TM8100 Mobile Radio Service Manual General Description 33
May 2004 © Tait Electronics Limited
2 General Description
Scope of Section This section comprises a general description of the radio body and
control head of TM8100 radios. Firstly, the mechanical parts,
miscellaneous parts, and circuit boards that make up the radio are
identified and discussed. Secondly, the basic modules of the circuitry are
identified and their essential functions described. Thirdly, the operation
of the control-head circuitry is summarised. Finally, the principles of
operation of the radio are given in three separate subsections.
2.1 Illustrated Parts Breakdown
Introduction This subsection identifies all the mechanical parts, miscellaneous parts,
and circuit boards that make up the radio. The parts and circuit boards
are illustrated in three sets of figures covering respectively the control
heads with UI, the blank control head, and the radio body. The figures
are exploded-view illustrations showing how the parts and circuit boards
are assembled to build the complete radio. Accompanying the figures are
tables in which the parts identified in the figures are listed and their
details given.
Labels on Radio Before the different parts of the radio are considered, however, some
important external features are described. These are illustrated in
Figure 2.1, which shows the underside of the radio. The first feature is
the set of four labels with the following information:
■ compliance information
■ serial number and product code
■ safety label — hot surface
■ safety label — RF exposure
The two safety labels concern the high temperatures that the body of the
radio can attain in operation and exposure to RF radiation during
transmissions. Regarding the former, the figure clearly shows the
cooling fins at the rear and the ridges on the underside, which are
provided for heat dissipation.
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