Flight Displays Too Dim - Cirrus SR22 Pilot Operating Handbook

S 3A: A
ECTION BNORMAL
I A
NTEGRATED VIONICS

Flight Displays Too Dim

1. INSTRUMENT dimmer knob ...............................................................OFF
(FULL COUNTER-CLOCKWISE)
◆
If flight displays do not provide sufficient brightness:
a. Revert to standby instruments.
The instrument dimmer knob provides manual dimming control
of the display screens, key and text backlighting, flap and Environ-
mental Control System (ECS) status indicators, and standby
instruments. Rotation of the dimmer knob fully counterclockwise
disables the dimmer, and reverts to daytime lighting for all
components. In the event of a dimmer control circuit failure, or to
override the manual dimming circuit, pull the CABIN LIGHTS
In daytime lighting (knob OFF/full counterclockwise, or with
• Electro-mechanical standby instruments, all avionics system
keypads and the bolster switch panel are unlit
• MFD, PFD, and MD302 Standby Attitude Module (optional)
screen illumination is controlled by automatic photocell
(providing full brightness in high light conditions, only slightly
reduced by darkness)
• ECS and control panels are backlit and their status lights are at
maximum intensity
With active dimming (knob moved clockwise), the full bright
position (full clockwise) applies maximum illumination to keys
and switches, to standby instruments and to status lights, but the
PFD, MFD, and MD302 Standby Attitude Module (optional)
screen illumination is at a substantially reduced level (levels still
appropriate for night flight). Maximum screen illumination
(appropriate for daytime use) is with the dimmer OFF/full coun-
3A-16
P
ROCEDURES
S
YSTEM
Procedure Complete
• N
circuit breaker.
CABIN LIGHTS circuit breaker pulled):
terclockwise.
•
OTE
C D
IRRUS ESIGN
SR22
P/N 13772-006
Reissue A