JBL 515 XT, Руководство пользователя

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Section 8: Trouble Shooting
Symptom Likely Cause What to do
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. ‡5HVHDWWKHSRZHUFDEOHDWERWKHQGV
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No sound. Speaker comes on.
Signal source
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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
MIC/ LINE input.
Microphone requires
phantom power
The EON does not supply phantom power. Switch to a dynamic
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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
Excessive BASS or TREBLE
boost
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Signal sounds distorted even at
moderate volumes, LIMIT light
is not lit.
Mixer or other source
is overdriven
Review the Owner’s Manual for your mixer and adjust controls as needed.
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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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your mixer and adjust controls as needed.
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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.
Improper A/C ground or
faulty equipment connected
to mixer input
Disconnect or mute channels one at a time to isolate the problem. Refer to
the owner’s manual of the faulty equipment for troubleshooting help.
Faulty cable between source
equipment and mixer
Substitute a known-good cable for the suspected faulty cable.
Hum or Buzz
Improper A/C grounding, ground
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Excessively long unbalanced
cable run
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to drive your EON speakers.
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output to a balanced output.
Improper system gain structure
Reduce the INPUT level controls and increase the output level of your
source devices.
The inputs from INPUT 1 and
INPUT 2 aren’t coming out of the
OUT connector
MIX/LOOP SWITCH
set improperly
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The speaker connected to the OUT
connector goes up in volume when
I adjust the INPUT 3 control on the
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MIX/LOOP SWITCH
set improperly
Disengage the MIX/LOOP OUT switch, Set to LOOP.