Dual XPA2500 Průvodce řešením problémů stáhnout pdf (Strana 12)

Dual Electronics Corp.

TollFree:1-866-382-5476

www.dualav.com

NSA0608-V01

XPA SERIES OPERATION

Troubleshooting

Problem Cause Action

Unit will not turn on

(no power LED indicator)

+12Vwirenotconnectedorincorrectvoltage

REMwirenotconnectedorincorrectvoltage

Checkconnectionsforpropervoltage

(11~16VDC)

GNDwirenotconnected Checkconnectiontoground

Fuse(s)blown Replacefuse(s)

Unit has power - LED is

green (but no sound)

Speakerwiresnotconnected Checkconnectionsatspeakers

Volumeturnedallthewaydown Increasevolumelevelatheadunit

Oneormorespeakerwirestouchingeach

other or touching chassis ground

Insulateallbarespeakerwiresfromeach

other and chassis ground

Speaker(s)defectiveordamaged Check/replacespeaker(s)

Inputsignalnotconnected Checkhighorlowlevelinputsforproper

connection

Unit blows fuse(s)

Incorrectfuserating Usefuse(s)withcorrectrating

+12Vwiretouchingchassisground Checkforpinchedwire

Speaker(s)defectiveordamaged Check/replacespeaker(s)

Engine noise

Badgroundconnection Makesureamplifierisgroundedtoclean

bare metal

SignalgroundlooporRFI(radiofrequency

interference)

Re-routeRCAcablesfromexistinghigh

currentwiring

LED illuminates red

(protect mode)

Oneormorespeakerwirestouchingeach

other or touching chassis ground

Insulateallbarespeakerwiresfromeach

other and chassis ground

Speaker(s)defectiveor

damagedinternally(shorted)

Check/replacespeaker(s)

Speakerloadlessthan2ohms(stereo)

Speakerloadlessthan4ohms(bridged)

Adjustspeakerload-amplifierwillnot

operateatlessthan4ohmswhenbridged

Distorted audio output

Incorrectinputsignaltypeor

inputleveltoohigh

Checkconnectionsandreduce/adjustinput

level

Low audio output

Incorrectinputsignaltypeor

inputleveltoolow

Checkconnectionsandincrease/adjust

inputlevel

Weak bass

Speaker(s)arewiredoutofphase Check(+)and(-)speakerconnections

(Observecorrectpolarity)

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