Garmin MX20 - MX20 Controls and Operation

Introduction
MX20 Installation Manual 560-1025-09 Rev E 3
Figure 1-2. Example of a MX20 I/O System Block Diagram
Figure 1-3. MX20 Front Panel Description
NOTE
Earlier versions of the MX20 have a rotary knob to control power and dimming functions.
Graphic Display
Power/Dimming
Line Select Keys
Menu/Enter Key
Data Card Ejector
Data Card
Display TitleMounting Screw
Smart Key Labels
Smart Keys
Function Key
Photosensor