Tait TM8235, Service Manual

Page: 20 / 578

20 Description TM8100/TM8200 Service Manual
© Tait Electronics Limited June 2006
2.1.1 Radio Body
Overview
The radio body consists of the following main components (see Figure 2.2
on page 21 ):
■
cover
B
■
lid
D
■
internal options board (optional)
■
chassis
G
■
main-board assembly
F
.
Cover
The black plastic cover
B
wraps over the top and sides of the radio body.
Apertures in the sides of the cover allow access to the four external screw
bosses of the radio body used for mounting the radio to the U-bracket.
Lid
The aluminium lid
D
is attached to the chassis
G
with four M4x16 Torx-
head screws
C
. A seal fitted inside a groove at the underside of the lid
provides for IP54 class protection. The rear of the lid has an aperture for an
external options connector, which may be fitted if an internal options board
is used. If no external options connector is used, the aperture is sealed with
a bung for IP54 class protection. The lid contains two of the four screw
bosses to attach the radio to the U-bracket of the installation kit.
Internal Options
Board (Optional)
On the inside of the lid, nine screw points are provided for mounting an
internal options board, which can be sized and shaped as required.
The internal options board connects to the internal options connector of
the main board. Tait offers a range of internal options board, which are
described in the accessories section of this manual. For more information on
how to create your own internal options board, contact Tait Electronics
Limited.
Chassis
The aluminium chassis
g
is different for the 40W/50W radio and the 25W
radio.
The chassis
G
houses the main-board assembly
F
, which is attached with
five screws
E
to screw bosses inside the chassis and with two screws
I
through the rear of the chassis to the heat-transfer block.
The rear of the chassis has apertures for the RF, power and auxiliary
connectors of the main board. If the auxiliary connector is not used, the
aperture is sealed with a rubber bung
J
for IP54 class protection.
The RF connector has a rubber seal
H
which is fitted inside the aperture
for the RF connector.