Crown Audio XLS Series operation manual Troubleshooting, Condition No power to the amplifier

XLS Series Power Amplifiers

5 Troubleshooting

CONDITION: Normal operation.

POSSIBLE REASON:

•This is normal operation for your amp.

CONDITION: No power to the amplifier.

POSSIBLE REASON:

•The amplifier’s Power switch is off.

•The amplifier is not plugged into the power receptacle.

•The amplifier’s high-voltage power supply cir- cuit breaker has tripped. Verify that the AC mains voltage is correct, then press the Circuit Breaker button on the back panel.

CONDITION: Distorted sound.

POSSIBLE REASON:

•Input signal level is too high. Turn down your amplifier Level controls. NOTE: Your amplifier should never be operated at a level which caused the Clip LEDS to illuminate constantly.

CONDITION: No sound.

POSSIBLE REASON:

• The amplifier has just turned on and is still in the 4-second turn-on delay.

• The amplifier is in “fault” mode. A Fault status can be triggered when one of the amplifier’s protection circuits is activated. First disconnect your speakers from the affected channels(s) one by one to determine if one of the loads is shorted. If the indicators return to normal sta- tus, then try a different speaker or cable to determine where the short is occurring. If no short can be found, turn off the amp and allow the amp to cool. If indicators do not return to normal after restarting your amp, check the fuse and replace if necessary, or return amp to Crown or an authorized Crown Service Center for servicing.

•No input signal.

• Input signal level is very low.

•Level controls are turned down.

•Speakers not connected.

KEY

Operation Manual page 15