Kenwood-CV751-int-sm 电路图 维修手册.pdf

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1、STEREO INTEGRATED AMPLIFIER/TUNER C-V751 SERVICE MANUAL 1999-8/B51-5566-00 (K/K) 1992 70% Caution : No connection of ground line if disassemble the unit. Please connect the ground line on rear panel, PCBs, Chassis and some others. ON/STANDBY PHONES INPUT TAPE 2 / MONITOR VOLUME CONTROL DOWNUP DIGITA

2、L REC TIMER MODE RDS PTYDISPLAY CLOCK TA/NEWS DTS A.MEMOAUTOBAND TUNING PTY SELECT LISTEN MODE MULTI.CONTROL LEVEL OPEN/CLOSE SET UPSOUNDINPUT MODE DIGITAL CIRCLE SURROUND TIMER SET ANTENNA AM FM 75 GND CONNECT WITH POWER AMPLIFIER UNSWITCHED SYSTEM CONTROL FRONTSURROUND CENTER PRE OUT SUB WOOFER L

3、R RECPLAY RECPLAY PLAYPLAY PLAY PLAY DVD/ 6CH.INPUT MONITOR OUT RECPLAYREC VIDEO 1VIDEO 2 VIDEO DIGITAL IN FRONTSURROUND CENTER SUB WOOFER CDMD/TAPE1TAPE 2/MON CD (OPTICAL 1) DVD (COAXAL) DVD/6CH.INPUT DIGITAL IN Panel (A60-1686-01) Front glass (B10-2351-14) Phone jack (E11-0280-05) Knob (K29-6665-0

4、2) Knob (K29-6666-12) Knob (K29-7591-02) Knob (K29-6665-02) Knob (K29-6660-04) Knob (K29-6665-02) Metallic cabinet (A01-3702-01) Lock terminal board (E70-0052-05) Phono jack (E63-0094-05) Phono jack (E63-0199-05) Power cord bushing (J42-0083-05) Rectangular receptacle (E58-0018-05) Phono jack (E63-1

5、084-05) Phono jack (E63-0136-15) Phono jack(6P)x2 (E63-0139-15) Phono jack (E63-1084-05)AC power cord * (E30-) AC outlet * (E03-) Phono jack (E63-0093-05) Optical receiving module (W02-1181-05) Miniature phone jack (E11-0293-05) * Refer to parts list on page 33. Indicator (B12-0311-04) Front glass (

6、B10-2350-14) RadioFans.CN 收音机爱 好者资料库 Batteries (R06/AA) (6) FM indoor antenna (1) (T90-0841-05) AM loop antenna (1) (T90-0833-05) Loop antenna stand (1) Remote control assy GRC-700 (1) (A70-1300-05) Battery cover(A09-1139-08) ENTER V O L U M E UP DOWN CONFIRM ON/STANDBYCONTRASTBacklight e d i t m o

7、v i e m u s i c s o u n d l i s t e n m o d e S l e e p C-V751 2 CONTENTS / ACCESSORIES DISASSEMBLY FOR REPAIR CONTENTS / ACCESSORIES . 2 DISASSEMBLY FOR REPAIR.2 CIRCUIT DESCRIPTION.3 ADJUSTMENT.7 WIRING DIAGRAM.8 PC BOARD . 9 SCHEMATIC DIAGRAM . 15 EXPLODED VIEW .32 PARTS LIST.33 PARTS DESCRIPTION

8、S .39 SPECIFICATIONS .Back cover Contents Accessories 1. Remove the 1 screw (1), Then pull the slider (2) till last 2. While raise the slider of left side, remove the slider from the bosses (3,4) 1 3 4 4 4 4 4 4 2 x2 x2 RadioFans.CN 收音机爱 好者资料库 C-V751 3 CIRCUIT DESCRIPTION DESTIN- ATION u-COM DESTINA

9、TION BAND RECEIVING FREQUENCY RANGE CHANNEL SPACE IFPLL TUNER SW TSW4 TSW3 TSW2 TSW1 (22) (21) (20) (19) E/X E3 RDS FM AM 87.5MHz108.0MHz 531kHz1602kHz 50kHz 9kHz +10.7MHz +450kHz 25kHz 9kHz 0101 T E4 LW RDS FM MW LW 87.5MHz108.0MHz 531kHz1602kHz 153kHz279kHz 50kHz 9kHz 9kHz +10.7MHz +450kHz +450kHz

10、 25kHz 9kHz 9kHz 0110 FREQUENCYFREQUENCY M.ch E/XT M.ch E/XT 1FM98.0MHzFM98.0MHz21AM531kHzLW270kHz 2FM87.5MHzFM87.5MHz22FM87.5MHzLW216kHz 3FM89.1MHzFM89.1MHz23FM87.5MHzLW162kHz 4FM 108.0MHzFM 108.0MHz24FM87.5MHzFM87.5MHz 5FM90.0MHzFM90.0MHz25FM87.5MHzFM87.5MHz 6FM87.5MHzFM87.5MHz26FM87.5MHzLW279kHz

11、7FM87.5MHzFM87.5MHz27FM87.5MHzLW270kHz 8FM87.5MHzAM1602kHz28FM87.5MHzLW216kHz 9AM1602kHzAM1440kHz29FM87.5MHzLW162kHz 10AM999kHzAM999kHz30FM 106.0MHzLW153kHz 11AM630kHzLW216kHz31FM87.5MHzFM87.5MHz 12AM1440kHzAM630kHz32FM87.5MHzFM87.5MHz 13FM 106.0MHzFM 106.0MHz33FM87.5MHzFM87.5MHz 14AM531kHzAM531kHz3

12、4FM87.5MHzLW279kHz 15FM87.5MHzFM87.5MHz35FM87.5MHzLW270kHz 16FM98.0MHzFM98.0MHz36FM87.5MHzLW216kHz 17FM98.5MHzFM98.5MHz37FM87.5MHzLW162kHz 18FM87.5MHzAM531kHz38FM87.5MHzFM 108.0MHz 19AM990kHzAM990kHz39FM 108.0MHzAM999kHz 20FM97.7MHzLW279kHz40AM999kHzLW216kHz 1. Conditions according to the destinatio

13、n TUNER destination table 2. Contents of tuner preset memory Sub-clock oscillation diagnosis function The oscillation diagnosis(existence oscillation and measurement of peri- od) of a sub-clock is performed before the test mode is entered. If the diagnosis result is OK, the system is entered the tes

14、t mode. If the diagnosis result is NG, the oscillation of the sub- clock diagnosed again. If the result is OK, the system enters the test mode. If the diagnosis result is continuous- ly NG 5 times, the system stops with ERR1 and ERR2 displayed. 3-5 Tuner test mode (When selector is set to TUNER.) P.

15、CALL of preset channel. S level indication. Set the TUNER ATT to ON/OFF and display the S level in hexadecimal when the PTY key is pressed. Indication of FL for TA NEWS and TIMER. 3-6 AMP test mode (When the selector is set to positions other then TUNER.) During the test mode, it can be operated in

16、a special manner that is different from an ordinary operation by using the keys on the remote control or the main body, specifically as shown in the following table. KEYSFUNCTION or FL INDICATIONREMARKS AUTOOne touch settings. Volume value. Volume value. A.MEMO Sub mute ON/OFF operation and FL indic

17、ation.(except for stereo mode) TIMER MODEOne touch settings. KEYFL INDICATION TA/NEWS DISPLAY KEYSOPERATION TIMER SET Increments the P. CALL every time this key is pressed. TIMER MODE Decrements the P. CALL every time this key is pressed. KEYOPERATION DIGITAL REC Selects the P.CALL steps cyclically.

18、 10 20 30 40 01 3. Test mode 3-1 Entering the test mode Turn on the power while pressing the OPEN/CLOSE key. The test mode gets started while the power is turned on after that,all the FLs will light up and the panel opens. Sub-clock oscillation diagnosis function is entered by pressing the DIGITAL R

19、EC MODE key in the all FL light- ing mode. 3-2 Canceling the test mode The system is initialized and the test mode is canceled when the AC power is turned off. 3-3 Initializing The system is initialized when the power is turned on while pressing the ON STANDBY key. 3-4 Contents of the test mode Key

20、operation in all FL lighting mode. All FL lighting off mode. KEYSOPERATION All FL lighting off. Normal indication. KEYSOPERATION AUTOGreen LED lights on. A.MEMORed LED lights on. Selection of P. CALL steps. RadioFans.CN 收音机爱 好者资料库 C-V751 4 CIRCUIT DESCRIPTION Pin No.Pin NameI/ODescription ACTIVE HL

21、1AMUTEOAudio muting control.Mute:ONMute:OFF 2POWEROPower ON/OFF relay control.Power:ONPower:OFF 3POWEROPower amplifier relay control.Power:ONPower:OFF 4F RLYOFront speaker relay control.Relay:ONRelay:OFF 5C RLYORelay control of center,surround and SW woofer.Relay:ONRelay:OFF 6S RLYORear speaker rela

22、y control.Mute:ONMute:OFF 7+3dBO+3dB attenuation control for super woofer.ATT:ONATT:OFF 820dBO+20dB attenuation control for volume control.20dB gain 9PROTECTIONIDetection terminal of protection signal.PRT:ON 10S DATAI/OSerial communication data signal. 11S BUSYI/OSerial communication busy signal. 12

23、T MUTEOMuting control of audio signal for tuner.Mute:ONMute:OFF 13PLL CLKOClock output of PLL IC for tuner. 14PLL DATAOData output of PLL IC for tuner. 15PLL CEOChip enable of PLL IC for tuner. 16PLL DOIData input from PLL IC. 17SDISyntony signal input of tuner. 18STEREOIStereo signal input. 1922T S

24、W14IDiscrimination of the tuner destination. 23M OPENOControl terminal of motor driver.(Motor CW Door open) 24M CLOSEOControl terminal of motor driver.(Motor CCW Door close) 25OPEN SWIDetection port of door open/close switch.Open 26CLOSE SWIDetection port of door open/close switch.Close 27DIG. HOPor

25、t for digital input. 28RWRIReading of interactive remote control data. H:End of reading data. 29ENBIPermission of transmission .Permission 30REQORequest of transmission.No Request 3138R DATA18OData output to remote control microprocessor. 39CEIChip enable. 40RSTIReset signal input. 41VSS-Ground. 42X

26、TAL-16MHz main oscillator. 43EXTALI16MHz main oscillator. 44SEL STB2OUnused. 45SEL STB1OStrobe output to selector IC. 46SELCLKOClock output to selector IC. 47SEL DTOData output to selector IC. 4850VIDEO13OControl port for video selector. 51DSP RST2OReset signal output to DSP. 52AVSS-Ground. 53AVREF-

27、Connected to VCC. 54AVDD-Power supply(+5.0V). 55VOL CLKOClock output to electric volume(IC28). 56VOL DATAOData output to electric volume(IC28). 57VOL LATCHOLatch output to electric volume(IC28). 58CODEC RSTOReset port to A/D,D/A converter. 59-Unused. 60RDS SLEVELISignal level input from RDS decoder.

28、 61DOOR KEYIDetection port of door key(S16) . 62POW KEYIDetection port of power key(S3). 63OESLOSwitching the output enable. 64AUDIOIDetection port of audio. 4. Microprocessor: CXP740010-107Q(X08,IC16) 4-1 Port description of microprocessor 5 C-V751 CIRCUIT DESCRIPTION KS1(15pin)KS2(16pin)KS3(17pin)

29、KS4(18pin)KS5(19pin)KS6(20pin)KS7(21pin) TAPE2 MONITOR INPUT AUTO- *TA/NEWS/ INFO. SRS- - INPUT BAND LEVEL *PTYDTS- TIMER MODE TIMER SET AUTO MEMORY LEVEL *DISPLAYDOLBY.D INPUT MODE TUNINGTUNING D.RECMODESET UP TIMER CLOCK SOUND Pin No.Pin NameI/ODescription ACTIVE HL 65ERRIDetection port of error.E

30、RROR 66AC3IDetection port of dolby digital. 67FREQ1IDetection port 1 of sampling frequency. 68FREQ0IDetection port 0 of sampling frequency. 69CODEC DINIData input. 70ABQOT2I/OABOOT output/INTREQ input port. 71ABQOT SEL1OSwitching the power supply of ABOOT/INTREQ(IC6). 72ABQOT SEL2OSwitching the powe

31、r supply of ABOOT/INTREQ(IC5). 73DSP CSOCS output to IC33. 74ADD1OExternal ROM(IC2) address1. 75CODEC CSOCS output to IC15. 76DSP RST1OReset output to DSP(IC6). 77RDS DATAIData input from RDS decoder. 78RDS CLKIClock input from RDS decoder. 79DSP D1IData input from IC15. 80DSP DOOData output to IC6.

32、 81DSP/CO CLKOClock output to IC15 and IC6. 82ABOOT1I/OABOOT output/INTREQ input port. 83HP. DETECTIDetection port of headphones.H/P ON 84HP. MUTEOMuting control of audio signal for headphones.Mute OFFMute ON 85REMOCONIInput port of remote control signal. 86TEXISub clock(32.768kHz) input. 87TXISub c

33、lock(32.768kHz) input. 88VSS-Ground. 89VDD-Power supply(+5.0V). 90NC-Unused. 91ADD2OExternal ROM(IC2) address2. 92ADD3OExternal ROM(IC2) address3. 93LED ROStandby LED (red) control. 94LED GOStandby LED (green) control. 95ENC CCWIPulse input from volume encoder. 96ENC CWIPulse input from volume encod

34、er. 97FL DIOData output to FL driver. 98FL DOIData input from FL driver. 99FL CLKOClock output to FL driver. 100FL STBOStrobe output to FL driver. 4-2 Key matrix The numbers shown in ( ) are port number of FL driver(X14,IC1). ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

35、? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

36、? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

37、? ? ? ? 6 C-V751 CIRCUIT DESCRIPTION INPUT S1 L/R VIDEO1 REC S2 L/R VIDEO2 REC S3 L/R MD TAPE1 S4 L/R INPUT -6dB S5 L/R INPUT 0dB S6 L/R INPUT -3dB S7 L/R TAPE2 ON S8 L/R TAPE2 OFF TUNER CD MD/TAPE1X DVD/DVD6ch VIDEO1X VIDEO2X INPUT LEVEL 0dB XX INPUT LEVEL -3dB XX INPUT LEVEL -6dB XX TAPE2/MONI ON

38、X TAPE2/MONI OFF X INPUT S1 L R S2 L R S3 L R S4 L R S5 L R S6 L R S7 L R S8 L R TUNERXXXXXXXXXXX CDXXXXXXXXXX MD/TAPE1XXXXXXXXXX DVD/DVD6chXXXXXXXXXXX VIDEO1XXXXXXXXXX VIDEO2XXXXXXXXXX REC MODEXXXXXXXXXXX Pin No. Pin NameI/ODescription 14SW1SW4IUnused. 5FIP DOUTOData output to FL driver. 6FIP DINID

39、ata input from FL driver. 7NC-Unused. 8FIP CLKIClock input from FL driver. 9FIP STBIStrobe input from FL driver. 1013 KEY1KEY4IKey return 14. 14VDD-Power supply(+5V). 15KS1/P17OKey scan 1 and FL segment17. 16KS2/P16OKey scan 2 and FL segment16. 17KS3/P15OKey scan 3 and FL segment15. 18KS4/P14OKey sc

40、an 4 and FL segment14. 19KS5/P13OKey scan 5 and FL segment13. 20KS6/P12OKey scan 6 and FL segment12. 21KS7/P11OKey scan 7 and FL segment11. 2231P10P1OFL segment10 to1. 32G11OFL grid output 11. 33VDD-Power supply(+5V). 34VEE-Power supply(-30V). 3544G10G1OFL grid output10 to 1. 45VDD-Power supply(+5V)

41、. 46NC-Unused. 47LED4OControl port of door LED. 48LED 3OControl port of SRS LED. 49LED 2OControl port of DTS LED. 50LED 1OControl port of dolby.D LED. 51VSS-Ground. 52OSC-Unused. 5. FL driver: UPD16311(X14,IC1) 5-1 Port description of FL driver 6. Switching controller IC 6-1 Control table of selecto

42、r IC 6-1-1 Audio selector IC(X11,IC4) 6-1-2 Audio selector IC(X11,IC5) INPUT S1 L/R S2 L/R S3 L/R S4 L/R S5 L/R S6 L/R S7 L R DVD/DVD6chXXX ANALOG 2chXXXX DIGITALXXX SW OUT ON SW OUT OFF 6-1-3 Audio selector IC(X08,IC25) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?