190-01115-01 G3X™/G3X Touch™ Avionics Installation Manual
Rev. AV Page H-148
H.7 External Interface Configuration (Garmin units only)
Refer to Section 24.2 and Appendix G.2 for wiring the interface connections between GDU 37X LRUs and
any external Garmin units such as the GNS 4XX/5XX, GNS 480, GTN 6XX/7XX, and GTX transponder
products. See the Configuration Guidance instructions on the drawings in Section 24.2
and Appendix G.2
for specific unit configuration settings. This section lists specific instructions for changing the
configuration settings of the external Garmin units.
H.7.1 GNS 4XX/5XX Series Units (including ‘A’, ‘TAWS’, & ‘WAAS’ models)
Entering Configuration Mode:
1. With power applied to the aviation rack and the 4XX/5XX Series unit turned off, press and hold the
ENT key and turn the unit on.
2. Release the ENT key when the display activates. The unit is now in configuration mode. After the
database pages, the first page displayed is the MAIN ARINC 429 CONFIG page.
3. While in configuration mode, pages can be selected by making sure the cursor is off and rotating
the small right knob, select the desired Config Page.
NOTE
Make configuration changes only as described in this section, changing other
configuration settings is not recommended and may significantly alter the unit’s operation.
Garmin recommends recording all configuration settings (before making any changes) for
reference.
Changing data on the displayed configuration pages:
1. Press the small right knob to display the cursor.
2. Turn the large right knob to change between data fields.
3. Turn the large or small right knob to change data in the selected field.
4. Press the ENT key to accept the entry.
5. Turn unit off and then back on to return to normal operation.
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