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Bose A20 Using the dual general aviation plugs, Using other plug types, Microphone Intercom/Audio

Models: A20

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PREPARING THE HEADSET FOR USE

Using the dual general aviation plugs

The most common battery powered (only) 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 other plug types

The Bose® A20® Aviation Headset is also available with other types of plugs for connecting to various aircraft audio jacks. These single-plug connectors should be inserted into the appropriate jack on your aircraft control panel. Refer to “Power and cable variations” on page 7.

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Bose A20 manual Using the dual general aviation plugs, Using other plug types, Microphone Intercom/Audio

Contents

A20 AVIATION HEADSET Owner’s GuideSAFETY INFORMATION Important Safety InstructionsWarning Choking CONTENTS USING THE HEADSETADVISORIES INTRODUCTIONHEADSET CARE AND MAINTENANCE TROUBLESHOOTINGINSTALLATION SERVICE AND WARRANTY INFORMATIONOperational advisory ADVISORIESHearing safety Volume controlUsing audio sources Recognizing aircraft soundsHeadset earcup requirements Earcup inner screenTriPort opening Microphone opening Earcup inner screenWhat’s included INTRODUCTIONHeadset assembly What’s in the cartonAccessories Control module variations Power and cable variations Battery powered optionsDual powered options INTRODUCTIONAttaching the microphone assembly The microphone assemblyPREPARING THE HEADSET FOR USE The battery compartment Opening the battery compartmentThe operation switches To change the operation switchesAuto Off functionality Inserting and replacing the batteriesTo insert or replace the batteries Connecting the headset to the aircraft Using the 6-pinplugTo connect the headset To disconnect the headsetUsing other plug types Using the dual general aviation plugsMicrophone Intercom/Audio Wearing and adjusting the headset USING THE HEADSETMicrophone placement Conditions related to fitClothing clips Mic label Mic is 1/2 inch from mouthMic is too far away Mic label is not facing mouth Press to open clipUsing the control module Power buttonPower indicator Volume controlAuxiliary AUX audio input Audio priorityMultifunction/Audio priority switch PositionFunction OperationUsing the headset with a Bluetooth-enabledphone Pairing the headset with your phoneBluetooth indicator light status Reconnecting to a previously connected phoneRecovering a lost connection Disconnecting a Bluetooth technology-enabledphoneBluetooth volume control To clear pairing device history from the headsetMaking and answering calls To make a callTo answer a call To end a callCleaning the headset General cleaningHEADSET CARE AND MAINTENANCE Instructions for continued airworthinessReplacing parts Microphone windscreen replacementMicrophone windscreen Headband cushionBattery replacement Ear cushion replacementReplacing the ear cushions Microphone assembly or access cover replacement Headband cushion replacementStorage TROUBLESHOOTING In case of difficultyNoise Reduction CommunicationsAudio ProblemProblem TROUBLESHOOTINGAuxiliary audio input ProblemProblem TROUBLESHOOTINGBluetooth wireless technology Auto offProblem ProblemMounting the aircraft panel connector INSTALLATIONStereo connection diagram Mono connection diagramINSTALLATION Details on making the connections Helicopter U174 connection diagramINSTALLATION Pin numberTECHNICAL INFORMATION Condition FAA Technical Standards OrderCategory Warranty Limited warranty serviceSERVICE AND WARRANTY INFORMATION Locating the headset serial numberOrdering parts and accessories Contact informationSERVICE AND WARRANTY INFORMATION Page 2012 Bose Corporation, The Mountain Framingham, MA 01701-9168USA AM325453 Rev.07