Sennheiser HMD 46-3, Service Manual

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HME 46-3, HMD 46-3
02/2008 3/25
Contents
1 Outline dimension ..........................................................................................5
2 Technical Data.................................................................................................6
2.1 Headphones........................................................................................................... 6
2.2 Microphone of HMD 46-3.................................................................................... 6
2.3 Microphone of HMD 46-3(5) .............................................................................. 6
2.4 Microphone of HME 46-3 (with preamplifier) ................................................ 6
2.5 General data .......................................................................................................... 6
3 Disassembly ....................................................................................................7
3.1 Removal of the cable ........................................................................................... 7
3.2 Disassembly of the cap........................................................................................ 7
3.3 Disassembly of the cable .................................................................................... 7
3.4 Disassembly of the microphone arm ................................................................ 8
4 Assembly .........................................................................................................9
4.1 Assembly of the cap............................................................................................. 9
4.2 Assembly of the -PTT-x cable............................................................................. 9
4.3 Assembly of the cable to the headset............................................................ 10
4.4 Assembly of the microphone arm ................................................................... 10
5 Testing and fault isolation ......................................................................... 11
5.1 Tools and test equipment ................................................................................. 11
5.2 Operational test of the audio system............................................................. 11
5.2.1 Audio testing the headset with cable ............................................................ 11
5.2.2 Operational testing of the pre-polarized microphone
at the headset with cable (HME 46-3-x only) .............................................. 11
5.2.3 Testing of the dynamic microphone
at the headset with cable (HMD 46-3-x only).............................................. 12
5.2.4 Operational testing of the headset cables .................................................... 12
5.2.5 Audio testing of the headset without cable ................................................. 12
5.2.6 Testing of the ActiveGard™ of the PCB (not HMD/E 46-31)...................... 13
6 Wiring diagrams .......................................................................................... 15
6.1 Wiring diagram for cable -E-3PTT-M, -D-3PTT-M......................................... 15
6.2 Wiring diagram for cable -PTT-L...................................................................... 16
6.3 Wiring diagram for cable -PTT-6 ..................................................................... 17
6.4 Wiring diagram for cable -PTT-LA................................................................... 18
6.5 Printed circuit boards ........................................................................................ 19
6.6 Block diagram...................................................................................................... 20
7 Exploded views with spare part lists ........................................................ 21
7.1 Exploded view HME 46-3 / HMD 46-3 ............................................................ 21
7.2 Spare part list for HME 46................................................................................. 22
7.3 Spare part list for HMD 46 ................................................................................ 22
7.4 Exploded view of the system module ............................................................ 23
7.5 Spare part list of the system module
not microphone side (525764) ....................................................................... 23
7.6 Spare part list of the system module
microphone side (525763)............................................................................... 23
7.7 Exploded view of the cap, microphone side .................................................. 24
7.8 Spare part list of the cap, microphone side................................................... 24
7.9 Exploded view cable -PTT-x .............................................................................. 25
7.10 Spare part list for cable -PTT-x ........................................................................ 25