TM8100/TM8200 Service Manual TMAA02-06 Support Kit for Concealed & Dynamic Microphones 493
© Tait Electronics Limited June 2006
21 TMAA02-06 Support Kit for Concealed &
Dynamic Microphones
The support kit for concealed and dynamic microphones can be
used in two main applications:
■ to monitor activity around the radio if the radio is placed in
emergency mode, and
■ to support the use of a dynamic microphone, such as that used in
the TMAA10-02 handset.
The concealed and dynamic microphone support board plugs onto
the radio’s control head PCB 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.
21.1 Installation
Important This equipment contains devices which are susceptible to
damage from static discharges. Refer to “ESD Precautions”
on page 108 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 129.
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 & wires)
concealed & dynamic
microphone support
board
bc
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