Garmin 255A manual Set Display Brightness

3.5.2Display Brightness

As it arrives from the factory, the GNC 255 automatically adjusts its display brightness for the current lighting conditions. A small sensor on the display is used for this function. A manual adjustment is available for controlling the brightness level of the display as an offset from the “normal” or zero position.

The limits of the adjustment range are: -10 (Low Display Intensity) and 100 (High Display Intensity). A value above zero means brighter than normal and a value below zero means darker than normal. The range can be adjusted by using the SMALL knob to adjust the value.

The GNC 255 will either control dimming based on the photocell or the lighting bus. This is set in configuration mode during installation and is not selectable by the pilot.

1. Press FUNC to access the Functions. Turn the LARGE knob to select the SYS Function. Turn the SMALL knob to view the Display Brightness function. Then, press the ENT key.

				Current Display
				Brightness
Press ENT to	Accept	Press CLR to Return	Turn the SMALL Knob to
the Selected Value		to the Previous Value	Select the Offset Value

Figure 3-34 Set Display Brightness

2.Turn the SMALL knob to set the value. Then, press the ENT key.

190-01182-01 Rev. A Garmin GNC 255A/255B Pilot’s Guide 3-19