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If a problem occurs...
Problem Possible cause Possible solution
No active noise
compensation
The NoiseGard
electronics are switched
off.
Set the NoiseGard ON/OFF switch to
“ON”.
The batteries/
rechargeable batteries
are low.
Check to see if the LED is lit yellow.
If the LED is lit red, replace the
batteries/rechargeable batteries.
The XLR-3 plug is
not connected to the
power source.
Connect the XLR-3 plug to the power
source.
The aircraft fuse is
defective.
Replace the aircraft fuse.