Alto-professional TMX80DFX Manuel d'utilisateur télécharger pdf (Page 6)

6

TROUBLESHOOTING

SYMPTOM

CAUSE

ACTION

No sound from speaker

Signal source (mixer, instrument,

etc) is not sending.

*Check VU meters on the

source mixer;

*Verify that the tape or CD is

playing;

*Use headphones to verify that

the instrument is actually

sending an audio signal

Signal sounds distorted

and very loud; LIMIT

light is lit most of the

time.

Excessive input signal; trying to

exceed the capabilities of the

speakers.

*Reduce the output level of the

source;

*Turn down the level controls

on the speaker;

*Try another pair of speakers

Lots of hiss in the sound,

the mixer controls are

at very low settings.

Improper gain structure.

*Make sure that the MIC/LINE

switch is in the LINE

(disengaged) position;

*Reduce the level settings at

speaker, review the Owner's

Manual for your mixer and

adjust controls as needed;

*Input sensitivity(gain);

*Channel faders;

*Master faders;

Noise or hiss heard at

Output.

Noisy source device.

Disconnect the devices that

are connected to your speaker

one at a time. If the noise goes

away, the problem is with the

source or the connecting

cable.

Hum or Buzz increases or

decreases when the mixer

level controls are moved.

Improper A/C ground or faulty

equipment connected to mixer

input. Faulty cable between

source equipment and mixer.

Disconnect or mute channels

on at a time to isolate the

problem.

Substitute a known good cable

for the suspected faulty cable.

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