TM8100/TM8200 Service Manual TMAA02-06 Support Kit for Concealed and Dynamic Microphones 511
© Tait Electronics Limited November 2007
21 TMAA02-06 Support Kit for Concealed
and Dynamic Microphones
The concealed and dynamic microphone support board plugs onto
the radio’s control head board and contains circuitry for a pre-
amplifier and a microphone switch circuit. The concealed electret
microphone is installed inside the speaker grille of the
control head.
If the radio is placed in emergency mode, the concealed
microphone can be used to monitor activity around the radio. The
support board is required if a dynamic microphone is used, such as
the microphone in the TMAA10-02 handset.
The TMAA02-06 support kit is used for radios with 1-, 2- or 3-
digit display control heads. For radios with a graphical display
control head, the TMAA02-07 kit is used (refer to “TMAA02-07
Concealed Microphone” on page 519).
21.1 Installation
Important This equipment contains devices which are susceptible to
damage from static discharges. Refer to “ESD Precautions”
on page 112 for more information.
Disassembling the
Radio Control Head
To install the concealed-microphone capsule and concealed and dynamic
microphone support board, the control head must be removed from the
radio and disassembled. For detailed disassembly instructions, refer to
“Disassembly and Reassembly” on page 135.
Installing the
Microphone
Capsule and
Dynamic
Microphone Board
1. Disassemble the control head in order to gain access to the speaker
grille. This will mean removing the control head PCB, the space
frame, and the speaker.
2. Drill a 1mm diameter hole in the
concealed-microphone cavity
b
in
the position indicated by the small
‘dimple’
c
.
P2
P3
concealed microphone (capsule,
rubber seal and wires)
concealed and
dynamic microphone
support board
bc
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