Troubleshooting - Electro-Voice ETX-10P User Manual

ETX Powered Loudspeakers
5

Troubleshooting

Problem Possible Cause(s)
1. No Sound Amplifier
Wiring
2. Poor With SUB menu-
Low- cross-over frequency
Frequency activated
Response
3. Intermittent Faulty Connection
output such
as cracking or
distortion
4. Constant Defective source or
noise such as other electronic
buzzing, device
hissing or
Poor system
humming
grounding or ground
loop
Input gain knob is
not in the MIC
position
5. No sound Microphone requires
produced with phantom power
microphone
connected to
Input gain knob is
INPUT 1 or
not in the MIC
INPUT 2
position
6. Sound is Excessive input level
distorted front
LED is OFF,
LCD screen
LIMIT is ON
2014.02 | 03 | F.01U.276.083
Action
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.
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.
If no subwoofers are used with the system, select the OFF
position. For more information, see Full-Range loudspeaker
DSP control menu, page 29.
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.
Slowly increase the input gain knob level to engage the
microphone pre-amp.
Use a dynamic microphone that does not require phantom
power. If using a microphone requiring phantom power, an
external phantom power source is needed.
Slowly increase the input gain knob level to engage the
microphone pre-amp.
Reduce the input level or loudspeaker level knobs to
prevent limit.
User Manual Electro-Voice