Bose A20 Aviation Owner'S Manual Download Page 36

Page: 36 / 44

Technical Information

36 - English

Caution:

Do not use excessive force or bend the installed connector. This may

damage or break internal solder joints.

Note:

The aircraft panel connector cannot be installed in an audio system using

transformer-coupled audio outputs. Contact Bose Technical Support, using

the contact information on page 39 for details.

Mono connection diagram

10-32

V DC 1/2A

1V+IN
2 GND
3 COMM L

4 COMM R

5 MIC HI

6 MIC LO

RED

BLK

WHT

BLU

WHT

WHT/BLU

BLK/WH

Ring

(audio)

Existing PTT

switch

and wiring

(no connection to

Bose headset)

Microphone - Jack

TPP

(PTT)

Barrel

(gnd)

Headphone - Jack

Barrel

(audio gnd)

Tip

(phone audio)

Existing wiring to

aircraft intercom/

audio panel

Stereo connection diagram

Existing wiring to

aircraft stereo

intercom/audio panel

10-32

V DC

1/2A

1V+IN
2 GND
3 COMM L
4 COMM R
5 MIC HI
6 MIC LO

RED

BLK

WHT

BLU

WHT

WHT/BLU

BLK/WH

Audio

Existing

PTT switch

and wiring

(no connection to

Bose headset)

Microphone - Jack

TPP

(PTT)

Barrel

(gnd)

Stereo Headphone - Jack

Barrel

(audio gnd)

Tip

(phone audio left)

Phone

audio (right)

Summary of Contents for A20 Aviation

Page 1: ...Bose A20 Aviation Headset Owner s Guide ...

Page 2: ...on In passive mode the control module will automatically switch to maximum volume If your headset is aircraft powered connect the headset to the aircraft power sources only as described in Connecting the headset to the aircraft on page 13 Make sure portable devices do not interfere with the aircraft s navigation and communication systems It is a pilot s responsibility to ensure that portable devic...

Page 3: ...mplies with Part 15 of the FCC rules Operation is subject to the following two conditions 1 This device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause undesired operation This device complies with FCC and Industry Canada RF radiation exposure limits for general population It must not be collocated or operating in con...

Page 4: ...dset to the aircraft 13 Using the 6 pin plug 13 Using the dual general aviation plugs 14 Using other plug types 14 Using the headset 15 Wearing and adjusting the headset 15 Conditions related to fit 15 Microphone placement 16 Clothing clips 16 Using the control module 17 Power button 17 Power indicator 18 Intercom volume controls 18 Primary and secondary audio sources 19 AUX audio sources wired 19...

Page 5: ...cup inner screen 27 Headband cushion 27 Replacing parts 27 Microphone windscreen replacement 27 Ear cushion replacement 28 Battery replacement 28 Headband cushion replacement 29 Microphone assembly or terminator cover replacement 29 Storage 29 Troubleshooting 30 Installation 35 Mounting the aircraft panel connector 35 Technical information 36 Mono connection diagram 36 Stereo connection diagram 36...

Page 6: ... our steadfast pursuit of this policy in music and entertain ment systems for the home the automobile and businesses At Bose we are committed to investing in research that continually gives rise to new technologies for improving sound reproduction When you purchase any product from Bose we encourage you to compare it as we do to competitive products We believe that this process will enhance your a...

Page 7: ...trol module variations on page 8 for options 2 AA alkaline batteries 3 5 mm AUX audio cable Cable connector varies Note Cable connector types will vary based on model of headset See Power and cable variations on page 9 Warning Replace batteries with alkaline batteries only Do not use any other battery chemistries ...

Page 8: ...ut Bluetooth Volume Down button Bluetooth indicator Bluetooth multi function button Secondary Audio Mode selector Mute Intercom prioritized over secondary sources Mix Intercom mixed with secondary source s Off Intercom only Mute Intercom prioritized over secondary sources Mix Intercom mixed with secondary source s Off Intercom only Secondary Audio Mode selector Note When the Secondary Audio Mode s...

Page 9: ...red options Operate with either aircraft or battery power No battery needed when connected to aircraft power Dual G A 6 pin U174 5 pin XLR U384 8 pin An adapter is available from Bose to convert a 6 pin connector to a dual G A or U174 plug for additional connection flexibility Note Many different combinations of control module microphone connector and cable types are available Contact Bose Technic...

Page 10: ...cover near the bottom of the earcup where you want to attach the microphone assembly 2 Remove the terminator cover to reveal the connector pins on the earcup 3 Carefully line up the microphone assembly to the small connector socket on the earcup 4 Slide the connector into the socket until it reaches the stop Terminator cover Connector pins Microphone assembly Connector pins L left Caution Do not f...

Page 11: ...The operation switches The operation switches control Priority BT AUX Intercom MON ST Auto On feature and Auto Off feature For details see the table on page 12 The Auto On feature is only available for aircraft powered versions The Intercom MON ST option is only available for headset configurations that support two channel or stereo intercom systems The Priority BT AUX option is only available for...

Page 12: ...in OFF position the user must manually turn the headset on AUTO OFF Set at the factory to enable the Auto Off function The headset will turn off after three to nine minutes of inactivity To disable Auto Off set the switch to OFF With the switch in OFF position the user must manually turn the headset off Auto On With aircraft powered versions 5 pin XLR 6 pin and 8 pin the headset will turn on autom...

Page 13: ... required for operation if aircraft power is available Connecting the headset to the aircraft The headset can be configured to either plug into aircraft power or rely entirely on battery power Using the 6 pin plug A single 6 pin plug inserted into the 6 pin connector provides the headset with aircraft power and intercom audio If your headset is aircraft powered a 6 pin connector may be installed a...

Page 14: ...nly version of the headset has two general aviation G A plugs that connect to the aircraft audio Although the plugs look similar the microphone plug is shorter thinner and has a slightly different shape than the intercom plug Insert the thicker intercom plug in first It will only fit into one of the jacks Then insert the thinner microphone plug into the other jack Microphone Intercom Audio Using o...

Page 15: ...tments with the headset powered on in a noisy environment In very loud conditions such as during takeoff you may experience a brief reduc tion in Acoustic Noise Cancelling as the headset compensates for a momentary pressure change If the problem continues when the sound level returns to normal see Noise reduction on page 30 If the problem persists contact Bose Techni cal Support Conditions related...

Page 16: ...hone with its talk side facing in indicated by label Though it will be slightly off center the microphone should be 1 2 inch from the opening of your lips Mic is 1 2 inch from mouth Mic label 3 Make sure the talk side of the microphone is facing your lips Do not purse your lips Clothing clips The control module cable is fitted with two clothing clips Use the clips to attach the headset cable to yo...

Page 17: ... Audio Mode selector Mute Intercom prioritized over secondary sources Mix Intercom mixed with secondary source s Off Intercom only Mute Intercom prioritized over secondary sources Mix Intercom mixed with secondary source s Off Intercom only Secondary Audio Mode selector Power button Action What to do Turn on the headset Press once Turn off the headset Press and hold for three seconds Note When pow...

Page 18: ...es only Do not use any other battery chemistries When the batteries reach this level the Bluetooth feature is disabled to conserve remaining power You will hear a tone indicating that your Bluetooth device is being disconnected and the Bluetooth feature is turning off Intercom volume controls The left and right volume control wheels on the control module adjust the intercom volume of the correspon...

Page 19: ...audio input to connect your headset with an exter nal audio source such as a portable GPS or a portable audio device The connector is located at the bottom end of the control module as shown Use the supplied 1 8 inch 3 5 mm adapter cable to connect your external audio device Plug one end of the adapter cable into the headphone plug on your device and the opposite end into the headset AUX audio inp...

Page 20: ...s will only happen the first time you turn on the headset 3 Locate the Bluetooth menu on your device and make sure the Bluetooth feature is ON 4 Select Bose A20 from the Bluetooth device list Bose A20 The Bluetooth indicator flashes blue while the devices are pairing and a tone indicates successful connection Note After five minutes of inactivity the headset will automatically exit pairing mode an...

Page 21: ... time Only one connected device can be heard at a time To switch between two connected Bluetooth devices pause audio on the first device and start audio on the other To confirm connection check the Bluetooth device list on your device Note Incoming and outgoing phone calls automatically mute all other secondary audio sources when the Secondary Audio Mode selector is in either the MUTE or MIX posit...

Page 22: ...here are no active or incoming calls press twice in quick succession To transfer the audio to the mobile phone When you are on a call press for three to four seconds This transfers the audio to the mobile phone handset while the Bluetooth connection remains active Note Some functions may not be available for some devices Refer to your device user s guide for further details Note If you are on a ca...

Page 23: ...ter five minutes of inactivity the Bluetooth feature will turn off Move the device back into range and press once to reconnect Disconnecting a Bluetooth device On the headset press and hold for 5 seconds to turn the Bluetooth feature off On your device turn the Bluetooth feature off Move the Secondary Audio Mode selector to the OFF position Clearing the headset pairing list With the Bluetooth feat...

Page 24: ... the intercom audio Audio from a connect ed device will keep playing during intercom communications Note In MIX mode you will hear a maximum of two audio sources the intercom plus one secondary source Also see Managing multiple secondary sources on page 25 OFF Intercom only Note In OFF mode Bluetooth power is disconnected and all antennae are disabled Only intercom audio is active All secondary au...

Page 25: ...other source Setting the Priority BT AUX switch To assign priority to one of your secondary sources 1 Locate the Priority BT AUX switch inside the battery compartment AUTO OFF ON OFF AUTO ON ON OFF 2 Set the switch to the correct source BT or AUX as shown below When the switch is in the BT position the Bluetooth source will override the AUX source if a signal is detected When the switch is in the ...

Page 26: ...ance Cleaning the headset General cleaning Gently wipe the outside surfaces of the headband connectors plastic parts and headband cushion using a soft cloth moistened with water and mild soap Take special care when cleaning the ear cushions and the outside surfaces of the earcups Do not immerse ear cushions in water or any other liquid Headset earcup openings The TriPort headset opening and the mi...

Page 27: ... light rain dew perspiration or condensation allow it to air dry only Do not use electric heaters blowers or hair dryers to dry the inner screen Headband cushion 1 Remove the cushion as described in Headband cushion replacement on page 29 2 Place the cushion in a solution of water and a mild detergent 3 Allow the cushion to air dry then reattach Replacing parts Through normal use parts like windsc...

Page 28: ...on reducing the effectiveness of the seal To extend the life of the ear cushions perform regular cleaning as described in General cleaning on page 26 To replace the ear cushions 1 Grasp the ear cushion skirt where it folds into the slot on the earcup 2 Gently pull the ear cushion skirt up and away from the earcup 3 Properly align the replacement ear cushion with the earcup 4 Tuck an edge of the ea...

Page 29: ...face turn the headset upside down Remove the old cushion from the headband 2 While still holding the headband open align the center of the new cushion with the center of the headband and press firmly from the center toward the outside Microphone assembly or terminator cover replacement Replace the microphone assembly or terminator cover as described in Attaching the microphone assembly on page 10 ...

Page 30: ...age 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 No active Acoustic Noise Cancelling noise reduction and no communication Make sure the headphone plugs are securely inserted into the panel connector...

Page 31: ...No stereo separa tion or communica tions in one ear only If your aircraft has a mono audio system verify that the Intercom MON ST switch is set to MON Refer to The operation switch es on page 11 12 Depending on how your audio jacks are wired there may be only one channel of audio supplied to the headphone jack If the Intercom MON ST switch is set to ST and you only hear commu nications on one side...

Page 32: ... 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 Crackling sound audible ...

Page 33: ...and the AUX source On the headset make sure the terminator cover is in place and properly connected Refer to Attaching the microphone assembly on page 10 Cannot hear intercom com munications while listening to audio from AUX source Make sure the headset is firmly connected to the intercom radio system Make sure the 3 5 mm AUX audio cable is firmly connected to the control module and the AUX source...

Page 34: ...reconnect to a previously connected device Make sure the device is in range of the headset 30 feet or 10 m On the control module make sure the Bluetooth feature is on and the Bluetooth indicator is flashing blue If not press once On the control module make sure the Secondary Audio Mode selector is in the MUTE or MIX position On your device make sure the Bluetooth feature is on On your device delet...

Page 35: ...the connector into a cutout using the diagrams below as a guide 12 5mm 49 55 14 0mm RED 1 V IN BLK 2 GND WHT 3 COMM L BLU 4 COMM R WHT 5 MIC HI WH BLU 6 MIC LO BLK WH BLK WH Pin 6 Pin 1 Aircraft Interface Schematic Receptacle Pinout front view Connect the eight wires as follows Two for the microphone Two for audio One for power One for ground Two for audio shields Audio and microphone wires should...

Page 36: ...I 6 MIC LO RED BLK WHT BLU WHT WHT BLU BLK WH BLK WH Ring audio Existing PTT switch and wiring no connection to Bose headset Microphone Jack TPP PTT Barrel gnd Headphone Jack Barrel audio gnd Tip phone audio Existing wiring to aircraft intercom audio panel Stereo connection diagram Existing wiring to aircraft stereo intercom audio panel 10 32 V DC 1 2A 1V IN 2 GND 3 COMM L 4 COMM R 5 MIC HI 6 MIC ...

Page 37: ...ect pins 3 and 4 together and to the tip of the existing phone jack 5 White MIC HI Microphone Hi audio Connect to the portion of the existing microphone jack that corresponds to the ring position of a headset microphone plug Do not connect to the tip PTT segment 6 White Blue MIC LO Microphone Lo ground Connect to the portion of the microphone jack that corresponds to the barrel position of a heads...

Page 38: ...ient noise level 115 dBC SPL for full active noise reduction performance Power source Battery powered Two 2 AA alkaline Aircraft powered 10 to 32 VDC Voltage Battery powered Two 2 AA alkaline batteries Aircraft powered 10 to 32 VDC Battery life Alkaline battery life At least 45 hours in typical general aviation aircraft noise Duration varies with battery age ambient noise levels temperature ear cu...

Page 39: ...osphere Passed Environmental categories cited refer to RTCA DO 160F and RTCA DO 214 March 2 1993 The conditions and tests required for TSO approval of this are minimum performance stan dards It is the responsibility of those installing this article either on or within a specific type or class of aircraft to determine that the aircraft installation conditions are within the TSO stan dards TSO artic...

Page 40: ...rranty product registration card included in the product carton The warranty information provided with this product does not apply in Australia and New Zealand See www Bose com au warranty or www Bose co nz warranty for details Limited warranty service To return your headset to Bose for repair Return your headset using the following procedures 1 Contact the Bose organization in your country region...

Page 41: ... 109 Online www Bose com www global Bose com www owners Bose com www facebook com BoseAviation instagram com BoseAviation twitter com BoseAviation Ordering parts and accessories The following accessories and customer replaceable parts can be purchased directly from Bose Additional control module cable Specify Bluetooth technology or conventional module Specify Connector type Ear cushion kit Headba...

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Page 44: ... 2017 Bose Corporation The Mountain Framingham MA 01701 9168 USA AM746706 0020 Rev 00 ...

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