Kenwood-XVH7-tape-sm 电路图 维修手册.pdf

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1、STEREO AUTO REVERSE CASSETTE DECK X-VH7 SERVICE MANUAL (VH-700) 1999-5/B51-5532-00 (K/K) 3632 Refer to X-E9 and X-SA7 service manuals (B51-4926-00/B51-5214-00), if you require in detail. 646610607605660 606604616661 recording function indicator Dolby NR B-type crls C-type direction eject standby on/

2、standby fwd rev rec /arm crls stop pause tape loading mechanism rev.modeDolby NR auto reverse cassette deck X-VH7 pause forwardreverse rev.mode 609654609654 608 J3J2633 SYSTEM CONNECTOR L R REC INREC OUT Knob (EJECT) (K29-7554-04) Side plate (A50-1326-02) Side plate (A50-1327-02) ACcord bushing (J42

3、-0083-05) Dressing panel (A21-3764-02) Panel (A29-1052-14) 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

4、 to parts list on page 13. 70% X-VH7(K) COVER1,1P( 99.11.1 11:14 AM yW 2 RadioFans.CN 收音机爱 好者资料库 X-VH7 2 CONTENTS / ACCESSORIES DISASSEMBLY FOR REPAIR CONTENTS / ACCESSORIES . 2 DISASSEMBLY FOR REPAIR.2 CIRCUIT DESCRIPTION.3 ADJUSTMENT.6 PC BOARD . 7 SCHEMATIC DIAGRAM . 9 EXPLODED VIEW .12 PARTS LIS

5、T.13 SPECIFICATIONS .Back cover Contents Accessories Audio cord (2) (E30-0615-05) Front feet 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 METAL 3 4 1 FR

6、ONT X28 (A/4) x2 2 DECK MECHA ASSEMBLY EARTH METAL 6 5 ELECTRIC CHECK 1) Remove insulator assy, then remove some screw of L,R side board(1). Next remove the top and the bottom boards, then remove the power transformer and the rear panel assem- bling PCB. 2) Connect GND between PCB and the deck mecha

7、nism with a alligator clip lead weir (2). REMOVE EARTH METAL Support the earth metal by your finger to keep the shape, then pull up (3) and remove (4) the earth metal . ASSEMBLE EARTH METAL Insert the tip of the earth metal (5), then sup- port the earth metal by your finger, push down it (6). System

8、 configurations SYSTEMRECEIVERCASSETTESPEAKER VH-600RD-VH7-LS-VH7 VH-700RD-VH7X-VH7LS-VH7 Operation to reset The microcomputer may fall into malfunction (impossi- bility to operate, erroneous display, etc.) when the power cord is unplugged while power is ON or due to an external factor. In this case

9、, execute the following procedure to reset the microcomputer and return it to normal condition. Please note that resetting the microcomputer clears the contents stored in it returns it to condition when it left the factory. Unplug the power cord from the AC outlet and, while holding the 00eject key

10、depressed, plug the power cord 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 3 RadioFans.CN 收音机爱 好者资料库 1-1 Features 1) Single loading cassette deck. 2) Equipped with DPSS. UP search, DOWN search, 1 tune repeat, RWD play, dash and play, REREC

11、standby. 3) Dolby NR B/C 4) One touch edit.(only remocon) 5) CRLS 6) One touch operation 1-2 Microprocessor periphery block diagram 1-3 KEY matrix, LED matrix 1-3-1 KEY matrix KS0(6)KS1(7)KS2(9)KS3(8) KR0(15)POWER7REV. MODECRLS KR1(16)210 KR2(14)38DOLBY KS0(6)KS1(7)KS2(9)KS3(8) LED0(19)EJECTSTANDBYD

12、OLBY BRECORDING LED1(20)PAUSECRLSREV. MODEDOLBY C LED2(18)- - - - - - - - REVERSEFORWARD- - - - - - - - 1-3-2 LED matrix ( )u-COM IC PORT LED DECK MECHA (ADR-2176ST) KEY MATRIX IC2 SYSTEM IC HA12167FB SLOT MECHANISM 3 107 21 3 4 3 CXP84124-150 uCOM (IC1) 2 2 REC /PB CIRCUIT SERIAL COMMUNICATION LINE

13、 SIGNAL LINE/ CONTROL LINE 3 CIRCUIT DESCRIPTION X-VH7 1. Deck Microprocessor : CXP 84124-150 (X28 : IC1) X-VH7(K) COVER1,1P( 99.11.1 11:14 AM yW 6 RadioFans.CN 收音机爱 好者资料库 4 CIRCUIT DESCRIPTION X-VH7 PinNameI/OConnectDescription 1S.BUSYI/OOPENSerial communication BUSY signalH: BUSYL: READY 25IOPENNo

14、 used 69KS0,1,3,2OPUKEY SCAN 0,1,3,2 1416KR2,0,1IPDKEY RETURN 2,0,1 17IOPENNo used 1820LED2,0,1OOPENLED drive output2,0,1L: ON 21BACKLIGHT_ONOPDBACK LIGHT LED drive outputH: ON 2229OOPENNo used 30RESETIPUu-com RESET signal detectL: RESET 31EXTALIOPENMAIN CLOCK(10MHz) 32XTALOPEN 33VSS(GND)GNDGND 34TX

15、OPENNo used 35TEX(GND)IGNDGND 36AVSS(GND)GNDA/D converter GND 37AVREF I+5VA/D converter reference voltage 38SOLOPDMECHA solenoid controlH: ON 39R_INH_FIPUFWD REC permission detect signal input L: REC 40PHOTO SWIPUREAL drive pulse input 41HALF_SWIPUCassette half detect signal inputL: CASSETTE EXIST 4

16、2PLAY SWIPUMECHA HEAD position detectL: ON 43TYPE IIIPUTYPE detect signal inputL: TYPE II 44,45LEVEL L/RIPDLch/Rch level input 46R_INH_RIPURVS. REC permission detect signal input L: REC 47CPMOPDCapstan motor controlH: ON 48CLOCKOOPENSystem IC CLOCK output 49REC/PLAYOOPENREC/PLAY changeoverH: RECL: P

17、LAY 50ERASEOPDERASE HEAD control outputH: ON 51DATAOOPENSystem IC DATA output 52STBOOPENSystem IC STROBE signal output 5359OOPENNo used 60BIAS NOROPDBIAS CONTROLH: NORMAL TAPE 6163IOPENNo used 64SLOT OPENOOPENSLOT OPEN motor controlH: ON 65SLOT CLOSEOOPENSLOT CLOSE motor controlH: ON 66CLOSE SWOPUSL

18、OT CLOSE detect SW inputL: ON 67OPEN SWOPUSLOT OPEN detect SW inputL: ON 68OOPENNo used 69CEOPUAC OFF detect signal inputL: AC OFF 70DOLBY_RESETOOPENDOLBY IC RESET controlL: RESET 71OOPENNo used 72VDD(+5V)+5Vpower supply 73+5VNo used(Connect to VDD(+5V) 7470/120OPDPLAY equalizer control outputH: 70s

19、L: 120s 75,76OOPENNo used 77AVR_OFFOPDCircuit AVR ON/OFF controlH: AVR ON 78LINE MUTEOPDLINE MUTE control outputL: MUTE ON 79REC MUTEOPDREC MUTE control outputL: MUTE ON 80S.DATAI/OOPENSerial communication DATA signal 1-4 Pin description X-VH7(K) COVER1,1P( 99.11.1 11:14 AM yW 5 5 X-VH7 CIRCUIT DESC

20、RIPTION ITEMSTATE POWEROFF DOLBYOFF R/PPLAY REC MUTEON LINE MUTEON BIASOFF ERASEOFF REC LEVEL(E. VOL)-15dB SOLOFF CPMON(500ms) OFF DIRECTIONFORWARD REVERSE MODEENDLESS MODE 2. DEFAULT STATES 2-1 Main unit default states 3. TEST MODE 3-1 Setting method While pressing the FWD key, plug the power cord

21、to the AC wall outlet.(Setting up: MUTE ON) Set up REC level : -15dB All LED lighting, then be cancelled to press a key and insert a tape. Insert a tape or press the STOP key, then LEDs display the leaf SW movement of the mechanism. (ON:LED lighting, OFF:No LED lighting) DOLBY-B: Mistake REC FWD DOL

22、BY-C: Mistake REC REV REV-MODE: PACK DETECT SW CRLS: CrO2 DETECT SW 3-2 Initializing method While pressing the EJECT key, plug the power cord to the AC wall outlet. Jump out a tape compulsion, then LED STANDBY be blinked and lighted . 3-3 Cancel test mode 1) AC power OFF: initialize and cancel the t

23、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 specifications 1) The keys are activated normal except the test mode indicating key . 2) No mute control by the mode changeover. But mute on by

24、POWER ON/OFF. 3-5 Set inspection test mode 3-5-1 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 condition Press the STOP key

25、,then be stopped the mechanism movement. (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(LED REV.MODE blinking) X-VH7(K) COVER1,1P( 99.11.1 11:14

26、AM yW 7 6 X-VH7 ADJUSTMENT CASSETTE DECK NO.ITEM INPUT SETTINGS OUTPUT SETTINGS CASSETTE DECK SETTINGS ALIGNMENTALIGN 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 adjust

27、ment) Demagnetization and cleaning - (POWER OFF) demagnetization (PLAY) cleaning REC/PB head erase head capstan pinch roller Demagnetize the REC/PB head by head eraser. Clean the REC/PB head ,eraser head, capstan and pinch roller with a cotton swab immersed in alcohol. REC/PB head azimuth TCC-153 MT

28、T-114 10kHz,-10dB (B)PLAY Adjust the output to maximum and adjust the azimuth adjustment screw for the Lissajous waveform pattern of the oscilloscope to become close to a 45 straight line. . Capstan motor adjustment Tape speed (NORMAL) TCC-110 MTT-111 3kHz (B)PLAY VR. inside motor Adjust so that the

29、 frequency 3kHz at the center of the tape. . PC board adjustment Playback levelTCC-130(B)PLAYVR1,2 -1dBm Recording level TCC-108 400Hz -21dBm (A) (B) VR5,6 -21dBm Bias current TCC-108 12.5kHz -21dBm (A) VR3,4 -21dBm Measurement equipment connection RVSFWD SYSTEM CONNECTOR L R REC INREC OUT (A)(B) AC

30、 voltmeterAC voltmeter Oscilloscope Distortion meter AG X-VH7(K) COVER1,1P( 99.11.1 11:14 AM yW 8 R50 R114 R112 R46 R113 R48 R117 R116 R47 R115 R118 R125 R45 R126 R128 R127 R121 R123 R122 R102 R101 C15 R103 R56 R57 R58 C26 R33 R59 C16 C19 C23 C24 R51 R107 R108 R111 R110 R109 R106 R54 R53 R55 R105 R1

31、04 R129 R210 R209 C5 C9 R151 R138 R137 R152 R155 R154 R132 R131 R130 R133 R136R135 R134 R156 R27 R26 R28 R161 R160 R29 R159 R158 C124 C129 C122 C123 C130 C141 C139 C121 R4 R40 R2 R39 C109 C110 C152 C151 C143 C144 C142 C140 C149 C150 C148 R31 R30 R34 R32 R35 R3 R44 R41 R43 R5 R37 R36 R42 C101 R12 R11

32、 C107 R13 C108 R7R6 R9 R8 R21 R20 C102 R16 R17 R68 W103 C226 W105 W104 W101 W102 R213 R208 R214 R211R212 R224 R215 R221 R207 R203 R202 R201 R206R205 C202 C205 C201 C206 R216 R225 R220R219 R38 R22 R23 W106 W100 W108 W107 R204 EBEBEBEB 20 21 40 41 6061 80 1 80 1 2425 40 41 6465 EB EB EB EB EB EB R67 Q

33、28Q31 Q8 Q9 Q18 Q29 Q17 Q30 IC1 IC2 Q33 Q32 C1 GND BUSY SGND SDATA CE RECPLAY RESET REQ-L PB-R RIN FIN CLOSE-SW OPEN-SW PB-R FM FQ F/Q NORCRO2 120/70 12V 12V-GND GND 5V GND GND 5V NOR RESET LEVEL-R LEVEL-L 13V REC IN-R 120/70 REQ-L PB-L 13V 13V GND LINE-MUTE REC-MUTE GND PB Rch PB Lch X1 W62 R24 R60

34、 R25 R19 R14 R10 R18 R15 C228 L2 L1 C134 C133 C214 C136 C135 C132 C128 C127 C131 C213 C157 C153 C154 C155 C156 C22 C18 C104 C113 C25 C103 C10 C11 C6 C7 C14 C17 C12 C13 C125 C114 C126 W43 C8 C147 C2 C3 C4 W31 C224 W55 W66 W71 W49 W40 W54 W46 C115 C116 C117 C212 C211 C118 C120 C119 W41 W39 VR1 W64 W67

35、 R124 W7 W25 R162 W50 W51 R153 W45 W44 W70 W38 R1 C105 W42 W59 W29 W52 R145 C106 W57 W34 W16 C229 W35 W53 W68 W61 VR2 R146 R147 R148 R149 R150 R144 R143 R142 R141 R140 R139 W65 R222 C223 C222 L5 W11 W5 W30 W24 R157 W10 R49 W23 W27 W36 W14 W19 W37 W26 W20 W32 W33 W8 W63 W69 W6 W9 W21 W15 R223 R226 R2

36、27 W17 W60 R52 W47 W48 W58 W56 C209 C221 C218 C210 C220 C204 C203 C225 C215C216 C208C207 R218 R217 C217 W22 C219 L3L4 W12 C227 W28 VR3 VR4 W18 W13 R228 REC 13V AVR BIASRL REC Lch DOLBY NR 12V AVR MICRO-COMP BIAS OSC PB EQ AVR 5V R61 VR5 VR6 Rch GH GL GP 18 1 9 1 7 1 2 9 10 B E B E B E 131 1 10 1 5 1

37、 4 102 9 1 121 B B E B EB BB EEBB E B E B E OI G EE B EB E E E B E B E B EB BE E B EB BE E B BE E B R63 2 1 12 PAUSE FWD CRLS RVS W1 MODE REV B NR C PWR R64 1 21 R62 18 RVS FWD STOP PAUSE 12 18 REW FF REC CRLS W3 W4 R66 MODEDOLBY W2 REV STAND BY R65 REC EJECT OUTIN CONTROL SYSTEM CN3 P1 Q34 D24 D7 D

38、2 D3 D4 D5 IC6 D25 D17 D18 D19 Q11 J3 CN6 D26 Q1 Q2 J2 Q10 D20 D22 D21 Q19 D23 Q24 D55 D56 Q36 D1 IC3 Q12 Q20 E2 E3 Q35Q3 E1 CN7 D27 D28 Q16 Q15 J1 Q6 Q7 D11 D10 Q4 Q5 D9 D8 D12 D13 D6 D16 Q13 Q14 D15 D14 D29 D32 D31 IC5 Q25 Q22 Q23 Q21 IC4 Q27Q26 CN8 CN4 CN1 CN2 CN5 CN9 P2 D37 S3 WH1 D54 CN11 WH3 D

39、45 D53 D52 D51 D50 S12 E4 CN10 S4D49 D33 WH2 S1 S2 WH2 D38 D34 D35 D36 D41 D40 S8 D39 S6 S5S7 D43D42 S9 S10 D48 D46 D47 D44 S11 X28 C/5 X28 D/5 X28 E/5 X28 B/5 X28-2990-00 A/5 (J70-1310-01) ACEGIBDFHJ 2 1 3 5 7 4 6 Refer to the schematic diagram for the value of resistors and capacitors. PC BOARD (C

40、omponent side view) 7 8 X-VH7(K) PCB/SD1,2P( 99.11.1 11:18 AM y W 1 ABDFHJCEGI 2 1 3 5 7 4 6 CN9 CN8 CN5 CN7CN6 u-COM Q23 Q21 Q22 Q25 D31 Q26 Q27 (1/2) IC5 (2/2) IC5 D32 Q18 Q20 Q19 Q17 ON/OFF 70uS D29 D56 D55 D23 Q24 Q31Q30Q29Q28 Q36 Q12 CN10 WH2 WH2 WH1 CN11 WH3 D33 S12 D45D52 CRLS D50 DOLBY C D49

41、 DOLBY B D51 REV MODE D54 D53 D34 S1 D38 S5 D40 S7S11 D44 RECEJECT D41 REV.MODE D43 S10S3 STOP CRLS S8 D36 D39 DOLBY NR D42 S9S4 PAUSE S6 D37 FWD D35 S2 D47D48D46 STAND BY REC EJECT REV ON STANDBY FWDREV PAUSE 1/ ON/OFF CURRENT DRIVER BACK LIGHT PHOTO DETECT RESET TRAY OPEN/CLOSE BIAS OSC NOR/CrO2 R

42、 REC ON/OFF BIAS EH CONT EQ PB R/P SELECT PB/L PB/R MPXMPX /R REC MUTE REC REC MUTE ON/OFF 70uS /L REC IC SYSTEM D47,48: B30-2545-05 D46: B30-2551-05 D45,49-54: B30-2555-05 D24: 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) 3

43、1-44,55-56: 1SS133 or HSS104A D6,7,11,13-23,25-28, D2-5: S5688B or 1SR139-400 D1: D2SBA20F03 Q28-31: UN5119 or DTA113ZUA Q24,25: 2SC3940A(R,S) or 2SD863(E,F) Q21-23,34: UN4212 or DTC124ESA Q15,16,19,20: 2SD1450(S,T) Q13,14: UN4112 or DTA124ESA Q10,11: 2SA1286-T11 Q8,9,17,18,32,33: UN5212 or DTC124EU

44、A Q4-7,12,26,27,36: 2SC2785(F,E) or 2SC2458(Y,GR) Q3,35: 2SD2525 Q1,2: 2SD2061 or 2SD2012 IC6: BA6209 IC5: BA328 IC4: BA3126N IC3: PST993D-T IC2: HA12167FB IC1: CXP84124-150Q REC-F HALF CrO2 REC-R CAPSTAN MOTOR MODE SW OPEN SW CLOSE SW MOTOR LOADING MECHANISM ASSY D40-1636-05 R/P/E HEAD (PCB) Lch Rc

45、h ERASE R/P HEAD DIGITAL LINE GND LINE SIGNAL LINE B LINE HEAD Rch Lch IC1 IC4 IC6 (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 NR B-type c-type direction reverse forward pausecrlsrev. mode 0V 0V 0V 13.0V 0

46、V 0V REC :5.1V PLAY :0V 1.4V 0.9V 5.6V 0.9V 9.0V 1.4V 5.5V METAL :10.0V HI :10.0V REC NOR :6.9V REC NOR :6.9V HI :10.0V METAL :10.0V HI,METAL :10.5V PLAY,STOP :0.3V REC,NOR :7.2V 0V 0V 13.0V 9.1V 9.1V 0V 5.1V 0V 0V 0V 0.6V 6.2V 1.2V 6.3V 1.9V 2.0V 6.3V 2.1V 6.4V 6.4V 1.7V 6.4V 1.2V 0V 6.4V 6.4V 6.4V

47、 6.4V 0V 6.5V 6.1V 6.9V 6.5V 7.0V 0V 6.5V 7.0V 0.3V 0V 0V 12.8V 0V 1.2V 1.2V 0.6V 0V 0V0V 1.3V 1.2V 1.2V 1.2V 1.2V 0V 0.2V 5.1V 0.2V 6.4V 0.2V 6.4V 2.1V 2.1V 6.4V 2.2V 6.5V 1.8V 6.6V 6.6V 0V 6.5V 6.5V 6.5V 0V 0.6V 0V 0.6V 5.1V 5.1V 0V 0V 5.0V 0V 0V 5.1V 5.1V 5.1V 4.8V 5.1V 0V 0V 5.1V 2.4V 2.4V 5.1V

48、0V 5.1V 5.1V 0V 1.7V 5.0V 5.1V 1.8V 0V 4.3V 3.5V 5.0V 4.1V 3.1V 4.1V 4.1V 4.2V4.2V4.2V3.2V 5.2V 2.0V 3.8V 0V 2.3V 2.1V 0.6V 4.9V 0.5V 12.2V 0.9V 0.9V 0V 0V 5.0V 0.5V 0V +B 1 2 3 4 5 6 7 1 2 3 4 5 CLOSE-SW OPEN-SW GND MOTOR-(CW) MOTOR+(CCW) 1 2 3 4 5 6 7 8 9 10 11 12 LED-5V 5V CON LED-RET KS0 KS1 KS3 KS2 KR2 KR0 KR1 LED G2 LED G0 LED G1 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15