Garmin GTN 6 series Maintenance Manual - page 77
190-01007-B1
GTN 6XX/7XX Part 27 AML STC Maintenance Manual
Rev. 1
Page 6-13
6.3.8
Fan Interface Check
The fan that is mounted to the GTN backplate should be checked after replacing the fan. With the GTN
unit running in normal mode and the fan powered on and running, go to the Home page and touch the
Message Queue key. Ensure that the “COOLING FAN- the cooling fan has failed” message is not
displayed. Note that the fan may take a few minutes to power on if the unit is below normal operating
temperature.
6.3.9
Radar Altimeter Interface Check
Complete the following procedure to check the GTN interface with a radar altimeter.
1. Apply power to the radar altimeter.
2. Power up the GTN in Configuration mode by applying power while holding the HOME key.
3. On the GTN Diagnostics page, verify that the GTN is receiving data from the radar altimeter.
6.4 Enabled Features
See Section 3.3.4 for guidance on enabling features.
6.4.1
HTAWS Configuration and Checks (For Units with HTAWS Only)
Reconfigure HTAWS settings per the Configuration Checkout Log. The Terrain configuration settings are
located under the GTN Options menu.
Figure 6-5. Audio Configuration Page
Figure 6-6. Terrain Configuration Page