117C212 C211C118C120C119W41W39VR1W64W67R124W7W25R162W50W51R153W45W44W70W38R1C105W42W59W29W52R145C106W57W34W16C229W35W53W68W61VR2R146 R147 R148 R149 R150R144R143R142R141R140R139W65R222C223C222L5W11W5W30W24R157W10R49W23W27

33、W36W14W19W37W26W20W32W33W8W63W69W6W9W21W15R223R226R227W17W60R52W47W48W58W56C209C221C218C210C220C204C203C225C215C216C208 C207R218R217C217W22C219L3L4W12C227W28VR3VR4W18W13R228REC13VAV RBIAS RLREC LchDOLBY NR12VAVRMICRO-COMPBIAS OSCPB EQAVR5VR61VR5VR6RchGHGLGP1 81 91712910BE BEBE131110151 410291121BBEB

34、EBBBEEBBEBEBEOIGEEBEBEEEBEBEBEBBEEBEBBEEBBEE BR632112PAUSEFWDCRLSRVSW1MODEREVB NR CPWRR64121R621 8RVSFWDSTOPPAUSE1218REWFFRECCRLSW3W4R66MODEDOLBYW2REVSTAND BYR65RECEJECTOUTINCONTROLSYSTEMCN3P1Q34D24D7D2D3 D4 D5IC6D25D17D18D19Q11J3CN6D26Q1Q2J2Q10D20 D22 D21Q19D23Q24D55D56Q36D1IC3Q12Q20E2E3Q35Q3E1CN7D

35、27D28Q16Q15J1Q6Q7D11D10Q4 Q5D9D8D12D13D6D16Q13Q14D15D14D29D32D31IC5Q25 Q22Q23Q21IC4Q27Q26CN8CN4CN1CN2CN5CN9P2D37S3WH1D54CN11WH3D45D53D52D51D50S12E4CN10S4D49D33WH2S1 S2WH2D38D34D35D36D41D40S8D39S6S5S7D43D42S9S10D48D46D47D44 S11X28 C/5X28 D/5X28 E/5X28 B/5X28-2990-00 A/5 (J70-1310-01)ACEGIBDFHJ2 1357

36、46Refer to the schematic diagram for the value of resistors and capacitors. PC BOARD (Component side view)78X-VH7(K) PCB/SD1,2P( 99.11.1 11:18 AM yW1ABDFHJCEGI2 1357 46CN9CN8CN5CN7CN6u-COMQ23Q21Q22Q25D31Q26Q27(1/2)IC5(2/2)IC5D32Q18Q20Q19Q17ON/OFF 70uSD29D56D55D23Q24Q31Q30Q29Q28Q36Q12CN10WH2 WH2WH1CN

37、11WH3D33S12D45D52CRLSD50DOLBYCD49DOLBYBD51REV MODED54D53D34S1D38S5D40S7S11D44RECEJECTD41REV.MODED43S10S3STOPCRLSS8D36D39DOLBYNRD42S9S4PAUSES6D37FWDD35S2D47D48D46STAND BYRECEJECTREVON STANDBYFWDREVPAUSE1/ON/OFFCURRENTDRIVERBACK LIGHTPHOTODETECTRESETTRAYOPEN/CLOSEBIAS OSCNOR/CrO2R RECON/OFF BIASEHCONT

38、EQ PBR/PSELECTPB/LPB/RMPXMPX/R RECMUTE RECRECMUTE ON/OFF 70uS/L RECIC SYSTEMD47,48: B30-2545-05D46: B30-2551-05D45,49-54: B30-2555-05D24: RD4.7ES(B2) or MTZJ4.7(B)D12,29: RD5.1ES(B2) or MTZJ5.1(B)D10: RD11ES(B2) or MTZJ11(B)D8,9: RD6.2ES(B2) or MTZJ6.2(B)31-44,55-56: 1SS133 or HSS104AD6,7,11,13-23,2

39、5-28,D2-5: S5688B or 1SR139-400D1: D2SBA20F03Q28-31: UN5119 or DTA113ZUAQ24,25: 2SC3940A(R,S) or 2SD863(E,F)Q21-23,34: UN4212 or DTC124ESAQ15,16,19,20: 2SD1450(S,T)Q13,14: UN4112 or DTA124ESAQ10,11:2SA1286-T11Q8,9,17,18,32,33: UN5212 or DTC124EUAQ4-7,12,26,27,36: 2SC2785(F,E) or 2SC2458(Y,GR)Q3,35:

40、2SD2525Q1,2: 2SD2061 or 2SD2012IC6: BA6209IC5: BA328IC4: BA3126NIC3: PST993D-TIC2: HA12167FBIC1: CXP84124-150QREC-FHALFCrO2REC-RCAPSTANMOTORMODE SWOPEN SWCLOSE SWMOTORLOADINGMECHANISM ASSYD40-1636-05R/P/E HEAD (PCB)Lch RchERASER/PHEADDIGITALLINEGND LINE SIGNALLINEB LINEHEADRchLchIC1IC4IC6(X28- ) (C/

41、5)(B38-0179-05)LED DISPLAY(X28- ) (D/5)(X28- ) (E/5)(X28-2990-00) (B/5)(X28-2990-00) (A/5)IC2-function indicator-Dolby NRB-type c-typedirectionreverse forwardpausecrlsrev. mode0V0V0V13.0V0V0VREC :5.1V PLAY:0V1.4V0.9V5.6V0.9V9.0V1.4V5.5VMETAL:10.0VHI :10.0VREC NOR :6.9VREC NOR :6.9VHI :10.0VMETAL:10.

42、0VHI,METAL:10.5VPLAY,STOP:0.3VREC,NOR :7.2V0V0V13.0V9.1V9.1V0V5.1V0V0V0V0.6V6.2V 1.2V 6.3V 1.9V 2.0V 6.3V 2.1V6.4V 6.4V1.7V 6.4V1.2V 0V6.4V6.4V 6.4V6.4V0V6.5V6.1V6.9V6.5V7.0V0V6.5V7.0V0.3V0V0V12.8V0V1.2V1.2V0.6V0V0V0V1.3V1.2V1.2V1.2V1.2V0V 0.2V5.1V 0.2V 6.4V0.2V 6.4V 2.1V 2.1V 6.4V 2.2V 6.5V1.8V 6.6

43、V 6.6V 0V 6.5V6.5V6.5V0V0.6V 0V0.6V5.1V5.1V0V0V5.0V0V 0V 5.1V 5.1V5.1V 4.8V 5.1V 0V 0V5.1V 2.4V 2.4V5.1V 0V 5.1V5.1V0V1.7V5.0V5.1V1.8V0V4.3V3.5V5.0V4.1V3.1V4.1V4.1V4.2V4.2V4.2V3.2V5.2V2.0V3.8V0V2.3V2.1V0.6V4.9V0.5V12.2V0.9V0.9V0V0V5.0V0.5V0V+B123456712345CLOSE-SWOPEN-SWGNDMOTOR-(CW)MOTOR+(CCW)123456

44、789101112LED-5V5VCONLED-RETKS0KS1KS3KS2KR2KR0KR1LED G2LED G0LED G1646362616059585756555453525150494847464544434241123456789101112131415161718192021222324RIND ATACLKNCNORMALNCBACKLIGHT(PWM)GNDGNDGNDGNDNCSTBD ATAERASEREC/PLA YCLK SYSTEM ICCPMRREC-SWLEVEL.RLEVEL.LCrO2SWPLA YSWP ACKSWS.BUSYNCNCNCNCKS0KS

45、1KS3KS2NCNCNCNCKR2KR0KR1NCLED2LED0LED1BACK-LIGHTNCNCNC12345678910EH GNDPLAYL13VPLAYRPLAY/RECREC LERASEREC RNOR123456789108746152310KR2211KR2222.2KR2251/4WR224 10K10u16C220+C22922u1610R223150K R2086.8K R2060.022 C208C2070.022 R207150KR2056.8KL5C22122u16+C222 5600PC228 0.01R219 27K5600PC22327KR220C224

46、0.016800P33KR21533KR216220P C218 220P C217VR3220K220KVR4390PC205390PC20622u16C209+22u16C210+10u16C203+10u16C204+C201680PC202680P132547698C216220P220PC215C226110u16C227+EQVOLSBITDACDACSBITVOL2 1345678REC OUT9111ASBITDACSBITDACDOLBYB/C NRE. VOLRECTEQLMAE. VOL1ADOLBYB/C NRREC OUTLMARECTIREFNC NNHC HN N

47、MRECEQEQ-CONTROLERSBITDACSBITDACMPXRECEQSWON/OFFC/BILLLOGIC605958575653 55545251504943 46 4847454441R1103.9KL2C1086800PR2261K100u16C225+4.7u35C105+4.7u35C106+R2091.5K1.5K R21010KVR2+ +C2144.7u35C2134.7u35101.5KR1081u50+10u16C104R10433KC144 1C10310u16+C143 118KR158C2123300PC21 13300PVR110K61626365646

48、667686970727173757778797476802112131415161720 19 1822232425262728293130323736353433384039HMGPGLGHF/QFQFMBIASVCCVCCBIASCONTGNDNMCBIASADJ39KR1066800PC107L1R1093.9KR1071.5K22KR1 142200PC1 164.7u35C1 14+2.2K R1120.033 C1102200PC118R116 560C120 2200PC122 0.1C124 0.1C126 10u16+4.7K R118C130 0.1C132 2.2u50+R126 10K2.2u50C128+1.1KR12247K VR647KR1304.7K R128+C136 10u16R159 24KC134 1u50+R124 3.9KC12