Vonyx AP1200A Hi-End Active Manuel D'instructions page 3

REAR PANEL
TROUBLESHOOTING
One certain method of determining if a speaker is faulty is to substitute a speaker that is known to work correctly for
the suspected problem speaker. If the "normally correct speaker" is experiencing the same difficulties or problems
as the suspected problem speaker, use the information below to isolate the problem.
Problem Possible cause
No output Cables
Intermittent Poor connections
Constant noise, Faulty electronic
buzzing and/or
humming
Poor low- Improper polarity
frequency output
1. Input connector for microphone.
2. Line input connector for the audio input source e.g. mixer,
CD player, etc.
3. Line output connector to a second box or amplifier.
4. Volume control for the microphone
5. Volume control for the line input
6. Volume control for the speaker output.
7. Tone control.
8. Power ON/OFF LED indicator
light when the amplifier is turned on.
9. Clip LED Indicator. These LED will light up when amplifier
are on max power. It can occur that these LED will lit up
now and then, this is not a problem. But if it lights up
continually you need to adjust the volume down, otherwise
permanent damage to equipment might occur!
10. Passive speaker output connector (8Ohm)
Action
Reseat all connectors
Substitute known good cables
Check solder joins
Inspect cable for damage
Inspect wire or connector for stray strand that may short
While it is possible for a faulty speaker to exhibit intermittent
output, it's more likely that an output cable/connector is the
problem. Check the soldering on your connectors.
Any constant noise originates in the amplifier, mixer, signal
processing, source device in the signal devices, or line-level
wiring. Check and correct system grounding as required. Chain
check for noisy sources or electronic components. Check wiring
for shielding.
When two speakers in close proximity to each other are
connected out-of-polarity, they can partially cancel each other out,
especially at low frequencies. Check your speaker cables to be
sure they are all identically wired and connected. Check the
balanced line signal cables to be sure they are all correctly wired.
This clear green indicator will
.
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