Gma 35 Interface Check (Gtn 7Xx Only) - Garmin GTN 6 Series Maintenance Manual

6.4.2

GMA 35 Interface Check (GTN 7XX Only)

1. With the GTN running and the GMA 35 Audio Panel powered on, go to the home page and touch
the Audio Panel key.
2. Ensure a red "X" is not displayed over the Audio Panel key.
After configuring the audio panel, an in-rotorcraft checkout may be performed with a good microphone,
headset, speaker, and avionics receivers. For testing the marker beacon, use a ramp tester that transmits a
75 MHz marker beacon test signal.
For instructions on how to operate the GMA 35 in Normal mode during checkout procedures, refer to
GTN 725/750 GMA 35 Pilot's Guide (P/N 190-01007-03).
6.4.2.1 GMA 35c Bluetooth Audio Check
NOTE
In the following procedural steps, allow for variation in the configuration settings for the
particular installation under test.
While on the ground, turn on the GTN and GMA 35c. A compatible Bluetooth-capable device is required.
NOTE
To verify telephone audio, a Bluetooth-compatible phone is required.
1. Go to the GMA 35c page by touching System → Connext Setup → GMA 35c.
2. Ensure Bluetooth is enabled.
3. On the PED, view the list of available Bluetooth devices.
4. Select the device that matches the Bluetooth name shown on the GTN screen.
5. Verify that the PED is paired with the GTN. A green checkmark is displayed by the paired device.
6. Touch Intercom on the GTN 725/750.
7. Touch Bluetooth Audio and set distribution to Pilot, Co-pilot, and Passenger.
8. Touch Radio to mute Bluetooth during radio transmissions.
9. Touch Intercom to mute Bluetooth during intercom transmissions.
10. Verify that the audio from the PED is distributed to the selected positions.
11. Tune and monitor a COM frequency to ensure communications over the radio are easily heard
over the audio.
NOTE
If different values are used for the telephone and audio volume settings, repeat this
procedure while making a call from a Bluetooth compatible phone.
12. Adjust the Bluetooth volume as necessary.
190-01007-B1
Rev. 4
GTN 6XX/7XX Part 27 AML STC Maintenance Manual
Page 6-12