Tait TM8100 mobiles, Service Manual

Page: 28 / 620

28 Description TM8100/TM8200 Service Manual
© Tait Electronics Limited November 2007
Speaker
The speaker
1!
sits inside a round recess of the front panel assembly, where
a cloth membrane is fixed to the speaker grille. The speaker clamp
1)
holds
the speaker in position. The speaker cable plugs into the speaker connector
on the rear side of the control-head board
F
.
Note
In some configurations the speaker may be disconnected.
Concealed
Microphone
(Optional)
A concealed microphone
1%
consisting of the microphone capsule and a
rubber seal can be fitted in a round recess inside the front panel assembly
1^
.
The microphone leads are soldered to two pads on the top side of the
control-head board. Before the microphone is fitted, a small hole is drilled
in the recess to provide an acoustic path to the microphone. The hole is
covered by the rubber seal to ensure that the control head remains sealed to
IP54 standards. For more information refer to
“TMAA02-07 Concealed
Microphone” on page 519 .
Space Frame
The aluminium space frame
J
snaps into the three clips of the front panel
assembly
1^
. The front side of the space frame holds the keypads, the LCD
assembly, and the speaker in place and at the same time allows access to their
electrical contacts. The rear side of the space frame has four through-holes
for the screws
E
of the control-head board
F
and two screw bosses to fit
the adapter flange
C
. Two light pipes
H
and
I
are fitted in recesses in the
space frame and direct light from LEDs on the control-head board to the
front panel. A slot at the top edge of the space frame allows the loom of the
LCD assembly
1@
to run to the control-head board.
Seals
Two identical ring seals
G
fitted to grooves around the perimeter of the
space frame provide for IP54 class protection.