Troubleshooting - Crown CTs 600 Operation Manual

6 Troubleshooting

CONDITION: Power indicator is off.
POSSIBLE REASON
• The amplifier has lost AC power.
• The amplifier's Power switch is off.
• The amplifier is not plugged into the power
receptacle.
• The amplifier output level is so high that
the power supply circuit breaker has
tripped. Allow the unit to cool. Turn down
the Level controls. Press the Reset Switch
on the back panel.
CONDITION: Power indicator is
flashing.
POSSIBLE REASON:
• The AC line voltage has dropped below
20% or has risen above 10% of the
nomi nal line voltage of the power supply.
CONDITION: Thermal indicator is
on.
POSSIBLE REASON:
• The amplifier is becoming too hot for safe
operation. Allow amplifier to cool. Check
for loads less than 2 ohms, and for
excessive input levels. Check for proper
ventilation and proper mode-switch
set ting.
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CTs Power Amplifiers CTs Power Amplifiers
6 Troubleshooting
CONDITION: Fault indicator is
flashing.
POSSIBLE REASON:
• The amplifier channel has stopped
operat ing. Refer the unit to an authorized
Crown Service Center.
CONDITION: Distorted sound.
POSSIBLE REASON:
• Load is wired incorrectly or Stereo/Mono
mode switch is set incorrectly. Check both.
• Input is overlaoded by a signal level that is
too high. Turn down your amplifier level
controls, or turn down the input signal, until
the clip light goes out.
Note: If the signal sounds distorted even though
the Clip LED is off, the input signal may be
dis torted before it reaches the amplifier input.
Check gain staging and output levels of the mixer
or preamp.
"Off/Flashing/On" above means that
the LED can be off, or flashing, or on.
Operation Manual Operation Manual
CONDITION: No sound, even though
the amp has power. Power LED is on
with out flashing and the amp is receiving an input
sig nal. Signal indicator is flashing.
POSSIBLE REASON:
• Speakers not connected.
• Open circuit due to speaker failure.
• There is a short on the amplifier output. First
disconnect your speakers from the affected
channel(s) one by one to determine if one of
the loads is shorted.
• Ready LED is off. Channel has been set to
standby mode via the control system.
CONDITION: No input signal. Signal
indicator is not flashing even though audio is
applied, and the channel is ready..
POSSIBLE REASON:
• Input signal level is very low.
• Level controls are turned down.
CONDITION: Data indicator not
flash ing, even though PIP module is
installed and host computer control
software is active.
POSSIBLE REASON:
• Cable between computer and PIP module is
broken or not connected.
Note: Data indicator flashes only when the installed
PIP2 module is polled for data, or is polled to see
whether it is online.
CONDITION: Bridge LED is lit.
POSSIBLE REASON:
• Amplifier is in bridge-mono mode.
"Off/Flashing/On" above means that
the LED can be off, or flashing, or on.
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