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EVOLVE Portable Column Loudspeaker
9
Troubleshooting
Problem
1.
2.
3.
4.
5.
Electro-Voice
Possible cause
No sound
Amplifier
Wiring
Intermittent
Faulty connection
output such as
crackling or
distortion
Constant noise
Defective source or
such as
other electronic
buzzing hissing
device
or humming
Poor system
grounding or ground
loop
No sound
Microphone requires
produced with
phantom power.
microphone
connected to
Input channel is
INPUTS 1-4
muted or LEVEL is too
low.
Sound is
Excessive input level
distorted front
LED is OFF,
Incorrect gain
LCD screen
structure or source
LIMIT is ON
input (mixing console/
preamp) is overdriven
Action
Verify all the electronics are on, the signal
routing is correct, the source is active; the
volume is turned up, no channels are muted,
etc.
Correct/repair/replace as necessary. If there is
still no sound, the problem may be wiring.
Verify you have connected the correct cables to
the amplifier. Play something at a low level
through the amplifier. Connect a test
loudspeaker in parallel with the malfunctioning
line. If the sound level is gone or is very weak,
the line has a short in it (possibly a severe
scrape, pinch, or a missed connection). Using
the test loudspeaker, move down the line and
test each connection/junction until you find the
problem and correct it. Observe proper
polarity.
Check all connections at amplifier and
loudspeakers to ensure they are all clean and
tight. If the problem persists, check the wiring.
See problem 1.
If noise is present, but no program material is
playing, evaluate each component as necessary
to isolate the problem. Most likely there is a
break in the signal path.
Check and correct the system grounding, as
required.
Ensure the microphone is connected to INPUTS
1-4. Phantom power is not available on INPUT
5/6.
Select the channel and verify the channel is not
muted. If it is not muted, slowly increase the
channel LEVEL until sound is produced.
Reduce the input level or loudspeaker level to
prevent limit.
Verify level controls of the source are properly
structured by using the VU meter indicator on
the LCD screen. If the VU meter bar is solid or
the system indicates CLIP or LIMIT, the input or
source level is too high.
User manual
Troubleshooting | en
37
2020-12 | v01 | F.01U.393.750
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