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18
en | Troubleshooting
6
Troubleshooting
Problem
1.
No sound
2.
Poor
Low-Frequency
Response
3.
Intermittent output
such as cracking or
distortion
4.
Constant noise
such as buzzing,
hissing or humming
If these suggestions do not solve your problem, contact your nearest Electro-Voice dealer or
Electro-Voice distributor.
2019-04 | 02 | F.01U.326.890
Possible Cause(s)
Action
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 in the 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.
Loudspeakers wired
When two loudspeakers are connected out of polarity,
out-of-polarity
the low frequencies will cancel each other acoustically.
Carefully observe the wire markings or tracers on your
loudspeaker wires. Verify the amplifier (+) terminal is
connected to pin 1+ of the NL4 connector and the
amplifier (-) terminal is connected to pin 1-of the NL4
connector.
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.
Defective source or
If noise is present, but no program material is playing,
other electronic
evaluate each component as necessary to isolate the
device
problem. Most likely there is a break in the signal path.
Poor system
Check and correct the system grounding, as required.
grounding or ground
loop
Installation manual
ELX200 Passive Loudspeakers
Electro-Voice
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