Crown Audio I-T9000 HD Troubleshooting, I-TechHD Series Power Amplifiers, page, Possible Reason

I-Tech HD Series Power Amplifiers

5 Troubleshooting

CONDITION: Power indicator is off and power switch is not illu- minated.

POSSIBLE REASON:

• The amplifi er has lost AC power.

• The amplifi er is not plugged into the power receptacle.

• Rear-panel breaker is off.

CONDITION: Power indicator is off and power switch is illu- minated.

POSSIBLE REASON:

• The amplifi er’s power switch is off.

CONDITION: Power indicator is flashing.

POSSIBLE REASON

• The AC line voltage has dropped below 15% or has risen above 15% of the rated range.

“Off/Flashing/On” means that the LED can be off, or fl ashing, or on.

CONDITION: Thermal indicator is on.

POSSIBLE REASON:

•The amplifi er is becoming too hot for safe operation. Allow amplifi er to cool. Check for loads less than 2 ohms, and for excessive input levels. Check for proper ventilation.

CONDITION: Fault indicator is flashing.

POSSIBLE REASON:

•The amplifi er channel has stopped operating. Refer the unit to an authorized Crown Service Center.

CONDITION: Power indicator is off and power switch is not illu- minated.

POSSIBLE REASON:

•Load is wired incorrectly or Output Mode switch in LCD-screen menu is set incor- rectly. Check both.

•Input is overloaded by a signal level that is too high. Turn down your amplifi er level controls (Encoders), 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 may be distorted before it reaches the amplifi er input. Check gain staging and output levels of the mixer or preamp.

Operation Manual page 39