The Keyboard display (ACD215) provides a capability to adjust the screen contrast settings.

This is intended to be used to adjust for personal preference or eliminate vertical "streaking" that can occur over time.

• Contrast adjust mode is accessed by simultaneously pressing the "A" and "D" buttons, then the "C" button.

Once in contrast adjust mode, use the FMS knob on the keyboard to adjust to desired contrast level.

Press "Enter" to leave this adjust mode and return to flight mode.