Tait TM8235, Руководство по обслуживанию

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32 Description TM8100/TM8200 Service Manual
© Tait Electronics Limited June 2006
2.1.4 RJ45 Control Head
The RJ45 control head consists of the following parts:
■
front panel
■
control-head loom with female-female adaptor
■
control-head board
■
PCB bracket.
The circled numbers in this section refer to the items in Figure 2.7 on
page 33 .
Front Panel
The front panel
F
is an injection-moulded plastic part with two apertures
for the fitted programming connector and a second optional RJ45
connector. When not in use, the apertures are sealed with two RJ45 bungs
F
to ensure that the control head is sealed to IP54 standards. There is also a
hole for the
POWER ON
/
OFF
LED which illuminates through the label.
A label with the model number is attached to the front panel with self-
adhesive coating and can be replaced for rebranding purposes.
The rear side of the front panel has four screw bosses to fasten the PCB
bracket
E
.
Control-Head Loom
The control-head loom
C
with the female-female adapter connects the
connector on the control-head board
B
to the control-head connector of
the radio body. For more information refer to “Control-Head Connectors”
on page 42 .
Control-Head Board
The control-head board
B
is a printed circuit board in SMT design with
some hand-soldered parts.
All components are placed on the top side, including the programming
connector, the connector for the control-head loom
C
, and the
POWER ON
/
OFF
LED.
The control-head board slides into a slot in the front panel and slots in the
PCB bracket
E
, and is held in place by two clips of the PCB bracket
E
.
PCB Bracket
The PCB bracket
E
is an injection-moulded plastic part which is fitted to
the front panel
F
with four 3x8 PT screws
D
.