Bose A20 Aviation Headset Notice D'utilisation page 32

Troubleshooting
Problem
Low volume
of incoming
communications
Intermittent
communication
Reduced volume in
one ear only
No stereo
separation or
communications in
one ear only
Audio
Problem
Reduced Acoustic
Noise Cancelling
®
noise reduction,
intermittent
clicking sounds,
or communication
distortion in a loud
environment
32 - English
What to do
• On the control module, make sure the volume controls are not set
too low. See "Intercom volume controls" on page 19.
• On the intercom/radio, make sure the volume controls are not set
too low.
• Inside the battery compartment, make sure the Intercom
(MON-ST) switch is correctly set for your intercom system.
See "The operation switches" on page 12.
• Check that all headsets sharing the intercom have the Intercom
(MON-ST) switch in the correct position.
• Unplug all other headsets and see if the volume can be adjusted
to an acceptable level.
• Make sure the headset is firmly connected to the aircraft panel.
• Try the headset in a different seat location.
• On the control module, make sure the volume controls are not set
too low. See "Intercom volume controls" on page 19.
• Inside the battery compartment, make sure the Intercom
(MON-ST) switch is correctly set for your intercom system.
See "The operation switches" on page 12.
• If your aircraft has a mono audio system, verify that the Intercom
(MON-ST) switch is set to MON. Refer to "The operation
switches" on page 12.
• Depending on how your audio jacks are wired, there may be
only one channel of audio supplied to the headphone jack. If
the Intercom (MON-ST) switch is set to ST and you only hear
communications on one side, set the switch to MON. This will
play audio on both sides. U174 and 5-pin XLR plugs are mono
audio only.
What to do
• On the outside of each earcup, make sure the TriPort
openings are not blocked. If dust or dirt is present, carefully
remove the debris using tweezers. Do not vacuum or blow out
debris.
• Make sure there are no air gaps around the ear cushion seals.
If ear cushions appear worn, they should be replaced. Refer to
"Ear cushion replacement" on page 29.
Warning: If the headset emits any loud noise and related loss of
communications while in the Acoustic Noise Cancelling
mode, turn off the power switch. The headset will
continue to provide communications in the passive noise
reducing mode.
headset
®