Crown CT 8150 Manuale Utente

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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