GTE 2400 Manuale utente

GTE

AUDIO

COMPONENTS

OPERATING

INSTRUCTIONSFOR

MODEL

2 4 00

INTRODUCTION

Youaretheownerofoneofthemostsophisticated

andversatileaudioinstrumentsonthemarket.To

obtainthefullsoundqualityfromyourstereoreceiver,

itmustbecombinedwithspeakersystemsandother

accessoriesofequallyhighstandards.YourGTE

dealerwillbehappytoadviseyouwhenselecting

accessories.

Beforeoperatingthisreceiver,carefullyreadthe

instructionscontainedinthisbooklet.Itis

recommendedthatthisbookletbekeptwiththe

receiverforfuturereference.

TABLE

OFCONTENTSPage

Introduction

Features

TunerSection3

AmplifierSection3

MuteCircuit3

PhaseQ-4 3

ProtectiveCircuits3

Stereo

System

SetUp4

Speaker

System

Connection

Antenna

Connections

Power

Source

Component

Connections

Front

Panel8

Sound

System

Operation

Aux10

AMReception10

FMReception10

Phono10

Microphone10

TapePlay10

TapeRecording10

RecordingTape

ontoTape2 10

Specifications

Care

Cabinet

Consumer

Relations

WARNING:

TOAVOIDPOSSIBLEFIREORSHOCK

HAZARD,

NEVEREXPOSETHIS

UNITTORAINORMOISTURE.IFSUCHEXPOSUREOCCURS,REMOVETHEPLUG

FROMTHEELECTRICALOUTLETANDHAVETHEEXPOSEDUNITCHECKEDBYA

COMPETENTSERVICETECHNICIAN.

TUNERSECTION

•FMFrontEndusesa FETina groundedgate

configurationlorexcellentsensitivityandsuperb

overloadrejection

•PLLstereomultiplexcircuitryusinganintegrated

circuittorlowdistortionandhighstabilityproviding

excellentstereoseparationoverlongtermuse.

•IFamplifiersectionutilizesceramicfilterswhich

provideexcellentimageandalternatechannel

rejection.

•Centertuneandsignalstrengthmetersmake

possibleoutstandingtuningaccuracy.

AMPLIFIER

SECTION

•Direct-coupledOCLcircuitryutilizinginput

dif-

ferentialmatchedtransistorpairsthroughtothe

complimentaryoutputtransistorsBecausethe

OCLcircuitryhasnooutputcapacitor,thepower

bandwidthinthelowfrequenciesisextended

beyondaudibility,providingmaximumlowfre-

quencyperformanceandexcellentdampening

characteristicsThecomplimentaryPNP-NPN

outputstagesalsoreducessignificantlythehigher

orderharmonicdistortionproducts,resultingin

cleanhighfrequencyreproduction.

•TonecontrolsutilizeBaxandallfeedbackcutboost

circuitryforpreciseadjustmentofbassandtreble

frequencies

•Phonopre-ampdistortionandnoisearekepttoa

minimumbyusinglownoisehighgaindevicesina

2stageDarlingtonpre-ampdesign.

MUTECIRCUIT

Thisreceiverincorporatesa FETaudiomutecircuit

whichisactivatedbytheFunctionButtonsandwhen

thereceiveristurnedonandoff.Attenuationofthe

audiosignalpreventsannoyingclicksandpops.

PHASEQ-4STEREO

Nowyoucanexperiencetotaldimensionalsound

.. .soundfromeverycorneroftheroom.TheGTE

PhaseQ-4matrixsystem,withfourspeakersinthe

sameroom,givestheeffectoffour-channelsound.In

almostanylivelisteningsituation,youhearsounds

froma numberofdirections.Soundfromthefrontfor

example,isreflectedoffrearandsidewalls.GTE's

PhaseQ-4approximatesa livelisteningsituation,

givingyoua newdimensioninstereosound.This

remarkableeffectisachievedwiththespeakersinthe

positionsindicatedinthediagram.Noticetherear

speakersareclosertothelistenerthanthemain

speakers.Thisarrangementcompensatesfora

slightlyloweraudiolevelfromtherearspeakers.

NOTE:

Thissystemisdesignedtooperatewithstereo

orfour-channelmatrixprogrammaterialonly.When

listeningtomonauralprogramming,thePQ-4

speakersshouldbeturnedOFF.

PROTECTIVECIRCUITS

Yourreceiverincorporatesfourprotectivesystemsto

guardagainstabnormaloperatingconditionsthat

couldcausedamagetothereceiverorspeakers.

Electronic

Current

Limiting

Protectstheamplifierfromimproperlyconnected

speakers.Iftheoutputisshortedorexcessively

loaded,

theamplifierwillautomaticallylimitthe

outputsignaltosafelevels.

•

Thermal

Switch

Willshutoffthepowersupplytotheamplifier

sectioniftheinternaltemperaturebecomes

excessive.Theunitwillautomaticallycomeback

onwhenithascooled

•AC

Power

Overload

Protection

Thisprotectionisprovidedbya FUSEwhichwill

shutoffyourreceiverincaseofanACpower

overload

Electronic

Speaker

Protection

Providesspeakerprotectionincaseofcomponent

failureinthepoweramplifier.Thiselectronic

circuitwilldetectanyabnormalDCvoltageatthe

speakerterminalsandwillautomaticallyshutdown

thepoweramplifiersection.Normalsignalpower

capabilityoftheamplifierisnotimpairedbythis

circuit.

Ifallspeakersautomaticallyshutoffwhilethedial

remainslighted,turnyoursetOFF.Waitfor1

minuteandthenturnthesetbackON.Ifthe

speakersoperatemomentarilyandagainauto-

maticallyshutoff,unplugthesetfromtheelectrical

outletandconsultyourGTEdealer.

FEATURES

STEREOSYSTEMSETUP

•Wheninstallingandduringtheoperationofthis

receiver,caremustbetakennottocloseoffthe

ventarealocatedonthetopofthereceiver.One

inchminimumclearanceisrecommendedforsafe

andreliableperformance.

•Placementofyourspeakersystemswillvarywith

roomsize,acoustics,andpersonalpreference.

Thefollowinginformationwillassistyouinthefinal

placementofyourspeakersystems.

Generally,thespeakersystemsshouldbeplaced

atapproximatelyearlevelheight,andspacedat

leastsixtoeightfeetapart.Asthedistance

betweenspeakersystemsincreases,thestereo

separationbecomesmorepronounced.

Whenwiderspacingisused,anglethespeaker

systemsslightlysothattheprincipallisteningarea

intheroomiscovered.

•Witha highpowerstereosystem,improper

placementoftheturntablecanresultinacoustic

feedback(arumblingorhowlingsound).Acoustic

feedbackiscausedbyvibrationsfromtheloud

speakersreachingtheturntableandbeingre-

amplified.

Placingtheturntableona sturdyshelforcabinet,

andnotonorclosetoa speakercabinetwillreduce

theoccurenceoffeedback.

SPEAKER

SYSTEMCONNECTION

Threesetsofspeakerterminals(A,B & PQ-4)are

providedonthereceiverwhichallowthe

connectionofthreesetsofspeakers.Useno

smallerthan18gaugewiretoconnectspeakersto

outputterminals.Alwaysbesurepositiveand

negativeoutputsareconnectedtocorresponding

positiveandnegativeterminalsonthespeakers.

CAUTION:

BECAREFULTHATTHEWIRESDO

NOT"SHORT"EACHOTHEROUTATTHE

SPEAKERTERMINALS.

HelpfulHint:Mostlampcordor"ZIP"cordhasa

moldedridgealongonesidetoidentifypolarity.

Seeillustrationbelow.

•Speakerswitchesareconvenientlylocatedonthe

frontofthereceiversothatyoucanchangefrom

onespeakersystemtoanotherwithoutdiscon-

nectingandre-connectingaccessoryspeakers.

•Youcanlistenprivatelytoyourfavoritestereo

musicbypluggingaccessoryheadphonesintothe

built-instereophonejack.

Forrear(PQ-4)speakerstooperate,SystemA

SpeakerswitchandPQ-4switch(locatedonthe

rearofthereceiver)mustbeintheONposition.

HelpfulHint:WhenusingthePhaseQ-4matrix

system,

itisrecommendedthatfrontspeakersbe

connectedtoSPEAKERB terminalsandrear

speakerstoPQ-4terminals.Withspeakers

connectedinthismanner,youcanturnrear

speakersoffsimplybyswitchingSYSTEMA

SpeakerswitchOFF.

Whenremotespeakersareused,itisrecom-

mendedthatfrontspeakersbeconnectedto

SPEAKERA terminals,rearspeakerstoPQ-4

terminalsandremotespeakerstoSPEAKERB

terminals.Withspeakersconnectedinthis

manner,rearspeakerscanbeturnedoffbysliding

PQ-4switchOFF.

CAUTION:

CONNECTONLYSPEAKERSWHICH

ARE

RECOMMENDEDFORUSEWITH

AMPLI-

FIERSRATEDAT55WATTSORHIGHER.USE

OFSPEAKERSRECOMMENDEDFOR

AMPLI-

FIERSRATEDATLESSTHAN55WATTSMAY

RESULTINPERMANENTDAMAGETOTHE

SPEAKERS

ANDTHERECEIVERIFPLAYEDAT

HIGH

LEVELS.

ANTENNACONNECTION

•SlideferriterodAMantennaassembly(contained

inseparatebag)intoholderandplug-inconnector.

AnExternalLongLineAMAntennamaybe

attachedbyconnectinglead-inwirefromantenna

torightAMANTENNAterminalandconnecting

ground(left)terminaltoa goodearthground,such

asa waterpipe.

NOTE:

TheAMferriterodmustremainattached

forproperoperation.

FMANTENNACONNECTIONS

•ConnectleadsfromtheFMdipoleantenna

(suppliedwithreceiver)tothe300OHMFM

ANTENNAterminals.

Toattacha 300OhmExternalFMAntenna,

connecttheleadsfromtheantennatothe300

OHMFMANTENNAterminals.

Ifa 75OhmExternalFMAntennaistobeused,

connectthecoaxialcabletothe75OHMFM

ANTENNAjack

NOTE:

UseonlyoneFMantennaeither75ohm

or300ohmatanyonetime

POWERSOURCE

Afterconnectingallcomponentstothereceiver,plug

inAClinecordtoa 120Volt,60Hertz(cycle)

alternatingcurrect(AC)only.Neverconnectthe

receivertoanelectricaloutlethavinga different

frequencyorvoltage.Permanentdamagetoyour

systemmayresult.

Note:

Ifyourreceiverwillnotoperateoritsuddenly

goesoff,checkfuse.Iffusehasburnedoutreplace

withfusehavingsameamperagerating.If

replacementfusealsoburnsout,consultyour

authorizedGTEdealer.

ANTENNA

CONNECTIONS

OUTDOOR

ANTENNA

COMPONENT

NOTE:

Makeallantennaandcomponent

connectionsbeforeturningpowerON

PHONO

JACKS

Thetwophonoinputsallowfortheuseoftwo

turntables.

•SelecteitherthePHONOONEorTWOjacksand

plugturntablecablesintotheappropriateleftand

rightjacks.ConnectgroundwireunderPHONO

GROUNDterminal( V ).

•PHONOONEinputimpedancemaybeselectedfor

47kohm

aswellas100kohm.Checkcartridge

specificationsforimpedancevalue.

SlidePHONOONEswitchtoappropriateinput

impedance.PHONOTWOinputimpedanceis

47kohm

only.

AUX

JACKS

Plugtheoutputofaccessoryequipmentintotheap-

propriateleftandrightjacks.Typicalaccessoriesare:

•8-track,cassette,orreeltoreeltapeplaydeck.

•Microphoneormusicalinstrumentwithpre-

amplifier.

TAPE

JACKS

Thetwosetsoftapejacksallowfortheuseoftwo

tapedecks.

Record

•ConnecttherecordLINEINPUTjacksofthetape

decktotheTAPEONE(orTWO)RECORDjacks.

Play

•ConnecttheplaybackLINEOUTPUTjacksofthe

tapedecktotheTAPEONE(orTWO)PLAY.

PRE-AMP

Thepre-amplifiersignalsarerelayedfromthe

PRE-AMPjackstothe-AMPjacksbytheuseof

jumpers.Thesejumpersmaybereplacedwith

accessoryequipmentsuchas:

•EnvironmentalEqualizer— toshapefrequency

responsetosuitroomacoustics.

CONNECTIONS

•SlavePowerAmplifier— todrivemultiplespeaker

systems.

•CrossoverNetworkanda SlavePowerAmplifier—

toconvertreceivertobi-ampoperation.

CAUTION:

REMOVINGJUMPERSWITHPOWER

ONMAYRESULTINPERMANENTDAMAGETO

SPEAKERS

ANDRECEIVER.

Toconnectanenvironmentalequalizer:

•TurnpowerOFF.

•Removejumpers.

•PlugcablesfromPRE-AMPjackstoenvironmental

equalizerinputjacks.

•PlugcablesfromAMPjackstoenvironmental

equalizeroutputjacks.

•Checkchannelconnectionsforproperhook-up

beforeturningpowerON.

Toconnecta slavepoweramplifier:

•TurnpowerOFF.

•Removejumpers.

•Usinga commerciallyavailable"Y"connector,

connectleftchannel(L)PRE-AMPandAMPjacks

toleftchannel(L)slaveamplifierjack.

•Repeatabovesteptoconnectrightchannel.

•Checkchannelconnectionsforproperhook-up

beforeturningpowerON.

NOTE:

Youwillbeabletocontroltheslaveamplifier

throughthereceiverVOLUME,BALANCEandTONE

controls.

Toconnecta crossovernetworkanda slavepower

amplifier:

•TurnpowerOFF.

•Removejumpers.

•Plugcablefromleft(L)PRE-AMPjacktoleft

crossovernetworkinputjack.

•Plugcablefromleftchannellow-frequencysection

ofcrossovernetworktoleftchanneljackof

amplifierhavinghigherpowerrating.

•Plugcablefromleftchannelhigh-frequency

sectionofcrossovernetworktoleftchanneljackof

amplifierhavinglowerpowerrating.

•Repeatabovestepstoconnectrightchannel.

•Checkchannelconnectionsforproperhook-up

beforeturningpowerON.

NOTE:

Whenusinga crossovernetworkanda slave

poweramplifierforbi-ampoperation,youwillbeable

toutilizeboththereceiveramplifierandslave

amplifier;andbeabletocontrolboththroughthe

receiverVOLUME,BALANCEandTONEcontrols.

UNSWITCHEDACOUTLETS

Plugaccessorycomponentssuchasturntablesor

tapedecksintotheseoutlets.Theoutletsremainon

whenthereceiverpowerswitchisturnedoff.

SWITCHEDACOUTLET

Plugassociatedelectroniccomponentssuchasan

environmentalequalizerorslaveamplifierintothis

outlet.Thisoutletwillbeoffwhenthereceiverpower

isoff.

NOTE:

Donotusethisoutletforturntables,tape

decksorothermotordrivenaccessories.

WARNING:

TOAVOIDA POSSIBLESHOCK

HAZARD,

DONOTCONNECTANYACCESSORY

WHICHDOESNOTHAVEA MANUFACTURER

SUPPLIEDAUDIOOUTPUT

JACK.

FRONT

DIAL—

INDICATESFMSTATIONFREQUENCIES

88TO108MHz

DIAL

— INDICATESAMSTATION

FREQUENCIES520TO1630kHz.

FMMPXINDICATOR—LIGHTGLOWSWHENYOU

HAVETUNEDINA STEREOBROADCAST.

NOTE:

INDICATORWILLNOTLIGHTWHENMONO

BUTTONISDEPRESSEDEVENIFTUNEDTO

STEREOBROADCAST

FMTUNINGMETER— INDICATESBESTFM

TUNINGWHENPOINTERISCENTERED.

SIGNAL-STRENGTHMETER— INDICATESBEST

AMANDFMRECEPTIONWHENPOINTERISASFAR

RIGHTASPOSSIBLE.ITISALSOUSEFULFOR

ORIENTINGANTENNAFOROPTIMUMSIGNAL

STRENGTHONFM.

MIC

JACK

— FORMICROPHONEORMUSICAL

INSTRUMENTINPUT.

POWER— TOTURNRECEIVERONANDOFF.

PHONES

JACK

— TOPLUGINSTEREOHEAD-

PHONES.

SYSTEMA SPEAKERSWITCH— TOSELECT

SYSTEMA ANDPO-4SPEAKERSYSTEMS

SYSTEMB SPEAKERSWITCH— TOSELECT

SYSTEMB SPEAKERSYSTEM.

TREBLE—

TOCUTORBOOSTHIGHFREQUENCY

TONESSUCHASFLUTESORVIOLINS

BASS

— TOCUTORBOOSTLOWFREQUENCY

TONES,

SUCHASKETTLEDRUMSORORGAN

PEDALNOTES.

BALANCE

—TOADJUSTFOREQUALLEVELFROM

LEFTANDRIGHTSPEAKERS,TURNKNOB

CLOCKWISETOREDUCELEVELINLEFTCHANNEL.

COUNTERCLOCKWISETOREDUCELEVELINRIGHT

CHANNEL.

PANEL

LOG

SCALE—QUICKREFERENCETUNINGGUIDE

THATPROVIDESLOGSCALEREFERENCENUM-

BERSWHICHCANBEUSEDTORELOCATE

FAVORITESTATIONS.

TUNING—TOSELECTAM& FMSTATIONS.

MONO— ENGAGESSYSTEMFORMONAURAL

SOURCES.ITALSOSWITCHESFMTUNERTO

MONO;

THISWILLREDUCETHENOISEONWEAK

FMSTEREOSTATIONS

LOUDNESS—TOINCREASEBASSFREQUENCIES

FORPROPERTONALBALANCEATLOWLISTENING

LEVELS.

FM— TOENGAGESYSTEMFORFMRECEPTION.

FMMUTE— ELIMINATESINTERSTATIONNOISE

ANDWEAKNOISYFMSTATIONS.PUSHTOMUTE.

SHOULDYOUWISHTOSEARCHFORORLISTEN

TOWEAKSIGNALSTATIONSRELEASEMUTE

BUTTON.

— TOENGAGESYSTEMFORAMRECEPTION.

AUX

— TOENGAGESYSTEMFORAUXILIARY

COMPONENTS.

HIGHANDLOWFILTERS— HIGHFILTERRE-

DUCESHIGHFREQUENCYTAPEHISS,RECORD

SCRATCHNOISEANDCUTSOFFFREQUENCIES

ABOVE10kHz.LOWFILTERREDUCESTURNTABLE

RUMBLEANDACOUSTICALFEEDBACK.

PHONOONEORTWO— TOENGAGESYSTEM

FORPHONOGRAPHPLAY.

MIC— TOENGAGESYSTEMFORMICROPHONE

USE.

TAPE

ONEANDTWO—TOENGAGESYSTEMFOR

ACCESSORYTAPEPLAYORTAPEMONITORING.

NOTE:

TAPEBUTTONSMUSTBERELEASED

FORFM,AM,PHONO,MIC,ORAUX

FUNCTIONS.

VOLUME—TOADJUSTAUDIOLEVEL,TURNKNOB

CLOCKWISETOINCREASEVOLUME.

NOTE:

ALWAYSSETVOLUMETOMIN"0"

POSITIONBEFORETURNINGONRE-

CEIVER.

SOUNDSYSTEMOPERATION

BeforeturningthepowerON,setcontrolsand

switchesasfollows:

•VOLUMEcontroltoMINposition.

•TREBLE,BASS,andBALANCEcontrolstocenter

(0)

position.

•SwitchappropriatespeakersystemON.See

"SpeakerSystemConnection."

•TAPEONEandTWObuttonstoOFF(unpushed)

position.

AUX

•Connectaccessoryunittorearofreceiver.See

"ComponentConnections".

•DepressAUXbutton.

•AdjustTREBLE,BASSandVOLUMEcontrolsfor

preferredloudnessandtone.

RECEPTION

•DepressAMbutton.

•RotateTUNINGcontroltoselectdesiredstationas

indicatedonAM

dial.

Receptionisoptimumwhen

pointeronSIGNAL-STRENGTHMETERisasfarto

rightaspossible.

•AdjustTREBLE,BASSandVOLUMEcontrolsfor

preferredloudnessandtone.

FMRECEPTION

•DepressFMbutton.

•RotateTUNINGcontroltoselectdesiredstationas

indicatedonFM

dial.

Receptionisoptimumwhen

pointerofFMTUNINGMETERiscenteredand

SIGNAL-STRENGTHMETERisasfartotherightas

possible.

•AdjustTREBLE,BASSandVOLUMEcontrolsfor

preferredloudnessandtone.

PHONO

•Connectturntabletorearofreceiver.See

"ComponentConnections".

•DepressappropriatePHONObutton.

•Whenplayingmonauralrecords,depressMONO

button.

•AdjustTREBLE,BASSandVOLUMEcontrolsfor

preferredloudnessandtone.

•Foradditionalinformationrefertoinstructions

suppliedwithyourturntable.

MICROPHONE

•Connectthemicrophoneormusicalinstrumentto

MICjack.Useeithera monoorstereotypephone

plug(SeeNote).

•DepressMONOpushbuttonifmonotypephone

plugisused.

•DepressbothPHONOONEandTWObuttons.Both

buttonsmustbedepressedtoselectthe

microphoneinput.

NOTE:

Themicrophonejackusedonthisreceiverisa

3circuittypesimilartoa stereoheadphone

jack.Touse(2)stereomicrophones,a

commerciallyavailable"Y"adaptershouldbe

used.

TAPE

PLAY

•ConnecttapeequipmenttoTAPEPLAYjackson

rearofreceiver.See"ComponentConnections".

•DepressappropriateTAPEbutton.

•AdjustTREBLE,BASSandVOLUMEcontrolsfor

preferredloudnessandtone.

•Foradditionalinformationconsulttheinstructions

suppliedwithyourtapedeck.

TAPE

RECORDING

•ConnecttapeequipmenttoTAPERECORDjacks

onrearofreceiver.See"Component

Con-

nections".

•Selectprogramsourceasdescribedunder

sectionsAUX,AM,FM,PHONOorMICROPHONE.

Theprogramsourcesignalisalwayspresentatthe

TAPEONE(andTWO)RECORDjacksallowing

simultaneousrecordingofsignalsources.Signal

sourceisnotaffectedbythesettingsofthe

TREBLE,BASS,VOLUMEorBALANCEcontrols.

•Ifthetapedeckisa 3-headtupeequippedwitha

tapemonitorfunction,therecordingcanbe

monitoredbydepressingtheappropriateTAPE

button.

BoththePLAYandRECORDjacksmustbe

connectedtothetapedeck.Seeillustrationon

page11.

•Foradditionalinformationconsulttheinstructions

suppliedwithyourtapedeck.

RECORDINGTAPE1 ONTOTAPE2

•Connecttapedeck1 toTAPEONEjacksand

connecttapedeck2 toTAPETWOjacks.

•DepressTAPEONEbutton.

•A tapeplayedontapedeck1 cannowberecorded

ontapedeck2.

•Iftapedeck2 isa 3-headtypeequippedwitha

monitorfunction,pushtheTAPETWObuttonto

monitortherecording.SeeIllustrationonpage11.

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