Gma 35 Configuration And Testing; Figure 6-1. Audio Panel Configuration Page - Garmin GTN 6 series Maintenance Manual

6.3.3

GMA 35 Configuration and Testing

The following steps must be performed when replacing a GMA 35 audio panel.
1. Load GMA 35 software per Section 3.2.2.
2. Configure audio panel per Section 6.3.3.1.
3. Perform ground check per Section 6.3.3.2.
6.3.3.1 GMA 35 Audio Panel Configuration (GTN 7XX Only)
6.3.3.1.1 GMA 35 Audio Panel Settings
In configuration mode, touch the External Systems key (See
Figure 3-8) followed by the Audio Panel key. The Audio
Panel page (Figure 6-1) will be displayed. Touch the
Configure key to access configuration settings for audio
routing, volume, and miscellaneous options. See Figure 6-1.
Touch Back to return to the Audio Panel page.
Touch the Connected Radios key to set the status (Present or
Not Present) of COM 2, COM 3, NAV 1, NAV 2, RCVR 3,
RCVR 4, RCVR 5, TEL, Music 1, Music 2 and Marker
Beacon. Touch Back to return to the Audio Panel page.
Review the GMA 35 audio panel configuration settings on the
GTN and compare them against the GTN Configuration Log.
A blank copy of the GTN Configuration Log form may be
found in the appendices of this document. If any of the settings
differ from the configuration log, update the settings to the
correct value. For information regarding individual settings,
refer to the GTN 6XX/7XX AML STC Installation Manual
(P/N 190-01007-B3).
6.3.3.2 GMA 35 Audio Panel Checkout (GTN 7XX Only)
6.3.3.2.1 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 that 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 the
GTN 725/750 GMA 35 Pilot's Guide, P/N 190-01007-03.
NOTE
In the following procedural steps allow for variation in the configuration settings for the
particular installation under test.
190-01007-B1
Rev. 1
GTN 6XX/7XX Part 27 AML STC Maintenance Manual
Figure 6-1. Audio Panel
Configuration Page
Page 6-5