Dual CS 714 Q User manual

CS71

SehrgeehrterKunde,
bitte lesen Sievorderersten InbetriebnahmeIhres neuenGerätesdieseAn-
leitungsorgfältigdurch.SiebewahrensichdadurchvorSchäden,diedurch
falschen Anschluftöderunsachgemäfce Bedienungentstehenkönnen.
Die furdie erstmaligeInbetriebnahmenotwendigen Hinweise, sowie Erläute-
rungenzurBedienung Ihres GerätesfindenSieaufdenSeiten 8—11.
EineGesamtabbildung mit KurzbeschreibungallerBedienungselemente finden
Sieaufdenausklappbaren Umschlagseiten.
Wirwunschen Ihnen nun viel Freudemit IhremDual CS714Q.
Cher ami mélomane;
veuillezlire soigneusement cettenoticeavantla premiéremise enservicede
votreappareilDualafind'éviterdesdommagesquipourraientrésulterd'un
mauvaisbranchementoud'unemanipulationerronée.
Voustrouverezpages12—15desinformationsnécessairespourlapremiére
miseen marche ainsiquedesrenseignementssurle fonctionnement del'ap-
pareil. Voustrouverezuneillustrationde Tappareil ainsi qu'une description
detous leselements de commande sur les pagesdecouverturequisontå
rabattre.
NousvoussouhaitonsbeaucoupdejoieavecvotreappareilDualCS714Q.
Dear customer,
pleasereadthese instructions carefullybeforeyoustartusingyourDualso
thatyou will notencounteranyproblemsresultingfromfaultyconnections
orhandling.
Youshouldreadtheinstructionscarefullybeforeyouoperatetheunit
forthefirst time. Onpages16— 19 youwillfinddetailedinstructionsfor
theoperationofyourunit.Thefirstpageisflappedandyouwillfinda brief
descriptionofallcontrolelements.
HappylisteningwithyourDualCS714Q.
Zeergeachteclient,
leest u voordatu hetapparaatinbedrijfstelteerstdezegebruiksaanwijzing
zorgvuldigdoor.HiermeevoorkomtU schadeaanhetapparaatdooronjuiste
bedieningofdooronjuisteaansluiting.
Devoordeeerstein gebruikname benodigdeaanwijzingenvindtu opde
pagina's20— 23.Eentotaal-overzicht met kortebeschrijvingvanallebe-
dieningselementen vindtu opdeuitklapbarepagina.
Wijwensenu veel pleziermetuwDualCS714Q.
Estimado cliente,
Lea; por favör, estasinstrucciones detenidamente antesderealizarcualquier
operaciön ensuaparato.Conello evitarå posibles danos producidospor
conexionesindebidaso pormanejosimprocedentes.
Lasindicacionesgeneralesparaponeren marcha elaparatoporprimera
vez, asicomoobservacionesparael manejo delmismo,lasencontraräenlas
päginas24— 27.Unavistageneraldelaparatocondefiniciones resumidas
detodoslos elementos de mando laencontraräabriendola höja plegable.
Ledeseamos muchasatisfaciön consunuevoDualCS714Q.
Ettgottråd,
virekommenderarErattnogaläsaigenomdessainstruktionerinnanNibörjar
användaErnyaanläggning så attNidärigenomundvikerattgörafelkopplingar
etcsomkanskadadensamma.
Påsidorna28— 31finnerNienkortfattadbeskrivningavErapparatoch
pådenutvikbarasidanenöversiktsbildmedhänvisningar.
ViönskarErlyckatillmedErnyaDualCS714Q.
Gentiliclienti,
leggeteattentamentequeste istruzioniprimadi mettere in moto perlaprima
volta ilvostronuovoapparecchio.Eviterete cosi deidannicausatidaun col-
legamentoerratoo damanovresbagliate.
Gli avvertimenti perlaprima messa in servizio e lespiegazioniper l'uso del-
Tapparecchio sitrovanoallepagine32—35. NelTinternodella copertina
ripiegabilesonoraffiguratie brevemente descritttituttigli elementi di manov-
ra.
Ci auguriamo cheilDual CS714Qsia pervoisorgentedi molte soddisfazioni.
2
Unter derTelefonnummer
(0 77 24)8 3299istder «Tech-
nischeBeratungsdienst»von
DualfurSiedaundgibtAnt-
wortaufalleFragen zum
Thema HiFi. MontagbisFreitag
von7.30 Uhrbis 16.30Uhr.
Nachts, anWochenendenund
Feiertagen nimmt unserAnruf-
beantworter unter obigerNum-
mer Ihre Fragenentgegen.

- 1
v® m m
91
Fig. 5
Fig. 7
Fig. 8
Fig. 9
Fig. 10

2
3
•5
•6
•7
-8
-9
141312
11
10
Fig. 3 Fig.4

Fig. 1 Fig.2

DieBedienung
(1
(2
(3
(4
(5
(6
(7
(8
(9
(10
(11
(12
(13
(14
(15
(16
(17
(18
(19
(20
Tonarm-BalancegewichtmitTuning-Antiresonator
FeststellschraubefurTonarm-Balancegewicht
Tonarmauflagekraft-Einstellung
Justierschraubefur Tonarmhöhe
Antiskating-Einstellung
Einstellringfur Tonarm-Absenkgeschwindigkeit
Drehknopffur Tonarmaufsetzhilfe
Lifthebel
Tonarmstutze mit Tonarmauflage
SteuertastefurLiftbetätigung
JustierschraubefurTonarm-Aufsetzpunkt
Leuchtstroboskop
Tonarmgriff
Tonabnehmerkopf-Verriegelung
Tonabnehmerkopf(Systemträger)
MotorachsefurSchallplattenzentrierung
Transportsicherungsschraube
Tonhöhenabstimmung fur33 U/min
DrehschalterfurquarzgenaueEinhaltungder
Nenn-Drehzahl
Tonhöhenabstimmungfur45 U/min
Plattenteller-Drehzahleinstellung
Lacommande
(1) Contrepoidsdu bråsavecantirésonateur detuning
(2)Visdeblocageducontrepoidsdu brås
(3) Reglage delaforce d'appui du brås
(4)Vis d'ajustage delahauteurdu brås
(5) Reglage d'antiskating
(6)Baguede reglage delavitessededescentedu brås
(7)Boutonpourauxiliarededescentedu brås
(8)Léve-bras
(9)Supportdu brås avecappui
(10)Touchedecommandepour Tactionnement du
léve-bras
(11) Vis d'ajustage dupointdeposedu brås
(12)Stroboscope lumineux
(13)Poignéedu brås
Verrouillagedelatetedelecture
(14)Tetedelecture (porte-cellule)
(15) Axedu moteur pourlecentragedesdisques
(16) Visdeblocagepourletransport
(17)Syntonisationsonorepour33 tr/mn
(18)Commutateur rotatifpouruneobservation
exactedelavitesse nominale
(19) Syntonisationsonorepour45tr/mn
(20) Reglage delavitesseduplateau
Operation Debediening
(1
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(12;
(13
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(19
(20
Tonearm counterbalance with tuninganti-resonator
Locking screw fortonearmcounterbalance
Styluspressuresetting
Alignment screwfortonearmheight
Anti-skatingsetting
Adjustment ringfortonearmloweringspeed
Turningknobfortonearmloweringaid
Cueingcontrol
Tonearmpostwithtonearmrest
Controlbuttonforliftoperation
Alignmentscrewfortonearmsettingdownpoint
llluminated stroboscope
Tonearmlift
Cartridgeholderlock
Cartridgeholder
Motoraxis forrecordcentering
Transportlockingscrew
Pitchcontrolfor33 rpm
Rotaryswitchforquartz-precisionadheranceto
theratedspeed
Pitchcontrolfor45rpm
Platterspeedsetting
(1]
(2
(3
(4
(5
(6
(7
(8
(9
(10
(11
(12
(13
(14
(15
(16
(17
(18
(19
(20
Toonarmcontragewicht metafstembare Anti-
resonator
Arreteringsschroefvoortoonarmcontragewicht
Toonarmnaaldkrachtinstel I ing
Justeerschroefvoortoonarmhoogte
Antiskating instelling
Instelring voortoonarmliftdaalsnelheid
Draaitoetsvoor toonarmopzethulp
Toonarmlift
Toonarmsteun met-legger
Toonarmliftbedieningstoets
Justeerschroefvoortoonarmopzetpunt
Verlichtestroboscoop
Toonarm handgreep/systeemhouder vergrendeling
Systeemhouder
Motor-asvoor grammofoonplaten centrering
Transportbeveiligingsschroef
Toonhoogte afstemming voor33 t.p.m.
Draaischakelaar voor kwarts-nauwkeurige fixering
vanhetnominaletoerental
Toonhoogteafstemmingvoor45t.p.m.
Plateau-toerental instelling

El manejo
(1)Contrapesodel brazocon antirresonador "Tuning"
(2) Tornillo defijaciönparaelcontrapeso
equilibrador
(3)Ajustedelafuerzadeapoyodelbrazo
(4)Tornillodeajusteparaalturadelbrazo
(5)Ajustedela compensaciön del empuje lateral
(6)Anillodeajusteparalavelocidaddedescenso
delbrazo
(7)Botönparapuntodeapoyosobreeldisco
(8)Dispositivodeelevaciön/descensodelbrazo
(9)Soportedelbrazofonocaptorconpuntodeapoyo
(10)Tecla de mando para accionamiento "lift"
(11) Tornillodeajusteparapuntodedescensodelbrazo
(12)Estroboscopioluminoso
(13) Asidero delbrazo,bloqueocabezalfonocaptor
(14)Cabezalfonocaptor (portacåpsulas)
(15) Ejedelmotorparacentradodediscos
(16)Tornilloaseguradorparaeltransporte
(17) Controldealtura tonal para33 rpm
(18) Conmutadorgiratorioparaajustea precision de
cuarzo del niimeronominal derevoluciones
(19) Ajustedelaalturatonalpara45rpm
(20)Ajustedelniimeroderevolucionesdel plato
giradiscos
Manövrering
(1
(2
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(5
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(7
(8
(9
(10
(11
(12
(13
(14
(15
(16
(17
(18
(19
(20
Motviktmedtuning-antiresonator
Fästskruvförmotvikten
Justeringförnålanliggningskraft
Justeringsskruvför tonarmshöjden
Antiskatinginställning
Justeringsringförlyfthastigheten
Vredförnedläggningshjälp
Tonarmlyft
Tonarmstöd
Tangentförlyftfunktionen
Justeringsskruvförtonarmensnedläggningspunkt
Belyststroboskop
Tonarmsgrepp medlåsfunktionför
monteringsbryggan
Monteringsbrygga
Motoraxelmed centrumstiftfunktion
Transportskruv
Pitch-kontrollför 33v/min(Tonhöjdskontroll)
Omkopplareförstyrningavdennominella
hastigheten
Pitch-kontroll för 45v/min(Tonhöjdskontroll)
Varvtalsomkopplare
Icomandi
(1) Contrappesodelbracciocontuning-antirisonatore
(2)Vitedifissaggiopercontrappesodelbraccio
(3)Regolazione della pressionedilettura
(4)Vitediregolazioneper Taltezza delbraccio
(5)Regolazionedeldispositivoantiskating
(6)Ghieradiregolazioneperlavelocitådidiscesa
delbraccio
(7) Comando delpuntodidiscesa del.braccio
(8)Sollevabraccio
(9)Supportobraccioconappoggio
(10)Levadicomandoperilsollevabraccio
(11) Vitediregolazioneperilpuntod'appoggiodel
braccio
(12)Stroboscopioluminoso
(13)Levettabraccio
Fissaggiotestina
(14)Testina(cartuccia)
(15) Rotoreperilcentraggiodeidischi
(16)Vitedisicurezzaperiltrasporto
(17)Regolazionefinedivelocitåperdischida
33 giri/min.
(18)Manopolarotanteperil mantenimento della
velocitå nominale conprecisionealquarzo
(19)Regolazionefinedivelocitåperdischida
45giri/min.
(20)Regolazionedellavelocitådelpiatto

ENGLISH
Unpackingandsettingup
Please alsoobserve the information contained inthepacking instructions.
Afteropeningtheboxplaceasidethe poly^styrene insertwith
the complete accessories.Removetheconsolewiththeinserted
recordplayerfromtheboxandputtheunitintheplaceinten-
dedforit.Firstofallreadtheinstructionsslipsontheunit
andthenremovetheseafterwardswiththepackingfilms.We
recommend youkeeptheoriginalpackagingincaseyouneed
this låter onforfurthertransport.
Toreleasethetransportlockingscrews(Fig.1) turn thesein
clockwisedirectionuntiltheyslidedownapproximately15 mm
andthentightenthesebyturning them furtherinclockwise
direction. In thisway,therecordplayerisspring mounted in
playingposition(B).
j% iJL"
A ^F B ^P
Nowplacetheplatterdirectlyontothemotoraxis.Remove
thetonearmcounterbalancefromthepolystyreneinsertand
placethe stem ofthecounterbalance,afterreleasingthelocking
screw (2), intotheopeningintendedforthisatthebackend
ofthetonearm.Atthesametime,the triangulär recessonthe
stemshouldpointdownwards(Fig.4).Balancingas well as
settingof stylus pressureandanti-skatingwhichisnowneces-
saryaredescribedin more detailonpage18.
Pleaserefertotheseparatedatasheetforthestyluspressureof
thecartridge al readyinsertedintheunit.
Nowconnecttothereproducing amplifierandplacethe mains
lead intothesocket.Pleasepayattentiontotheseparateinfor-
mationintheseinstructions.
Subsequenttransport
Theplatterliesonthemotoraxisofthe electronic centraldrive
withoutadditionallockingandmustberemovedbeforeeach
transport.Inaddition,thetransportlockingscrewsmustbe
loosenedin anti-clockwise direction,pulledupwardsand
securedbyfurtherturning(A).Thetonearmcounterbalance
shouldberemoved.
Makesurethatthetonearmislockedandthatthestyluspro-
tectionis swivelled downwards.
If youintendtodispatchyourunit,makesurethatthepackaging
is impeccable and,ifpossible,usetheoriginalpackaging.
Connection totheACmains
Theunitcanbeconnectedto alternating current50or60Hz,
110 - 125V or220- 240V andis normally setto230V.
Yourrecordplayercanberunonmainsfrequenciesof50or
60Hzwithoutconversionofthemotor.
Conversionofthemainsvoltageshouldalwaysbecarriedout
byspecialistdealersorauthorized Dual serviceworkshops.
Connectiontothe amplifier
ConnectthecartridgeleadequippedwithRCA(cynch) plugs
tothe phono-magnet inputoftheamplifier(black= rightchan-
nel, white=left channel).Connecttheonewireequippedwith
the cable bracketorscrewitunderthe damp marked"GND"
ontherearoftheamplifier.
Sothatyourreceiverorreproducingamplifierbedesignedfor
DINjacks,haveyourspecialistdealeradaptthisbyreplacing
thecompletecartridge lead.
16
CartridgeleadwithDINjack 1.10 m long.
Order number 207303.
Dualcartridge leads canalsobeequippedfor plug-in intothe
turntable.
Pleasedonotforgettoconnectthechassis lines oftheright
hand(green)andlefthand (blue) tonearmlinestothechassis
oftheunitwhenconvertingthisfromcynch(RCA)toDIN
jacks.
Dust cover
In orderto placethedust coverinposition,turntheunitround
sothatthespecialhingesareinfrontofyouandareeasilyac-
cessible.Firstofallmakesurethattheinsertbracketsonthe
hinges,intowhichthecover will beplaced,areincorrect posi-
tionbeforeyouplacethedustcoverinpositionparalleltothe
bracketsandpushthisin fully.
Inthisposition(opening angle approx.60°)thecovercanalso
beremovedatall times.
Shoulditbenecessarytocorrectthebalancingmoment(elastic
forcewhichkeepsthecoverabovetheconsole),thiscanbe
carriedoutbyturningbothknurledscrews.Pleaseadjustboth
screwsequally. Inmost cases,correctionby half a screwturn
eachwillbe sufficient.
Settingupandoperation
Beforeplayingthefirstrecord,pleaseadjustthepickuparm
return mechanism follows:
1. Releasethepickuparmandraiseitwiththearmliftlever.
2. Swingthearmtothecenteroftheturntable.(Thearmis
returned automatically).
Selectplatterspeed,331/3or45 rpm, thenunlocktonearm,
move stylustipprotectorupwards.
Nowremovetonearmfrompostandswingit över therecord.
Afterthetonearmhasbeenswung över therecordtheturntable
platterautomaticallystartstorotate.Whenthetonearm islifted
fromitspostandplacedbesidethetonearmrest,theplatter
willrotate.Therecordontheplattercanbecleaned(withan
antistatic cloth etc.)whenthetonearmisinthisposition.
Duringthisoperation,attherecorddiameterof30cmor 17 cm
anindex hole isperceptible,thisindicatesthecorrect set-down
pointforthe diamond tothe lead-in grooveoftherecord.
Thisaidforthecorrectsettingofthetonearm maybeswitched
offifthetonearmshouldbeloweredwhena 30cmrecordis
usedatanotherposition,forex.intheareaofa 17cmrecord.
In orderto lower thetonearmtoa specificpositionofthe
record only a light touchoftheguidelever(8)orbypressing
theLIFTbutton(10)isnecessary.
Thecueingliftnowoperatesandthediamondisplacedcare-
fully ontherecord.
Afterplayingtherecordthetonearmwillreturntotherest
andshut-offtheunitautomatically.Thecuecontrolleverwill
returntoitsoriginalposition. It is recommended tolockthe
tonearmandto flap downthestylusprotectionafter play.
If thearmisnotreturnedautomaticallydue,for example, to
an anormality inthelastgrooveofa record,werecommend
thatyoulift the armwiththeliftleverorbypressingtheLIFT
button, andswingitinwardsbyhand.
Interruption ofPlay(Pause)
Placethecueingcontrolin I position.Whenthisisloweredthe
recordcontinuestoptay.Thelastfewnotesplayedbeforethe
pausearerepeated.

Technicalinformation
Cartridgeand stylus
Pleaserefertothe"Informationonyour unit's cartridge",en-
closedwiththeseinstructionsforuse.
Fittinga 1/2"cartridge(seepage3)
With extremelylight ULMcartridges (ultra-low-mass), your
Dual recordplayerdevelopsoutstandingreproductioncapabili-
ties. In this case, the characteristicsof the tonearm areso excel-
lent thatconsiderablyheavier1/2"cartridges also function
underoptimumconditions.Proceedasfollowsifyouwishto
fita 1/2"cartridge.
1)If thereisoneonyour unit, removetheremovalprevention
screw (Fig. 5/"S").
2)Swivelthetonearmlift(13) backwardsand remove the ULM
cartridgefromtheholder(Fig.6).
3) Slide theshortholder plate (Fig.7) approximately 5 mm
backwardsandliftitoff.
4)Placethe long holderplateontothetonearm(Fig.8)in
sucha way,thatitliesonthesurfaceandthebackandis
pointingupwardsatthefrontatan angleof approximately
30°. Shifttheholderplatesothatits large openinglies
abovetheroundguide lug inthetonearm.Nowcarefully
swiveltheholderplateintohorizontalpositionandtightly
pull itforwards until youcan feel itclickingintoposition.
5)Attachthe1/2"cartridgewiththeenclosedaccessoriesto
thecartridgeholder.Thishasbeenfittedcorrectlyifthe
stylus — viewedfromabove — isintheV-shapedrecessof
theenclosedfittingtemplate.Viewedfromtheside,the
stylusmustbeintherectangularrecess(Fig.9).
6)Connectthecartridgeholder'sconnectiontothecartridge.
Theconnectionshave color codes:
redR righthandchannel
greenRGrighthandchannelchassis
blueGLleft handchannelchassis
whiteL lefthandchannel
7)Placethecartridgeholderatan angle frombelowontothe
tonearm head, pressit fully backwardsandupwardsuntil
youcanfeelitclickingintoposition.Nowcarefullyswivel
thetonearmliftforwardsand,ifyou wish, lockthecartridge
andthestylustopreventremovalbyscrewingthedescribed
screw.
8)Dependingon requirements, screwononeorbothofthe
encloseddisk-shapedadditionalweightstotherearofthe
tonearmcounterbalance(1). Tum thesmallerthreadofthe
specialscrewintothethreadofthecounterbalance.Screw
oneadditionalweightontothescrew-withtheknurled
marking ontheoutside — iftheweightofthefittedcartridge
isno more thanapproximately6.5g andasecondoneifit
isheavier.
9)Nowonceagain carefullybalance thetonearm — as described
inthesectionon"Balancingthetonearm".
Fittingcartridgeswithrecess-typecartridge assembly
Cartridgeswitha Dualrecess-typecartridgeassemblycanbe
fitted inthesamewayas 112" cartridges.Thecartridgeholder
(Fig. 10)isdesignedto permit fittingofsuch cartridgeswithout
anadditional attachment screw.
Removalprevention
Thankstoaningeniousdevice,thecartridgeandstyluscanbe
easilysafeguardedagainstunwantedremoval.Forthispurpose,
the self-tapping screwprovidedwiththeaccessoriesisscrewed
intothe hole onthelefthandsideofshiningpinonthe
holderplate(Fig.5).Atthesame time, makesurethatthe
tone-arm lift(13)isverticaltothecartridgeheadcenter.
Stylus
Thestylusissubjectedtonaturalwearandtearduringnormal
playing. Therefore,we recommend youoccasionallycheckthe
stylusand,inthecaseof diamond styli, thisshouldbecarried
outafterapproximately300playinghours.Yourspecialist
dealer will bepleasedtodothisforyoufreeofcharge.Worn
or damaged (splintered)stylichiselthemodulationfromthe
groovesanddestroy records. Therefore, onlyuseasreplacement
thestylustypes recommended inthetechnicaldataofthe
cartridge.Copiedstyliresultinaudiblequalitylossesandin-
creasedwearandtearofrecords.Please remember that,for
physicalreasons,thestylusholderwiththediamondstylusis
extremelyfineandmustthereforebenecessarilysensitiveto
impacts, shocksoruncontrolled movement. In ordertohave
thestyluschecked,takethe complete cartridgeholder(remo-
valfromthetonearm is describedabove)toyourspecialistdealer.
Settingthetuninganti-resonator
YourDualrecordplayerhasa tuninganti-resonatorwhichper-
mits optimumadaptionofthetonearmtothecartridgebeing
used. NotonlyDual U LMcartridgesbutalsoconventional1/2"
cartridgeswitha netweightfrom2 to9 g canbe optimally
adaptedwiththisdevice.FortheULMcartridgefittedinthe
factory,youcanfindthe value tobesetinthedatasheetof
thecartridgewhichisenclosedwiththeseinstructionsforuse.
However,thiscanalsobe determined fromthefollowingdia-
graminthesamewayasfor 112" cartridges.
AstheexampleoftheULM60E shows,youselecttheown
weightofthecartridgeonthehorizontal scale, move vertically
upwardsuntilyoufindthecorresponding line forthe com-
plianceandyouprojectthispointtotheverticalscalefrom
whichyoucanthenreadofftheoptimumtuningvalue.
In ordertosetthetuninganti-resonator, turn thescaleringin
clockwisedirectionuntilyouseethedeterminedscalevalue
abovethepointer(Fig.3).
ThevaluefortheDual ULM 60E is7.8.Itisrecommendedto
carryouttuning settingbeforeinserting thecounterbalanceinto
thetonearm. In thiscase, hold the stemwithonehand andturn
thescalering withtheother.
Note
If youturnthe damping selectorintherangeofthewedge-sha-
pedmarkingtostopposition,thetuninganti-resonatorissafe-
guardedagainsttransport damage.
Adjustment of tuninganti-resonator
% 2,53
30 Comptiance
35
9 Weightofcartridge
17

Compliance of HiFimagnetic and dynamic cartridges
Cartridge
Manufac-
turer
Shure
Ortofon
Audio-
Technica
Typ
V15 III
V15IV
M95ED
SL15Mkl
M20E
M20FL-Su
TK7E
TK14S
AT 13 Ea
AT 15 Sa
AT20SLa
Compli-
ance
32
32
30
20
32
p.20
20
20
25
35
25
Stylus
pressure
[mN]
10
10
12,5
20
10
15
15
15
15
15
15
Cart
Car-
tridge
[gj
6,5
6,3
6,5
7,0
7,0
5,5
6,8
6,2
5,5
6,2
7,6
ridge mäss
Vbunting
hard-
ware
[9]
1,8
1,8
1,8
1,5
1,5
1,2
1,2
1,8
1,8
1,8
1,8
Total
mäss
[g]
8,3
8,1
8,3
8,5
8,5
6,7
8,0
8,0
7,3
8,0
9,4
Balancingthetonearm
Precisetonearmbalancingis important, aboveallforcartridges
witha lowstylus pressure.Thetonearmneed only bebalanced
once. However,itis recommended tocheckthetonearmbalance
from time to time.
Thetonearmisbalancedifit remains ina horizontalposition
whensuspendedfreelyandifitreturnstothishorizontal posi-
tionifpushedupwardsordownwards.
Thetonearmisfirstofallbalanced approximately byshifting
thecounterbalancewiththe stem inthetonearmtubeandthen
exactlybalancedbyturningthefrontknurled wheel onthe
counterbalance(1):
1. Withthetonearmstilllockedtothetonearmpost, tum the
platterafew times byhandinclockwisedirection.
2. Setthestyluspressure(3)andanti-skating(5)to"0".Un-
lock thetonearmandswivelabovethetonearmrest.
3. If thetonearmdoesnotreturntoa horizontalpositionon
itsown,releasethelockingscrew(2)andshiftthecounter-
balancewiththestem until youhavean approximate balan-
ce. Thestemofthecounterbalanceshouldthenbelocked
bytighteningthelockingscrew.
4. Subsequentlybalancethetonearmexactlybyturningthe
frontknurledwheelonthecounterbalance.
5.Setthestyluspressureandanti-skating.
Settingstyluspressure
Eachcartridgerequiresacertainstyluspressurewithwhichop-
timumreproductionisobtained.You willfindthisspecification
forthe fitted cartridgeontheencloseddatasheet.
If thetonearmhasbeenexactlybalanced,thestyluspressure
necessaryforthecartridgeissetbyturningthestyluspressure
scale (3).Thestyluspressurecanbecontinuouslysetwithin
therangefrom0 to20 mN (0- 2 g),wherebythedigitson
thescalerepresentthefollowing.
1= 10mN å 1 g
2= 20 mN A 2 g
Agraduationmarkintherangefrom2-15 mN isanalogousto
this(0.2-1.5 g)1 mN (0.1g).
Theunitworksreliablyfroma styluspressureof2.5 mN
(0.25g)onwards.
Anti-skating
Theskatingforceactinguponeachtonearmleadstoone-sided
wearandtearofthestylusandrecordandcancausedistorted
reproduction.
In ordertobalanceouttheskatingforce, a counterforceexactly
definedwithregardstosizeanddirectionmustbeapplied.The
anti-skatingdevice(5)ofyourHiFirecordplayerfulfillsthis
requirement.
Forstylustypes usual orstandardizednowadays,separate set-
tingscalesareavailablein accordance withtheprintedsymbols:
O Settingforspherical styli.
oSettingforbiradial(elliptical) styli.
CD4 settingforplayingCD4 recordswithCD4 specialcartrid-
ges.
Adjustment oftheanti-skatingdeviceshouldbecarriedout
synchronouslytosettingofthestyluspressure: tum the anti-
skatingdevicetothedigitofthescaleconcerned,whichcor-
respondstotheadjustedstyluspressure.For example, inthe
caseof 10mN(1.0 g)styluspressure alsoplace theanti-skating
rotarybuttoninposition "1".
Theskatingforceisreducedbyapproximately30% inthe
caseof"wet"playing(playingrecords moistened withliquid).
Inthiscase,itisrecommendedtoaccordinglyadapt the setting.
CueControl
Yourunitisequippedwitha shock-freecuecontrolsilicone-
damped inbothdirections.
Thusthetonearmcanbeloweredtoanydesiredpointonthe
record more gentlythanispossiblebyhand.The cue-control
lever(8)hastwopositions:
J tonearmraised
Xtonearmonrecord
Thecuecontrol holds thetonearmabovetherecord,andit
canthereforebe moved toanyposition över therecordwith
completesafety.A light touchonthecue-controllever(8)orby
pressingthe LIFT button(10) to the • positionlowersthetone-
armgently.Thecue-controlreturnstothe Z positionauto-
matically attheendoftherecord.
Atthesametime,theloweringspeedcanbecontinuously
variedwiththeadjustingwheel(6)(Fig.2):
< = slower
<« = faster
Withthecueingcontrolin I position,theheightofthestylus
abovetherecordcanbevariedbyapproximately6 mmbytur-
ningtheadjustingscrew(4).
Pitchcontrol
Eachofthestandardizedspeeds331/3and45 rpm canbe
variedwiththepitchcontrol.
If thepitchswitch(18)isswitchedtoON,thepitchcanbe
varied— separatelyforeachspeed— withintherangeof
±5.5 % withtherotarycontrols(17)and(19).
Contraryto mostquartz-controlled recordplayers,inthecase
ofyour Dual recordplayereachpreselectedspeedinthepitch
rangeisexactlyquartz-exactandPLLcontrolled.
If thepitchswitch(18)is inOFF position,thespeedcorresponds
quartz-exactlytothesetratedspeed,independentlyofhow
therotarycontrols(17)and(19)areset.
Quartz-exact luminous stroboscope
Theprecisestroboscopemarkingontheplatteredgeisflashed
atwitha quartz-exactfrequencyviaanLEDluminouselement
(12). In thisway,theindicationisneitherdependentonthe
mains frequencynordoesitneedseveralstroboscoperingsfor
variousspeedsandmainsfrequencies. It isasexactasa quartz
dock.
If thegraduatedmarking seems to stånd still, bothspeedshave
beensettoquartzprecision.Bymeansofthespeedoftheap-
parentlywanderinggraduationmarking,thespeedselected
withthepitchrotarycontrolcanbe determined withextreme
ecactness:1 mark/seconds correspondtoadeviationof0.9%.
If thegraduated markingseemstobe moving, the speed ishigher
thantherated speed, ifitappearsto move contrarytothedirec-
tionofrotation,thespeedisslowerthantheratedspeed.
18

Switch-offofSet-downAid
This HiFi turntableisfittedwitha set down aidenablingyou
tofindthe correct positionof lead-in groovesforeither 17 cm
or30cmrecords.
Whenthetonearmismovedslowlyinsidea stoplocationis
palpableateach 17 cmor30cmdiameter,indicatingtheexact
set-downpointforthe diamond forthelead-ingrooveofthese
records.
Tochooseanyotherportionoftherecord,theset-downaid
may beswitched off.
Turningknob(7)inv position
Stoplocationforsetdownpointinlead-ingrooves switched on
Turningknob(7)in — position
Stoplocationswitchedoff.
Alignment ofthetonearmsettingdownpoint
Whentheset-downaidisswitchedon(knob(7)inpositionV)
diamond willplace itselfintothecorrectpositionofthe lead-
ingrooveoftherecord. If, inthecaseofasubsequentlyfitted
cartridgefor example, the stylus setsdowntoofarfromthe
run-ingroove,thesettingdownpointofthediamondstylus
canbecorrectedwiththealignmentscrew (11).
If thestylussetsdowntoofarinsideoroutsidetherecord,
turn thealignmentscrewtothe left ortherightaccordingly.
Thesettingiseffectivenot only for 17 cmbutalsofor30cm
records.
Theplatter
The dynamically balanced aluminum diecastplatterliesdirect-
ly onthemotoraxisand,whenplacedinposition,is automati-
cally fixedthroughitsownweight.Additionallockingisnot
necessaryandisalsonotprovidedfor.
Important! Removetheplatterbeforetransportingthe unit!
QuartzcontrolleddirectdriveEDS920
The newly developedquartzcontrolleddirectdriveofthis
Dual HiFirecordplayerisa synthesisofthewellknown Dual
directdrivemotorprincipleanda highlysensitiveelectronic
systemwhichreceivesitsexactnessfroma quartzcrystal.The
drivemotorisa no-collector DCmotor,inthecaseofwhich
the mechanical-electrical switchover (commutation) iscarried
outbytwoHallgenerators,whichrecognizetherespectivepo-
sitionofthe rötor equippedwithan 8-pole annularmagnet
andwhichactivatetherespectivewindingstrandsofthestatic
flat coils. The magnetic returnplatewhichalsorotatesandthe
annularmagnetsurroundtheair-core coilarrangement witha
slightairgapsothatthedriveontheonehandobtainsanex-
tremelysteadyrunningbehaviorwithoutany pole sensitivity
andontheotherhanditobtainsa powerfulstartingtorque
despitethethriftysupplyofenergy.
Af tertheratedspeedhasbeen attained, thismotorneedsless
than50 mW inorderto maintain rotationoftherecordplayer.
Atthesametime,thisextremelylowpowerconsumptionis
proofofthehighlyprecisedesignofthisdriveprincipleand,
ontheother hand, ensuresthatthisHiFirecordplayerisprac-
ticallyabsolutelyfreefrom rumble.
For determination oftheeffectivespeed,themotoriscoupled
witha multipole generatorwhichsuppliesafrequencypropor-
tionaltothespeedwithgreatresolution.Atthesametime,a
highlystablefrequencyisproducedfromthequartzoscillator
viaadividercircuit,whichcorrespondsexactlytothegenerator
frequencyatratedspeed.Bothfrequenciesareapplied toaPLL
switchingcircuitandare compared therewitheachother.Even
iftherecordplayerissubjectedtoanadditional load, for
examplea recordcleaner,theplatterspeed remains absolutely
constantduetothis phase-lockedcoupling ofthecontrol
electronics.
Service
Allthelubricationpointshavesufficient oil. Thus, your unit
willoperate impeccably for many yearsundernormalcondi-
tions. Nevertrytolubricateanyofthelubricationpointsyour-
self. If yourrecordplayershouldeverneedservicing,either
takeittoyourspecialistdealeroraskhimfortheaddressof
thenextauthorizedDualServicingWorkshop.Pleasemake
surethatonlyoriginalDual replacement partsareused.
Shouldtheuniteverbedispatched,makesurethatthisispacked
perfectly,ifpossible,byusingtheoriginalpackaging.
Electrical safety
Theunit complies withtheInternationalSafetyRegulations
forradioandrelateddevices(IEC65).
Technicaldata
Measuredvalues= typicalvalues.
Rumbleandwowandfluttervaluesobtainedwithtestrecord.
CurrenttypeAlternatingcurrent50or60Hz
Mains voltages 110 - 125 V and220- 240V
Drive
QuartzstabilizedelectronicdirectdrivesystemDual EDS 920,
PLL control
Powerconsumption
Approximately 4 W,motorduringplaying< 50 mW
Startingtime
(Until theratedspeedisattained)approximately1.8seconds
at33 rpm
Platter
Non-magnetic, dynamicallybalanced, removable, totalrotating
mass
approximately1.5kg
Platterspeeds
33and45rpm,switched över electronically,quartzstabilized.
PLLtechnology,separatequartz-exact adjustment forboth
speeds,adjustmentrange± 5.5%
Speedcontrol
Quartz-exact, luminous stroboscopewith automatic frequency
switchoverfor33and45rpm
Sensitivity oftheluminousstroboscopefor0.3 % speed deviation
20divisionmarksper minute
Wowandflutter
DIN±0.025%
WRMS ±0.015%
Signal-to-noise ratio(inaccordancewith DIN 45500)
Rumbleunweightedsignal-to-noiseratio55dB
Rumbleweightedsignal-to-noiseratio78dB
Tonearm
Distortion-free "ultra-low-mass", aluminumtubulartonearm
in gimbal 4 pointtipbearing.
Tonearmcounterbalancewithtuninganti-resonator
Effectivetonearmlength221mm
Offset angle240 4'
Tangentialtrackingerror 0.16° /cm
Tonearmbearingfriction
(Referredstylustip)
Vertical 0.07 mN (0.007p)
Styluspressure
Infinitelyvariablefrom0 to20 mN (0-2 g),with1 mN (0.1g)
calibrationintherangefrom2 to 15mN (0.2-1.5g)
Cartridgeholder
Removable, optimally adaptedtoultra-low-masscartridges,
withlongholderplate(intheaccessories)alsosuitablefor
cartridgeswithDualrecess-typecartridge asscmbly andfor
cartridgeswith 112" attachment andanownweightof2 to9 g
(includingattachmentmaterial)
Adjustableoverhang:5 mm
CartridgeSeeseparatedatasheet
19

BLOCKSCHALTBILDBLOCKDIAGRAMSCHEMASYNOPTIQUE
Transformator
Transformer
Transformateur
Gleichrichter
Rectifier
Redresseur
Spannungs-Konstanthalter
VoltageStabilizer
Régulateurdetension
Motor
Motor
Moteur
Frequenz-Generator
Frequency generator
Gönérateurdefréquence
Motor-Trei ber
MotorDriver
MoteurDriver
Sample-andHold-Schaltung
Sample-and-hold circuit
Circuitde contröle avec
mise en memoire
Digital-Analog-Wandler
Digital-Analogconverter
Convertisseurdigital-analogique
Amplituden-Verstärker
AmplitudeAmplifier
Amplificateur d'Amplitude
SchmittTrigger
Schmitt Trigger
SchmittTrigger
Amplituden-Begrenzer
AmplitudeLimiter
Limiteur d'Amplitude
PLL-Schaltung
PLL-Circuit
Circuit-PLL
Quarz-Oszillator
Quarz-oscillator
OszillateurQuartz i Teiler1 : 81
Divider1 : 81
Diviseur1 : 81
ii
Teiler1 : 512
Divider1 : 512
Diviseur1 : 512
Teiler1 : 60
Divider1 : 60
Diviseur1 : 60
Drehzahlumschalter
Speedchangeover
Commutateurdevitesse
Teiler1 : 512
Divider1 : 512
Diviseur1 : 512
Tonhöhenschalter
Pitch switch
Commutateur reglage
delavitesse
Tonhöhen Regler
PitchControl
Reglage findelavitesse
Impuls-Former
Pulse shaper
Modulateur d'impulsion
i
ImpulsDecoder
PulseDecoder
Décodeurå impulsion
Konstant Stromquelle
ConstantCurrentSource
Sourcedecourantconstante
LED-Stroboskop
LED-Strobe
Stroboscopeå LED
247057-4 5/1079
PrintedinGermanyby Dual

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