Luxman-CL35lll-pre-sm 维修电路原理图.pdf

ULTIMATEHIGHFIDELITYSTEREOCOMPONENTlOOOO)GjOCL35/mCONTROL CENTERSERVICEMANUALRadioFans.CN 收音机爱 好者资料库 CIRCUITDESCRIPTION.1/212AX7ECC831/212AX7ECC831/212AU7ECC82200V2JVl.OKt-;jw:lSignaloutput2,Hnon ievertedin putfig. -1Equalizer AmplitierinvertedinputThecircuitisshownintheFig.1.ThisamphasnotstandardmethodofFeedback,aboutwhichspecialexplanationismadehereunder.Fig.2 showsitsconcept,whereinA-3 meanscathode-followerwithitsgainatOdB.WhileA-2has+39dBandthereforethegainis+39dBthruA-2 and A-3.AtA-Itheoutputimpedanceis110K ohms by meansofelectricfeedbackfromthecathodeside.Localfeedbackby 2.2MohmscanbestipulatedasthformulaBeta=1/19.8and amountofNFis14dB.Thereforethegainis+25dBthruA-2andA-3, andinputimpedancebecoms210Kohms.AtA-Iloadis120K ohms andgainis+32dB, andthereforethetotalgaLnis57dB.Fig.3showsR.I.A.A.complex.The.totalNFshallnotbeleviedbelowthecut-offfrequencyof50Hz.Inthecaseoftriodeitispossibletosuppressthedistortionbelowthesensinglevelunderflg.-2smallsignals.Thepresentoperationpointliesatthetotaldistortionbalance.II,.330lPFPFIIIIl;Frr220PF2201.phonopositionMlCpositionThisamp.playstheroleofmic.amp.aswell.fig.-3RadioFans.CN 收音机爱 好者资料库 1/212AX7ECC831/212AX7ECC8382K18K10K.-_-Cl+21OVfig.-5output1/400Vnoninvertedinput0-11-inveriedinuto-r-1IHfig.-4Fig.4 showsthecircuit,wherethe2ndstageisconstitutedbydualampsoflocalfeedback.ThefeedbackcircuitisshowninFig.5.owFrequencyTrimmeroperationisdonebythefeedbackcircuit.AttheG)positionroll-offtakesplaceat100Hzandcut-offtakesplaceat250Hz,whileatthe()positioncut-offcommencesat100Hzandroll-offstartsat220Hz.25lJ.B1/212AX7ECC83ToneControll.05mA245VMadeofLUXsexclusiveNFtype.AllcircuitsareshowninFig.6.ThisisstandardtonecontrolwithLUXamps.Incidentallyoperationoftubesatthisstagedependsondistortionandlevelofgridcurrent.Signaloutput1/400V140V10001Signolinputfig.-6fig.-271Signnl ovtputLowCutFilterAsperFig.7.thisis-12dB/oct.filtercomposed by2-stagecouplingofCR.Thisfilterfrequencydependsonthelevelsetvolume,andthestandardpointliesatthe5thdecrementfromthemax.position(-6dB).2 ?45V:!2!_2.:.Composed bycathode-followerasperFig.8.Thebiasisfixedatthisstage.NoiseofzenerisreduceddowntothealiowableSignallevelbyhighcutfilter.Jutp.Jlfig.-S4700P4.7K5.6K92rnH-g,!_!:Shown byFig.9,andattenuates-12dB/oct.bymeansofLC.ThefilterfrequencyisdecidedinviewofloadandlOOKohms+200pF(maininputimpedanceandshieldwire).Signao-c)-.M)-f-1I-OUTPUTHEADPHONETONE CONT.AMPCATHODEFOLLOWEROUTPUTLEVELSETBASS FREQUENCY.,-.:;,SELECTOR.-,.ABL.CH.NCONNECTORR.CHBAR.CH.ThisdiagramisfortheLEFTCHANNEL. Power source sectionomitted.I,II,INPUT SELECTORr-r-,IIIIAUX2AUXMIC.11NPUT IMPEDANCESELECTORAUX3PHONO2PHONO1MIC.J.ACKrr:-J SPECIFICATIONSTubes:FrequencyResponse:T.H.O.:OutputVoltage:OutputImpedance:InputSensitivity:(output;1V,outputlevel max.)Input Impedance:SIN Ratio:Equalizer:Tone Control:Bass:Treble:Filter:Low FrequencyTrimmer:Attenuator:Accessories:Dimensions:Weight:12AX7 (6),12AU7(1)15Hz-40,OOOHz(-ldB)no more than 0.06% (ratedoutput:2V)Max. 15V (distortion 0.3%)550-ohmsphono-1l.4mVphono-2l.4mVaux-l140mV (variable)aux-2140mVaux-3140mV (variable)microphone0.7mVphono1lOOK ohms, 50K ohms, 30K ohmsphone-250K ohmsaux-llOOK ohmsaux-2150K ohmsaux-3lOOK ohmsmicrophone 50K ohmsbetter than 64dB (phono-l & 2)better than 77dB (aux-l & 2 & 3)better than 60dB (microphone)R.I.A.A. (strandard deviation 0.3%)LUX type NF systemwithdefeat position150Hz, 300Hz, 600Hz1.5KHz, 3KHz,6KHzLow cut25Hz, 60HzHigh cut7KHz, 12KHz100Hz - 800Hz(0.8dB, 250Hz)-20dBTapeMonitorCircuit,PhonoInputImpedance Selector, Socketforstep-uptransformer, HeadphoneCircuit476(19-1/25)Wx275(11)0 x 190(7-3/5)HmmNet 12Kgs (26.40Ibs)Gross14Kgs (30.8Ibs)Specifications and appearance design subjecttopossiblechangewithoutnotice.8 LUX CORPORATION,JAPANHEAD OFFICE81FACTORY1-8-31 NAGAHASHI, NISHINARI-KU OSAKAPHONE:632 0031CABlE:lUXELECT OSAKATElEX:J63694LUXAUDIOOF AMERICALTD.200AerialWay.Syosset.NewYork11791.U.S.A.PHONE:(516)822-7070PrintedinJapan.-PIEOUTiCL35111IIiIIIIIIIIIIIII_.JIh1,Ola-tI,12A11.:11-133.1201-1226,1101-1110%WAUImLevelSetAUIILevelSitI.Mlil011.lassTreIIIILev.SitHad,.LevelIIlIIXn(II)1m 11!l(II),.IIla.lbI2a.2bVI3a.3I.a.,VISa.5b,.6a.6VIla.lVIla.Ibb.JIl(II)lul_n(II)I.1m2.210(11)r-+-IINVfVr-+Vr-.-1l.-.VVw-t-.t.JIY8J2.-VV-1II11l24ft-r-t-(1.100102.SOlo3.3310)(.1.8ft2.11-)(1.AUIm2.PIIOIon3.I.AUIn5.AUII5.ME)(1.,.22.SOIfse3.2101)(1.MOIitar1.2.SDIlrse3.MOIIIr2)(1.leverse2.loi3.I+l4.15.L)(1.t2.II)(1.1M2.Fl.3.Up)(1.DefIat2.II)(1.158Hz2.300Hz3.600Hz)(1.1.5IHz,2.31Hz3.&IHz)O.60Hz2.Detut3.25Hz)(1.11Hz2.Iefut3.121Hz)ImlnICHAIIln.MtIIIIA.lJ.J_T.fillTnh.Tn0-lowCItHiPCItPow.S11.lbSII.lb.Ie.S91, 9b.ge.9SlOa.labS11a.11bS121.12b.12c.12.S13a.13b.13e.13dS14StleHI$S11.1.,.I.IIIP.S21.2.2e.2.S.UpTr.S31.3.3e.:N.31.31SeIIcbIS41.D.4c.S51.DSI2JIIIIIIIIIIIL_AlIII.1AUI-lAIIIn.nMIC.lEe.liTIMIC.JACIlB.IIT-llie.IT.Ilie.JACIAUI!AlIIIAIIIn.n.-1 IIH,lm5.11ll.IIUIDlUX-IIIE,2tIC,1.lu11II.;II.u1.-0-.1111IIIDclIlisML_Ir-S.SI,te21IIItW2-u.s.IIII11D2So,I,v._,2I:rS2CII_g1,1YJlilAlPHONO-III,.25A,l.A,lorAl./v?JIr.:VI25OIll(1)I C .D6lafCHII.IM._Cll_,_11511f-JINV!lt-+_51J. -IIIl1.ullllHOD .ICV,-,Z:-W.V-t-,-t.r.Jl-1.J!.Jl-SI.1A111;31SIt.-IIs,!.L1111miD.14llct!ofr-31:PHONO-II, lliDIHII2lD.Cll11IIf!.:;?.It.I.C/11-I1Pr,;-;t1.-.!lICll.il,1_Cll,I.21,1tI!;,.J2AxlI11IZ.211.12Ax1,.1ZAIlI,.2AxlI1l156DID.12Axl.:;,.12Axloc.fZAxllUX-IIVI,.Z5IIll(A)+-t-.I_-107VVIllII1Vk-;I;I;21!-lsHI.DfH.lUX-IfC-S),2I.1101.rnrr_-T.J.-II;,;._+-+-.-.,!lzn;tll;,;._lfICllU,JqD.l:UIDI_111.;-IS.11151.IID_/_:;LI,r._!_C,lllpI,SHItiI1i:5)I!5)SlI.Ir-.,H2117,mlllIl,mD5Jr.-1.1:.t.II=;-:JIV-:1oJ:11f-+I-II-IN1-ID-+-IJ_iffh!: m;f1:-H!niriJ:,1L.H-:-I1jmjl-DIf-PREOUT_+-_-Jl-+-J-+_+-+-+_-I-+-_-t-.-+._-+.,+.;.-t-.o.-+-+-.-+.-.-+-.-;-+-1-Illl-1-AIlIIIII.St!ItIIInctAIlllI.StIMlia,.ImlSt!TlIoHIlI.Iatt,LmI-1-1-1-+-,iPnUTIIIIII1I1I-_-_-_-_-_-JIVI.dbh,.YI.I,411VIta,2t11,111h.llIiIq,-it-Yl71,7bVIa.Itlr-,III1111.+-IbIdIeI,1.01(A)!-.t=t=:=.J11-,.-)-I+7AAI.jII:iHiAII:.+_-I-+-+_-_i_-oJ:-+_-.,!-II_)-!IIAI/!I;,1Z1!i:I: (-+c:J-ci!I-./r-.:.i-.:.-.:.-.:.ti-.:.-.:.-.:.-.:.i-=-=-t-=-=-1-.:.-.:.1-=-=-=-t.,+I-_-_-_-_-_-_-_-_-_.,tt-;.A1?:-Cl.r-:-:tIIllZ11!5I-;.;IIIIIII.IMI,00222nJl=IllS1.21S!rv .,1HElDPHOIElJH-Nlfo-1-J1Mf.-.JI.-t-+V-+-+-:-o-I.-,.IPlII!;Illto)iI1r+-+-:lr:.JyI.III-IfII.DlWhUllllWh,llOlllW-h:IIZ.IID.lP1DIIl;I-.!ZSAIU5.a?-=;fi:It+-t-t-.211,!gLr:s.-+:/.Ill=;I!IIIr-C;I%pI,nllll:I,;,:.;:.2:!r:xi-f-_:;5:!EK!IG()Iil.-t-t-t-:.!T!-.,:l.,lIIL -+1,-_-_-_-f.lII+-tIMl;_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_.J-I-t.iL.+-,(1.IIDIll2.5.11.1ll)(1.I,2.Dlf)(l.Aull!.2.P_II.I.PItotoI.UUIII,5.AIllI.I.MIC)(1.IIDZ.2.S1IlI1U,I.2ta1)(1.MlIti1or1,Z.S.,I.M)(1.1.,.,Z.NonuI,1.1+l,UlooaI,5.MIIII1Il)(1.o.t,2JI)(1.1.Z.FlaI,l.Up)(l.Itfftil.2.I)(1.I5.HZ.ID.H,.I.II.H,)(1.1.5IHz,Z.IIH,I.IIH)(U.H2.1Itl1ttt.1.25H)(1.1IH,.Z.1ItIltat.I.1ZKH,)- -1-1-1IIAeLIMEBDH-lINII.IM.lowCutHillCil.ow.Plito,PSIfUpT.SI.MDtiIor-1-STa,lb.S2,.2b,2e,2d,S3,.3b,3e,3d,3e,31,S44b.4e.4d,S5a,5b,S8S7,.7b,Sea.8b.8e,8d,Sea,8b.ge,ed,SIO,lOb,Sll.llb.S12,12b.12e,12d,S3,13b.13e,13d,S14L_I111nlll11.,lIlIlllII5(;?I,r-t;If2lIt-t-:1I1IIISr.Z.,OOISlb1,11.lllA)/ot-.,.+H-1-!;,.-=-PH010-IlUX-IIPHONO-IIIIClUX-IIIlUX-IIICJlCKMONITOR-lRECOUT-IIRECOUT-IMOIITOR-IIMONITOR-IRECOUT-IMONITOR-IIRECOUT-II