Introduction
7
About Your Bose® A20® Aviation Headset
7
Our Commitment To You
7
What’s Included
7
Components
8
Control Module Variations
9
Power And Cable Variations
10
Preparing The Headset For Use
11
The Microphone Assembly
11
Attaching The Microphone Assembly
11
The Battery Compartment
12
Opening The Battery Compartment
12
The Operation Switches
12
Changing The Operation Switches
12
Auto On
13
Auto Off
13
Inserting And Replacing The Batteries
14
Connecting The Headset To The Aircraft
14
Using The 6-Pin Plug
14
Using The Dual General Aviation Plugs
15
Using Other Plug Types
15
Using The Headset
16
Wearing And Adjusting The Headset
16
Conditions Related To Fit
16
Microphone Placement
17
Clothing Clips
17
Using The Control Module
18
Power Button
18
Power Indicator
19
Intercom Volume Controls
19
Primary And Secondary Audio Sources
20
Aux Audio Sources (Wired)
20
Bluetooth ® Audio Sources (Wireless)
20
Using The Headset With A Bluetooth® Device
21
Pairing The First Device
21
Pairing Another Device
22
Switching Between Connected Devices
22
Bluetooth Multi-Function Button
22
Making And Answering Calls
23
Reconnecting To A Previously Connected Device
24
Recovering A Lost Connection
24
Disconnecting A Bluetooth Device
24
Clearing The Headset Pairing List
24
Controlling Bluetooth Volume
24
Secondary Audio Modes
25
Secondary Audio Mode Selector
25
Managing Multiple Secondary Sources
26
Setting The Priority (Bt-Aux) Switch
26
Headset Care And Maintenance
27
Instructions For Continued Airworthiness
27
Cleaning The Headset
27
General Cleaning
27
Headset Earcup Openings
27
Microphone Windscreen
28
Earcup Inner Screen
28
Headband Cushion
28
Replacing Parts
28
Microphone Windscreen Replacement
28
Ear Cushion Replacement
29
To Replace The Ear Cushions:
29
Battery Replacement
29
Headband Cushion Replacement
30
Microphone Assembly Or Terminator Cover Replacement
30
Storage
30
Troubleshooting
31
Installation
36
Mounting The Aircraft Panel Connector
36
Technical Information
37
Mono Connection Diagram
37
Stereo Connection Diagram
37
Helicopter (U174) Connection Diagram
38
Details On Making The Connections
38
Faa Technical Standards Order
40
Service And Warranty Information
41
Locating The Headset Serial Number
41
Limited Warranty
41
Contact Information
42
Ordering Parts And Accessories
42
Discussie
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