Telex Airman 750, Airman 760 Maintenance & Overhaul Manual
Airman 750 / 760 Headset and Headphone
Maintenance & Overhaul Manual for Airman 750/760 Headset & Headphone
F.01U.311.532 Rev. 09
Component Maintenance Manual
August/2018
2 Airman 750/760
Record of Revisions
Rev No. Revision Date Change Description
A 12/1988
B 06/1989
C 01/1990
D 11/1993
E 03/1995
F
G 06/2000
7 07/2017 This document was completely rewritten and a Bosch part number (F.01U.311.532)
8 09/2017 • Updated revision on front cover
9 08/2018 • Minor formatting and parts list updates
04/1996
See previous revisions of 38108-965 for affected changes
was assigned.
• Removed the Insertion Date column from this table.
• Technical Support Contact information updated
• In the models covered table, updated part number type-o
Airman 750/760 3
Purpose of Manual
This manual, Bosch part number F.01U.311.532, contains information for the overhaul and servicing of the Airman 750/760
headsets.
Technical Support
A liaison between the customer and factory is provided by the Bosch Product Support Department. Consultation and
assistance on technical problems, part information, and availability of local and factory repair facilities is available. When
writing, include all information concerning problem and mail to:
Bosch Communications, Inc.
8601 Cornhusker Hwy
Lincoln, NE 68507 U.S.A.
Attn: Air
craft Product Support Mgr.
Telephone: 800-89
Email:
telexdispatchtechsupport@us.bosch.com
8-6723 OPT 4, 3, 1, 1
Parts Ordering
Replacement parts may be ordered from our parts department. When ordering, please include the following information:
• Headset Model Number
• Part Description
• Part Number
• Quantity
Contact Information:
Bosch Communications, Inc.
8601 Cornhusker Hwy. Dock B
Lincoln, NE 68507 U.S.A.
Attn: Parts
Telephone: 800.289.0096 option 5
E-mail: repair@us.bosch.com
Department
Repairs
In order to maintain the FAA certification, all repairs to the headset must be made only by persons authorized under Part 43 of
the Federal Aviation Agency regulations or the local regulations for your location. Bosch offers full support, repair, and
certification.
4 Airman 750/760
Table
of
Contents
CHAPTER 1
Description & Specifications .................................................................................................................... 7
1.1 Description/Specifications ....................................................................................................... 7
CHAPTER 2
Parts List and Disassembly/Assembly..................................................................................................... 11
2.1 Parts List................................................................................................................................. 11
2.2 Disassembly/Assembly .......................................................................................................... 15
CHAPTER 3
Wiring / Connectors ................................................................................................................................ 19
3.1 Wiring/Connectors ................................................................................................................. 19
1.1.1 General Description ........................................................................................................ 7
1.1.2 Models Covered ............................................................................................................. 8
1.1.3 Specifications ................................................................................................................. 8
2.1.1 General .......................................................................................................................... 11
2.1.2 Airman 760, Catalog Number 64400-200..................................................................... 12
2.1.3 Airman 750, Catalog Number 64300-200, -205, -208, -210, -212, -218, -219, -220, -300
12
2.2.1 Disassembly .................................................................................................................. 15
2.2.1.1 Removal of the Receiver Assembly.................................................................... 15
2.2.1.2 Removal of the Cord Assembly ........................................................................... 15
2.2.1.3 Removal of the Circuit Board and Boom Assembly (Airman 750)..................... 16
2.2.1.4 Removal of a Glider ............................................................................................. 17
2.2.2 Assembly....................................................................................................................... 17
3.1.1 Airman 750 Wiring Diagrams....................................................................................... 19
3.1.1.1 Catalog Numbers 64300 -200, -220, -300........................................................... 19
3.1.1.2 Catalog Number 64300 -210................................................................................ 20
3.1.1.3 Catalog Numbers 64300 -205, -208 ..................................................................... 20
3.1.1.4 Catalog Number 64300 -212................................................................................ 21
3.1.1.5 Catalog Number 64300 -218................................................................................ 21
3.1.1.6 Catalog Number 64300 -219................................................................................ 22
3.1.2 Airman 760 Wiring Diagrams....................................................................................... 22
3.1.2.1 Catalog Number 64400-200................................................................................. 22
3.1.3 Airman 750 Connectors ................................................................................................ 23
3.1.3.1 Connector View for Catalog Numbers 64300-200, -212, -300............................ 23
3.1.3.2 Connector View for Catalog Number 64300-205, 208, 210................................ 23
3.1.3.3 Connector View for Catalog Number 64300-218................................................ 24
3.1.3.4 Connector View for Catalog Number 64300-219................................................ 24
3.1.3.5 Connector View for Catalog Number 64300-220................................................ 25
3.1.4 Airman 760 Connectors ................................................................................................ 25
3.1.4.1 Connector View for Catalog Number 64400-200................................................ 25
6 Airman 750/760 CMM
CHAPTER 4
Maintenance............................................................................................................................................. 27
4.1 Microphone Validation and Adjustment................................................................................. 27
4.1.1 Microphone/Amplifier Sensitivity Check...................................................................... 27
4.1.2 Microphone Sensitivity Adjustment .............................................................................. 28
4.2 Circuit Board - 200/300 Series Airman 750 ........................................................................... 29
4.2.1 Testing the Circuit Board Assembly.............................................................................. 30
4.3 Speaker Validation.................................................................................................................. 30
4.3.1 Speaker Sensitivity and Frequency Response Verification ........................................... 30
4.4 Mechanical Maintenance ........................................................................................................ 31
4.4.1 Cleaning the Unit ........................................................................................................... 31
CHAPTER 5
Troubleshooting ....................................................................................................................................... 33
5.1 Troubleshooting Chart ............................................................................................................ 33
1.1 Description/Specifications
1.1.1 General Description
The Telex Airman 750 Headset and the Airman 760 Headphone are designed and engineered for
high-quality aircraft communications. The Airman 750 is approved for aircraft use under the Federal
Aviation Agency TSO C57a and C58a. The Airman 760 is approved for aircraft use under the
Federal Aviation Agency TSO C57a.
CHAPTER 1
Description & Specifications
The Airman 750 Headset features a miniature, noise-canceling electret microphone element which
provides superior hum rejection. The microphone is mounted upon a boom which pivots 310 degrees
for use on either side of the user's head. The headset amplifier has an adjustable gain control and
provides output levels equivalent to carbon microphone levels. Several variations of the 750 headset
exist; each model has a different connector and a unique wiring diagram.
The Airman 760 Headphone is designed for users who operate hand-held microphones. The 760 is
virtually identical to the 750 headset, without the boom microphone.
8 Description & Specifications Airman 750/760 CMM
1.1.2 Models Covered
TAB L E 1 . Airman 750/760 Models and Connector
Model Number Description Connector
Airman 750
64300-200 Double side headset, 2x PJ, 150 PJ-068/PJ-055 (or equivalent)
64300-205 Double side headset, 2x A5M, 150 XLR 5-pin Male
64300-208 Double side headset, 2x A5M, 150, 7ft XLR 5-pin Male
64300-210 Double side headset, 2x A5M, 600 XLR 5-pin Male
64300-212 Double side headset, 2x PJ, 600 PJ-068/PJ-055 (or equivalent)
64300-218 Double side headset, 2x PJ, 150, 8ft PJ-068 (or equivalent)
64300-219 Double side headset, XLR A4F, 150 XLR 4-pin Female
64300-220 Double side headset, 2x PJ, 150 PJ-068/PJ-055 (or equivalent)
64300-300 Single side headset, 2x PJ, 300 PJ-068/PJ-055 (or equivalent)
Airman 760
64400-200 Double side headphone, PJ, 150 PJ-055 (or equivalent)
IMPORTANT: Model 64400-000, -203 and Models 64300-000, -005, -105, -008, -108, -010, -110, -012, -112, -016, -
116, -018, -118, -019, -119, -020, -120, -021, -121, -022, -122, -201, -216 are no longer supported and
are not covered in this CMM.
1.1.3 Specifications
Receivers
Type: Dynamic
Impedance:
150
64300-200, -205, -208, -218, -219, -220;
64400-200
300
64300-300
600
64300-210, -212,
Frequency Response: 100
Sensitivity: 90dB SPL ±5dB at 1kHz, 1mW input
-3000 Hz
Microphone (Airman 750 only)
Type: Noise-canceling amplified electret
Matching Impedance: 50
Frequency Response:
Model 750 – 300-5000Hz within limits shown below
-600
Airman 750/760 CMM Description & Specifications 9
Sensitivity:
ref. 1V/bar @1kHz, 12VDC
-5
-44 +2/-1dB (-220)
Operating Voltage: 8-16
Vdc (470 Ohm load)
Approximate Gross Weight:
750
Single-Sided 4oz. (113g)
Double-Sided 4.8oz. (136g)
760 3oz. (85g)
Approximate Wearing Weight:
750
Single-Sided
Double-Sided 3.2oz. (91g)
760 2.2 oz. (62g)
2.3oz. (65g)
Plug Type:
Varies by model. Refer to Table 1 on page 8
1 +3/-3dB (All versions except -220)
Cord Length:
Varies by model. Refer to parts list
10 Description & Specifications Airman 750/760 CMM
2.1 Parts List
2.1.1 General
When replacing parts, consult Figure 1 on page 16 and the parts list. Using the model
number located on the headband assembly, select the correct part number from Figure 2.1.3,
“Airman 750, Catalog Number 64300-200, -205, -208, -210, -212, -218, -219, -220, -300,”
on page 12 or “Airman 750, Catalog Number 64300-200, -205, -208, -210, -212, -218, -219,
-220, -300” on page 12.
CHAPTER 2
Parts List and Disassembly/Assembly
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