JBL Pro JBL SRX835P Manuel Du Propriétaire

34

No sound

Speaker not connected  
to active AC power

Verify that speaker is connected and that the circuit is on

Power not switched on

Switch on power and verify that power LED is on

No sound, speaker is connected  
to working AC power but won’t 
come on.

Speaker power cable is faulty  
or improperly connected.

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No sound. Speaker comes on.

Signal source  
(mixer, instrument, etc.)  
is not sending.

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sending an audio signal

Faulty cables and 
connections

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No sound with microphone 
connected directly to the input.

Microphone requires  
phantom power

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microphone, use a battery powered microphone (if possible),  
use an external phantom power supply for condenser type microphones.

Signal sounds distorted and  
very loud, PEAK light is lit  
most of the time.

Excessive input signal, trying  
to exceed the capabilities of  
the speakers

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Signal sounds distorted even at 
moderate volumes, LIMIT light  
is not lit. 

Mixer or other source  
is overdriven

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Start section of this guide.

Lots of hiss in the sound,  
the mixer controls are at  
very low settings.

Improper gain structure

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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 that increases or 
decreases when the mixer level 
controls are moved.

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faulty equipment connected  
to mixer input

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the owner’s manual of the faulty equipment for troubleshooting help.

Faulty cable between source 
equipment and mixer

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Hum or Buzz

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ground loops

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Excessively long  
unbalanced cable run

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output to a balanced output.

Improper system gain 
structure

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source devices.

TROUBLESHOOTING