Kenwood-XSG7-tape-sm 维修电路原理图.pdf

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1、STEREO AUTO REVERSE CASSETTE DECKX-SG7/SG7GSERVICE MANUAL 1999-6/B51-5546-00 (K/K) 229970%SYSTEMCONTROLRECINPLAYOUTLRPhono jack(E63-0046-15)Metallic cabinet(A01-3360-01)Rectangular receptacle(E08-0311-05)Power cord bushing(J42-0083-05)AC power cord *(E30-)Refer to X-E9 and X-SA7 service manuals (B51

2、-4926-00/B51-5214-00),if you require in detail.rev. modeDolby NRCRLSBC?10273?8”?stereo auto reverse cassette deckon/standby front loading mechanism Panel *(A29-)Panel *(A60-)Knob(K29-6741-04)Indicator(B12-0319-13)Knob(K29-7572-13)* Refer to parts list on page13.RadioFans.CN 收音机爱 好者资料库X-SG7/SG7G2ACCE

3、SSORIES LEDITEMPOWERDOLBY BDOLBY CRVSMODEUNDER ADJUSTMENTPB CALIBERRLRPB LEVELERRLRREC CALIBERRLRREC LEBELERRLRBIAS DACERRLRPB ALL OK ALL OKDISASSEMBLY FOR REPAIRCIRCUIT DESCRIPTION Power does not turn on and tray does not come out.1. Turn the pully in the direction of the arrow in the draw-ing with

4、 a finger (1).2. If the tray comes out to the front side, pull out the trayby hand forward the front (2).Audio cord (2)(E30-0615-05)System control cord (1)(E30-2628-05)8 Correction of circuit descriptionLED indication state.Operation to resetThe microcomputer may fall into malfunction(impossibility

5、to operate, erroneous display,etc.) when the power cord is unplugged whilepower is ON or due to an external factor. In thiscase, execute the following procedure to resetthe microcomputer and return it to normal con-dition.Unplug the power cord from the power out-let and, while holding the stop key d

6、e-pressed, plug the power cord again.?Please note that resetting the microcomputerclears the contents stored in it returns it to con-dition when it left the factory.RadioFans.CN 收音机爱 好者资料库X-SG7/SG7GADJUSTMENT3AC voltmeterAC voltmeterOscilloscopeDistortion meterAGSYSTEMCONTROLRECINPLAYOUTLRKSJ-0816Or

7、derItemInputsettingOutput settingDecksettingAdjustment pointsAdjustment methodFig.Unless otherwise specified, set the respective switches as follow : TAPE : NORMAL DOLBY : OFF INPUT : REC IN OUTPUT : PLAY OUT I. Cassette mechanism section (Recording/play head adjustment)Demagnetization and cleaningP

8、ower : OFF Demagnetization, cleaning, PLAYRecording head, erase head, capstan, pinch rollerDemagnetize the REC/PLAY head with the head eraser. Clean the REC/PLAY head, erase head, capstan and pinch roller using a cotton swab slightly damped with alcohol.Azimuth of the REC/PLAY headTCC-153 MTT-114 10

9、KHz, -10dBLINE OUT(Lch or Rch)PLAYAdjust 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.II. Printed circuit board adjustment (X28-297)(1)Tape speed (normal)TCC-110MTT-1113KHz (A)PLAYMOTOR VR.

10、Adjust so ; that the frequency is 3KHz at the tape center.(2)Playback levelTCC-130400 Hz(A) MANUAL ADJUSTMENT MODE PLAYADJUSTMENT VALUEUP : DOLBY KEY DOWN : RVS PLAY KEYCHANGE OF ADJUSTMENT MODE CRLS KEYOutput level : -1dBs(3)Bias current TCC-108A 12.5KHz, -21dBm(A)MANUAL TEST MODE REC and PLAY-21dB

11、m(4)Recording levelTCC-108A 400Hz, -21dBm(A) MANUAL TEST MODE REC and PLAY-21dBmRVSFWD The method of the manual adjust-ment mode.(1) SettingShorting the TEST pin of (X28-)(A/5) TP5 w TP4 with thediode, plug the power cord to theAC wall let.(2) Refer to manual adjustmentmode(3-3), if require moredeta

12、ils.(A) Measurement Equipment ConnectionGACEGIBDFHJ2135746EB16441248065402511101613BE131101391111111210110155121810BEBBBBBEBEEEEE19EEBB151101IBEBEBEGOREC INPLAYOUTSYSTEMCONTROLACOUTLETEBEBEBEEBEEBBBBEBEBEBEE BEBEBEBEBE BE BEBEEEEBBBBRefer to the schematic diagram for the value of resistors and capac

13、itors.PC BOARD (Component side view)45LMNOABDFHCEGIJK2135746REC: 5.0VOTHER: 0VPLAY,REC,REC PAUSE: 5.0VOTHER: 0V5.1V5.1V4.7V4.8V5.1V11.3V0.6V5.7V6.1V12.3V12.9V4.7V5.1V0V4.8V0V0V0.6V1.3V1.3V3.2V3.5V1.3V1.3V1.3V1.3V1.3V1.3VNORMAL:2.0VMETAL/CRO2:3.3VSTOP:4.4VPLAY/REC:0VREC: 0VOTHER: 4.3V1.2V6.4VREC:0V6.

14、4V6.5V1.7V1.7V6.5V6.5V6.5V6.5V6.3V12.9V6.5V6.2V6.4V7.0V7.0V6.2V6.2V7.0V6.4V6.5V6.5V6.5V6.5V6.5V1.7V1.7V6.5V6.4VREC:0V6.4VDOLBY OFF:0VDOLBY ON:5.0VDOLBY B:0VDOLBY C:5.0VPLAY:0VREC:5.0VOTHER:4.3VREC:0VCRO2/METAL:5.0VNORMAL:0V25.8V5.1V12.6V12.9VREC:4.8VREC:0V7.9V7.3V12.9V9.8V3.7V1.3V0.7V3.7V0.7V1.3VPLA

15、Y:12.9VREC:0VPLAY:0VREC:5.0VREC:4.4VPLAY:0V0.5V0.8V7.3V0.6V0.5V0.8V12.3V12.3V5.0V11.6V12.2VPIN123456789181716151413111210PINNORMALCRO2METALMETALCRO2NORMAL1.9V4.4V3.2V4.4V2.4V1.9V2.6V4.1V3.2V3.6V12.9V0V12.9V1.8V2.9V4.38V2.3V3.4V1.7V2.9V2.64V4.1V12.9V1.69VMODE:RECORDINGIC8 VOLTAGE7.0V10u16C229+C239 1u

16、50+22u16C209+C21022u16+10u16C233+10u16C232+22u16C234+C238 100u16+47u16C21+C214 1u50+1u50C114+C122 0.1u50+C124 0.1u50+C126 10u16+C130 0.1u50+C132 2.2u50+C131 2.2u50C125 10u16C121 0.1u50+1u50C113+C123 0.1u50+C129 0.1u50+()()()()()()()()()()()()()()()()()()(C158 22u35+()()()()()()()()()()()()()()()()()

17、()()()()()()()()()()()1u50C23+1u50C24+C14 1u50+10u16C8+C9100u10+100u16C5+)()()()()()()()()()()()()()()()()()()()()()(1817161514131210PROTECTION CIRCUITTHARMAL DETECTINGPOWER SOURCESTABILIZING+15VDET.ABSO.DET.PEAKDET.ABSO.123DET.PEAK4VCA11DRIVERPRE7VCACOMPARATOR56GND890.022C225220KR2190.01C2210.022C2

18、27R221 33KC223 560P33KC2280.0220.022C226C2220.01220KR220C224560PR222C23010P1234564123HXL4150PC218220PC22016220P4C21932L3EHC217150PEH46L93125C231 0.010.01C23722KR22610 1/4WR22410R2231/4W5600PC236R225 22KC235 5600P68R2334.7KR235K1150KR207390PC20510u16C203+R205160R2030.022C2076.2K12435160R2046.2KR20615

19、0KR208390PC20678960.022C20810u16C204+C201 680PR201 150KC202 680PR202 150KQ31,3210mHL7220PC21515KR21115KR21210mH220PC216L8Q4410KR21410KR2131KR22910R23022KR22710R234R2285.6K1/4W1/4W109876543211112R218 1KR217 1KR216 10KR215 10K3.3KR2311KR232Q47,48121189107654132PLAY/RECPLAY LchGNDPLAY RchREC LchREC Rch

20、BIAS RchBIAS LchBIASERASEEH GND13V123456GND1OUT12Vz13Vref4Fin5Rin6Vcc17Vcc28Vz29OUT210C20 0.110R45C18 0.1R44 1KR42 1KR43 1K1/4W12345R1093.9KC1076800PNCL1MPX1.5KR107R158 18K56E. VOLE. VOL71180VREF7778791A3254REFVR3VR2747576VR1GND7273DACSBIT67GNDVR1686970VR2VR3BIAS6566DACSBIT64631AVREF606261585957REC

21、OUT876109B/C NRDOLBY1211IREF1314VOLRECTEQLMA+SBITDACEQRECEQ-CONTROLERNNNC171615NMHNHC20191821HM222324GHGLGPDACSBIT252627FMFQF/Q282930BIASVCC+LMADACSBITREC OUTB/C NRDOLBY5455515253RECTEQRECVOLEQ49504748ADJ.BIASDACSBIT3132VCCBIAS33343536GNDNMCONTRESET MPXSWC/BON/OFF44454643423738C394041LOGICILLC10310u

22、16+1u50C105+R103 33K1u50C143+1u50C154+C10410u16+C1061u50+C1441u501.5KR1086800PC1083214R1105L2NCMPX3.9K39KR10539KR106R104 33KC213 1u50+3300PC2113300PC2121.5K1.5KC118 2200PC116 2200P22KR1140.033C112220PR112 2.2K10mHL6R116 560C110C120 2200PR126 10KR130R128 4.7KC134 1u50+R159 24KC136 2.2u5022KR1204.7KR1

23、182.2u50C128+1.1KR122R124 1KR145120KR13947KGPR140R14651K36KGLR141R14756K30KGHR142R14868K56KF/QR143R14943K56KFQR144R150220K220KFMNCNNR127 4.7KC133 1u50R125 10KC119 2200PC115 2200PC117 2200PR115 560C127R1214.7KR117R11922K1.1K2.2u50+C111C1090.033220PR123 1K47K22KR113R111 2.2K10mHL5C155 1u50C156 1u50C15

24、7 1u502.2u50C135+C141 18PC138 1u50+R132 100KC137 1u50+R131 100KR151 100KR152 62KR157 3.9KC139 18PR154 5.6KR153 5.6KC140 56PR155 5.6KC142 100PR156 1K29323940414246503300PR161 6.2K0.112K1.2KR163C146R162C14547KR160 120KR164 22K123456789101514131211R210R20912345678910134141350464241403932296312546871092

25、1345879111013121415REC. RMUTE +BBIAS. R13VBIAS. LCLKDATASTRESETREC. LLEV. L5VS. BUSYS. DATAD. GNDA. GNDPLAY. R120/70400/12.5kPLAY. LOSC ATTOSCLINE MUTEREC MUTELEV. R220PC102220PC101100R102100R101220P220PC150C1491.2KR1334.7KR1374.7KR1381.2KR134R13656KR13556K0.01C148100KR168100KR167220PC152220PC151R16

26、9 56KR166 10KR165 10K1314143REC MUTELINE MUTE1234567891013111247KR74.7KR83.3KR1047KR94041R6 100R5 100R3 100R1 10047KR54R2 100100R41R4010065646766CLOSESOL64OPENCASS. SWFinR. INH ARinREADAVSSCETEXNCTXNC73VSSVDD72A337134703569366837673866396540DATA63CLK62PH SW61NC60OSC OUT59NC58GND57GND56GND55GND54NC53

27、STB52DATA51PLAY/REC50BIAS49CLK SYSTEM IC48ERASE47PLAY SW46LEVEL. R45LEVEL. L44R. INH B43I/I42CPM41E2 PROMSYSTEM IC656667R39 10K41R55 47K4243444546474849505152R56 47KR53 47KR51 47K40383959R59 10K15KR521u50C13+R38 100K10KR371KR460.022C271KR271.5KR26GNDOUT INR22100 1/4W+10u16C44VSSDATAA23CLKA0A12VCCNC1

28、5678C12 0.01R3522KR331K22KR34R29 100K330R32330R31R30 100KGNDS.DATAS.BUSYS.GND787776597574454452514861626347KR5847KR576443424661383950494763R361K62180REC FHALL OUTSOLHALFGND12VMOTOR +MOTOR COMMODECrO2METALREC ROPENCLOSECOMMOTOR MOTOR +EHLchRchGNDEH GND+ERASE(BRN)+E (BRN)-E (BLU)+R (GRN)-L (ORG)+L (RE

29、D)LchRch+12VGND(BLU)-ERASE-Rch(YEL)+Rch(GRN)(RED)+Lch-Lch(ORG)EARTH(WHT)-R (YEL)GND (WHT)12345EHEH GNDRchLchGND1234567891013111221RchLch6543CLOSEOPENCOMMOTOR -(CCW)MOTOR +(CW)FEW RECHALL OUTSOLHALFGND12VMOTOR +(CW)MOTOR (CCW)COMMODECrO2METALREV REC1.2K 1WR1731.2K 1WR172R1711.2K 1WR129C147+100u1647KR

30、480.01C10C19 0.01DOLBYHX PROERASE OSCQ45Q46D33Q44Q33Q31Q32IC7(1/2)(2/2)IC7PLAYMUTEPB EQRELAY SELECT.PLAY/RECD32Q41Q43Q42EH CONT.Q48Q47CONT.BIASCN12CN11CN5D18D20CN6Q24Q23Q27Q28Q29Q301234LchRchRECPLAYRchLchQ21Q22MUTED24D23Q25Q26D22D10D21J2J3CPMCONT.Q6Q8CONT.SOLENOIDQ7Q9D8D9Q11Q12Q10RESETD17Q3D4D19u-CO

31、M5VAVRRESETD2D3Q513V AVRE2ROMD12D11D13D14D16D15SYSTEMCONTROLCN10CN4MOTORDRIVECN2CN3CN9LchERASEHEADR/P HEADRchPHOTO REFLECTORMOTORS6S5S4S3S2S1SOLTRAYMOTORS8S7LchRch(BOTTOM VIEW)IC8(X28-2972-71) (C/5)IC6IC1IC3IC4(X28- ) (B/5)(X28 ) (A/5)R/P/E HEADHEAD PCBMECHANISM (D401574 15)IC2R254 1KCAUTION: For co

32、ntinued safety, replace safety critical components only with manufacturers recommended parts (refer toparts list). indicates safety critical components. For continued protection against risk of fire, replace only with same typeand rating fuse(s). To reduce the risk of electric shock, leakage-current

33、 or resistance measurements shall be carried out(exposed parts are acceptably insulated from the supply circuit) before the appliance is returned to the customer.The DC voltage is an actual reading measured with a high impedance type voltmeter with a cassette loadedat playback mode. The measurement

34、value may vary depending on the measuring instruments used or onthe product. Bias circuit DC voltage is measured while in the record mode.DOLBY and the double-D symbol are trademarks of Dolby LaboratoriesLicensing Corporation. Noise reduction circuit made under license fromDolby Laboratories Licensi

35、ng Corporation.X-SG7/SG7GY26-4450-21QPRSTAC22.0V25.5V12.3V12.9V14.0V13.5V25.8V26.0V5.1V)()()()()()()()()()()()()()()C610u16+C7 47u16+1000u35C11+1000u35C1+1u50C22+)()()()()()()()()()()()()()()()()()()(KS0KS1KS2KS38025S. BUSY179267827772876297530743132XTALEXTALR. MUTERSTL. MUTENCOSC ATTNC400/12.5kNC12

36、0/70NCCR F/SNCS. DATA2TEST 23A. ADJ4M. ADJ5TEST 16KS07KS18KS39KS210NC11NC12NC13NC14KR215KR016KR117NC18LED219LED020LED121NC22NC23NC24NC7475767778C170.0110MHzX1R61 47KR60 47KR62 47K12345678910201918151416182019161514R63 47KR64 47KR65 47KR66 47K34567Q13160.01C150.01C16680 2WR244.7R231.81/4W47u16C3+C2R2

37、110K2.7 1/4WR2010KR191000P123132+5.6KR255.6KR280.01C2512T134105150R251150R252R2531507LED G21LED G12LED G08KR29KR1KR06123456798101LED G12LED G03KS04KS15KS36KR07LED G28KR29KR110KS28011/4W1/4WP1RECORDING LINEGND LINESIGNAL LINE22R471/4WR67D66RECD62PAUSED67D63DOLBY CD68D64RVS MODEDOLBY BCRLSS9D49S5D45S1

38、0D50S6D46S1D41S2D42D51S7D47S12D52S8D48S3D43S4D44Q13KS03DRIVEQ14Q16Q15TEST MODEQ212V AVRQ1Q4D7D5D1D6E1E2WH3CN1AC INFWDRVSSTOPFFREWPAUSERECDOLBY NRCRLSON/STANDBYOPEN/CLOSERVS MODES11CN7WH4E3230V50Hz(X28- ) (D/5)(X28 ) (E/5)X-SG7(E)(X28 ) (A/5)D65D61D69ON/STANDBY(RED)(RED)RVS PLAY(GRN)FWD PLAY(GRN)Q45,

39、46Q44Q41Q33Q31,32Q25,26Q23,24Q21,22Q1316Q8,9,11,12,27,28,30,42,43,47,48Q7Q6Q4,5,10,29Q3Q1,2IC8IC7IC6IC4IC3IC2IC1D61,65D32D21D18D1117D8,9,33D57,10,19,20,2224,4152D4D2,3D1: 2SC2785(F,E) or 2SC1740S(Q,R): DTC124ESA or UN4212: 2SC3940A(R,S) or 2SD863(E,F): DTA124ESA or UN4112: DTC143TSA or UN4216: DTA12

40、4EUA or UN5112: 2SD1302(S,T): 2SD2114K: UN5119: DTC124EUA or UN5212: 2SA1286T11: 2SA1534A(R,S): 2SC4081: 2SC3246: 2SD2061(E,F) or 2SD2012: UPC1297CA: TA8125S: BA6209: BR24C01A: PST993DT: HA12167FB: CXP84124144Q: B302522-05D6264,6669: B302513-05: HZS8.2N(B2) or MTZJ8.2(B): HZS4.7N(B2) or MTZJ4.7(B):

41、HZS6.8N(B2) or MTZJ6.8(B): MA111: 1SS131 or HSS104A: 1SS133 or HSS104: HZS5.1N(B2) or MTZJ5.1(B): HZS6.2N(B2) or MTZJ6.2(B): KBP02ML-6127DTA124ESADTC124ESADTC143TSAUN41122SC1740SUN51192SD2114K2SD2061UN4212UN42162SD20122SC4081DTA124EUADTC124EUABA6209UPC1297CAHA12167FBTA8125SUN52122SA1286-T112SA1534A2

42、SC32462SC3940A2SD13022SD8632SC2785434414401436CGLM417426426412411409436424408407425431432402 420CBx2CEx5CIx2CHx2CFx2CDCCCACBx2CA405430410406813434414401436CGLM417426426412411409436424408407425431432402 420CBx2CEx5CIx2CHx2CFx2CDCCCACBx2CA405430410406813434414401436CGLM41742642641241140943642440840742

43、5431432402 420CBx2CEx5CIx2CHx2CFx2CDCCCACBx2CA405430410406813434414401436CGLM417426426412411409436424408407425431432402 420CBx2CEx5CIx2CHx2CFx2CDCCCACBx2CA405430410406813433CJ2111GREASE(EM-30L)2GREASE(MZ-2400):410-0013-05:410-0019-05123ABParts with exploded view numbers larger than 700 are not suppl

44、ied. 10X-SG7/SG7GEXPLODED VIEW (MECHANISM: A)CK556502524554550530B530A526507CQ508562CP560CS555551CS525RPEH531537543512552573570541547515518510557559521511571CO501580568CK563519553545505529572558527564546515CR528521575542576581585CMCK544CO582517506565CNx3CTMM568561815824826804803815809827818805825829

45、811820812 816801816802CKx2CKx2828825817819810808509574530B530A22212222222222221GREASE(EM-50L)2GREASE(EM-30L):410-0014-05:410-0013-05CUCU123CDParts with exploded view numbers larger than 700 are not supplied. 11EXPLODED VIEW (MECHANISM: B)X-SG7/SG7G12X-SG7/SG7GParts with exploded view numbers larger

46、than 700 are not supplied. S 5S 1J 2J 3S 8S10S12S 9S 6S 2S11S 7S 4S 3rev.modeDolby NR CRLSX-SG7REC PLAY IN OUT SYSTEM CONTROL604606645611638637636603646727760728601622BBBBBBBCx4Dx2DEEEx2EFGx2 X28(A/5) X-28 (E/5)X28 (C/5)X28 (B/5)760630650631629640702725726760760635621641708715619620ABCDEFG3x6 (BLK)3

47、x8 (BLK)2.6x103x53X83X8 WASHERM4x6:N09-1445-05N89-3008-45N82-2608-46N84-3005-46N89-3008-46N09-0287-05N86-4006-45632A12EGFEXPLODED VIEW (UNIT)13X-SG7/SG7GPARTS LIST8 New PartsParts without Parts No. are not supplied.Les articles non mentionnes dans le Parts No. ne sont pas fournis.Teile ohne Parts No

48、. werden nicht geliefert.Ref. NoAdd-ressNewPartsDescriptionDesti-nationRe-marksParts No.8 New PartsParts without Parts No. are not supplied.Les articles non mentionnes dans le Parts No. ne sont pas fournis.Teile ohne Parts No. werden nicht geliefert.Ref. NoAdd-ressNewPartsDescriptionDesti-nationRe-m

49、arksParts No.C1C90-3676-05ELECTRO1000UF35WVC2CC73FSL1H102JCHIP C1000PFJC3C90-3649-05ELECTRO47UF16WVC4C90-3658-05ELECTRO10UF16WVC5C90-3650-05ELECTRO100UF16WVC6C90-3658-05ELECTRO10UF16WVC7C90-3649-05ELECTRO47UF16WVC8C90-3658-05ELECTRO10UF16WVC9C90-3643-05ELECTRO100UF10WVC10CK73EB1H103KCHIP C0.010UFKC1

50、1C90-3676-05ELECTRO1000UF35WVC12CK73FB1H103KCHIP C0.010UFKC13 ,14C90-3253-05ELECTRO1.0UF50WVC15CK73FB1H103KCHIP C0.010UFKC17CK73FB1H103KCHIP C0.010UFKC18CK73FB1E104KCHIP C0.10UFKC19CK73EB1H103KCHIP C0.010UFKC20CK73FB1E104KCHIP C0.10UFKC21C90-3649-05ELECTRO47UF16WVC22C90-3680-05ELECTRO1UF50WVC23 ,24C