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Commercial Audio Series Mixer-Amplifiers
page 14
Operation Manual
CONDITION: No power to the
mixer-amplifier.
POSSIBLE REASON:
• The mixer-amplifier’s Power switch is off.
• The mixer-amplifier is not plugged into the
power receptacle.
• The mixer-amplifier’s high-voltage power sup-
ply circuit breaker has tripped, or the fuse has
opened on 220/230/240V models. Verify that
the AC mains voltage is correct, then press the
Reset button on the back panel.
• If the unit is operated from a 24V DC supply,
the internal fuse may have opened. (The power
switch has no effect on 24V operation.)
CONDITION: Distorted sound.
POSSIBLE REASON:
• Input signal level is too high. Turn down your
input volume controls. NOTE: Your mixer-
amplifier should never be operated at a level
which causes the Clip LEDS to illuminate con-
stantly.
• Master volume level is too high. Turn it down
to about 3/4 of maximum level.
CONDITION: No sound.
POSSIBLE REASON:
• The amplifier is in “fault” mode. A Fault status
can be triggered when one of the amplifier’s
protection circuits is activated. First disconnect
your speakers from the affected channel(s) one
by one to determine if one of the loads is
shorted. If an amplifier channel has a thermal
fault, there will be no indication on the front
panel, but the amp will recover after cooling. If
operation does not return to normal after
restarting your amp, check the fuse and replace
if necessary, or return mixer-amp to Crown or
an authorized Crown Service Center for servic-
ing.
3 Troubleshooting
• No input signal.
• Input signal level is very low.