Kenwood-XVH7-tape-sm 维修电路原理图.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-E9 and X-SA7 service manuals (B51-4926-00/B51-5214-00),if you require in detail.646610607605660606604616661recordingfunction indicatorDolby NRB-typecrlsC-typedirectionejectstandbyon/standbyfwdrevrec/

2、armcrlsstoppausetape loading mechanismrev.modeDolby NRauto reverse cassette deck X-VH7pauseforwardreverserev.mode609654609654608J3J2633SYSTEMCONNECTORLRREC 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-

3、1052-14)Panel(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 yW

4、2RadioFans.CN 收音机爱 好者资料库X-VH72CONTENTS / 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 fe

5、et replacement tool (1)(Allen wrench)(W01-0084-05)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 MECHAASSEMBLY EARTH METAL65ELECTRIC CHECK1) Remove insulator assy, then remove some

6、screw of L,R side board(1). Next remove thetop 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, th

7、en pull up (3) and remove(4) the earth metal .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

8、fall into malfunction (impossi-bility to operate, 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 microcomp

9、uter clears the contentsstored in it returns 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 yW 3Radio

10、Fans.CN 收音机爱 好者资料库1-1 Features1) Single loading cassette deck.2) Equipped 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

11、matrix1-3-1 KEY matrixKS0(6)KS1(7)KS2(9)KS3(8)KR0(15)POWER7REV. MODECRLSKR1(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)

12、KEYMATRIXIC2SYSTEM ICHA12167FBSLOTMECHANISM310721343CXP84124-150uCOM (IC1)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 yW 64CIRCUIT DESCRIPTIONX-VH7PinNameI/OConnectD

13、escription1S.BUSYI/OOPENSerial communication BUSY signalH: BUSYL: READY25IOPENNo 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 dete

14、ctL: RESET31EXTALIOPENMAIN CLOCK(10MHz)32XTALOPEN33VSS(GND)GNDGND34TXOPENNo used35TEX(GND)IGNDGND36AVSS(GND)GNDA/D converter GND37AVREF I+5VA/D converter reference voltage38SOLOPDMECHA solenoid controlH: ON39R_INH_FIPUFWD REC permission detect signal input L: REC 40PHOTO SWIPUREAL drive pulse input4

15、1HALF_SWIPUCassette half detect signal inputL: CASSETTE EXIST 42PLAY SWIPUMECHA HEAD position detectL: ON43TYPE IIIPUTYPE detect signal inputL: TYPE II44,45LEVEL L/RIPDLch/Rch level input46R_INH_RIPURVS. REC permission detect signal input L: REC 47CPMOPDCapstan motor controlH: ON48CLOCKOOPENSystem I

16、C CLOCK output49REC/PLAYOOPENREC/PLAY changeoverH: RECL: PLAY50ERASEOPDERASE HEAD control outputH: ON 51DATAOOPENSystem IC DATA output52STBOOPENSystem IC STROBE signal output5359OOPENNo used60BIAS NOROPDBIAS CONTROLH: NORMAL TAPE6163IOPENNo used64SLOT OPENOOPENSLOT OPEN motor controlH: ON65SLOT CLOS

17、EOOPENSLOT CLOSE motor controlH: ON 66CLOSE SWOPUSLOT CLOSE detect SW inputL: 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)7

18、470/120OPDPLAY equalizer control outputH: 70sL: 120s75,76OOPENNo used77AVR_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( 99.1

19、1.1 11:14 AM yW 55X-VH7CIRCUIT DESCRIPTIONITEMSTATEPOWEROFFDOLBYOFFR/PPLAYREC 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, plu

20、g the power cord to theAC wall outlet.(Setting up: MUTE ON)Set up REC level : -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 R

21、EC FWDDOLBY-C: Mistake REC REVREV-MODE: PACK DETECT SWCRLS: CrO2 DETECT SW3-2 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 t

22、est mode.2) Press the PAUSE key ,then be stopped the mecha-nism and be cancelled 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

23、/OFF.3-5 Set inspection test mode3-5-1 REC/PB inspection Press the REC key: 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 stopp

24、ed the mechanismmovement. (But no change of the system IC/IC2 setting up)And LEDs 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 yW 76X-VH7ADJUSTM

25、ENTCASSETTE DECKNO.ITEMINPUTSETTINGSOUTPUTSETTINGSCASSETTE DECKSETTINGSALIGNMENTALIGN 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-(P

26、OWER OFF)demagnetization(PLAY)cleaningREC/PB headerase headcapstanpinch rollerDemagnetize 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 and

27、adjust the azimuth adjustmentscrew for the Lissajous waveformpattern of the oscilloscope 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 lev

28、elTCC-130(B)PLAYVR1,2 -1dBmRecording levelTCC-108400Hz-21dBm(A)(B)VR5,6 -21dBmBias 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 yW 8R50R11

29、4R112R46R113R48R117R116R47R115R118R125R45R126R128R127R121R123R122R102R101C15R103R56R57R58C26R33R59C16C19C23C24R51R107R108R111R110R109R106R54R53R55R105R104R129R210R209C5C9R151R138R137R152R155R154R132R131R130R133R136R135R134R156R27R26R28R161R160R29R159R158C124C129C122C123C130C141C139C121R4R40R2R39C109

30、C110C152C151C143C144C142C140C149 C150C148R31R30R34R32R35R3R44R41R43R5R37R36R42C101R12R11C107R13C108R7R6R9R8R21R20C102R16R17R68W103C226W105W104W101W102R213R208R214R211R212R224R215R221R207R203R202R201R206R205C202C205C201C206R216R225R220R219R38R22R23W106W100W108W107R204EBEBEBEB2021404160618018012425404

31、16465EBEBEBEBEBEBR67Q28Q31Q8Q9Q18Q29Q17Q30IC1IC2Q33Q32C1GNDBUSYSGNDSDATACERECPLAYRESETREQ-LPB-RRINFINCLOSE-SWOPEN-SWPB-RFMFQF/QNORCRO2120/7012V12V-GNDGND5VGNDGND5VNORRESETLEVEL-RLEVEL-L13VREC IN-R120/70REQ-LPB-L13V13VGNDLINE-MUTEREC-MUTEGNDPB RchPB LchX1W62R24R60R25R19R14R10R18R15C228L2L1C134C133C21

32、4C136C135C132C128C127C131C213C157C153C154C155C156C22C18C104C113C25C103C10C11C6C7C14C17C12C13C125C114C126W43C8C147C2C3C4W31C224W55W66W71W49W40W54W46C115C116C117C212C211C118C120C119W41W39VR1W64W67R124W7W25R162W50W51R153W45W44W70W38R1C105W42W59W29W52R145C106W57W34W16C229W35W53W68W61VR2R146R147R148R149R

33、150R144R143R142R141R140R139W65R222C223C222L5W11W5W30W24R157W10R49W23W27W36W14W19W37W26W20W32W33W8W63W69W6W9W21W15R223R226R227W17W60R52W47W48W58W56C209C221C218C210C220C204C203C225C215C216C208C207R218R217C217W22C219L3L4W12C227W28VR3VR4W18W13R228REC13VAVRBIASRLREC LchDOLBY NR12VAVRMICRO-COMPBIAS OSCPB

34、EQAVR5VR61VR5VR6RchGHGLGP18191712910B EB EB E131110151410291121BBEBEBBBEEBBEB EB EOIGEEBEBEEEBEB EBEBBEEBEBBEEBBEEBR632112PAUSEFWDCRLSRVSW1MODEREVB NR CPWRR64121R6218RVSFWDSTOPPAUSE1218REWFFRECCRLSW3W4R66MODEDOLBYW2REVSTAND BYR65RECEJECTOUTINCONTROLSYSTEMCN3P1Q34D24D7D2D3D4D5IC6D25D17D18D19Q11J3CN6D

35、26Q1Q2J2Q10D20D22D21Q19D23Q24D55D56Q36D1IC3Q12Q20E2E3Q35Q3E1CN7D27D28Q16Q15J1Q6Q7D11D10Q4Q5D9D8D12D13D6D16Q13Q14D15D14D29D32D31IC5Q25Q22Q23Q21IC4Q27Q26CN8CN4CN1CN2CN5CN9P2D37S3WH1D54CN11WH3D45D53D52D51D50S12E4CN10S4D49D33WH2S1S2WH2D38D34D35D36D41D40S8D39S6S5S7D43D42S9S10D48D46D47D44S11X28 C/5X28 D/5

36、X28 E/5X28 B/5X28-2990-00 A/5 (J70-1310-01)ACEGIBDFHJ2135746Refer 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 y W 1ABDFHJCEGI2135746CN9CN8CN5CN7CN6u-COMQ23Q21Q22Q25D31Q26Q27(1/2)IC5(2/2)IC5D32Q18Q20Q19Q17ON/

37、OFF70uSD29D56D55D23Q24Q31Q30Q29Q28Q36Q12CN10WH2WH2WH1CN11WH3D33S12D45D52CRLSD50DOLBY CD49DOLBY BD51REV MODED54D53D34S1D38S5D40S7S11D44RECEJECTD41REV.MODED43S10S3STOPCRLSS8D36D39DOLBY NRD42S9S4PAUSES6D37FWDD35S2D47D48D46STAND BYRECEJECTREVON STANDBYFWDREVPAUSE1/ON/OFFCURRENT DRIVERBACK LIGHTPHOTODETE

38、CTRESETTRAYOPEN/CLOSEBIAS OSCNOR/CrO2R RECON/OFFBIASEHCONTEQPBR/P SELECTPB/LPB/RMPXMPX/RRECMUTERECRECMUTEON/OFF70uS/LRECICSYSTEMD47,48: 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 MTZ

39、J6.2(B) 31-44,55-56: 1SS133 or HSS104AD6,7,11,13-23,25-28,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 DTC124EUA

40、Q4-7,12,26,27,36: 2SC2785(F,E) or 2SC2458(Y,GR)Q3,35: 2SD2525Q1,2: 2SD2061 or 2SD2012IC6: BA6209IC5: BA328IC4: BA3126NIC3: PST993D-TIC2: HA12167FBIC1: CXP84124-150QREC-FHALFCrO2REC-RCAPSTANMOTORMODE SWOPEN SWCLOSE SWMOTORLOADINGMECHANISM ASSY D40-1636-05R/P/E HEAD (PCB)LchRchERASER/P HEADDIGITAL LIN

41、EGND LINESIGNAL LINEB LINEHEADRchLchIC1IC4IC6(X28- ) (C/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 :5.1VPLAY :0V1.4V0.9V5.6V0.9V9.0V1.4V5.5VMETAL :1

42、0.0VHI :10.0VREC NOR :6.9VREC NOR :6.9VHI :10.0VMETAL :10.0VHI,METAL :10.5VPLAY,STOP :0.3VREC,NOR :7.2V0V0V13.0V9.1V9.1V0V5.1V0V0V0V0.6V6.2V1.2V6.3V1.9V2.0V6.3V2.1V6.4V6.4V1.7V6.4V1.2V0V6.4V6.4V6.4V6.4V0V6.5V6.1V6.9V6.5V7.0V0V6.5V7.0V0.3V0V0V12.8V0V1.2V1.2V0.6V0V0V0V1.3V1.2V1.2V1.2V1.2V0V0.2V5.1V0.2

43、V6.4V0.2V6.4V2.1V2.1V6.4V2.2V6.5V1.8V6.6V6.6V0V6.5V6.5V6.5V0V0.6V0V0.6V5.1V5.1V0V0V5.0V0V0V5.1V5.1V5.1V4.8V5.1V0V0V5.1V2.4V2.4V5.1V0V5.1V5.1V0V1.7V5.0V5.1V1.8V0V4.3V3.5V5.0V4.1V3.1V4.1V4.1V4.2V4.2V4.2V3.2V5.2V2.0V3.8V0V2.3V2.1V0.6V4.9V0.5V12.2V0.9V0.9V0V0V5.0V0.5V0V+B123456712345CLOSE-SWOPEN-SWGNDMO

44、TOR-(CW)MOTOR+(CCW)123456789101112LED-5V5VCONLED-RETKS0KS1KS3KS2KR2KR0KR1LED G2LED G0LED G1646362616059585756555453525150494847464544434241123456789101112131415161718192021222324RINDATACLKNCNORMALNCBACKLIGHT(PWM)GNDGNDGNDGNDNCSTBDATAERASEREC/PLAYCLK SYSTEM ICCPMRREC-SWLEVEL.RLEVEL.LCrO2SWPLAYSWPACKS

45、WS.BUSYNCNCNCNCKS0KS1KS3KS2NCNCNCNCKR2KR0KR1NCLED2LED0LED1BACK-LIGHTNCNCNC12345678910EH GNDPLAY L13VPLAY RPLAY/RECREC LERASEREC RNOR123456789108746152310KR2211KR2222.2KR2251/4WR224 10K10u16C220+C22922u1610R223150KR2086.8KR2060.022C208C2070.022R207150KR2056.8KL5C22122u16+C222 5600PC228 0.01R219 27K56

46、00PC22327KR220C2240.016800P33KR21533KR216220PC218220PC217VR3220K220KVR4390PC205390PC20622u16C209+22u16C210+10u16C203+10u16C204+C201680PC202680P132547698C216220P220PC215C226110u16C227+EQVOLSBITDACDACSBITVOL21345678REC OUT9111ASBITDACSBITDACDOLBYB/C NRE. VOLRECTEQLMAE. VOL1ADOLBYB/C NRREC OUTLMARECTIR

47、EFNCNNHCHNNMRECEQEQ-CONTROLERSBITDACSBITDACMPXRECEQSWON/OFFC/BILLLOGIC60595857565355545251504943464847454441R1103.9KL2C1086800PR2261K100u16C225+4.7u35C105+4.7u35C106+R2091.5K1.5KR21010KVR2+C2144.7u35C2134.7u35101.5KR1081u50+10u16C104R10433KC144 1C10310u16+C143 118KR158C2123300PC2113300PVR110K6162636

48、5646667686970727173757778797476802112131415161720191822232425262728293130323736353433384039HMGPGLGHF/QFQFMBIASVCCVCCBIASCONTGNDNMCBIASADJ39KR1066800PC107L1R1093.9KR1071.5K22KR1142200PC1164.7u35C114+2.2KR1120.033C1102200PC118R116 560C120 2200PC122 0.1C124 0.1C126 10u16+4.7KR118C130 0.1C132 2.2u50+R12

49、6 10K2.2u50C128+1.1KR12247KVR647KR1304.7KR128+C136 10u16R159 24KC134 1u50+R124 3.9KC129 0.1C135 10u16+C133 1u50+R115 5603.9KR123R1112.2KC1090.033R11322K2200PC1152200PC117C123 0.1C121 0.1C119 2200P+C125 10u16C131 2.2u50+R125 10KVR547K4.7KR1174.7KR127R12947K+C1272.2u50R1211.1KC155 1u50+42+C156 1u50C15

50、7 1u50+C142100PR156 1KR155 5.6KC140 56PC139 18PC141 18PR154 5.6KR153 5.6KR131R151R152 62KR157 3.9KR132R144 220KR143 56KR149 47KR150 220KR142 43KR148 39KR145 150KR139 62KR140 51KR146 82KR147 75KR141 47K100u16C147+2.2R162C113 4.7u35+52514850494950679878792910786453165641KR571KR58C23 0.1393820191843424