JBL GX-A602 Bedienungsanleitung

Service Manual

GX-A602

280-Watt full range car power amplifier

Released EU2014 Harman Consumer Group, Inc. Rev 0, 00/20XX

8500 Balboa Boulevard

Northridge, California 91329

OWNER’S MANUAL 2

TROUBLESHOOTING 7

TECHNICAL SPECIFICATIONS 9

BLOCK DIAGRAM 10

BOM LIST 11

SCHEMATIC DIAGRAMS 18

CONTENTS

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English

ground (gnd) connectIon

Connectawire(minimum10AWG–5.3mm2)

from the amplifier’s GND terminal directly to a

solid point on the vehicle’s chassis.

•Foragoodconnection,usesandpapertoclear

the paint from the metal surface at this chassis

location. Use a star-type lock washer to secure

the wire’s connection.

poWer (12 V) connectIon

1.Connectawire(minimum10AWG–5.3mm2)

directlytothebattery’spositive(+)terminal.

2.Installafuseholderfora50Afuse(GX-A604,

GX-A3001)ora30Afuse(GX-A602)onthis

wirewithin18"(46cm)ofthebattery’s(+)

terminal. Do not install the fuse in the holder

at this time.

3. Route this wire to the amplifier’s location and

connectittotheamplifier’s+12Vterminal.

Be sure to use appropriate grommets

whenever routing wires through the firewall

or other sheet metal. IMPORTANT: Failure

to adequately protect the positive wire from

potential damage may result in a vehicle fire.

4.Whenyouarefinishedroutingandconnecting

this wire, install the appropriate fuse in the

holder you installed near the battery.

(GX-A604,GX-A3001–50Afuse;

GX-A602–30Afuse)

Power

Connectors

Audio System

Head Unit

Chassis Ground

(bare metal)

50 A Fuse (GX-A604/GX-A3001)

30 A Fuse (GX-A602) 18" (46 cm)

Remote Turn-On

(optional)

>#18 AWG (0.82 mm2) Wire

>#10 AWG (5.26 mm2) Wire

usIng the speaker-leVel Inputs

If your source unit doesn’t have line-level outputs you can use the included speaker-level input harness to connect

theamplifiertothesourceunit’sspeakeroutputs.Fromlefttoright,theconductorsare:L+,L–,R–,R+(seethe

illustration to the right). The speaker-level connectors on all GX-series amp models follow this wiring configuration.

Follow the instructions in the previous sections, substituting the speaker-level connectors for the line-level

connectors.

gX-a602 speaker connectIons; 2-channel operatIon

Minimum speaker impedance: 2 ohms (each)

ConnecttheleftandrightspeakerstotheFLandFR(+)and(–)terminals.

Fuse 25A +12V

Speaker

Front Left Speaker Front Right Speaker

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English

gX-a602 Input connectIons: 2-channel operatIon

Connectyoursourceunitorprocessor’slineoutputsasshownintheillustrationbelow.

L+L–R–R+

Line Outputs

Source Unit

See Set The Crossover Controls, onpage20,forinformationaboutsettingtheamplifier’scontrolsfor2-channeloperation.

To use the speaker level inputs instead of the line-level inputs, see Using The Speaker-Level Inputs, on page 12.

gX-a602 speaker connectIons: brIdged operatIon

Bridged operation provides a single high-power channel for a subwoofer

Minimum speaker impedance: 4 ohms

ConnectthesubwoofertotheRL(+)andRR(–)terminals.NOTE: You can connect two 2-ohm subwoofers in series to maintain the required 4-ohm

impedance for bridged operation.

Fuse 25A +12V

Speaker

Subwoofer

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English

gX-a602 Input connectIons: brIdged operatIon

Connectyoursourceunitorprocessor’ssubwooferlineoutputtotheamplifier’sleftinput,asshownintheillustrationbelow.

NOTE: Usea"Y"-adaptertoconnectthesourceunittotheamplifier’sleftandrightinputjacks.

L+L–R–R+

Source Unit

"Y"-Adapter Subwoofer

Output

See Set The Crossover Controls, onpage20,forinformationaboutsettingtheamplifier’scontrolsforbridgedoperation.

To use the speaker-level inputs instead of the line-level inputs, see Using The Speaker-Level Inputs, on page 12.

troubleshootinG

If your amplifier isn’t performing the way you think is should, check to see if the problem is covered in this section before calling your dealer or

contacting JBL customer service.

PROBLEM CAUSES AND SOLUTIONS

Nosound(theamplifier’sPowerLEDisoff) •Checkthattheamplifier’s+12VandGNDconnectionshavebeenproperlymade.

•Checkifthefuseonthe+12Vwirelocatednearthebatteryisblown:Ifso,replaceitwithan

identical fuse.

•Checkallamplifierfuses;ifanyareblown,replacethemwithidenticalfuses.

•Ifyouareusingtheamplifier’sREMconnectionforturn-on,checkthatthewireisproperly

connectedtotheaudiosystem’sremoteturn-onwireortothevehicle’sACCpowerterminal.

Nosound(theamplifier’sPowerLEDisorange) •Checkthatallamplifierinputandspeakerconnectionshavebeenproperlymade.

•Checkthattheamplifier’sLevelcontrolsarenotturnedallthewaydown(counter-clockwise).

•Checkthatthevehicleaudiosystem’ssourceunit’svolumecontrolisnotturnedalltheway

down.

Nosound(theamplifier’sProtectionLEDisred) •Confirmthatthevehicle’selectricalsystemissupplyingbetween9Vand16VDCtothe

amplifier. If the supply voltage is outside of this range, correct the condition before attempting to

use the amplifier.

•Iftheamplifierhasoverheated,waituntilithascooleddownbeforeattemptingtouseitagain.

•Disconnectallspeakersfromtheamplifierandattempttoturnitonagain:

 –Iftheamplifierturnson(thePowerLEDisorange),thereisashortcircuitinoneormoreofthe

speakerwires.Correctallshortcircuitsbeforereconnectingthespeakerstotheamplifier.

 –Iftheamplifierdoesnotturnon(theProtectionLEDisstillredandthePowerLEDisoff),

contact your authorized JBL dealer for assistance.

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English

PROBLEM CAUSES AND SOLUTIONS

Sound only comes from some of the speakers

connected to the amplifier

•Checkthatthevehicleaudiosystem’ssourceunit’sbalanceandfadercontrolsaresettotheir

center (midpoint) positions.

•(GX-A604):Checkthatthesettingoftheamplifier’sModeSwitchmatchestheinputandspeaker

connections made to the amplifier

Sound is too quiet, even with the vehicle audio

system’s source unit volume all the way up

•Checkthattheamplifier’sLevelcontrolsarenotturnedtoolow.SeeSet The Input Level, on

page 22, for information about setting the Level controls.

Sound in the front/rear speakers is distorted •Makesuretheamplifier’sCrossoverFilterswitchforthedistortedchannelsissettoHP.

•SettheCrossovercontrolforthedistortedchannelstoahighersetting.

•Checkthatthedistortionisnotoriginatingfromthevehicleaudiosystem’ssourceunit.

Sound in the subwoofer is distorted •(GX-A604,GX-A602):SettheBassBoostswitchto"OFF".

•(GX-A3001):Whilelisteningtobass-heavymusic,turntheBassBoostcontrolallthewaydown,

and then gradually increase it until the distortion begins to return. Reduce the Bass Boost

control setting slightly to eliminate the distortion and leave it set there.

•Checkthatthedistortionisnotoriginatingfromthevehicleaudiosystem’ssourceunit.

specificAtions

GX-A604 GX-A602 GX-A3001

Maxpower(15.5V,1kHz,10%THD,

total ch, 2 ohms) 435W 280W 415W(15.5V,50Hz,10%THD,

2 ohms)

Rated power output @ 4 ohms 60Wx4 60Wx2 200Wx1

Bridged power output

(4ohms,1%THD) 170Wx2 170Wx1 N/A

THD+Natratedpower <1% <1% <1%

Signal-to-noise(2V@4ohms) >75dB >75dB >75dB

Effective damping factor (4 ohms) >50 >50 >50

Frequency response (–3 dB) 20Hz–20kHz±1dB 20Hz–20kHz±1dB 10Hz–320Hz

Maximuminputvoltage 20V 20V 20V

Maximuminputsensitivity 200mV 200mV 200mV

Fuse size 20Ax2 25A 20Ax2

Dimensions(HxWxD) 2-1/16"x11-13/16"x8-1/8"

(52mmx300mmx206mm) 2-1/16"x7-13/16"x8-1/8"

(52mmx198mmx206mm) 2-1/16"x11-7/16"x8-1/8"

(52mmx291mmx206mm)

Weight 5.3lb(2.4kg) 3.8lb(1.7kg) 5.3lb(2.4kg)

12345678

7654321

powersupply

GROUND

REM

+12V

bassboost

45Hz 0-12dB

power

FUSE

HI-INautoON

GX-A602

PRT

INPUT SENS

0.2V-4V

A1 A2 A3 A4

FLAT

A6 L -out

2Ω/4Ω

Linput

ClassABAudioPowerAmplifier

inputselector

variablecrossover

HIIN

Pitch 2.5mm

bassboost

45Hz 0-12dB

INPUT SENS

0.2V-4V

crossover

80Hz 12dB/ oct

B2 B3

HP/LP pass

FLAT

B6 4R +out

2Ω/4Ω

Rinput

ClassABAudioPowerAmplifier

inputselector

variablecrossover

3 2

7 6

10Hz 80Hz ＞40KHz

crossover

80Hz 12dB/ oct

HP/LP pass

10Hz 80Hz ＞40KHz

JBL GX-A602 BLOCK DIAGRAM

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