Kenwood-CV751-int-sm 维修电路原理图.pdf

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1、STEREO INTEGRATED AMPLIFIER/TUNERC-V751SERVICE MANUAL 1999-8/B51-5566-00 (K/K) 199270%Caution : No connection of ground line if disassemble the unit.Please connect the ground line on rear panel, PCBs, Chassis and someothers.ON/STANDBYPHONESINPUTTAPE 2/ MONITORVOLUME CONTROLDOWNUPDIGITALRECTIMERMODER

2、DSPTYDISPLAYCLOCKTA/NEWSDTSA.MEMOAUTOBANDTUNINGPTY SELECTLISTENMODEMULTI.CONTROLLEVELOPEN/CLOSESET UPSOUNDINPUT MODEDIGITALCIRCLESURROUNDTIMERSETANTENNAAMFM 75GNDCONNECTWITHPOWER AMPLIFIERUNSWITCHEDSYSTEMCONTROLFRONTSURROUND CENTERPRE OUTSUB WOOFERLRRECPLAYRECPLAYPLAYPLAYPLAYPLAYDVD/6CH.INPUTMONITOR

3、OUTRECPLAYRECVIDEO 1VIDEO 2VIDEODIGITAL INFRONTSURROUND CENTERSUB WOOFERCDMD/TAPE1TAPE 2/MONCD(OPTICAL 1)DVD(COAXAL)DVD/6CH.INPUTDIGITAL INPanel(A60-1686-01)Front glass(B10-2351-14)Phone jack(E11-0280-05)Knob(K29-6665-02)Knob(K29-6666-12)Knob(K29-7591-02)Knob(K29-6665-02)Knob(K29-6660-04)Knob(K29-66

4、65-02)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(E63-1084-05)Phono jack(E63-0136-15)Phono jack(6P)x2(E63-0139-15)Phono jack(E63-1084-05)AC power cord *(E30-)AC

5、 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(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)L

6、oop antenna stand (1)Remote control assyGRC-700 (1)(A70-1300-05)Battery cover(A09-1139-08)ENTERVOLUMEUPDOWNCONFIRMON/STANDBYCONTRASTBacklighteditmoviemusicsoundlistenmodeSleepC-V7512CONTENTS / ACCESSORIESDISASSEMBLY FOR REPAIRCONTENTS / ACCESSORIES . 2DISASSEMBLY FOR REPAIR.2CIRCUIT DESCRIPTION.3ADJ

7、USTMENT.7WIRING DIAGRAM.8PC BOARD . 9SCHEMATIC DIAGRAM . 15EXPLODED VIEW .32PARTS LIST.33PARTS DESCRIPTIONS .39SPECIFICATIONS .Back coverContentsAccessories1. Remove the 1 screw (1), Then pull the slider (2) till last2. While raise the slider of left side, remove the slider fromthe bosses (3,4)13444

8、4442x2x2RadioFans.CN 收音机爱 好者资料库C-V7513CIRCUIT DESCRIPTIONDESTIN-ATIONu-COMDESTINATIONBANDRECEIVINGFREQUENCYRANGECHANNELSPACEIFPLLTUNER SWTSW4 TSW3 TSW2 TSW1(22) (21) (20) (19)E/XE3RDSFMAM87.5MHz108.0MHz531kHz1602kHz50kHz9kHz+10.7MHz+450kHz25kHz9kHz0101TE4LWRDSFMMWLW87.5MHz108.0MHz531kHz1602kHz153kHz

9、279kHz50kHz9kHz9kHz+10.7MHz+450kHz+450kHz25kHz9kHz9kHz0110FREQUENCYFREQUENCYM.chE/XTM.chE/XT1FM98.0MHzFM98.0MHz21AM531kHzLW270kHz2FM87.5MHzFM87.5MHz22FM87.5MHzLW216kHz3FM89.1MHzFM89.1MHz23FM87.5MHzLW162kHz4FM 108.0MHzFM 108.0MHz24FM87.5MHzFM87.5MHz5FM90.0MHzFM90.0MHz25FM87.5MHzFM87.5MHz6FM87.5MHzFM8

10、7.5MHz26FM87.5MHzLW279kHz7FM87.5MHzFM87.5MHz27FM87.5MHzLW270kHz8FM87.5MHzAM1602kHz28FM87.5MHzLW216kHz9AM1602kHzAM1440kHz29FM87.5MHzLW162kHz10AM999kHzAM999kHz30FM 106.0MHzLW153kHz11AM630kHzLW216kHz31FM87.5MHzFM87.5MHz12AM1440kHzAM630kHz32FM87.5MHzFM87.5MHz13FM 106.0MHzFM 106.0MHz33FM87.5MHzFM87.5MHz1

11、4AM531kHzAM531kHz34FM87.5MHzLW279kHz15FM87.5MHzFM87.5MHz35FM87.5MHzLW270kHz16FM98.0MHzFM98.0MHz36FM87.5MHzLW216kHz17FM98.5MHzFM98.5MHz37FM87.5MHzLW162kHz18FM87.5MHzAM531kHz38FM87.5MHzFM 108.0MHz19AM990kHzAM990kHz39FM 108.0MHzAM999kHz20FM97.7MHzLW279kHz40AM999kHzLW216kHz1. Conditions according to the

12、 destination TUNER destination table2. Contents of tuner preset memory Sub-clock oscillation diagnosis function The oscillationdiagnosis(existence oscillation and measurement of peri-od) of a sub-clock is performed before the test mode isentered. If the diagnosis result is OK, the system isentered t

13、he test mode.If the diagnosis result is NG, the oscillation of the sub-clock diagnosed again. If the result is OK, the systementers the test mode. If the diagnosis result is continuous-ly NG 5 times, the system stops with ERR1 and ERR2displayed.3-5 Tuner test mode(When selector is set to TUNER.) P.C

14、ALL of preset channel. S level indication.Set the TUNER ATT to ON/OFF and display the S level inhexadecimal 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 a spec

15、ialmanner that is different from an ordinary operation byusing the keys on the remote control or the main body,specifically as shown in the following table.KEYSFUNCTION or FL INDICATIONREMARKSAUTOOne touch settings.Volume value.Volume value.A.MEMOSub mute ON/OFF operationand FL indication.(except fo

16、rstereo mode)TIMER MODEOne touch settings.KEYFL INDICATIONTA/NEWSDISPLAYKEYSOPERATIONTIMER SETIncrements the P. CALL every timethis key is pressed.TIMER MODEDecrements the P. CALL every timethis key is pressed.KEYOPERATIONDIGITAL RECSelects the P.CALL steps cyclically.10 20 30 40 013. Test mode3-1 E

17、ntering the test mode Turn on the power while pressing the OPEN/CLOSE key. The test mode gets started while the power is turned onafter that,all the FLs will light up and the panel opens. Sub-clock oscillation diagnosis function is entered bypressing the DIGITAL REC MODE key in the all FL light-ing

18、mode.3-2 Canceling the test modeThe system is initialized and the test mode is canceledwhen the AC power is turned off. 3-3 InitializingThe system is initialized when the power is turned onwhile pressing the ON STANDBY key.3-4 Contents of the test mode Key operation in all FL lighting mode. All FL l

19、ighting off mode.KEYSOPERATIONAll FL lighting off.Normal indication.KEYSOPERATIONAUTOGreen LED lights on.A.MEMORed LED lights on. Selection of P. CALL steps.C-V7514CIRCUIT DESCRIPTIONPin No.Pin NameI/ODescriptionACTIVEHL1AMUTEOAudio muting control.Mute:ONMute:OFF2POWEROPower ON/OFF relay control.Pow

20、er:ONPower:OFF3POWEROPower amplifier relay control.Power:ONPower:OFF4F RLYOFront speaker relay control.Relay:ONRelay:OFF5C RLYORelay control of center,surround and SW woofer.Relay:ONRelay:OFF6S RLYORear speaker relay control.Mute:ONMute:OFF7+3dBO+3dB attenuation control for super woofer.ATT:ONATT:OF

21、F820dBO+20dB attenuation control for volume control.20dB gain9PROTECTIONIDetection terminal of protection signal.PRT:ON10S DATAI/OSerial communication data signal.11S BUSYI/OSerial communication busy signal.12T MUTEOMuting control of audio signal for tuner.Mute:ONMute:OFF13PLL CLKOClock output of PL

22、L 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 SW14IDiscrimination of the tuner destination.23M OPENOControl terminal of motor driver.(Motor CW Do

23、or open)24M CLOSEOControl terminal of motor driver.(Motor CCW Door close)25OPEN SWIDetection port of door open/close switch.Open26CLOSE SWIDetection port of door open/close switch.Close27DIG. HOPort for digital input.28RWRIReading of interactive remote control data.H:End of reading data.29ENBIPermis

24、sion of transmission .Permission30REQORequest of transmission.No Request3138R DATA18OData output to remote control microprocessor.39CEIChip enable.40RSTIReset signal input. 41VSS-Ground.42XTAL-16MHz main oscillator.43EXTALI16MHz main oscillator.44SEL STB2OUnused.45SEL STB1OStrobe output to selector

25、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-Connected to VCC.54AVDD-Power supply(+5.0V).55VOL CLKOClock output to electric volume(IC28).56VOL DATAOData output to el

26、ectric 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.61DOOR KEYIDetection port of door key(S16) .62POW KEYIDetection port of power key(S3).63OESLOSwitching the output enable.64AUDI

27、OIDetection port of audio.4. Microprocessor: CXP740010-107Q(X08,IC16)4-1 Port description of microprocessor5C-V751CIRCUIT DESCRIPTIONKS1(15pin)KS2(16pin)KS3(17pin)KS4(18pin)KS5(19pin)KS6(20pin)KS7(21pin)TAPE2MONITORINPUTAUTO-*TA/NEWS/INFO.SRS-INPUTBANDLEVEL*PTYDTS-TIMERMODETIMERSETAUTOMEMORYLEVEL*DI

28、SPLAYDOLBY.DINPUTMODETUNINGTUNINGD.RECMODESET UPTIMERCLOCKSOUNDPin No.Pin NameI/ODescriptionACTIVEHL65ERRIDetection port of error.ERROR66AC3IDetection port of dolby digital.67FREQ1IDetection port 1 of sampling frequency.68FREQ0IDetection port 0 of sampling frequency.69CODEC DINIData input.70ABQOT2I/

29、OABOOT output/INTREQ input port.71ABQOT SEL1OSwitching the power supply of ABOOT/INTREQ(IC6).72ABQOT SEL2OSwitching the power 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 inpu

30、t from RDS decoder.78RDS CLKIClock input from RDS decoder.79DSP D1IData input from IC15.80DSP DOOData output to IC6.81DSP/CO CLKOClock output to IC15 and IC6.82ABOOT1I/OABOOT output/INTREQ input port.83HP. DETECTIDetection port of headphones.H/P ON84HP. MUTEOMuting control of audio signal for headph

31、ones.Mute OFFMute ON85REMOCONIInput port of remote control signal.86TEXISub clock(32.768kHz) input.87TXISub clock(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

32、LED (green) control.95ENC CCWIPulse input from volume encoder.96ENC CWIPulse input from volume encoder.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 matrixThe numbers shown in ( ) are port number of

33、FL driver(X14,IC1). ?6C-V751CIRCUIT DESCRIPTIONINPUTS1 L/RVIDEO1RECS2 L/RVIDEO2RECS3 L/RMDTAPE1S4 L/RINPUT-6dBS5 L/RINPUT0dBS6 L/RINPUT-3dBS7 L/RTAPE2ONS8 L/RTAPE2OFFTUNERCDMD/TAPE1XDVD/DVD6chVIDEO1XVIDEO2XINPUT LEVEL0dBXXINPUT LEVEL-3dBXXINPUT LEVEL-6dBXXTAPE2/MONIONXTAPE2/MONIOFFXINPUTS1L RS2L RS3

34、L RS4L RS5L RS6L RS7L RS8L RTUNERXXXXXXXXXXXCDXXXXXXXXXXMD/TAPE1XXXXXXXXXXDVD/DVD6chXXXXXXXXXXXVIDEO1XXXXXXXXXXVIDEO2XXXXXXXXXXREC MODEXXXXXXXXXXXPin No. Pin NameI/ODescription14SW1SW4IUnused.5FIP DOUTOData output to FL driver.6FIP DINIData input from FL driver.7NC-Unused.8FIP CLKIClock input from F

35、L 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 scan 4 and FL segment14.19KS5/P13OKey scan 5 and FL segment13.20KS6/P12OKe

36、y 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).46NC-Unused.47LED4OControl port of door LED.48LED 3OControl port of SRS LED.49LE

37、D 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 driver6. Switching controller IC6-1 Control table of selector IC6-1-1 Audio selector IC(X11,IC4)6-1-2 Audio selector IC(X11,IC5)INPUTS1L/RS2L/RS3L/RS4L/

38、RS5L/RS6L/RS7L RDVD/DVD6chXXXANALOG 2chXXXXDIGITALXXXSW OUT ONSW OUT OFF6-1-3 Audio selector IC(X08,IC25)?7C-V751ADJUSTMENTNo.ITEMINPUTSETTING OUTPUTSETTINGTUNER/AMP SETTINGALIGNMENTPOINTSALIGN FORFIG.SELECTOR : FM1DISCRIMINATORDISTORTION(A)98.0MHz MONO1kHz, 40kHz dev 60dBu (ANT INPUT)Connect a DC v

39、oltmeter to CN2 on tunerPCB.MONO98.0MHzL31 (T)L4(E,X)0V(a)TUNED LEVEL(E,X type only)(C)98.0MHz MONO1kHz, 40kHz dev 20dBu ANT INPUTMONO98.0MHzVR1Adjust VR1and stop atthe point where FL(TUNED)goes ON.(a)(B)-L32 (T)L5(E,X)Minimum distrotion32DISTORTION (STEREO)(C)98.0MHz STEREO1kHz, 40kHz devpilot: 6kH

40、z dev 60dBu (ANT INPUT)(B)AUTO (98.0MHz)IFT (front end)Mininum distrotion(a)ANTENNAAMFM 75GNDCONNECTWITHPOWER AMPLIFIERUNSWITCHEDSYSTEMCONTROLFRONTSURROUND CENTERPRE OUTSUB WOOFERLRRECPLAYRECPLAYPLAYPLAYPLAYPLAYDVD/6CH.INPUTMONITOROUTRECPLAYRECVIDEO 1VIDEO 2VIDEODIGITAL INFRONTSURROUND CENTERSUB WOO

41、FERCDMD/TAPE1TAPE 2/MONCD(OPTICAL 1)DVD(COAXAL)DVD/6CH.INPUTDIGITAL INOscilloscopeDistortion meterAC voltmeterDummy antenna(B)(A)(C)(D)AGAGFM SGMPXAGFM SGAM SG(a)?PLAYJ1VIDEO1J3J2J7J7J7J4RchLchJ5PRE OUT12Lch1Rch2Lch5Rch6Lch1Rch2Lch3Rch4Lch5Rch6Lch1Rch2LSch3RSch4Cch5SWch6Lch1Rch23456Rch43LchRchLch43R

42、ECVIDEO1PLAYCDPLAYVIDEO2MD/TAPE1RECMD/TAPE1PLAYTAPE2/MONITORDVD/6chINPUTSWchCchRSchLSchJ6CONNECT WITHPOWER AMPLIFIRECN1E3WH3E4HEADPHONESJ8CN13CN6CN5CN12E2WH4E1J3SYSTEMJ2MONITOROUTRECVIDEO1VIDEO1 INVIDEO2 IN6ch IN21CONTROLJ4J1DVDCOAXIAL INA1CN1WH1E1WH2CN1CN2CN3CN1CN2CN4CN4WH2E2CN3WH1E1J1FM75GNDAM ANT

43、FFCFFCFFCFFCRECTAPE2/MONITORPLAYOPTICALIN CDTRANSFORMERPOWERABB.TXEABB.TXEAUSTRALIAEUROPEU.K.(X11-386X-XX)(X08-299X-XX)COUNTRYDESTINATIONEUROPEAUSTRALIAU.K.COUNTRYDESTINATION2-700-51UNIT No.2-700-510-71UNIT No.WW211414P11311311271279191151511151511125125127127151011106611F1F5F4F3(WHT)WH1WH2(RED)2727

44、3131252527271061515L07-2741-5 (230V)L07-2765-5 (240V)(X)(T,E): AC240V 50Hz: AC230V 50HzUSED (E) TYPEUSED (T) TYPEUSED (X) TYPE(X11- ) (B/4)(X11-386X-XX) (A/4)(X08-299X-XX)(X14-7022-70) (A/4)(X05-5082-70) : (E,X) TYPE(E,X) TYPE ONLY(T) TYPE ONLYMAIN VR(X14- ) (B/4)POWER SW (TACT)(X14- ) (C/4)FL(X14-

45、) (D/4)DOOR MECHA(X11- ) (D/4)(C/4)(X11- )C-V751(X05-4680-51) : (T) TYPE(D40-1555-02)C-V7518WIRING DIAGRAM?9ACEBD2135746Refer to the schematic diagram for the value of resistors and capacitors.PC BOARD(Component side view)Q2Q1D1Q11Q10IC3D7D16D13D11Q9Q8Q12Q6Q3Q4D8Q14Q15Q7R75C84C92C93C88R89C91C89C90C3

46、5C87R32/W60R29C8C58C56C57C61C60C36R43R48R66R63R62R69R67R68R18R19R34R33R20C69C63W85W59W81W86C81C5R84C6C1C2C3C82C78C75C11C12C39C25C26C24C42C41C30C22C52C45C47C50C51C18C20C43C44R55R79R56R53R54R57R51R52R49R42R80R82R11R14W56R12R15R16R17R10R4R1R5R8R9R6R7R35R39R38R23R28R25R76W83R74R78R47W84R45R46W61R27C31C7

47、6C79W51R31R36W55R83C77W62R64R65R60R59R58W52R30C80R72C71R73C70C34C33W82C64R37W80W54R88R85C86C85R86R87C74C40/R90E BEBE BE BE BEBEBEBE BE BEBEBEB18169E1ANTENNACN1D6A1IC1D4D3D9D5IC2CN2J1X05-5082-70 (J70-1353-01)S1ONOFFW5W6W7W4W19W22W21W20W14W17W10W1W3AM RF(G)(W)MPX.FIL.FMTUNEDFM DET MPXAM STEREOFM IFPLL

48、VTC17W24C28C38C29C37W9W16VR1CF1CF2C10W13W23CF3L9L2R50R44R71C49C46C72C32C14C15C67C68C55W25L3C62C66C65W2W8W11W15L1C73C7R81C27C16C19C21C23L6L7L5C48R41L4R70R40R77R61C54C59C53R2X2X115111516301211112228110FGIHJ2135746PC BOARD(Component side view)1011061TAPE2INPUTPOWERT.CLOCKT.MODET.SETD.RECSETUPDISPPTYTA/

49、NEWS/INFOSOUNDMODEINPUT61GND+5VVOLUME CONTROLDOORR1R16R12R13R14W36W37W35W11W7W14W4W20W31W27W26W30W28W29W25W24W5W3W12W34W10W23W22W9W2W8W6W18W21W16W19125AUTOA.MEMODOLBY.DSRSBANDMODELEVELCONTTUNINGR11C1R15W32R32R31R34R2R35R3R5R4W38W13R25R24C2R29R28R91R21R94R93R92W41C4R52R51R69C5C3R76R70R71R72R73R74C9C1

50、2R62R61R60C11R75C8C10R59C6R54R58R56C7R68R67R66R65R57R55W39R79R80R81R85W40R53C21BE52BEEB1319229271226dtsBEEB52EB224W17152131426273940511Q1Q6CN4WH2WH1D14S8S3S4S7Q4Q3A1D1D4S14S13S15S1S5D2D3S12S9S11S10S21S22S18S20S19S26S17S23S24S2D6D5D8D10D9D7S25Q2E3D22D13S16S27D11D12D23D16D17D18D19D20D21D15Q5WH3S6ED1E2