Technics-SL-1200_Mk2-Service-Manual电路原理图.pdf

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1、ServiceManual TurntableSystem SPECIFICATIONS General Powersupply: Powerconsumption: Dimensions: (WxHxD) Weight: Turntablesection Type: Drivemethod: Motor: Turntableplatter: Turntable speeds: Pitch control: ;:cartingtorque: Build-up characteristics: Brakingsystem: Speedchangedueto loadtorque: Wowandf

2、lutter: *Thisratingrefersto turntableassemblyalone,excluding effectsofrecord,cartridgeortonarm,butincluding platter.Measured byobtainingsignalfrombuilt-infre- quencygeneratorofmotorassembly. Specifications subject tochangewithoutnotice. PanasonicCompany DivisionofMatsushitaElectric CorporationofAmer

3、ica OnePanasonicWay,Secaucus, NewJersey07094 Thisserviceliterature isdesignedforexperienced repairtechnicians onlyandisnot designedforusebythe generalpublic. Itdoesnot containwarningsor cau:.onstoadvise non-technicalindividuals of potentialdangersinattempting toserviceaproduct.Productspowered byelec

4、tricityshould beservicedor repairedonlyby experienced professionaltechnicians.C.iyattemptto serviceorrepairthe product or,productsdealtwith inthisserviceliterature t;+anyoneelsecould restin. .seriousinjury ordeath. SL-12 PanasonicHawaii,Inc. 320WaiakamiloRoad,Honolulu, .Hawaii96817 AWARNING ORDERNO.

5、SD7908-1601 OMK2 (M),(MC) ThemodelSL-11200MK2(M)isavailableinU.S.A.only. *ThemodelSL-1200MK2(MC)isavailableinCanadaonly. Weightanddimensionsshownareapproximate. CudMatsushitaElectricIndustrialCo.Ltd. Allrightsreserved.Unauthenzed copyinganddistributionisaviolationoflaw MatsushitaElectricofCanadaLtd.

6、 5770AmblerDrive, Mississauga,Ontario LAW2T3 Armheightadjustment range: 31.8-37.8mm(helicoidpart6mm) (1-21/32-3-35/64) Quartzdirectdrive(helicoidpart15/64) ManualturntableOverhang:15mm(19/32) DirectdriveEffectivemass:12 g(withoutcartridge) BrushlessDCmotorOffset angle:22 AluminumdiecastFriction:Less

7、than7mg(lateral,vertical) Diameter33.2cm(13-5/64)Trackingerror angle: Within232(attheoutergrooveof Weight2 kg(4.4 lb.)30cm(12) record 33-1/3rpmand45rpm Within032(attheinnergrooveof Allquartz-locked8%range 30cm(12) record 1.5kg-cm(1.3Ib-in)Styluspressure adjustmentrange:0-2.5g 0.7 s.fromstandstillto3

8、3-1/3rpmApplicablecartridge6-10g Electronicbrake weightrange: 13.5-17.5g(includingheadshell) (withauxiliary9.5-13g 0%within1.0kg-cm(0.87Ib-in) weight):17-20.5g(includingheadshell) 0.01%WRMS* (withshellweight):3.5-6.5g 0.025%WRMS(JISC5521) 11-14g(includingheadshell) 0.035%peak(IEC98AWeighted)Headshel

9、lweight:7.5g Rumble:-56dB(IEC98AUnweighted) 120V,AC,50or60Hz-78dB(IEC98AWeighted) 12W 45.3x16.2x36cmTonearmsection (17-27/32x6-19/64xl4-11/64)Type:Universal 11kg (24.3lb)Effectivelength:230mm(9-1/16) RadioFans.CN 收音机爱 好者资料库 SL-1200MK2 CONTENTS DISASSEMBLYPROCEDURE. . . . . . . . .2,3 PARTSIDENTIFICA

10、TIONS. . . . . . . . . . . ? 3 ARMBASEASSEMBLINGPROCEDURE. . . . . ? 4 FEATURES . . . . . . . . . . . . . .5 ADJUSTMENTS. . . . . . . . . . . . . ? 6 SCHEMATICDIAGRAM . . . . . . . . . . . . .7,8 REPLACEMENTPARTSLIST(Electrical) . . . . . ? 9 TROUBLESHOOTING. . . . . . . . . . . ? 10 DISASSEMBLYPROC

11、EDURE Howtoremovepanelcover 1.Removeheadshellandturntable. 2.Securearmwitharmclamp. 3.Remove5screwsOofthepanel coverasshownin Fig. 1. HowtoremovestaterframecoilandF.Gdetector coil 4.Remove3connectors O and2readwiresfrom powertransformerasshowninFig.2. 5.Remove3screwsofthedrivecircuitboardand3 screws

12、ofthestaterframecoverasshowninFig.2. 6.Disconnect18solderedpartsOofthestatercoiland 4solderedpartsOoftheF.G detectorcoil asshowin Fig.3. 7.Remove3screws Qofthestaterframeassyasshown inFig.3. Howtoremovebottombaseassy 8.Remove4audioinsulators.(Counterclockwiserotation) 9.Remove17screwsandspacerQassho

13、winFig.4. 10.Remove11screwsOasshowninFig.4. Howtoremovestylus-illuminatorlamp 11.Remove2screwsQofthestylus-illuminatorlamp assyasshowninFig.5. 12.Remove1screwOasshowninFig.6. Howtoremoveneon-illuminatorL.E.D. 13.Remove4screws QasshowninFig.5. 14.Remove1circlip QandswitchcamQQ asshownin Fig.5. 15.Rem

14、ovestrobo-illuminatorcase. Howtoremovetonearm 16.Remove4screwsQofthearmbasecoverasshownin Fig.5. 17.Remove2screwsofthephonocordclamperas showninFig.5. 18.RemovephonocordclamperasshowninFig.7. 19.Remove2screwsQofthephonocordp.c.b.asshown inFig.8. 20.Remove2screwsasshowninFig.8. 21.Remove2screwsQofthe

15、siliconoildumperasshown inFig.8. 22.Remove3screwsQasshowninFig.8. 23.Remove2screws0ofthetonearmasshownin Fig.9. PRINTEDCIRCUITBOARD . . . . . . . . .11,12 ADJUSTMENT(Electrical). . . . . . . . . . 13 REFERENCEVOLTAGEANDWAVEFORMATEACHIC PIN. . . . . . . . . . . . . . . .13,14 BLOCKDIAGRAM. . . . . .

16、. . . . .15,16 EXPLODEDVIEWS. . . . . . . . . . . . .17,18 REPLACEMENTPARTSLIST(Mechanical). . . . . ? 19 EXPLODEDVIEWS. . . . . . . . . . ? 20 RadioFans.CN 收音机爱 好者资料库 Hinge Powerswitch Strobe-illuminator/ pilotlamp Lampcaset Speedselectbuttons mPARTSIDENTIFICATION Fig. Arm-heightadjustmentring Bala

17、nceweight Fig.10 Fig.9 10 .ARMBASEASSEMBLINGPROCEDURE 4 1.Attachthecontrolringto thearmbaseseat.(The controlringshouldberoatedcounterclockwise.) 2.Completelytightenthecontrolring,andthenloosenit 1.5-2 .5turns tosetthescaleto3.(See Fig.11) 3.Holdthearmbaseandsettheredlinemark onthearm basetothe scale

18、near2, thenturn thearmbase clockwise.(See Fig.12) Note: Takecarenotto allowdeflectionof the predetermined positionsofthecontrolringandarmbaseseat. Fig.12 4.Adjustthearmbasesothat theredlinemarkonthearm baseissettothescale3of thecontrolring. Next, securethepositioningbaseplatewithtwosetscrews. (SeeFi

19、g.13) 5.Rotatethe controlringandmakesurethat thearmbase shiftswithintherangeof0-6mm.(See Figs.14and15) Ifitdoesnotshiftwithinthespecifiedrange,thearm basepositionisdeflected.Inthatcase,disassemblethe partsandcheckasspecifiedinstep 3. ADJUST SPRING ENTOFCANCELLER POSITION IfthearmbodyorPUbaseplateisr

20、eplaced,besure toset thecancellerknobto0.5andmakesure that the can- cellerspringisincontactwiththearmshaft.(See Fig.16) ifthecancellerspringisdeflected,adjustitasfollows: 1.Clampthearmontherest. 2.Setthecancellerknobto0.5. 3.RemovethePUbaseplate,adjust gearQso that the cancellerspringisintheposition

21、ofFig.16. 4.MountthePUbaseplateontothearmbaseandcitck thespringposition. FEATURES Totalquartz lockedcontinuouspitchadjustment f8% Quartz-phase-lockedcontrolmeansalmostperfectaccuracy ofturntablerotation. Butwithmostquartzturntables,thisaccuratecontrol circuitmustbecutoutwhenthepitchcontrolisemployed

22、. WiththeSL-1200MK2,however,pitchisvariablecon- tinuously(analogically)byupto8%undertotalquartz- lockedcontrol.Thepitchiscontrolledwithalargesliding lever,locatedtotherightoftheturntableplatter. Fourlinesofplattermarkingsarealsoprovidedindicating +6%,+3.3%,0%(exactratedspeed)and-3.3%change fromrated

23、speed. Aluminumdiecastcabinetandspecialheavyrubber basematerialprovideacousticisolation Theeffectsof externalvibrationsaredramaticallyreduced inthe turntablebythisnewturntable construction. Theturntablebaseisprecision-madealuminumdiecast. Andtheundersideofthemainbaseismadeofaheavy rubbermaterial(spe

24、cialone-piecemolding)whichhas excellentvibrationresistanceandabsorbingcharacteristics. Theturntableplatterisalsovibration-dampedwithspecial- lyfabricatrubbermattingintheunderside alongwiththe thick turntable sheet(rubbermat).Fourlarge-sizeinsulating feet alsohelp toabsorbunwantedvibrations. These ?

25、featuresmakeSL-11200MK2idealforusewithextra- highsoundpressurelevels. Hightorqueforfaststarts Theintegralrotor/plattermotordelivers1.5kg-cm(1.3lb-in) startingtorque.Thishightorquegivesveryquickstarts enablingtheplattertoreach33-1/3rpmwithin0.7s.(a quarterofaturn).Thisisabigadvantageinmanyprofes- sio

26、nalapplicationswherefastcueingisanecessity. Stylusilluminatorforlow-lightconditions Youllappreciatethestylusilluminatorwhenyouareusing theturntableunderlow-lightconditions.Theilluminator canbehiddenintheturntablebase,shouldyouneed it, simplypushabuttonanditwillpopupgentlyandcasta beamoflightacrossth

27、ediscintheareatraversedbythe tonearm. SL-1200MK2 Youcanthenclearlyseethe spacesbetweentheselections on therecord,andcue thearmexactlywhereyouwantit. Theilluminatorcanthenbe pushed backdownintothe base. Highsensitivity,lowmass,gimbal suspension tonearm Thehighlysensitivetonearmfeaturesagenuinegimbal

28、suspension,therotationalcenterofwhich isprecisely definedatonepoint.Bearingsarefinishedtoatoleranceof 0.5microns.Thisandtheextra-closeness ofpivotcenter tothebearings,resultintheminimalfrictionof7mg (0.007g)forbothhorizontalandverticalmovement.Add tothisthelow 12-grameffectivetonearmmass(including h

29、eadshell,withoutcartridge)andyouhaveatonearmcom- patiblewiththewiderangeofcompliancesfoundintodays cartridges.Ifyouchoose apopularhighcomplianceMM cartridge,thelowrangeresonancefrequencywillappearin thecorrectarea toavoidwarpfrequenciesofrecords,but withoutenteringthelowendoftheaudio spectrum.This t

30、onearmisprovided withacomputerdesigned,light-weight, high-rigidityheadshellmadeofsingle-piece diecastaluminum toresistpartialvibration.Theuniversaldesign allowshead- shellinterchangeability.Contactsaregold-plated. Helicoidtonearmheightadjustment Armheightisadjustablewithinarangeof6mmtoaccom- modatev

31、aryingcartridgedimensions.Adjustmentsaredone withaprecision-madehelicoid. Otherfine features Quickstopsareachievedwithafullyelectronicbraking system. Astrobeilluminatorisprovided.Thestroboscopeiscon- trolledbytheextremelystablequartzoscillator,rather thanpotentiallyunstableAClinefrequency. Poweron/o

32、ffcontrolbuilt-intostrobeilluminatorfor ease-of-operation. Soft-touchstart-stopswitchallowingprecisioncontrol capabilitywithouttheannoyanceofaccidentaloperation. Technicsintegralrotor/plattermotorconstructionwith fullcycledetectionFG. )MK2SL-1200MK2 :ig.17 ADJUSTMENTS (t)appearsstahonaryatthepitchof

33、,611, (2)appearsstahonaryatthepitchof3.3% f3fappears slat, onaryatthepitcho;11 (4)appearsstahonaryatthepitcho33% Fig.19 Adjustmentof thetonearmheight(SeeFig.22.) Theheight of thetonearmcanbeadjustedupto6mm,and ascaleisprovidedonthe adjustringin0.5mmincrements. Besure tosettheproperarmheight using th

34、eadjustring scaleandreferringtothetable. Forexample,ifthecartridgeheightis17.5mm,thearm- heightadjustringshouldbepositionedattheintermediate locationbetween2and3onthescale.(SeeFig.22.) Caution: Besure tolockthetonearmbyturningthearmlockknob inthedirectionindicatedbythearrowafterfinishingthe heightad

35、justmentfor thetonearm. Lubrication(SeeFig.23.) Apply2 or3dropsofoilonceafterevery2000hoursof operation. Thetimeintervalismuchlongerthanthatforconventional type motors(200-500hours). Pleasepurchaseoriginaloil.(PartnumberisSFWO010.) Heightofcartridge(mm) (H) Scale readingonthearm-height adjustring 15

36、 0 16 1 17 2 18 3 19 4 205 21 lections Pitchcontrol(fineadjustmentofspeed)(SeeFigs. wantit. 18and19.) ntothe Whenthepitchcontrolknobislocatedatthecenter of the positionafterturningonthe power,the greenLEDindicator islitshowingtheoperatingconditionforthepredetermined ension speed(either33-1/3or45rpm)

37、.Thepitchcontrolisvariable in arange of0-8%. gimbal Adjustmentshouldbedoneonthebasisofindicatorscale. recisely Figuresontheindicatorshowapproximatepercentagesfor of variablepitch control. -ance tcenter Whenthe strobe dotsin4stagesmarkedat theperipheral f7 edgeof the turntableappeartobestationary,var

38、iationof mg nt.Add individualpitchesisshown.(SeeFig.19.) icludingNote: mcom- Thestrobe-illumination ofthisunitemploysastrobe-illu- todays minatorLEDsynchronizedwiththeprecisequartzfre- iceMM quency. )pearin Forfineadjustmentoftheturntablespeed, be sure to As,but effecttheadjustmentaccordingtotheLEDi

39、llumination. m.This TheLEDilluminationisnot synchronizedwithfluorescent weight, lamps. iminum Adjustmentofarm-liftheight(SeeFigs.20and21.) vshead- Thearm-liftheight(distancebetweenthestylus tipand recordsurfacewhencueingleverisraised)hasbeen adjustedatthefactorybeforeshippingtoapproximately accom- 8

40、-13mm. redone Ifthe clearancebecomestoonarrowortoowide,turnthe adjustmentscrewclockwiseorcounterclockwise,while pushingthearmliftdown. Clockwiserotation braking -distancebetweentherecordandstylustipisdecreased. Counterclockwiserotation iscon- -distancebetweentherecordandstylustipisincreased. ,rather

41、 Note: itorfor Asthe adjustingscrewhashexagonalhead,be sure tomake theadjustmentwhiledepressingthearmlift,orthescrew control willnotmovefreely. eration. Alsobesure that thehexagonalheadretractscorrectlyinto )nwith thearmliftwhenthelatterisreleased. SchematicDiagram ? (Thisschematicdiagrammaybemodifi

42、edatanytimewiththedevelopmentof 2 ? 3 ? 4 ? 5 ? 6 ? 7 VR20150KB R2154.7K R214 22K 5201 33 IC201 TP4 AN6680 Q 120.6 R54 D2 SVORD5.1E Q202 R2042. TP22 TF AC117V(50/60Hz) VR303 IMPORTANTSAFETYNOTICE POWERSWITCH pnai ? ORG T.I YtiO-iF r1 ? R601 350MA ? 4.7 BLU D204 MA150 5203 S/S D1 SVDSlRBA20 15202 THE

43、SHADEDAREAONTHISSCHEMATICDIAGRAMINCORPORATES SPECIALFEATURESIMPORTANTFOR SAFETY. WHENSERVICINGIT ISESSENTIALTHATONLYMANUFACTURER SPECIFIEDPARTSBEUSEDFORTHECRITICAL COMPONENTSINTHESHADEDAREASOFTHESCHEMATIC. u TP21 Q3 D201,202 SVDSR105C J C C R205 45 PITCHLOCK SWITCH ? SPEEDSELECTORSWITCH PITCHCONTROL

44、VOLUME ? STR( A B C Braking D adjustment E Adjustmentof F pitch control 0%(Pitch) PitchAdjustment (GAIN) G H ,developmentofnewtechnology.) 7 8 fP3 220 P19 .213 Ilop i OVI WITCH D206 STROBEILLUMINATOR PLl 5401 D204D205 STYLUS-ILLUMINATOR 9 NOTO: 10 S601:PowerswitchinONposition. ThedrivecircuitICvolta

45、geandwaveformarenot indicatedinsidetheschematicdiagram. Indicatedvoltagevaluesare thestandardvaluesfor theunitmeasured byDCelectroniccircuittester (highimpedance)withthe chassistakenas standard.Therefore, theremayexistsomeerrorsin thevoltagevalues,depending ontheinternalim- pedanceoftheDCcircuittest

46、er. 1.S201:Speed selectorswitch(33-1/3r.p.m.)in 6. ONposition.(push condition) 7. 2.S202:Speedselectorswitch (45r.p.m.)inOFF position.(not-pushcondition) 8. 3.S203:Start/StopswitchinOFFposition.(not- pushcondition) 4.S301:PitchlockswitchinON position.(center position) 5.S401:Stylus-illuminatorswitch

47、inOFFposition. REPLACEMENTPARTSLIST(Electrical) Notes: ? 1.Partnumbersareindicatedonmostmechanicalparts. Pleaseusethispartnumberforpartsorders. 2.indicatesthatonlypartsspecifiedbymanufacturerbeusedforsafety. 3.SL-1200MK2(M)+MI,SL-1200MK2(MC)+(MC1 0TERMINALGUIDE OF TRANSISTORANDIC Ref.No.PartNo.PartN

48、ameI#F,50V R101ERD25FJ103Carbon,10kfl,1/4W,t 5% C304 ECEA1HS100ElectrOiytic,10pF,50V R102ERXIANJ4R7MetalFilm,4.7fl,1W,t 5%C305ECQMlHl22KZPolyest&;0.0012pF,50V,10% R103ERD25FJ472Carbon,4.7kfl,1/4W,t 5%C306ECEA50Z1Electrolytic,1pF,50V R104 ERD25TJ473 Carbon, 47kQ,1/4W,t 5%C601MIECQFlA473MDPolyester,0.

49、047pF,400V, t20% R105ER026FJ403Carbon,10kfl,1/4W,t 5% C601MCI AECQUIA473MEPolyester,0.047pF,400V,t20% R106ERD25FJISOCarbon,1511,1/4W,t 5% R107 ERXIANJlR5Metal Film,1.511,1W, t 5% AN6675AN6680AN6682SVITC4011BP2SC18462SC13282SD6372SD389 J22 r 1 13 12 1 13 12 123456189 1: F BC (B)IItdoesntrotate Runawayoperation Turntabl