190-01007-C1
GTN Xi Part 23 AML STC Maintenance Manual
Rev. 1
Page 7-4
7.1.1 GTN Xi Configuration Steps
7.1.1.1 COM Configuration Page (GTN 635Xi/650Xi/750Xi Only)
Select the
COM Configuration
page from the
GTN Setup
page. These values are set at the factory and
rarely require calibration.
To enable or disable the COM radio, touch the
COM
key to toggle between
Enabled
and
Disabled
. The
COM radio defaults to the enabled state.
Review the COM configuration settings on the GTN Xi and compare them against the GTN Xi
Configuration Log. A copy of the GTN Xi Configuration Log form may be found in Appendix A of this
document. If any of the settings differ from the log, update the settings to the correct value. For
information regarding individual settings, refer to
GTN Xi Part 23 AML STC Installation Manual
.
7.1.1.2 Enabled Features
Refer to Section 7.4 for instructions on feature enablement. If the configuration module is not replaced, the
enabled features will be retained on the replacement GTN Xi.
7.1.2 GTN Xi Ground Checks
Ground checks of the GTN Xi require the GTN Xi to be powered on in Configuration mode, as described
in Section 3.2.2.
7.1.2.1 Connector Engagement Check
Prior to configuration and checkout of the GTN Xi, the connector engagement should be checked as
described below:
1. Ensure that the GTN Xi GPS/NAV and COM circuit breakers are open.
2. Slide the GTN Xi straight into the rack until it stops about 1 inch short of the fully seated position.
3. Insert a 3/32" hex drive into the unit retention mechanism access hole at the bottom of the unit face
and turn the tool clockwise while pressing the bezel until the unit is firmly seated in the rack.
4. With the GTN Xi seated, reapply power by closing the circuit breakers and turning on the avionics
master switch (if installed).
5. Insert the hex drive into the unit retention mechanism access hole. Turn the tool counterclockwise
to back out the retention mechanism. Ensure that three complete revolutions of the Allen screw
can be performed without a red “X” indication or loss of power to the GTN Xi.
NOTE
If power is lost, or the red “X” condition occurs with fewer than three turns, ensure there
are no obstructions to the unit fully seating in the rack. The mounting rack may need to be
moved aft (i.e., toward the pilot) such that the aircraft panel does not obstruct the unit
from properly engaging in the rack.
6. Open the circuit breakers to remove power from the unit and re-seat the GTN Xi per step 3. Close
the breakers to restore power to the unit.
