Bose X User's Manual
Contents
1. CAUTION The ba ttery compartment is designed to prevent inadvertent Figure 22b Use of rechargeable batteries while possible will alter the accuracy of the battery power indicator Close the battery door reverse polarity from installing the batteries incorrectly If the batteries do not seem to fit correctly do not force them in Forcing an improper con nection will cause permanent damage to the control module HEADSET CARE AND MAINTENANCE Figure 23 Removing and attaching the headband cushion Battery door replacement 1 Slide the battery door down using the finger indent and lift open 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 the cushion be replaced after regular care and maintenance fails to restore the wool pile to its original size and shape To replace the cushion Figure 23 1 Ona protected surface turn the headset upside down With another person holding the headset open for you remove the old cushion from the magnesium headband 2 With the headband still held open align the center of the new cushion with the center of the headband and press firmly from the cen2. Owner s Guide DECLARATION OF CONFORMITY We the offerer Bose Corporation The Mountain Framingham MA 01701 9168 USA Acknowledge our sole responsibility that the product Kind of equipment Bose Aviation Headset x Type Designation AHX 32 0 and AHX 34 0 In accordance with EMC Directive 89 336 EEC and Article 10 1 of the Directive is in compliance with the following norm s or documents s Technical regulations EN55013 EN55020 Accredited by Bose Corporation The Mountain Framingham MA 01701 9168 USA Nic Merks 15 June 2003 Bose Products B V Vice President Europe Nijverheidstraat 8 1135 GE Edam Manufacturer s authorized EU representative The Netherlands CAUTIONS AND ADVISORIES Operational advisory Figure 1 On Off switch on a the battery powered headset and b the aircraft powered headset The Bose Aviation Headset X is an active noise reducing ANR headset As with any complex electronic device it is possible for this headset to fail during operation Symptoms of failure may include loud tones distortion and loss of communications signal in the headset when used in the ANR mode Note The headset includes redundant circuitry to reduce the effects of such failures and allow for continued use of the headset in the ANH mode If you experience loud tones and the related loss of communications turn off the power switch The headset will continue to provide com
3. 4 Adjust the volume knobs on the headset control module to balance the volume between the left and right earcups Turn ANR back ON Turn down the aircraft intercom or radio master volume to the level you prefer After the pilot s headset volume is set passengers may adjust the volume of their headsets Have them follow steps 1 and 2 under See Controlling the volume of a single aircraft powered headset on page 24 Battery power indicator New alkaline AA batteries IEC LR6 will generally supply 30 to 40 hours of power for the headset Battery life varies with the ambient noise level of the aircraft temperature ear cushion condition and age of the batteries USING YOUR HEADSET An LED located on the control module changes color to indicate the power status as follows LED Color Type of light Indicates Green Blinking Power ON and batteries good Amber Fast blinking Power ON but batteries low 8 hours or less remaining Red Faster blinking Power ON but batteries very low 2 hours or less remaining Off None Power OFF or batteries dis charged Operating the aircraft powered headset Power switch Turn on ANR by setting the power switch to ON Figure 19 Figure 19 Volume control The volume control knobs left ear and power switch on the aircraft powered headset control module Volume control right ear Power switch Volume control Overall headset volume control requires adjustments at
4. aviation aircraft noise Battery life varies with ambient noise level temperature ear cushion condition and age of batteries Operating 25 ma in typical aircraft noise amp fast blow fuse AGC amp fuse or l5 amp circuit breaker TECHNICAL INFORMATION Headset weight 12 ounces 340 grams on the head when cable is supported by the mounting clip Headset size Breadth 4 8 to 6 3 inches range Height 4 5 to 5 7 inches Temperature and Operating 5 to 131 F 15 to 55 C vea Storage 67 to 158 F 55 to 70 C Category A Altitude 15 000 feet maximum pressure alti tude for full cancellation FAA Technical Standards Order The Bose Aviation Headset x including its interface cables and electret boom microphone is FAA approved to TSO C 57a and C 58a It has been designed to function in or withstand exposure to the following environmental conditions Condition Category AF Conducted Susceptibility B Humidity B Magnetic effect B Power input B RF susceptibility T Temperature amp altitude A1 Vibration S amp U Voltage spike A Shock drop 12 times 1m onto concrete Environmental categories cited refer to RTCA DO 160D July 29 1997 and DO 214 March 4 1993 33 SERVICE amp WARRANTY INFORMATION Warranty period Service Limited 5 year warranty Bose Corporation warrants this headset to be free from defects in materials and workmanship for a period of five years from the date of purchase
5. munications in the passive noise reducing mode ANR mode is active when the headset control module power switch is set to ON Figure 1 or when the battery power indicator is lit The headset is in the passive mode when the power switch is set to OFF or when the battery power indicator is unlit Battery power indicator Power switch Power source Your headset is one of two types battery powered or aircraft powered If your headset is battery powered make sure it is connected only to battery power If your headset is aircraft powered connect the head set to the aircraft power sources only as described in this guide An aircraft powered headset will not operate properly if used with a Bose Series ll Aviation Headset battery pack or with any commercial battery pack CAUTIONS AND ADVISORIES How use of the headset affects hearing safety The headset is intended for use with ANR turned on Noise reduction and communications performance are reduced with ANR turned off Volume control Make sure your aircraft communications system volume control is easily accessible This control affects the strength of the communi cations signal coming into the headset whether ANR is on or off As pilot in command you must be sure you can understand critical communications even with ANR off In this case you may need to turn up the aircraft communications system volume Avoid setting the volume controls at levels high enough t
6. refers to the year of manufacture 2003 The last three digits 192 refer to the day of the year the 192 day of 2003 Decide where you want the boom microphone Depending on the headset configuration you purchased your head set may arrive with the boom microphone cable attached to the left earcup or packed separately in the carton In either case you can attach the boom microphone cable to either earcup as preferred Before you remove or attach the microphone however be sure to GETTING YOUR HEADSET READY FOR USE note the important markings for left L and right R above each ear cup These markings indicate which ear each earcup is intended to fit over Removing an attached boom microphone cable 1 Use a flat tipped screwdriver to loosen the two screws at the base of the boom microphone cable assembly 2 Pull the cable assembly straight out from the earcup to which it is attached Figure 6 CAUTION Do not twist the boom microphone cable while discon necting it Twisting can damage the connector pins Figure 6 Pulling the cable assembly straight out from the earcup L for left Connector assembly pins Attaching the boom microphone cable Before you attach the boom microphone make sure that the cable connector and its earcup connector are clean and free of debris 1 Useaflat tipped screwdriver to loosen the two screws on the access cover near the bottom of the earcup where you want to a
7. Ear cushion life will vary with use Ear cushions carry a six month limited warranty against manu facturer s defects Contact Bose for e Spare parts and accessories See page 35 e Technical advice e Installation information e Warranty and repair information To return your headset to Bose for repair 1 Call to request return authorization instructions from Bose 2 Clearly mark the return information given to you on the outside of the package 3 Enclose your name address daytime telephone number and e mail address along with a description of the problem Securely pack the headset 5 Werecommend that you insure the headset and use a transport service that provides a tracking number 6 Send your headset to this address Contact information 34 Bose Aviation Headset Department 145 Pennsylvania Avenue Framingham MA 01701 9168 USA TEL 1 800 233 4416 US 508 879 7330 ext 62006 outside US FAX 1 508 766 5997 SERVICE amp WARRANTY INFORMATION European Headquarters Noise Reduction Technology Group Nijverheidstraat 8 NL 1135 GE Edam TEL 31 0 299 390150 FAX 31 0 299 390109 E MAIL aviation europeQbose com World Wide Web www bose com Ordering parts and accessories The following accessories and customer replaceable components may be purchased directly from Bose Refer to contact information on page 34 e Additional control module cable Specify battery powered or aircraft powered e
8. Jack TPP PTT 1 LLL Stereo headphone Jack Barrel m gnd Barrel 6 Existi I ond oF swi wiring RED 1 V4IN BLK 2 GND 3COMML 4 COMM R 5 MICHI 6 MIC LO audio tane iQ esing pT gna s and wiring no connection to Bose headset Headphone Jack Barrel Tip phone audio p gnd 1 V IN 2 GND 3COMML 4 COMM R 5 MICHI 6 MIC LO Audio Existing PTT switch and no connection to Bose headset 6 MICLO 5 MICHI 4 COMM R 3 COMM L 2 GND 1V IN Existing single 4 prong jack Barrel M audio gnd UsiNG YOUR HEADSET Wearing it properly Proper fit on your head is important both for comfort and good noise reduction performance Here are a few guidelines e Use the left L and right R markings above the earcups to orient the headset propery Figure 16 Figure 16 Matching the R and L markings to your right and left ears e Use a light grasp to adjust each earcup so its cushion is com pletely over your ear and you feel an even gentle pressure all around it e Adjust the headband so it rests gently on top of your head Make your final adjustments in a noisy environment and with the power switch set to ON Conditions related to fit A low rumbling sound or frequent brief losses of active noise reduc tion ANR may indicate an improper fit or blocked earcup ports Refer to Headset Care and Maintenance on page 25 for instruc tion
9. ae ate Rea Iq 30 I case OF dI eulty uuu e CERES ee hat ope Ac Gia cata SAA 30 T cnica IDIOFTIR OPI See Cade CE ne t DES CAU Irc C S RR Rod 32 FAA Technical Standards Order 2 000 eee eee 33 Service amp Warranty Information 0 0 0 eee ees 34 Waranty Pernod 3242 2 2 1 20e eee a ak eee Cg Se Robo dod 34 velo Me c r 34 To return your headset to Bose for repair 34 Contact Information a siet Ge nk ac ee e wo use V ce at a e eR 34 Ordering parts and accessories 0 cee ees 35 INTRODUCTION We appreciate your choice Congratulations on your purchase of a Bose Aviation Headset x This headset combines Bose Acoustic Noise Cancelling headset technology to electronically reduce unwanted aircraft noise and Bose TriPort headset technology for a smaller lighter more comfortable headset that delivers full spectrum noise reduction We believe it is the finest aviation headset you can own Headset and cable variations The Bose Aviation Headset X is available in variations designed for general aviation and helicopter use There are also battery powered and aircraft powered versions Figure 4 on page 9 The communications cable for your headset may be either straight or coiled depending on the headset configuration you have purchased Features common to most variations e Acoustic Noise Cancelling headset technology e TriPort headset technology e Communications cable with integr
10. latching preci sion designed quick connector is designed for panel mounting and mechanically keyed to ensure proper mating Attaching and removing the cable When the quick connector is installed the cable leading from the control module connects to it Match the narrow bar on the cable end to the slot on the connector Press in until the two parts engage Figure 11 on page 15 To release the cable pull back on the sleeve near the end of the cable Then gently remove the cable from the connector GETTING YOUR HEADSET READY FOR USE A CAUTION Do not attempt to pull the connector out without first pull ing back on the sleeve Forcing the connector out will cause damage to the cable and or your aircraft instrument panel Figure 11 d S nd IPS l Slide sleeve Attaching and removing the Align keyway to release cable X e Mounting the connector Mount the connector into a cutout as shown in Figure 12 below Connect the eight wires as follows e Two for the microphone e Two for audio e One for power e One for ground e Two for audio shields Audio and microphone wires should be connected to the back of the existing microphone and headphone jacks leaving existing jacks intact for use with conventional headsets This is usually the fastest installation method Also refer to Figures 13 15 on page 18 Figure 12 126m PU ue Rm cc m AIRCRAFT INTERF ACESCHEMA TIC Harness connector and
11. your lips Operating the battery powered headset 20 If your headset is battery powered read the control information below If your headset is aircraft powered refer to Operating the air craft powered headset on page 23 The battery powered headset uses AdaptiSense headset tech nology to supply the power your headset needs at any given time Smart shutoff turns off the circuitry several minutes after you remove the headset This maximizes available energy for longer life from the two batteries A tri color LED provides real time battery status Its brightness is adjustable for day night operation USING YOUR HEADSET Figure 18 The LED volume control knobs and power switch on the contro module of a battery powered headset Power button Use the power button to turn the headset on or off or to change the LED brightness Figure 18 e Press the power button once to turn on ANR e 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 e Press twice rapidly to toggle between the daytime brighter and nighttime dimmer LED settings Battery power indicator Volume control Volume control right ear left ear On Off control symbol Power button for On Off and LED mue Mes brightness setting control symbol Vol
12. Ear cushions e Carry bag e Windscreen with attachment band e Aircraft panel connector installation kit e Battery door e Fleece headband cushion 35 20261 MUIE Better sound through researche 2006 Bose Corporation The Mountain Framingham MA 01701 9168 USA AM270261 Rev 01
13. acement contact the Bose Aviation Headset Department Refer to Contact information on page 34 If the screen gets wet or any foreign objects become lodged on or adjacent to it follow the instructions in Headset Care and Maintenance on page 25 Storage Do not store the headset in an unventilated area or in direct sunlight If your headset is battery powered remove the batteries before storing the headset for extended periods CONTENTS Cautions and Advisories llle 3 Operational advisory eee ees 3 l OWeI SOUEGG su ds dU eoe ete sb a RUPEE Ss vta ra tics ded d 3 How use of the headset affects hearing safety 4 VOlUEie CODO 3 4 idee qr b diets dee On mtr al e ee Me seh de t do deis 4 Listening to the sounds of your aircraft lus 4 Using entertainment audio sources ees 4 Other calti ls iud uarias o eu init hecta tio de a Oden es don da 4 TriPort amp headset earcup requirements 4 Edrcup inner screen ura See es or EUR ee xU Ren ain 5 DIOlAIG as decide utei ES Ce mpeg ui DAS MEL M ea Sie 5 OST US puaran erae AI Ei OQ NU REPRE AO Ut kr o ae ee qi arva dua eta 6 INEFOGUCTION prr bee ce eae st CUS See SES kee es 8 We appreciate your choice 1 eee 8 Headset and cable variations lere 8 Getting Your Headset Ready for Use 0000 eee eee 10 Locate the serial number for your product regi
14. ated control module e Flexible microphone boom with continuous position adjustments e Adjustable headband e Replaceable ear cushions e Replaceable fleece headband cushion e Replaceable windscreen e Cable mounted clothing clip INTRODUCTION Figure 4 The a battery powered and b aircraft powered versions of the headset GETTING YOUR HEADSET READY FOR USE Locate the serial number for your product registration card Figure 5 Locating the serial number under the head band cushion 10 The Bose Aviation Headset x includes a product registration card in the carton Please fill in the requested information and mail it to Bose We will use this information to provide you with appropriate advisories and updates Be sure to include your headset serial number which is located on the underside of the magnesium headband underneath the headband cushion Headband cushion Serial number After locating your headset serial number be sure to properly replace the headband cushion by pressing down firmly For more information on replacing the headband cushion see Headband cushion replacement on page 29 Date of manufacture Your headset s date of manufacture is an important part of your serial number It is the underlined four digit number that begins just after the first alphabetic letter in the serial number Example 031963E31920040E In this example the date of manufacture is 3192 The first digit 3
15. both the air craft intercom or radio and at the headset control module Even at its lowest setting neither knob on the control module can completely turn off the volume 23 USING YOUR HEADSET 24 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 e Use the left knob to adjust volume in the left earcup e Use the right knob to adjust the volume in the right earcup Controlling the volume of a single aircraft powered headset With ANR turned on 1 Set the aircraft communication system to a safe operating level Note If you are connecting the headset to your aircraft for the first time turn down the master output level of your radio intercom system to avoid exposure to high volume levels 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 aircraft has more than one headset connected to its audio system the pilot in command should adjust the volume of his her Bose Aviation Headset x as follows 1 Turn off ANR by setting the power switch to OFF 2 Turn up each volume knob on the headset control module to its maximum 3 Adjust the master volume on y
16. connecting pins 3 amp 4 and pins 5 amp 6 are shielded twisted pairs with a black wire shield termination exiting each pair If existing wiring is not shielded connect shields to existing audio wiring shields or connect shield from Comm L and Comm R wire pair to audio ground The Bose aircraft panel connector cannot be installed to an audio system using transformer coupled audio outputs Call the Bose Avia tion Headset Department for details Use proper adhesives Adhesives approved for use with this connector are e Ciba Geigy Uralane 5754 A B e Lord 710 e VICS 6 Vibratite Do not let cyanoacrylate based adhesives flux remover or other caustic compounds contact the connector body These chemicals cause irreparable damage to the connector For information on chemical compatibility and connector part number call LEMO USA Santa Rosa CA at 1 800 444 5366 17 GETTING YOUR HEADSET READY FOR USE Mono stereo and helicopter connection diagrams Figure 13 ee Diagram of connections for a mono signal Existing wiring to aircraft intercom audio panel Figure 14 1032 A dii iiid is NN Woo i feo Diagram of connections to WHT aircraft stereo jacks ae WHT BLU BLK Microphone Jack TPP t he audio right Tip phone audio let Figure 15 Diagram of connections to a helicopter single jack Existing wiring to helicopter intercom audio panel 18 R BLK BLK Ring Microphone
17. he seal around your ear Make sure that your ears are completely inside the ear cushions and that a hat or eyeglasses with thick temples do not interfere with the seal e Check ports at the outside surface of each earcup to ensure they are not blocked If dust or dirt is present carefully remove the debris using tweezers Do not blow out or vacuum debris e nspect the seal between the ear cushion skirt and the earcup The skirt should enclose the earcup evenly without gaps Replace any cushions that have surface tears torn stitching joints large wrinkles or have become dried and stiff Crackling sound audible with Adjust the earcup fit to eliminate the crackling sound Refer to headset turned on in a loud Wearing it properly on page 19 Te OT ASENG e 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 that the voltage powering the headset is greater than 10 VDC e 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 No active noise reduction e Check boom microphone cable connection on the bottom of and no communication the earcup CAUTION Do not attempt to disassemble or service the inside of the earcups or other parts of the headse
18. i schematic A 7 RED a avan id a wat T i 3 COMML RECEPT ACLE PINOUT FRONT VIEW E ee j cio PIN 1 PIN 6 15 GETTING YOUR HEADSET READY FOR USE Details on making the connections The pinout for the optional installed connector is Headset o 10 32 VDC Use a amp fuse or a amp circuit breaker Black System ground Connect to the existing audio ground Phone communication L eft Phone communication Right 5 White Microphone Hi audio Connect to the por tion of the existing microphone jack that corresponds to the ring position of a head set microphone plug Do not connect to the tip PTT segment White Microphone Lo ground Connect to the Blue portion of the microphone jack that corre sponds to the barrel position of a headset microphone plug Black Shield from Comm L and Comm R wire Comm pair Shield Mic Black Shield from Mic Hi and Mic Lo wire pair Shield 16 GETTING YOUR HEADSET READY FOR USE Notes For use with a stereo intercom connect the left and right channels to their respective positions For monaural operation connect pins 3 amp 4 together to the tip of the existing phone jack Do not use excessive force or bend the installed connector This may damage or break internal solder joints If the boom microphone works on radio transmit but not through the intercom check pin 6 It may be incorrectly wired to the PTT seg ment of the microphone jack The wires
19. ircraft powered version for instructions on volume adjustment Check the volume setting of intercom radio Check the headset aircraft connection Check stereo mono configuration switch See Changing the optional operation switches on page 13 Check the TriPort headset openings on the outside of each earcup to ensure they are not blocked If dust or dirt is present carefully remove the debris using tweezers Do not vacuum or blow out debris Check to see if the volume control is set too low Refer to Vol ume control on page 21 battery powered version or on page 23 aircraft powered version for instructions on volume adjustment Check stereo mono configuration switch See Changing the optional operation switches on page 13 TROUBLESHOOTING Stereo missing or communi If your aircraft has a mono audio system verify that the stereo cations in one ear only mono configuration switch is set to mono See Changing the optional operation switches on page 13 If the switch is set to stereo and the headset is plugged into a mono audio system you will hear only through the left earcup Squealing whistling or e Check to see if the protective inner screen is damaged chirping sound when the system is turned on Low rumbling sound with e Adjust the earcup fit to create a better seal on your head The headset turned on in a quiet headset s low force design makes it sensitive to items that environment interfere with t
20. liquid Microphone windscreen Remove the windscreen from the microphone as described in Microphone windscreen replacement on page 27 Wash the windscreen by immersing in mild soapy water Rinse air dry and reattach the windscreen Earcup inner screen Do not attempt to remove replace repair or clean this component Located inside the earcup the inner screen is critical to proper head set operation If the screen appears to cause operating problems contact the Bose Aviation Headset Department Replacement parts Heplacement parts can be ordered directly from Bose Corporation Please refer to Contact information on page 34 HEADSET CARE AND MAINTENANCE Replacing parts Figure 21 Pulling the ear cushion skirt away from the earcup 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 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 devices to dry the inner screen If the headset is immersed in liquid do not use it Contact the Bose Aviation Headset Department for assistance Through normal use parts like windscreens and ear cushions may require
21. n with new headsets Set it to B if you are installing a portable cable onto an older exist ing Aviation Headset x that was manufactured before June 2003 Note If you cannot determine the manufacture date of your headset refer to Locate the serial number for your product registration card on page 10 e Switch 6 Set at the factory for mono audio systems to provide audio in both ears Set it for stereo ST if your aircraft has a stereo intercom 13 GETTING YOUR HEADSET READY FOR USE Figure 10 Installing the two batteries Inserting batteries Insert the two supplied alkaline AA batteries IEC LR6 into the control module Figure 10 oy 000000 C IC 3 CAUTION The battery compartment is designed to prevent inadvert ent reverse polarity from installing the batteries incorrectly If the bat teries do not seem to fit correctly do not force them in Forcing an improper connection will cause permanent damage to the control module Preparing the aircraft powered headset for use 14 For an aircraft powered headset the cable is permanently installed in the aircraft CAUTION The aircraft panel connector must be mounted by a mechanic qualified to perform this type of avionics installation for the aircraft you are using If yours is an aircraft powered headset there is a connector on a 6 foot wiring harness that came in the carton This self
22. o impair your hearing during extended periods of headset use Listening to the sounds of your aircraft With the headset s active and passive noise reduction typical aircraft sounds from engines propellers warning alarms and other sound sources may not sound familiar We strongly advise you to make Sure you can hear and recognize these sounds when using the Bose Aviation Headset x while operating any aircraft Using entertainment audio sources When listening to in flight entertainment or a home audion source through a Bose Aviation Headset X be sure to limit the volume to safe levels that do not interfere with your ability to hear informational sounds and warning alarms such as stall warnings or gear up while piloting Other cautions TriPort headset earcup requirements Proper headset operation requires that the TriPort headset openings on the earcup are kept free of debris The TriPort headset openings Figure 2 on page 5 are located on the outside of each earcup and are comprised of two holes and a screen Figure 2 TriPort headset openings Figure 3 Protective inner screen inside the earcup CAUTIONS AND ADVISORIES TriPort headset openings Earcup inner screen The protective inner screen is critical to the headset s ability to reduce noise Figure 3 Farcup inner screen Do not attempt to remove replace or repair this screen If operating problems indicate the need for screen repl
23. our aircraft intercom or radio until you can hear communications clearly Note This should be done in a noisy environment 4 Adjust the knobs on the headset control module to balance the volume between the left and right earcups 5 Turn ANR back ON Reduce the master volume on the aircraft intercom or radio to the level you prefer After the pilot s headset volume is set passengers may adjust the volume of their headsets Have them follow steps 1 and 2 under Controlling the volume of a single aircraft powered headset above 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 performed by condition only CAUTION Do not immerse the headset in water or any other liquid Cleaning the headset Figure 20 TriPort headset openings on one earcup Clean only those parts listed below according to the instructions General cleaning Gently wipe the outside surfaces of the headband connectors plas tic parts and headband cushion using a soft cloth moistened with water and mild soa
24. p Take special care when cleaning the ear cush ions and the outside surfaces of the earcups as described below Earcup TriPort headset openings The TriPort headset openings shown in Figure 20 must remain clean and free of debris Check to be sure that openings are clean before each flight TriPort headset openings When wiping down the headset be sure not to force any dirt or debris into the openings Carefully use tweezers if necessary to remove foreign matter that may be lodged in the openings Do not blow air into or vacuum the openings 25 HEADSET CARE AND MAINTENANCE 26 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 e have a full beard or heavy whiskers e subject the headsets to severe temperature extremes such as parking your airplane outside in severe cold or heat e put excess strain on the headset due to improper storage Indications that the ear cushions need replacing include e flaking of the outer covering e cuts or tears e flattening of the cushion reducing the effectiveness of the seal To extend the life of the ear cushions perform regular cleaning as described in General cleaning on page 25 If the ear cushions require more vigorous cleaning remove them from the earcups as shown in Replacing parts on page 27 Do not immerse ear cushions in water or any other
25. periodic replacement Microphone windscreen replacement 1 Remove the band that secures the windscreen by rolling the band from the tip of the microphone 2 Gently pull the windscreen off of the microphone Slide on the replacement windscreen and make sure that it fits completely over the microphone 4 Roll anew band to the proper position about inch from the end of the windscreen to secure it Ear cushion replacement 1 Grasp the ear cushion skirt where it folds into the slot on the ear cup Figure 21 2 Gently pull the ear cushion skirt up and away from the earcup Y 27 HEADSET CARE AND MAINTENANCE Figure 22 a Sliding open the battery compartment door b Inserting new batteries into the control module bat tery compartment 28 3 Properly position the replacement ear cushion against 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 Slide the battery door down using the finger indent and lift open as shown in Figure 22a 3 Remove the old batteries Make sure that the battery compartment contacts are clean 5 Install two AA alkaline batteries IEC LR6 as shown in 6
26. s on how to deal with a blockage In very loud conditions such as during takeoff you may experience brief reductions in ANR as the headset compensates for a momen tary pressure change If this problem continues when the sound level returns to normal however refer to In case of difficulty on page 30 If the problem persists contact the Bose Aviation Headset Depart ment for assistance During a long flight you may feel a slight pressure point which can be relieved by adjusting the headband position Your experience with using the headset will help establish a sense of how it should sound and feel 19 USING YOUR HEADSET Figure 17 Properly placing the micro phone a wide side nearly touching your mouth not b farther away or c tilted Microphone placement Proper microphone placement is important for clear communica tions With the headset on your head make these adjustments 1 Grasp the boom with your fingers and move the microphone up or down so it is level with your mouth Figure 17 a b Mic is too far away g Mic label c Mic label is not facing mouth 4 Mic is inch from mouth 2 Pullthe microphone in toward your lips Position the microphone with its label side facing in Though it will be slightly off center the microphone should be inch from the opening of your lips 3 Make sure the broad side of the microphone is facing your lips Do not purse
27. stration card 10 Date of manufacture leere 10 Decide where you want the boom microphone 10 Removing an attached boom microphone cable 11 Attaching the boom microphone cable 11 COMINO C IND ae a de om denda tdeo dte Lots Pie iar ee ee ee 12 Preparing to use battery power lesen 13 Changing the optional operation switches 13 Inserting Dattertes 441 4 mane EXE SEE E Tid 14 Preparing the aircraft powered headset for use 14 Attaching and removing the cable cee aes 14 Mounting the connector 0 0 00 ce ee 15 Details on making the connections less 16 Use proper adhesives llle 17 Mono stereo and helicopter connection diagrams 18 USING Your Hedaddsel 2 etan ERE EEIBARCRMEDS ICE PTS 19 Wearing it properly i ccsutecasetet canara tae ced deeedaeeeee 19 Conditions related to fit lll llle 19 Microphone placement ees 20 Operating the battery powered headset 20 POWE DUMON d d nrat 4 os deri Ie oats hse arc tios cdm a Re deer atate s 21 Volume COMI Ol x 2 m 1 CE ioa ee oe he ee a ERE NUS 21 Notice the individual earcup controls 21 Controlling the volume of a single battery powered headset 22 Volume control using multiple headsets 22 Battery power indica
28. t Only the boom microphone cable connector access cover batteries battery cover windscreen and ear cushions are replaceable by the user For instructions on how to care for the headset and how to replace the ear cushions refer to Headset Care and Maintenance on page 25 31 TECHNICAL INFORMATION 32 Sound pressure levels SPL are relative to 20 micropascals Headphone Impedance Frequency response Microphone Electret Microphone Dynamic Maximum ambi ent noise level Power source Battery life Current Fuse breaker recommended Damage could occur to avionics equipment that is intended for use only with 600 ohm headsets If in doubt consult the avionics equipment manufacturer Monaural mode 160 ohms ON and 230 ohms OFF at 1 kHz Stereo mode 320 ohms ON 460 ohms OFF 15 Hz to 15 kHz Sensitivity 90 dB SPL typical measured at 1 mw 1 kHz full volume on KEMAR ear simulator Bias required 8 to 16 VDC through 220 to 2200 ohms Sensitivity Varies depending upon bias and radio AC input impedance Typical output is 600 mV at 114 dB SPL To assure proper modulation of the radio it is recommended that an avionics technician adjust its input to match the output of the microphone Impedance 5 ohms Sensitivity Equivalent to M 87 M 101 115 dBC and 105 dBA SPL Battery powered 2 AA alkaline IEC LR6 Aircraft powered 10 to 32 VDC Alkaline Up to 40 hours in typical general
29. ter toward the outside Headband cushion Note Removing and attaching the headband cushion may be easier if a second person holds the headset open Boom microphone cable or connector access cover replacement Heplace the boom microphone cable or connector access cover as described in Removing an attached boom microphone cable and Attaching the boom microphone cable on page 11 29 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 per sists contact the Bose Aviation Headset Department using the contact information on page 34 of this guide for assistance Problem Communication but no active noise reduction in either ear Active noise reduction but no communication or very low volume in both ears Reduced active noise reduc tion intermittent clicking sounds or communication distortion in a loud environ ment Reduced volume in one ear only 30 What to do Make sure the headset ANR is set to ON If using aircraft power check the aircraft fuse or circuit breaker If using battery power make sure that the batteries are fresh and correctly installed Check the battery power indicator Refer to page 22 for description of LED indicator Check to see if the volume controls are set too low Refer to Volume control on page 21 battery powered version or on page 23 a
30. the cable Figure 8 Moving the clothing clip M along the cable AN Press to release KA CAUTION Do not attempt to clip onto surfaces that are more than l inch thick 12 GETTING YOUR HEADSET READY FOR USE Preparing to use battery power Figure 9 Optional operation switches inside the battery compart ment The battery compartment on your headset control model serves two purposes In addition to holding the batteries it contains small switches Figure 9 that give you the option to change some of the factory set operation defaults for your headset ON C amp K S006 B O t g L12324556 O ms Changing the optional operation switches Note To change switch positions use a pen or a small flat tipped screwdriver to gently switch the tab e Switches 1 3 Not currently used e Switch 4 Set at the factory to enable the smart shutoff function To disable smart shutoff set switch to OFF With the switch in OFF position the ANR system will not turn off until the power button is depressed and held for at least one second Note The smart shutoff function is designed to detect when the headset is not in use and shut off ANR to preserve battery power Smart shutoff turns off circuitry several minutes after you remove the headset e Switch 5 Set to A at the factory for operatio
31. tor llle 22 CONTENTS Operating the aircraft powered headsSet 0 00 eee eee 23 OW ECL SWIC esr 12 6 atus en T Sa ah gece RUD a e Rh duse ah hese oq 23 VOIWME CONTON s havi sed Le eae ae Bae we ue p Bee eS 23 Notice the individual earcup controls 24 Controlling the volume of a single aircraft powered headset 24 Volume control using multiple headsets 24 Headset Care and Maintenance l l 25 Instructions for continued airworthiness 25 Cleaning the headset 0 0 eee eee eee 25 General cleaning sedans eeann p ce hte Re Rd e Uie A edd 25 Earcup TriPort headset openings 25 ale CUSIMOMS cp 26 Microphone windscreen eee 26 Earcup inner screen 1 0 0 00 ce ee ee 26 Replacement parts 2 000 cee ee ees 26 Headband eushlor sas oca Co RO CEA o TER Re Ee 27 Removing environmental moisture 2f Replacing pats 21 Sue dean ova aes m bo te MR Ie ae a apte 28 o aig 217 Microphone windscreen replacement 27 Ear cushion replacement anaana aaa 27 Battery replacement nanna anaa aaaea 28 Battery door replacement 0 0c cece ee eee 29 Headband cushion replacement 29 Boom microphone cable or connector access cover replacement 29 FOUDIESHOOUMG ser dasr wish etn xc EAD a Fl ee aur
32. ttach the boom microphone Remove the cover to reveal the connector pins on the earcup 3 Carefully line up the connector to the small connector pins on the panel Figure 7 on page 12 CAUTION An improperly aligned connector will not make the con nections neccessary for proper operation and may cause damage 11 GETTING YOUR HEADSET READY FOR USE Figure 7 Positioning the mic cable assembly on the preferred earcup Connector pins Cable Connector assembly pins 4 Press the assembly onto the connector pins until it is fully engaged and the cable assembly is flush with the earcup CAUTION Do not apply excessive force which may result in earcup damage o With the screw threads properly aligned tighten the screws 6 Rotate the microphone boom into position so it will be near your mouth when you put on the headset The label should be facing your lips Attach the access cover to the connector panel on the earcup that does not have the boom mic attached Align the screws and tighten them to secure the cover e f you moved the boom mic from one earcup to the other reuse the access cover you removed earlier CAUTION Be sure to try the headset and test its operation before flight Clothing clip Use the clothing clip Figure 8 for attaching the control module to your clothing a safety harness or an aircraft door pocket Pressing on the end of the clip allows you to reposition it along
33. ume control Notice the individual earcup controls Separate knobs on the control module control the volume for each separate earcup Figure 18 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 neither knob on the control module can completely turn off the volume CAUTION Avoid setting the volume levels too high Exposure to loud sounds may cause hearing damage 21 USING YOUR HEADSET 22 Holding the control module upright and facing you e Use the left knob to adjust volume in the left earcup e 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 aircraft has more than one headset connected to its audio system the pilot in command should adjust the volume of his her Bose Aviation Headset x as follows 1 Turn off ANR by setting the power switch to OFF 2 Turn each volume knob on the headset control module up to its maximum setting 3 Adjust the master volume on your aircraft intercom or radio until you can hear communications clearly Note This should be done in a noisy environment
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