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Commercial Audio Series Mixer-Amplifi ers
Operation Manual page 13
4 Troubleshooting
CONDITION: No power to the
mixer-amplifi er.
POSSIBLE REASON:
• The mixer-amplifi er’s Power switch is off.
• The mixer-amplifi er is not plugged into the
power receptacle.
• The mixer-amplifi er’s high-voltage power sup-
ply circuit breaker has tripped. Verify that the
AC mains voltage is correct.
CONDITION: Distorted sound.
POSSIBLE REASON:
• Input signal level is too high. Turn down your
input volume controls. NOTE: Your mixer- am-
plifi er should never be operated at a level which
causes the Clip LEDS to illuminate constantly.
CONDITION: Distorted sound.
POSSIBLE REASON:
• Input signal level is too high. Turn down your
input volume controls. NOTE: Your mixer- am-
plifi er should never be operated at a level which
causes the Clip LEDS to illuminate constantly.
• Master volume level is too high. Turn it down to
about 3/4 of maximum level.
CONDITION: No sound.
POSSIBLE REASON:
• The amplifi er is in “fault” mode. A Fault status
can be triggered when one of the amplifi er’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 amplifi er 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, press the Reset button
on the back of the unit. If that does not work,
return the unit to Crown or an authorized Crown
Service Center for servicing.
• No input signal.
• Input signal level is very low.
KEY
LED OFF
LED ON
CONDITION: No sound.
POSSIBLE REASON: