Figure 5-9 Lighting Page; Lighting - Garmin GI 275 Installation Manual

5.5.2

Lighting

This section outlines the preferred method for configuring the GI 275 lighting in the aircraft. The GI 275
STC allows display/knob lighting control with or without the Enhanced Lighting mode selection. The
Enhanced Lighting mode allows a more customized lighting curve.
Configure Day Mode Curve is the only setting available for configuration when Enhanced Lighting mode
is selected. Figure 5-9 shows the Lighting page.
NOTE
All lighting conditions must be considered when configuring the display for photocell only. If the
aircraft is equipped with an instrument panel flood or wash lighting, the installation must be
evaluated to verify the flood/wash lighting does not affect the GI 275 lighting level. If the display
lighting level is adversely affected by the flood/wash lighting, then the GI 275 must be connected
to a lighting bus to control the display brightness.
To accurately configure the lighting, the ability to adjust ambient light conditions is required. The installer
must have the means to simulate complete darkness in the cockpit. Simply covering the photocells may not
allow the installer's eye to properly judge whether the display brightness is too bright or too dim for night
use.
The following tables must be used for lighting configuration:
• Table 5-46 - Photocell for display/knob (Advanced Lighting mode de-selected)
• Table 5-47 - Lighting bus for display/knob (Advanced Lighting mode de-selected)
• Table 5-48 - Photocell for display/knob (Advanced Lighting mode selected)
• Table 5-49 - Lighting Bus for display (Advanced Lighting mode selected)
• Table 5-50 - Lighting Bus for knob (Advanced Lighting mode selected)
190-02246-10
Rev. 11

Figure 5-9 Lighting Page

GI 275 Part 23 AML STC Installation Manual
Page 5-38