18
Troubleshooting
Many problems can be eliminated by
re-checking the wiring and settings of the
unit. If a problem cannot be solved using
the guide below, please call the AudioCon-
trol team for further assistance, or e-mail
us at [email protected]
1. No Sound
a. Verify the Power LED is Blue.
b. Verify Status LED is Blue.
c. Verify Protection LED is Off.
d. If you are not using master trigger-
ing, check that there is a wire link
between the +12V pin and the Trig-
ger Input pin of the Master Trigger
3-pin connector block.
e. Verify the source unit is operating.
f. Check the speaker connector plugs
on the rear panel.
g Unplug the power cord and leave
for 1 minute. Reconnect power
and turn the unit on and check for
audio.
2. Protection LED is off, but none of
the Zone Status LEDs are on:
a. Defeat the signal-sense circuits
using the zone DIP switches on the
rear panel. All of the zone status
LEDs should turn on. If not, call
AudioControl’s customer service.
b. Verify the source unit is operating.
c. Increase the preamp volume if sig-
nal sense is engaged, or just going
steady.
d. Adjust the rear panel zone gain
controls clockwise.
3. Channel Status LED is Red:
a. Check speaker leads for a short.
Swap speaker connectors on rear to
see if the problem moves with the
wires.
b. If the unit is excessively hot, turn
down the volume and allow it to
cool off. The Status LED should
turn off after a short while. Verify
that any ventilation holes have not
become blocked.
c. The speaker impedance may be too
low. Use an Ohmeter to measure
the impedance on the speaker
wires.
4. Speaker channels are cutting in and
out:
a. If using external volume controls,
check that they can handle the
power output.
b. Make sure the speaker impedance
is not less than 2 Ohms, or 4 Ohms
when used in bridged mono.
c. There may be a short in the wires.
Suspect a short if the problem hap-
pens only at the highest volumes.
5. Protection LED is Red:
a. Disconnect power from the unit
for 3 to 4 minutes and reconnect to
power.
b. Disconnect all speaker wires. If
it still turns red, and the unit has
cooled, something rather serious
has happened inside the unit. Call
AudioControl’s lonely folks in cus-
tomer service.
Wire Link
Troubleshooting
