Troubleshooting - Crown CTs 1200 Operation Manual

CTs Power Amplifi ers

6 Troubleshooting

Operation Manual
CONDITION: Power indicator is off.
POSSIBLE REASON
• The amplifi er has lost AC power.
• The amplifi er's Power switch is off.
• The amplifi er is not plugged into the power
receptacle.
• The amplifi er 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
fl ashing.
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 amplifi er is becoming too hot for safe
operation. Allow amplifi er to cool. Check
for loads less than 2 ohms, and for
excessive input levels. Check for proper
ventilation and proper mode-switch
set ting.
CONDITION: Fault indicator is
fl ashing.
POSSIBLE REASON:
• The amplifi er 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 amplifi er 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 amplifi er input.
Check gain staging and output levels of the mixer
or preamp.
"Off/Flashing/On" above means that
the LED can be off, or fl ashing, or on.
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