Bose Aviation Headset X E User Manual

21
Using Your Headset
Power button
Use the power button to turn the headset on or off, or to change the 
LED brightness (Figure 18).
•Press the power button once to turn on ANR.
•Press and hold the power button to turn off ANR. 
Or rely on the smart shutoff feature (descibed on page page 13). 
Note: For details on how to disable smart shutoff, see “Changing the 
optional operation switches” on page 13.
•Press twice rapidly to toggle between the daytime (brighter) and 
nighttime (dimmer) LED settings....

22
Using Your Headset
Holding the control module upright and facing you:
•Use the left knob to adjust volume in the left earcup. 
•Use the right knob to adjust volume in the right earcup. 
Controlling the volume of a single battery powered headset
With ANR on:
1. Set the aircraft communication system to a safe operating level.
2. Turn each volume knob on the headset control module down to 
decrease, or up to increase the volume of the earcup it controls.
Volume control using multiple headsets
When an...

23
Using Your Headset
An LED, located on the control module, changes color to indicate the 
power status, as follows:    
Operating the aircraft powered headset
Power switch
Turn on ANR by setting the power switch to ON (Figure 19).
Figure 19
The volume control knobs 
and power switch on the 
aircraft powered headset 
control module
Volume control
Overall headset volume control requires adjustments at both the air-
craft intercom or radio and at the headset control module. Even at its 
lowest setting,...

24
Using Your Headset
CAUTION: Avoid setting the volume levels too high. Exposure to 
loud sounds may cause hearing damage.
Notice the individual earcup controls
Separate knobs on the control module control the volume for each 
separate earcup (Figure 19 on page 23). 
Holding the control module upright and facing you:
•Use the left knob to adjust volume in the left earcup. 
•Use the right knob to adjust the volume in the right earcup. 
Controlling the volume of a single aircraft powered headset
With ANR...

25
Headset Care and Maintenance
Instructions for continued airworthiness
Bose recommends following the general care and maintenance 
instructions in this guide. With normal use, items such as wind-
screens and ear cushions may require periodic replacement. If 
cleaning or replacement of these items is needed, follow the 
recommendations on the following pages. All other care and 
maintenance, in and out of the warranty period, must be performed 
by Bose or an authorized dealer. Other maintenance is...

26
Headset Care and Maintenance
Ear cushions
As a general rule, ear cushions should be replaced after 500 hours of 
use, depending on how often you fly. You may have to replace them 
more often, if you:
•have a full beard or heavy whiskers
•subject the headsets to severe temperature extremes such as 
parking your airplane outside in severe cold or heat 
•put excess strain on the headset due to improper storage
Indications that the ear cushions need replacing include:
•flaking of the outer covering
•cuts or...

27
Headset Care and Maintenance
Headband cushion
1. Remove the cushion as described below.
2. Place the cushion in a solution of water and a mild detergent 
such as Woolite.
3. Allow the cushion to air dry. Then, reattach by following the 
instructions below. 
Removing environmental moisture
If the protective inner screen becomes damp, due to environmental 
moisture such as light rain, dew, perspiration, or condensation, allow 
it to air dry only. Do not use electric heaters, blowers, or hairdryer 
type...

28
Headset Care and Maintenance
 Figure 21
Pulling the ear cushion skirt 
away from the earcup
4. Tuck an edge of the ear cushion skirt into the slot behind the ear 
cushion flange. Be careful not to fold the skirt over.
5. Work the remainder of the skirt into the slot completely around 
the earcup.
6. Grasp the ear cushion and adjust its position to remove any 
folds in the skirt and wrinkles in the cushion.
Battery replacement
1. Turn off ANR.
2. Lift up the battery door from the control module, using...

29
Headset Care and Maintenance
Battery door replacement
1. Lift up the battery door from the control module, using the finger 
indent.
2. Gently rotate the cover sideways to remove from the control 
module.
3. Insert new door tab, being careful to insert between the metal 
spring and plastic housing.
Headband cushion replacement
The headband cushion is designed to give the maximum level of 
comfort to your headset. 
Please follow the maintenance instructions below for regular care. 
Bose recommends that...

30
Troubleshooting
In case of difficulty
Look for the problem in the left column of the table, then follow the instructions on “What to do” in 
the right column. If the problem persists, contact the Bose® Aviation Headset Department, using 
the contact information on page 34 of this guide, for assistance. 
Problem What to do
Communication, but no 
active noise reduction in 
either ear•Make sure the headset ANR is set to ON.
•If using aircraft power, check the aircraft fuse or circuit breaker. 
•If using...