Troubleshooting; Noise Reduction - Bose A20 Notice D'utilisation

Troubleshooting

Look for the problem in the left column of the table, then follow the "What to do"
instructions in the right column. If the problem persists, contact Bose using the
contact information on page 41 of this guide for assistance.
Warning: Do not attempt to disassemble or service the inside of the earcups or
other parts of the headset. Only the boom microphone cable, access
cover, batteries, windscreen, headband cushion, and ear cushions are
replaceable by the user. For instructions on how to care for and maintain
the headset, see "Headset Care and Maintenance" on page 25.

Noise reduction

Problem What to do
Communication, • Make sure the headset is turned on.
but no Acoustic
• On the control module, check the power indicator. See page 18.
Noise Cancelling
®
• If using aircraft power, check the aircraft fuse or circuit breaker.
noise reduction
• If using battery power, make sure the batteries are fresh and
in either ear
correctly installed.
Warning: Replace batteries with alkaline batteries only. Do not use
No active • Make sure the headphone plugs are securely inserted into the panel
Acoustic Noise connectors.
Cancelling noise
• Try using the headset in a different seat location.
reduction and no
• Remove the microphone assembly from the headset and check for
communication
damage to the connector or pins. See "The microphone assembly"
on page 10.
Intercom communications
Problem What to do
Acoustic Noise • On the control module, make sure the volume controls are not set
Cancelling noise too low. See "Intercom volume controls" on page 18.
reduction, but no
• On the intercom/radio, make sure the volume controls are not set
incoming audio
too low.
• Make sure the headset is firmly connected to the aircraft panel.
• Try a different seat location in the aircraft.
30 - English
any other battery chemistries.