Noise Reduction - Bose A20 Guia Del Usuario

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 42 of this guide for assistance.
Do not attempt to disassemble or service the inside of the earcups or
Warning:
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 27.

Noise reduction

Problem
Communication,
but no Acoustic
Noise Cancelling
®
noise reduction
in either ear
No active
Acoustic Noise
Cancelling noise
reduction and no
communication
Intercom communications
Problem
Acoustic Noise
Cancelling noise
reduction, but no
incoming audio
What to do
• Make sure the headset is turned on.
• On the control module, check the power indicator. See page 18.
• If using aircraft power, check the aircraft fuse or circuit breaker.
• If using battery power, make sure the batteries are fresh and
correctly installed.
Warning: Replace batteries with alkaline batteries only. Do not use
any other battery chemistries.
• Make sure the headphone plugs are securely inserted into the panel
connectors.
• Try using the headset in a different seat location.
• Remove the microphone assembly from the headset and check for
damage to the connector or pins. See "The microphone assembly"
on page 11.
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.
• Make sure the headset is firmly connected to the aircraft panel.
• Try a different seat location in the aircraft.
Troubleshooting
English - 31