Tait TP9100 - Page 23

TP9100 Service Manual Description 23
© Tait Electronics Limited May 2005
SMA and Knob Nuts
One nut 2% for the antenna SMA connector and two identical nuts 2$ for
the 16-way/3-way selector switch and the power/volume potentiometer
fasten these components to the chassis
3).
Speaker Pin Frames Two plastic speaker pin frames 1( are located around the speaker pins of the
main board
2# to protect the speaker pins against mechanical shock.
LCD Frame The plastic LCD frame 1& holds the LCD assembly 1* in place on the main-
shield assembly
2) and protects it against mechanical shock.
LCD Assembly The LCD assembly 1* sits between a foam seal inside a rectangular recess of
the front-panel assembly
B and the main-shield assembly 2).
The loom of the LCD assembly runs through a slot in the main-shield
assembly and connects to the LCD connector at the back of the main-shield
assembly.
A rubber foam frame is fitted to the back of the LCD assembly to protect
the LCD assembly against mechanical shock.
Main-Shield
Assembly
The main-shield assembly 2) consists of the metal main shield, the
conductive mylar, the front-panel interface board, and the polydome.
Note The individual parts of the main-shield assembly are not service-
able items. In case of damage, the entire main-shield assembly
must be replaced. For more information refer to “Spare Parts” on
page 289.
At the top of the main-shield assembly, two positioning pins are provided to
fit the main-shield assembly to the chassis
3).
At the rear of the main-shield assembly, the LCD connector connects to the
LCD assembly, and the front-panel loom connector connects to the front-
panel loom
2!.
When a key is pressed on the keypad, the polydome closes the
corresponding switch contact on the front-panel interface board and
provides tactile feedback to the user.
The front-panel interface board also has LEDs for keypad illumination and
an accelerometer for the man-down function.
Note The main-shield assembly is identical for the 16-key radio and the
4-key radio.