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Commercial Audio Series Business Music System
page 18
Operation Manual
CONDITION: No power.
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. Verify that the
AC mains voltage is correct, then press the
Reset button on the back panel.
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 LED 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, press the Reset button on
the back panel, or return mixer-amp to Crown
or an authorized Crown Service Center for ser-
vicing.
4 Troubleshooting
• No input signal.
• Input signal level is very low.
Key:
LED OFF
LED ON