Luxman-CL35lll-pre-sm维修电路原理图.pdf

《Luxman-CL35lll-pre-sm维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《Luxman-CL35lll-pre-sm维修电路原理图.pdf（11页珍藏版）》请在收音机爱好者资料库上搜索。

1、 ULTIMATEHIGHFIDELITYSTEREOCOMPONENT lOOOO)GjOCL35/m CONTROL CENTER SERVICEMANUAL RadioFans.CN 收音机爱 好者资料库 CIRCUITDESCRIPTION . 1/212AX7 ECC83 1/212AX7 ECC83 1/212AU7 ECC82 200V 2JV l.OK t-;jw:lSignal output 2,H non ieverted in put fig. -1 Equalizer Amplitier inverted input ThecircuitisshownintheFig.

2、1.ThisamphasnotstandardmethodofFeedback,about whichspecialexplanationismadehereunder. Fig.2 showsitsconcept,whereinA-3 meanscathode-followerwithitsgainatOdB.While A-2has+39dBandthereforethegainis+39dBthruA-2 and A-3. AtA-Itheoutputimpedanceis110K ohms by meansofelectricfeedbackfromthecathode side.Lo

3、calfeedbackby 2.2MohmscanbestipulatedasthformulaBeta=1/19.8and amountof NFis14dB.Thereforethegainis+25dBthruA-2andA-3, andinputimpedancebecoms210Kohms. AtA-Iloadis120K ohms andgainis+32dB, andthereforethetotalgaLnis57dB. Fig.3showsR.I.A.A.complex.The. totalNFshallnotbeleviedbelowthe cut-offfrequency

4、of50Hz.Inthecase oftriodeitispossibletosuppressthe distortionbelowthesensinglevelunder flg.-2 smallsignals.Thepresentoperation pointliesatthetotaldistortion balance. II ,. . . 330lPF PF IIII l;F rr 220PF 2201 . phonoposition MlCposition Thisamp.playstheroleofmic.amp.as well. fig.-3 RadioFans.CN 收音机爱

5、 好者资料库 1/212AX7 ECC83 1/212AX7 ECC83 82K 18K10K .-_-Cl+21OV fig.-5 output 1/400V noninverted input0-11- inveried inut o-r-1IH fig.-4 Fig.4 showsthecircuit,wherethe2ndstageisconstitutedbydualampsoflocalfeedback. ThefeedbackcircuitisshowninFig.5.owFrequencyTrimmeroperationisdonebythefeedback circuit.A

6、ttheG)positionroll-offtakesplaceat100Hzandcut-offtakesplaceat250Hz, whileatthe()positioncut-offcommencesat100Hzandroll-offstartsat220Hz. 25lJ.B 1/212AX7 ECC83 ToneControl l.05mA 245V MadeofLUXsexclusiveNFtype. AllcircuitsareshowninFig.6. Thisisstandardtonecontrol withLUXamps.Incidentally operationof

7、tubesatthisstage dependsondistortionandlevel ofgridcurrent. Signal output 1/400V 140V 10001 Signol input fig.-6 fig.- 271 Signnl ovtput LowCutFilter AsperFig.7.thisis-12dB/oct.filter composed by2-stagecouplingofCR. Thisfilterfrequencydependsonthelevel setvolume,andthestandardpointliesat the5thdecrem

8、entfromthemax.position (-6dB). 2 RadioFans.CN 收音机爱 好者资料库 ?45V :!2!_2.:. Composed bycathode-followerasperFig.8. Thebiasisfixedatthisstage.Noise ofzenerisreduceddowntothealiowable Signal levelbyhighcutfilter. Jutp.Jl fig.-S 4700P 4.7K 5.6K92rnH -g,!_!: Shown byFig.9,andattenuates-12dB/oct.by meansofLC

9、.Thefilterfrequencyis decidedinviewofloadandlOOKohms+200pF (maininputimpedanceandshieldwire). Signao-c)-.M)-f-1I- OUTPUT HEADPHONE TONE CONT. AMP CATHODE FOLLOWER OUTPUT LEVELSET BASS FREQUENCY .,-.:;,SELECTOR.-,. AB L.CH. NCONNECTOR R.CH BA R.CH. .ThisdiagramisfortheLEFTCHANNEL. Power source sectio

10、nomitted. I ,I I, INPUT SELECTOR r-r-, III I AUX2 AUX MIC. 11NPUT IMPEDANCE SELECTOR AUX3 PHONO2 PHONO1 MIC.J.ACKrr: -J RadioFans.CN 收音机爱 好者资料库 SPECIFICATIONS Tubes: FrequencyResponse: T.H.O.: OutputVoltage: OutputImpedance: InputSensitivity: (output;1V, outputlevel max.) Input Impedance: SIN Ratio:

11、 Equalizer: Tone Control: Bass: Treble: Filter: Low Frequency Trimmer: 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-ohms phono-1l.4mV phono-2l.4mV aux-l140mV (variable) aux-2140mV aux-3140mV (va

12、riable) microphone0.7mV phono1lOOK ohms, 50K ohms, 30K ohms phone-250K ohms aux-llOOK ohms aux-2150K ohms aux-3lOOK ohms microphone 50K ohms better than 64dB (phono-l II.u1 .-0-.1111IIIDclIlisML_Ir-S.SI,te21IIIt W 2-u.s.IIII11D2So,I, v._,2I:rS2CII_g1,1YJlilAl PHONO-III,.25A,l.A,lorAl./v?JIr.:VI25OIl

13、l(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;3 1 SIt.-IIs,!.L 1111miD.14llct!ofr-31: PHONO-II, lliDIHII2lD.Cll11IIf!.:;?.It.I.C/11- I1Pr,;-;t1.-.!lICll.il,1_Cll,I.21,1 tI!;,.J2AxlI11IZ.211.12Ax1,.1ZAIlI,.2AxlI1l156DID.12Axl.:;,.12Axl

14、oc.fZAxl lUX-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,mlll Il,mD5Jr.-1.1:.t.II=;- :JIV-:1oJ:11f-+I-II-IN1-ID-+-IJ_iffh!: m;f1:-H!niriJ:,1L

15、.H-:-I1jmjl-DIf-PREOUT _+-_-Jl-+-J-+_+-+-+_-I-+-_-t-.-+._-+.,+.;.-t-.o.-+-+-.-+.-.-+-.-;-+-1- Ill l-1- AIlIIIII.St! ItIIInct AIlllI.StI Mlia,. ImlSt! TlIo HIlI.Iatt,LmI -1-1-1-+-, iPnUT I I I I I I 1 I 1 I -_-_-_-_-_-J I VI.db h,. YI.I,411 VIta,2t1 1,111 h.llI i Iq, -it- Yl71,7b VIa.Itl r-,I II1111.

16、 +-IbIdIeI,1.01(A) !-.t=t=:=.J1 1- -,.-)-I+7AAI.jII:iHiAII: .+_-I-+-+_-_i_-oJ:-+_-.,!-II_)-!I IAI/!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 .,1HElDPHOIE l

17、J H-Nlfo-1-J1Mf.-.JI.-t-+V-+-+-:-o-I.-,.IPlII!;Illto)iI1r+-+-:lr:.Jy I.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()Ii l.-t-t-t-:.!T!-.,:l.,lI IL -+1,-_-_-_-f.lII+-tIMl;_-_-_-_-_-_-_-_-_-_-_-_-_-

18、_-_-_-_.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.

19、1.25H) (1.1IH,.Z.1ItIltat.I.1ZKH,) - -1- 1- 1II AeLIME BDH-lINI I. IM. lowCut HillCil .ow. Plito,P SIfUpT. S I. MDtiIor -1- STa,lb. S2,.2b,2e,2d, S3,.3b,3e,3d,3e,31, S44b.4e.4d, S5a,5b, S8 S7,.7b, Sea.8b.8e,8d, Sea,8b.ge,ed, SIO,lOb, Sll.llb. S12,12b.12e,12d, S3,13b.13e,13d, S14 L_ I 111nlll 11.,lIlIlllI I 5(;?I, r-t; If2lI t-t-: 1 I 1 I I I Sr.Z .,OOI Slb1,11.lll A) / o t-.,.+H-1-!;,.-=- PH010-I lUX-II PHONO-II IIC lUX-III lUX-I IICJlCK MONITOR-l RECOUT-II RECOUT-I MOIITOR-II MONITOR-I RECOUT-I MONITOR-II RECOUT-II RadioFans.CN 收音机爱 好者资料库