7 Troubleshooting
CONDITION: Normal operation.
CONDITION: Enable LED on, ODEP
OTHER POSSIBLE CONDITIONS TO BE AWARE OF:
The Enable (Power) LED is on, and the ODEP LEDs are on or flickering.
ODEP LEDs on indicates a high energy reserve. An ODEP LED flickering means that the energy reserve for the affected channel is dip- ping.
CONDITION: Normal LED display but distorted sound.
POSSIBLE REASON:
•Load is wired incorrectly or
Stereo/Mono 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 LED goes out.
Check mixer levels and gain staging, mixer clip lights, and pads built into microphones.
CONDITION: Normal LED display but no sound.
POSSIBLE REASON:
•Input signal level is very low.
•Level controls are turned down.
•Input cable broken or not plugged in.
•Speakers not connected.
•The amplifier output level is so high that the breaker has tripped. Try to identify and correct the problem before resetting the breaker. If the problem persists, refer the unit to an autho- rized Crown Service Center.
•The amplifier output is shorted. First discon- nect your speakers from the affected chan- nel(s) one by one to determine if one of the loads is shorted.
LEDs off, no sound.
POSSIBLE REASON:
•Transformer thermal protection has activated. Amplifier will come back on automatically when it cools.
•ODEP reserves have been depleted and the amplifier is about to activate protection.
•High-voltage power supply fuse or breaker has blown
Check for shorts in the speaker lines. Avoid loads of 1 ohm or less. Let the amplifier cool down, then reset the breaker
CONDITION: All LEDs off.
POSSIBLE REASON:
•The amplifier has lost power.
•The amplifier is not plugged into the power receptacle.
•The amplifier’s circuit breaker has tripped. Allow the amplifier to cool; check for shorts in the speaker lines; remove excessive loads. Then reset the breaker.
•The amplifier has blown its internal fuse for the
supply. Refer the unit to a qualified technician.
page 18 | Operation Manual |