Garmin GTN 6 series Maintenance Manual - page 73

190-01007-A1

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

Rev. 6

Page 6-5

6.2 GMA 35

Removal

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-inch hex tool into the access hole and rotate the fastener counterclockwise until the 

unit is forced out about 3/8 inch and can be freely pulled from the rack

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

Reinstallation

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-inch hex drive into the unit retention mechanism access hole at the bottom of the unit 

face and rotate 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.

CAUTION

Be sure not to over tighten the unit into the rack. The application of hex drive tool torque 

exceeding 15 in-lbs can damage the locking mechanism.