Bose A20 Aviation Owner's guide - Page 31

English Tab 2, 10 Tab 3, 11 Tab 4, 12 Tab 5, 13 Tab 6, 14 Tab 7, 15 Tab 8, 16 TROUBLESHOOTING In case of difficulty 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 37 of this guide for assistance. CAUTION: 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 23. Noise Reduction Problem What to do Communication, but no Acoustic Noise Cancelling® noise reduction in either ear. No active Acoustic Noise Cancelling noise reduction and no communication. • Make sure the headset is turned on. • Press the power button to turn the headset on. • Check the power indicator. See page 16 for a description of the power indicator. • If using aircraft power, check the aircraft fuse or circuit breaker. • If using battery power, make sure the batteries are fresh and cor- rectly installed. • 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 8. Communications Problem What to do Acoustic Noise Cancelling noise reduction, but no incoming audio. • Check to see if the volume controls are set too low. See "Volume control" on page 16 for instructions on volume adjustment. • Check the volume setting of intercom/radio. • Make sure the headphone plugs are securely inserted into the panel connectors. 27