Bose A20 Aviation Owner's Manual - Page 33

Browse online or download pdf Owner's Manual for Headsets Bose A20 Aviation. Bose A20 Aviation 43 pages. Aviation headset
Also for Bose A20 Aviation: Quick Reference Manual (2 pages), Owner's Manual (44 pages), Owner's Manual (40 pages), Owner's Manual (44 pages), Owner's Manual (44 pages), Quick Reference Manual (2 pages)

Print Page

00_Cavu.book Page 29 Thursday, October 28, 2010 12:03 PM

English

Tab 2, 10

Problem

Low rumbling

sound with the

headset turned on

in a quiet

environment.

Crackling sound

audible with

headset turned on

in a loud

environment, or

Acoustic Noise

Cancelling

noise

reduction is

intermittent.

Auxiliary audio input

Problem

No audio from

auxiliary source.

Audio in one ear

only from the

auxiliary input.

Tab 3, 11

Tab 4, 12

• Adjust the earcup fit to create a better seal on your head. The

low-force design of the headset makes it sensitive to items that

interfere with the seal around your ear. Make sure your ears are

completely inside the ear cushions, and that a hat or eyeglasses

with thick temples do not interfere with the seal.

• Check ports at the outside surface of each earcup to ensure that

they are not blocked. If dust or dirt is present, carefully remove

the debris using tweezers. Do not blow out or vacuum debris.

• Inspect the seal between the ear cushion skirt and the earcup.

The skirt should fit into the slot on the earcup with no gaps.

Replace any cushions that appear to be worn out.

• Ensure the headset orientation is correct. Use the Left (L) and

Right (R) markings above the earcups to orient the headset

correctly.

• Adjust the earcup fit. Refer to "Wearing and adjusting the head-

set" on page 13.

• If your headset is battery-powered, check to see if the battery is

low (indicated by fast blinking red LED).

• If your headset is aircraft powered, make sure the voltage

powering the headset is no less than 10 VDC.

• Inspect the seal between the ear cushion skirt and the earcup.

The skirt should fit into the slot on the earcup with no gaps.

Replace any cushions that have surface tears, torn stitching

joints, large wrinkles, or have become dried and stiff.

• Turn source volume up.

• Try another source with the headset to eliminate the source as

the possible problem.

• Make sure multifunction switch is not set to the bottom (intercom

only) position. The multifunction switch must be either in the top

or middle position for audio from an auxiliary input to be enabled.

• Check the connection between the auxiliary source and the

control module. Both ends of the AUX IN connector cable must

be properly seated inside the sockets.

• If the multifunction switch is set to the prioritized position (top),

the auxiliary audio source will not be heard if there is an audio

signal from the intercom.

• Check the connection between the auxiliary source and the

module. Both ends of the AUX IN connector cable must be

properly seated inside the sockets.

• Make sure the earcup cover on the headset is in place and

properly connected. Refer to "Attaching the microphone

assembly" on page 8.

Tab 5, 13

Tab 6, 14

Tab 7, 15

What to do

Tab 8, 16

ROUBLESHOOTING