User Guide

Garmin G1000 Pilot’s Guide for the Columbia 350/400
190-00552-00 Rev. A4-4
AUDIO PANEL AND CNS
4.2 AUDIO PANEL OPERATION
POWER-UP AND FAIL-SAFE OPERATION
POWER-UP
The Audio Panel performs a self-test during power-up. During the self-test all Audio Panel annunciator
lights illuminate for approximately two seconds. Once the self-test is completed, most settings are restored
to the ones in use before the unit was last turned off.
FAIL-SAFE OPERATION
A fail-safe circuit connects the pilot’s headset and microphone directly to COM1 in case power is interrupted
or the unit is turned off. In this case, audio is not available on the speaker.
KEY ANNUNCIATORS
Pressing any key on the Audio Panel activates and deactivates the function. Triangular annunciators above
each key illuminate to show when the function is on or off (Figure 4-2). Annunciators do not illuminate on a
disabled function.
KEY BACKLIGHTING
Key annunciators and backlighting can be manually adjusted from the PFD or automatically controlled by a
photocell.