Introduction/Theory Of Operation - Motorola GM1200E Service Manual

Exploded View Diagram
2.0 Exploded View Diagram
Housing back
1586001B01
Gasket
3286006B01
PCB
8486015B05
not field replaceable
Keypad
7586002B03
Frame, LCD
0786004B01
LCD module
7286003B02
Gasket, LCD
3286005B01
3.0 Theory of Operation
3.1 General
The control head contains the microphone connector, several buttons to operate the radio, several
indicator Light Emitting Diodes (LED) to inform the user about the radio status and a Liquid Crystal
Display (LCD) with 19 pre - defined symbols, 11 bars and a 24x120 dot matrix for graphical or alpha
- numerical information e.g. channel number, select code, call address name. To control the LEDs
and the LCD, and to communicate with the host radio, the control head uses the Motorola
68HC11E9 or 68HC11E20 (dependent on the used character set) microprocessor.
2.1-2
Control Head Kit GCN6110A
Housing, front
Control head
1586000B01
LAPD0008-2

Introduction/Theory of Operation