Crown COMTECH DRIVECORE CT 875 - Manual (Page 15)

CT Power Amplifiers
page 15
CT Power Amplifiers
Operation Manual
15 Troubleshooting
15.1 Power Indicator
OFF
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 +15/-25 or has
risen above +15/-25% of the nomi nal line voltage of the
power supply.
• Amp is in Deep Sleep Mode.
FLASHING
15.2 Fault Indicator
FLASHING
CONDITION: Fault indicator is FLASHING.
POSSIBLE REASON
• The amplifier channel has stopped operat ing. Refer the
unit to an authorized Crown Service Center.
• Check for shorted outputs
15.3 Thermal Indicator
ON
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 4 ohms,
and for excessive input levels. Check for proper
ventilation and proper mode-switch set ting.
15.4 Clip Indicator
ON or FLASHING
CONDITION: Clip indicator is ON or FLASHING.
POSSIBLE REASON
• input level or output level is distorting
15.5 Signal Indicator
OFF
CONDITION: Signal indicator is flashing even
though audio is applied, and the channel is
ready.
POSSIBLE REASON
• Input signal level is very low
• Level controls are turned down
15.6 Ready Indicator
OFF
CONDITION: Ready indicator is OFF.
POSSIBLE REASON
• Amplifier may be in deep sleep
CONDITION: Thermal indicator is flashing
POSSIBLE REASON
• Amplifier has become too hot to operate. Allow amplifier
to cool. Amplifier will not pass audio if amplifier has
become too hot
FLASHING
CONDITION: Ready Indicator flashing
POSSIBLE REASON
• Amplifier is in Standby mode. Flashing will stop once
there is an input signal.
FLASHING