CH and CL Series Power Amplifiers
6 Troubleshooting
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 power supply circuit breaker has tripped. Verify that input levels and out- put impedances are within safe ranges. Turn off the Power switch and reset the circuit breaker. Then, turn the Power switch back on. If it trips again or the unit fails to operate properly, contact an authorized Crown Service Center.
CONDITION: Fault indicator is flash- ing.
POSSIBLE REASONS:
• The amplifier has just been powered up and is not ready for operation yet.
• The heatsinks are too hot. Ensure ade- quate cooling. Remove excessive loads.
• The transformer
• The amplifier output wires have developed a short circuit.
• The amplifier output stage has stopped operating. If so, return the unit to a Crown Authorized Service Center.
CONDITION: No input signal.
(Signal indicator is not flashing even though audio is applied).
POSSIBLE REASON:
• Input signal level is very low.
• Level controls are turned down.
CONDITION: Fault indicator is on.
POSSIBLE REASON:
•The amplifier output stage has stopped operating. Refer the unit to an authorized Crown Service Center.
CONDITION: Distorted sound.
POSSIBLE REASON:
•Load is wired incorrectly or Dual/Bridge mode switch is set incorrectly. Check
both.
•Input signal level is too high. Turn down your amplifier level controls, or turn down the input signal, until the clip light goes out.
Note: If the signal sounds distorted even though the Clip LED is off, the input signal is distorted. Check gain staging and output lev- els of the mixer or preamp.
CONDITION: No sound, even though the amp has power. Power LED is on without flashing and the amp is receiving an input signal. Signal indicator is
flashing.
POSSIBLE REASON:
•Speakers not connected.
•Open circuit due to speaker failure.
•There is a short on the amplifier output. First disconnect your speakers from the affected channel(s) one by one to determine if one of the loads is shorted.
page 28 | Operation Manual |
