Motorola GM380 Service-informatie - Pagina 6

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1. Gm140/Gm340/Gm640 Models
2. Gm160/Gm360/Gm660 Models
3. Power Supplies
4. Controlhead Model for Gm140, Gm340 and Gm640
5. Allocation of Schematics and Circuit Boards

1-2

overview

3.0

GM380/GM1280 Models (GCN6121_)

The Controlhead contains the on/off/volume knob, 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 21 pre - deﬁned symbols and a 32*96 dot matrix for

graphical or alpha - numerical information e.g. channel number, select code, call address name. To

control the LED's and the LCD, and to communicate with the host radio the control head uses the

Motorola 68HC11K4 microprocessor.