Operation Manual; 15.1 Power Indicator ; 15.2 Fault Indicator - 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