Garrard-TA_MK2-tt-sm 电路图 维修手册.pdf

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1、. )l c; FOURSPEED SINGLE RECORDPLAYER . DELTA/MIII .,.,. .*. INSTALLATION OPERATION ANDSERVICE INSTRUCTIONS www.radio-workshop.co.uk RadioFans.CN 收音机爱 好者资料库 CONTENTS DESCRIPTION- OPERATING INSTRUCTIONS INSTALLATION MAINTENANCE SERVICE ADJUSTMENTS SPARE PARTS LIST Paga 2 2 4 5 7 9 TbeGARRARDModelTA/M

2、arkIIfourapeed sinale rec:ord IltayinaunitiJ madeundertbefollowinallateDla:- BrltIIh673852Sweden.144814 741301U.S.A. 2757006 748659AWlualia.157656 SwluertlUld283111200074 www.radio-workshop.co.uk RadioFans.CN 收音机爱 好者资料库 THE GARRARD MODELTA/MARKII FOURSPEED SINGLERECORD PLAYINGUNIT GARRARDRecord Play

3、ing Units are simple and reliableinoperation.Theyarethoroughly tested before leavingourWorks and will give a long period of satisfactory service. Instructions for opera- ting the ModelTA/MarkIIUnit are given in this manual-pleasefollow these instructions carefully. In common with all mechanical devi

4、ces, minor adjustments are sometimesnecessary.TheService Instructions included have been compiled to cover practically all the information necessary to ensure efficient operation. If,after carefully perusing this manual you are still in doubt, our Technical Service Department will gladly assist you.

5、 NOTE. Mentionofthe Model, ScheduleNumberand Typeofpickup head fitted,isdesirable whencom- municating withthecompany. TheScheduleNumberwillbefoundonthe Unit lateundertheTumtable. Address your enquiriesto:- TheGarrardEngineering also keep the turntable surface clean. Avoid touching the music lines, k

6、eep records away fromheatandkeep in container when not required for playing.Donot play chippedorcracked records as they will damage the stylus point. Page Two www.radio-workshop.co.uk SWITCH TURNTABLE. SPINDLE TENSIONSPRINGKNOBFOR fORINTERMEDIATESPEED WHEELHANGE INTERMEOIATE WHEEL TRIPLEVER FORAUTOS

7、TOP View withTurntableRemond Diagram I PageThree KNOBFOR STYLUS PRESSURE ADJUSTMENT HOLE.FOR TRANSITSCREW PICKUPARM REST ADAPTORFOR PLAYING45R.P.M. LARGEHOLE RECORDS www.radio-workshop.co.uk INSTALLATION DIMENSIONS Thecabinet space required for fittingis14tlong and.12tback to front with3clearance ab

8、ove and 21- clearance below the top of the motor board. Where a12record can overlap the cabinet sides, the cabinet space can be reduced to12-!-long bylOt back to front.Sizes given includeiclearance all round to allow the unit to float freely on its spring suspension. up terminalsofthe reproducer in

9、accordance with the reproducer manufacturers instructions.Cutout the motorboardin the cabinet to the template, place the unit in position with the leads through the cut out and press down evenly.Thepatented clip-in spring suspen- sions will push through the three fixing holes andbe retained in posit

10、ion as shown on Diagram3.Adjust- ment tolevel the unitismade byturningeach suspension screw, clockwise tolower and counter clockwise to raise the unit. I 1 TRANSITSCREWS. Two plated wood screws are supplied for use in clamping the unit rigid to the motor board for transit ADM !.t!. PC!l,!P Diagram4

11、purposes.Thesmall fibre washers should be fitted under these screws to prevent marking the unit plate. THESESCREWSMUSTBEREMOVEDBE- FOREUSINGTHEUNIT.Thepositionofthe screws is shown on the templateandDiagram1. Theplug in pickup headisalso retained by a transit screw (Diagram 4) which should be loosen

12、ed to readily remove the head. With aTurnovertype pickup this screw should remain tight. Four CORE Paie FITTINGTOCABINET Having opened the carton, the templateandin- structions will be found lyingontopofthe first liner andunderneathitwillbefoundtheturntable. Asmallenvelopecontainingtwowoodscrews and

13、washers, for transit purposes, and the turntable clip, will be found in one corner of the cartonat the sideofthe second liner. Lift the unit out of the carton and attach a suitable flexible lead for the power supply to the twoterminals in the frontof the terminal block. (Diagram 6).Atthe same time,

14、in- spect the links in the block to ensure that they are set correctly to suit the voltage and frequency of the electrical supply. (Diagram 5). Replace the cover of the terminal block. A lengthofscreened pickup lead should be soldered to the lower soldering tags of the pickup terminal panel as shown

15、 on Diagram2.The other endofthis lead should be attached to the pick- MONAURAL,mSTEREOPHONICLEADS FROM PICKUP www.radio-workshop.co.uk MAINTENANCE Thebearingsinthemotorand intermediate wheel areofthe oil retaining typeandrarely need lubricat- ing.When the need for oil is apparent, remove the turntab

16、le and while holding therubbertyred inter- mediate wheeloutof the way, lubricate themotor and pulley bearings with a light gradeofmachine oil. Carefully remove every trace of oil from the driving surfaces before replacing the turntable. Connect both barslhu. for200/250volts A.C. Connect bars tbus fo

17、r 100/130 volts A.C. pressure under diametrically opposite sides of the rim with the fingers and lifting with a slight twisting motion. FITTINGTURNTABLE. Make sure that the speed change knobisinthe neutralpositiontoreleasethetensiononthe intermediate wheel. 2Place the turntable on its spindleandgent

18、ly revolve it clockwise when it will fall into position. Diagram 5 Terminal BlockaadVoltage ChangeoverLinkCoanectlons VOLTAGEANDFREQUENCY. TheGARRARDModelTA/MarkIIFourSpeed Record Playing Unitissuitable for use on 100/130and 200/250 volts,ateither 40, 50or60 cycles accordingto the motor pulley suppl

19、iedandthe links on the terminal block should be set to the correct positiontocorrespond with the voltageofthe power supply as shown in Diagram5.A motor driving pulley can be suppliedfor 40,50or60 cycle power supply as required. Themotor should be earthed by connecting a lead from the earthing tag lo

20、cated under one of themotor end cover screws, to a good earth connection. Ifthe unitisto be used with a radio setoramplifier havingaUniversal(ACjDC)chassis,orifthe reproducerisa battery set coupledtoa Universal H.T. battery eliminator, itisessential tomakesurethat isolating components (condensersort

21、ransformer)are incorporatedinthe pickup input circuit in the set other- wise the pickup circuit can become live. Should the isolating componentsnotbe included in the set they should be fitted externally in series with TOREMOVETURNTABLE.the pickup leads. Consult your radio dealer if in doubt. Theturn

22、table may be removed by taking off theAlso, the leads from the radio setoramplifier to centreretainingclipandapplyingequalupwardthe pickup should be screened and as short as possible. PageFive Toavoid slip resulting in speed variation, the rubber tyre on the intermediate wheel, turntable rim and mot

23、or pulley must be kept free from oil. www.radio-workshop.co.uk TERMINALSFORCONNECTING POWERSUPPLYALSOLINKSFOR CHANGINGVOLTAGERANGE,UNDERCOVER EARTHINGTAG ONMOTOR VOLTAGEANDFREQUENCY RANGEINDICATEDON MOTORENDCOVER LIFTINGGEAR- FOR,0 SPEEDCHANGE TAGSTRIPFOR PICKUPCONNECTIONCLIPIN SPRINGSUSPENSIONS Und

24、erside View. Diagram 6 PageSix SWITCHCLICK iI/SUPPRESSER HOUSINGFOR TURNTABLE SPINDLE www.radio-workshop.co.uk SERVICEADJUSTMENTS 50cycles. 60 cycles. 40 cycles. These notes are included to help the ownerofthe record player make any minor adjustments that may become necessary. SPEED. Themotoron the

25、ModelTA/MarkIIisdesigned togivethedesiredturntablespeedwithinclose tolerances.Should the turntable run excessively fast orslow, then themotorpulley should be examined to see if itISthe correct one to suit the frequency of the power supply. Themotorpulleyiscolour finished as follows to distinguish th

26、e threetypes:- NICKEL BRASS COPPER SPEED VARIATION. Itisessentialthat the driving surfacesofthe motor pulley, therubberinter-wheel and the turntable rim, shouldbe kept absolutely free from oiland grease. Thisisthe first point which must be checked if the turntable speed variesandthe pulleyandinter-

27、wheel should be cleaned with a dry cloth if oil on the driving surfacesissuspected. MOTORS. If themotorfails to start when the unitisswitched on, firstcheck the power supplyandascertain if currentisreaching themotorterminals.Ifcorrect. switch off the power supply and examine the terminal blockandsee

28、thatthe leads and screwsaretight; also examine the switch contacts which are accessible by removing the cover from the switch. (Diagram I). Clean andadjustifnecessary. Thick oil should not be used to lubricate themotor bearings as it will cause themotorto appear weak or fail to startandit will then

29、be necessary to dis- mantle themotorandclean away all tracesofthe thick oil.Itisessential to lubricate themotorbearings with a good quality thin oil such as sewing machine oil. PICKUP. Two typesofstylus are necessary for playing the different typesofrecords.A stylus having a point radius of .0025isr

30、equired for the standard78r.p.m. (coarse groove) recordsandone with a point radiusof .001formicrogroove (fine groove) records. TheModelTAlMark IIisdesigned to take a variety ofturnover pickup headsorsingle purpose plug-in pickup heads to suit the individual owners require- mentsandcare should be tak

31、entoensurethatthe correct stylusispresented to the record. Turnoverpickup headsarecorrectly set when the speedofthe record to be played appears ontopof theturnoverknob.Ifthere is an arrow on theknob it indicates the direction in which it should be turned when a changeisrequired. Itisrecommendedthatt

32、he styluspressurebe checked periodically with aGarrardStylus Pressure Gauge. Also its useisessential shouldanothertypeof pickup be used otherthanthatsupplied with the unit, as some adjustmentforthe differenceinpickup weight may be required. Thestylus pressure adjusting screwislocated .at the rearoft

33、he pickup arm, andtoadjust the stylus pressure, the knurledknobshould be turnedtogive either an increaseordecrease in spring tension. Page Seven www.radio-workshop.co.uk Themaximum recommended stylus pressurefor all typesofrecordsis10grammes.Should trouble be experienced with the reproduction from a

34、 pickup, the head should be returned for examination to the manufacturer whose nameortrade mark appears on tbe cartridge. Pickup cartridgesmustnotbeopenedorthe manufacturers will disclaim all responsibility. NOTE. A continuity testcannotbe carriedouton crystal pickups withanohmmeter. Should there be

35、 tendency for the pickup to track incorrectly, check the pickup stylus pressureandadjust as explained above if found other than10grammes; also make surethatthe flexible lead to the pickupis not twistedorheld in such manner so as to prevent the free movementofthe pickup arm, and see that the associat

36、ed levers are free. AUTO STOP MECHANISM. Theauto stop mechanism for automatically switch- ing off themotorat the endofa recordisof the velocity type andisofa special design to be very light andsensitive in operation.Itisset to commence operation when the stylus reaches a2tradius.Thestop operates by

37、theautostop lever being raisedbya small cam attached to the turntable spindle when the pickup armruns in on the record run-off-groove.Theautostop lever, on being lifted, trips the catch lever and operates theautostop.Ifthe auto stop fails to operate it may be causedbythe auto stop lever being too lo

38、w and it should be raisedbygiving the auto stop lever adjusting screw (Diagram1)abouthalf a turnina clockwise direction. GARRARDSTYLUS PRESSURE GAUGE MODELSPG2 Page Eight ThisGauge,havingarangeof0to15grammes,providesa simple,accurateand inexpensiveinstrumentformeasuringthe styluspressureofpickupsfor

39、playingMicrogroove(Fine Groove)Records. Theslideoffbase.containingaspiritlevelforcheckingthe leveloftheturntable,shouldbefilledwhen used with arecord changer,this willgivethepressurelabovetheturntable face,thisbeingthemeanreadingferastackofrecordsas used onrecordchangers. Withthebaseremovedthereadin

40、gistakenasnearaspossible totheturntaoletop,thestyluspressurethusbeingmeasured attheequivalentheightofonerecord. TopreventexcessiverecordwearwhenplayingMicrogroove (FineGroove)Records,theturntableshouldbequiteleveland styluspressurenotexceed10grammes. Pretedyourrecordsbymakingaperiodicalcheckofstylus

41、 pressureandadjustincounter-balanceifnecessary.ObtaIn- ablewithorwithoutslideoffbase. EVERYGRAMOPHONEENTHUSIASTANDRADIO SERVICE MAN SHOULD POSSESSONEOFTHESE GAUGES. www.radio-workshop.co.uk SPAREPARTSFORMODELlA/MARKII FOURSPEEDSINGLE RECORD PLAYINGUNIT The Schedule Number printed on the unit plate o

42、f the Record Playing Unitischanged when- evaa non-interchangeable variationisintroduced into the mechanism.Itisdesirable when ordering spare parts to quote the schedule Number of the Record Playing Unit as well as the reference number of the part required. NameofPartRef. No.NameofPartRef.No. Turntab

43、le. .C54409Switch Contact Spring.A41686 Turntable Cover.C54262FeltPadfor Turntable Brake.A45064 Pickup Arm.854520Spring for Support Bracket.A41594 Intermediate Wheel complete with Tyre.853883Spring for Switch Lever .A41503 Motor Pulley (50 cycles).A53953Spring for Catch Lever.A41590 Motor Pulley (60

44、 cycles).A53954Spring for Index Lever.A41506 Motor Pulley (40 cycles).A53955Spring Clip forMotor.A43800 Cover for Terminal 810ck.851161Rotor Spindle withrotor.A54413 Nutfor cover.A41012MPM2 Plug in Pickup Head Moulding.A52225 Cover for Switch.A51327Adaptor for Records with large centre hole A5039I S

45、crew for Cover. .A40343Turntable Clip. A41784 Pickup Arm Counter-balance SpringA41639Pickup Rest complete with pad.A54417 159/9/B.P.PRINTEDINENGLANDBYTHEBOROUGHPRESS(SWINDON)L.TD.EASTCOTTHILL.SWINDON. www.radio-workshop.co.uk cc www.radio-workshop.co.uk PickupConnectingInstructions ThisGarrardUnitis

46、wiredforuse with both MonauralandStereophonic Pickups. Where the pickup moulding (shell) only is supplied,itwill have three leads, makingitsuitable for fitting either a MonauralorStereophonic Pickup Cartridge. As only two leads will be required for a Monaural Cartridge, the Grey lead willnotbe requi

47、red anditshould be tuckedoutofthe way into therearofthe moulding. Use the Brown and the Black lead (Ground)andconnect in accordance with the pickup manufacturers instructions. Theamplifier should be connected to the tags markedR(Brown lead)andC(screen) on the tag strip underneath the unit. the tagCb

48、eing ground. (Brown phono jack leadonU.S.A. type units). Touse a Stereophonic Pickup Cartridge connect the leads in the moulding (shell)tothe cartridge asfollows:- Brown lead Righthandchannel Grey leadLefthandchannel Black leadtothe common terminal. Some Stereophonic cartridges may havefourterminals

49、 and these should be connected accord- ing to the manufacturers instructions. Theamplifierforthe Righthandchannel should be connected to the tags markedR(Brown lead) andC(screen). This is the Brown phono jack lead on U.S.A. type units. Theamplifier for the Lefthandchannel should be connected to the tags markedL(Grey lead) andC(screen). This is the Grey phono jack lead on U.S.A. type units. S