Tait TM8100 mobiles Service Manual page 27

2.1.2 Control Head with Graphical Display
Overview
Front Panel
Assembly
Knob for
Volume-Control
Potentiometer
Keypads
LCD Assembly
TM8100/TM8200 Service Manual
© Tait Electronics Limited November 2007
The control head can be divided into the following main areas:
front panel with control elements, indicators, LCD, speaker, and
■
concealed microphone (optional)
space frame and seals
■
control-head board with SMT components, shielding cans, connectors,
■
and volume potentiometer
control-head loom with female-female adapter
■
adapter flange.
■
The circled numbers in this section refer to the items in
page 29.
The front panel assembly
with an integrated transparent light pipe element for the radio
a transparent lens which cannot be replaced, a cloth membrane which is
fixed to the speaker grille, and a foam seal inside a rectangular LCD recess
behind the lens. A label
front panel assembly with self-adhesive coating and can be replaced for
rebranding purposes.
Three clips on the rear side of the front panel assembly snap onto the space
frame to hold the keypads
1!
in place. The rear side of the front panel assembly also has four screw
bosses to fasten the control-head board
The knob for the volume-control potentiometer
the volume-control potentiometer, which is soldered to the control-head
F
board .
1#
The main keypad (for the function, selection, and scroll keys) and the
1$
power keypad protrude through apertures in the front panel assembly
The rear sides of these keypads connect directly to the relevant contacts on
the control-head board
The graphical-display LCD assembly
rectangular recess of the front panel assembly
attached to the rear of the LCD with self-adhesive coating. The LCD
assembly has a loom, which runs through a slot in the space frame
connects to a connector on the rear side of the control-head board
1^
consists of an injection-moulded plastic part
1*
with the radio model number is attached to the
1# 1#
and , the LCD assembly
F
.
F
.
1@
sits on a foam seal inside a
1^
Figure 2.4 on
LEDs,
STATUS
1@
and the speaker
1&
is fitted to the shaft of
. Another foam seal is
J
F
.
Description
1^
.
and
27