190-01007-C1
GTN Xi Part 23 AML STC Maintenance Manual
Rev. 1
Page 6-6
6.2 GMA 35
Removal
1. Locate and open the audio panel circuit breaker.
2. Ensure that the GTN 7XX Xi(s) are not receiving power prior to removal of the audio panel.
3. Remove the GTN Xi unit.
4.
GMA 35c only:
Remove the Bluetooth antenna cable.
5. Locate the GMA 35 retention mechanism access hole at the bottom-center of the unit face.
6. Insert a 3/32" hex tool into the access hole and turn the fastener counterclockwise until the unit is
forced out about 3/8 inches and can be freely pulled from the rack.
7. Slide the GMA 35 unit out of the rack.
Re-installation
NOTE
Be sure not to overtighten the unit into the rack. The application of hex drive tool torque
exceeding 15 in-lbf can damage the locking mechanism.
1. Ensure that the audio panel circuit breaker is open and the GTN 7XX Xi is not receiving power.
2. Slide the GMA 35 straight into the rack until it stops.
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 on the face of the unit until the GMA 35 is firmly seated
in the rack.
4.
GMA 35c only:
Re-install the Bluetooth antenna cable. Torque 8 to 10 in-lbf using a 5/16 SMA
torque wrench.
5. Ensure the face of the GMA 35 is flush with the edge of the GMA 35 installation rack when
seated.
6. Re-install the GTN 7XX Xi.
7. Verify that there are no failure messages or annunciations when the GTN Xi and audio panel are
powered on.
