Garmin GTN6XX User Manual

190-01007-A1

System Maintenance Manual GTN 6XX/7XX Part 23 AML STC

Rev. 7

Page 6-5

1. Locate and pull the audio panel circuit breaker.

2. Ensure that the GTN(s) are not receiving power prior to removal of the audio panel.
3. Remove the GTN 7XX.
4. Locate the GMA 35 unit retention mechanism access hole at the bottom center of the unit face.
5. Insert a 3/32" hex tool into the access hole and turn the fastener counterclockwise until the unit is

forced out about 3/8" and can be freely pulled from the rack

6. Slide the GMA 35 unit out of the rack.

1. Ensure that the audio panel circuit breaker is pulled and the GTN units are 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. Reinstall the GTN 7XX.
5. Verify that there are no failure messages or annunciations when the GTN and audio panel is

powered on.