Interface Board; Video Board; Keyboard - Garmin GNS 400W Series Maintenance Manual
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Also See for GNS 400W Series:
- Pilot's manual & reference (220 pages) ,
- Pilot's manual addendum (19 pages)
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3.7
INTERFACE BOARD
The Interface Board produces voltage level shifting for the video signal that provides power to
the display. It also provides the interface to the data cards.
3.8
VIDEO BOARD
The Video Board provides two spare RS-232 serial ports through external connector J50. These
serial ports conform to EIA standard RS-232C. The Video Board connects to the Main Board by
the flex cable.
3.9
KEYBOARD
The Keyboard consists of snap-dome keys, photocell, and LEDs for backlighting display
operation.
GNS 400W Series Maintenance Manual
190-00356-05
Page 3-5
Rev. A
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Troubleshooting
