TROUBLESHOOTING
 56 
|
 ENG
Audio
PROBLEM WHAT TO DO
Reduced noise 
 cancellation, 
 intermittent 
 clicking  sounds, 
or   communication 
 distortion in a loud 
environment
Make sure the earcups are clean and free of debris  
(see page 48).
Remove the microphone, then attach again (see page 30).
If the headset emits any loud noise and  related loss of 
 communications while in Acoustic Noise  Cancelling mode, turn the 
power o. The headset will continue to provide  communications in 
the passive noise reducing mode.
Squealing or  whistling 
sound when the 
 headset powers on
Make sure the headset orientation is correct. Use the Left T and 
Right U markings on the headset to orient the headset correctly. 
Make sure the ear cushions fully cover your ears (see page 18).
Make sure the earcups are clean and free of debris  
(see page 48). 
Crackling sound audible 
with headset turned on 
in a loud environment, 
or noise cancelling is 
intermittent
Make sure the headset orientation is correct. Use the Left T and 
Right U markings on the earcups to orient the headset correctly. 
Make sure the earcups are clean and free of debris  
(see page 48).
Remove the microphone, then attach again (see page 30).
If using battery power, check if the battery is low (see page 36).
If using aircraft power, make sure the voltage powering the  
headset is no less than 10 VDC.
WARNING:  If the headset emits any loud noise and  related loss of communications 
while in Acoustic Noise  Cancelling mode, turn the power o. The headset 
will continue to provide communications in the passive noise  
reducing mode.