Troubleshooting - Electro-Voice Zx1-Sub Owner's Manual

Troubleshooting

Problem Possible Cause(s)
1. No Sound Amplifier
Wiring
2. Poor Low Speakers wired
out-of-polarity
Frequency
Response
3. Intermittent output Faulty Connection
such as crackling
or distortion
4. Constant noise Defective amplifier
such as buzzing, or other electronic
hissing, humming device
Poor system
grounding or
ground loop
If these suggestions do not solve your problem, contact your nearest Electro-Voice dealer or Electro-Voice distributor.
14
Connect a known working test speaker to the amplifier outputs. If there is no
sound, check that all the electronics are on, the signal routing is correct, the
source is active, the volume is turned up, and so on. Correct/repair/replace
as necessary. If there is sound, the problem is in the wiring.
Verify that you have connected the correct wire pairs to the amplifier. Play
something at low level through the amplifier (for example, from a CD player
or tuner). Connect the test speaker in parallel with the malfunctioning line. If
the sound level has gone or is very weak, the line has a short in it (possibly a
severe scrape, pinch, or staple puncture). If the sound level is normal, the
wire is open (possibly a cut wire or a missed connection). Using the test
speaker, move down the line and test each connection/junction until you find
the problem and correct it. Observe proper polarity.
When two speakers are connected out of polarity, the low frequencies will
cancel each other acoustically. Carefully observe the wire markings or tracers
on your speaker wires. Verify that 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.
Check all connections at amplifier and speakers to ensure they are all clean
and tight. If the problem persists, it may be in the amplifier or wiring.
See Problem 1 above.
If the noise is present but no program material is playing, the likely cause is
the signal chain in the electronics. Evaluate each component as necessary to
isolate the problem.
Check and correct the system grounding, as required.
Action
Electro-Voice Zx1 Series Owner's Manual