Troubleshooting; Power Indicator; Fault Indicator; Thermal Indicator - Crown COMTECH DRIVECORE CT 4150 Operation Manual

CT Power Amplifiers

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
FLASHING
CONDITION: Power indicator is FLASHING.
POSSIBLE REASON
• The AC line voltage has dropped below +15/-25 or has
• Amp is in Deep Sleep Mode.

15.2 Fault Indicator

FLASHING
CONDITION: Fault indicator is FLASHING.
POSSIBLE REASON
• The amplifier channel has stopped operating. Refer the
• 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.
Operation Manual
circuit breaker has tripped. Allow the unit to cool. Turn
down the Level controls. Press the Reset Switch on the
back panel.
risen above +15/-25% of the nominal line voltage of the
power supply.
unit to an authorized Crown Service Center.
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.
FLASHING
CONDITION: Thermal indicator is flashing
POSSIBLE REASON
• Amplifier has become too hot to operate. Allow amplifier

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
FLASHING
CONDITION: Ready Indicator flashing
POSSIBLE REASON
• Amplifier is in Standby mode. Flashing will stop once
to cool. Amplifier will not pass audio if amplifier has
become too hot
there is an input signal.
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