16 Mechanical Design TB7100 Service Manual
© Tait Electronics Limited October 2005
2.4 Transmitter Module
The transmitter module consisting of a transmitter board f mounted on a
purpose-designed heatsink
1) is mounted in the left rear of the tray with
four Torx T10 screws (not shown).
The transmitter board is a printed circuit board in SMT design with
components on the top and bottom sides. A digital board is reflow-soldered
to the board. Most components are shielded by metal cans. There are
different boards for each frequency band and each RF output power
configuration.
The RF
b, DC power c, auxiliary d, and user interface f connectors are
located on the bottom side of the board. The internal options connector
e
and a factory connector (not shown) for factory use are located on the top
side of the board.
The 50W/40W version has a black DC power connector
C and the 25W
version has a white DC power connector. For more information on the
connectors, refer to “Connections” on page 63.
The board
f is mounted to the heatsink 1) with seven Torx T10 screws
f and g.
An L-shaped gap pad
i and (with the 50W/40W version) a rectangular gap
pad
j are fitted between the board f and the heatsink 1) to improve heat
transfer.
Figure 2.4 Transmitter module
g
h
g
c
f
1)
D
b
e
j
i
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