Garmin GTN 750 Pilot's Guide - Page 366

Foreword 16.9 Backlight Settings The backlighting of the display and bezel keys can be adjusted automatically Getting Started or manually. The default setting (automatic backlighting adjustment) uses photocell technology to automatically adjust for ambient lighting conditions. Audio & Xpdr Ctrl Photocell calibration curves are pre-configured to optimize display appearance through a broad range of cockpit lighting conditions. A manual offset creates Com/Nav a deviation form the normal curve. Manual adjustments may be made from +100% to -10%. The negative adjustment is limited to prevent the backlight FPL from being accidently decreasing the backlight to the point where the display of Direct-To information could not be seen. Manual backlighting adjustment can be accomplished using the existing Proc instrument panel dimmer bus or the following procedures. Charts 1. While viewing the System page, touch the Backlight key. Wpt Info 2. Touch the Arrow keys to adjust the Backlight level. Map Traffic Terrain Weather Touch The Arrow Keys For Manual Offset Nearest Music Utilities System Messages Figure 16-33 Backlight Level Selection 3. After making the desired selections, touch the Back key to return to the System page. Symbols Appendix Index 16-28 Garmin GTN 725/750 Pilot's Guide 190-01007-03 Rev. B