190-01115-01 G3X/G3X Touch Install Manual - GDU 4XX Config and Post Install Checkout
Rev. AC Page 34-178
34.7 External Interface Configuration (Garmin units only)
Refer to Section 26.2 and Section 27.2 for wiring the interface connections between GDU 4XX 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 26.2
and Section 27.2
for specific unit configuration settings. This section lists specific instructions for changing the
configuration settings of the external Garmin units (the SL30 and SL40 units do not require configuration).
34.7.1 GNS 400/500 Series Units (including ‘A’, ‘TAWS’, & ‘WAAS’ models)
Entering Configuration Mode:
1. With power applied to the aviation rack and the 400/500 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 ensuring the cursor is off and rotating the
small right knob, select the desired Config Page.
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 turn on 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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