Tait TB7100, Руководство по обслуживанию

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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 50 W/40 W version has a black DC power connector
C
and the 25 W
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 50 W/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