Display Backlighting - Garmin Cirrus Perspective SR20 Pilot's Manual

SYSTEM OVERVIEW

1.7 DISPLAY BACKLIGHTING

The dimming bus is the primary source for backlighting adjustments of the PFD and MFD displays, bezel, Audio
Panel keys, AFCS Control Unit keys, and PFD/MFD Control Unit keys. The automatic backlighting adjustment
for the AFCS Control Unit annunciators and PFD/MFD Control Unit annunciators uses photocell technology to
automatically adjust for ambient lighting conditions. Photocell calibration curves are pre-configured to optimize
display appearance through a broad range of cockpit lighting conditions. Manual backlighting adjustment can
be accomplished using the existing instrument panel dimming bus or the following procedures. In normal
operating mode, backlighting can only be adjusted from the PFD. In Reversionary Mode, it can be adjusted from
the remaining display.
Adjusting display backlighting:
1) Press the PFD MENU Key to display the PFD Setup Menu. 'AUTO' is now highlighted next to 'PFD DSPL'.
2) Turn the small FMS Knob to select 'MANUAL'.
3) Press the ENT Key. The intensity value is now highlighted.
4) Use the FMS Knob to enter the desired backlighting then press the ENT Key.
5) Turn the large FMS Knob to highlight 'AUTO' next to 'MFD DSPL' and repeat steps 2-4.
6) To remove the menu, press the CLR or MENU Key.
Adjusting key backlighting:
1) Press the PFD MENU Key to display the PFD Setup Menu. 'AUTO' is now highlighted next to 'PFD DSPL'.
2) Turn the large FMS Knob to highlight 'PFD DSPL'.
3) Turn the small FMS Knob in the direction of the green arrowhead to display 'PFD KEY'.
4) Turn the large FMS Knob to highlight 'AUTO'.
5) Turn the small FMS Knob to select 'MANUAL'.
6) Press the ENT Key. The intensity value is now highlighted.
7) Use the FMS Knob to enter the desired backlighting and press the ENT Key.
8) Turn the large FMS Knob to highlight 'MFD DSPL'.
9) Turn the small FMS Knob in the direction of the green arrowhead to display 'MFD KEY' and repeat steps 4-7.
10) To remove the menu, press the CLR or MENU Key.
Cirrus Perspective
54
PFD
Figure 1-44 PFD Setup Menu
by Garmin – Pilot's Guide for the SR20/SR22/SR22T
™
190-00820-08 Rev. A