Electro-Voice ZLX-12P Manual Do Proprietário
Troubleshooting
Problem
Possible Cause(s)
Action
1.
No sound
Amplifier
Connect a known working test loudspeaker to the
amplifier outputs. If there is no sound, verify all the
electronics are on, the signal routing is correct, the
source is active; the volume is turned up, etc.
Correct/repair/replace as necessary. If there is sound,
the problem is wiring.
amplifier outputs. If there is no sound, verify all the
electronics are on, the signal routing is correct, the
source is active; the volume is turned up, etc.
Correct/repair/replace as necessary. If there is sound,
the problem is wiring.
Wiring
Verify you have connected the correct cables to the
amplifier. Play something at a low level through the
amplifier. Connect the 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.
amplifier. Play something at a low level through the
amplifier. Connect the 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.
2.
Poor Low-
Frequency
Response
Frequency
Response
With SUB menu
cross-over frequency
activated
cross-over frequency
activated
If no subwoofers are used with the system, select the
OFF position.
OFF position.
3.
Intermittent output
such as cracking or
distortion
such as cracking or
distortion
Faulty connection
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.
ensure they are all clean and tight. If the problem
persists, check the wiring. See problem 1.
4.
Constant noise
such as buzzing,
hissing or humming
such as buzzing,
hissing or humming
Defective source or
other electronic
device
other electronic
device
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.
evaluate each component as necessary to isolate the
problem. Most likely there is a break in the signal path.
Poor system
grounding or ground
loop
grounding or ground
loop
Check and correct the system grounding, as required.
Input gain knob is
not in the MIC
position
not in the MIC
position
Slowly increase the input gain knob level to engage the
microphone pre-amp.
microphone pre-amp.
5.
No sound produced
with microphone
connected to INPUT
1 or INPUT 2
with microphone
connected to INPUT
1 or INPUT 2
Microphone requires
phantom power.
phantom power.
Use a dynamic microphone that does not require
phantom power. If using a microphone requiring
phantom power, an external phantom power source is
needed
phantom power. If using a microphone requiring
phantom power, an external phantom power source is
needed
Input gain knob is
not in the MIC
position
not in the MIC
position
Slowly increase the input gain knob level to engage the
microphone pre-amp.
microphone pre-amp.
6.
Sound is distorted
front LED is OFF,
LCD screen LIMIT is
ON
front LED is OFF,
LCD screen LIMIT is
ON
Excessive input level Reduce the input level or loudspeaker level knobs to
prevent limit.
7
en
27
Electro-Voice
User Manual
2015.12 | 02 | F.01U.319.253