190-01115-01 G3X/G3X Touch Installation Manual - GDU 37X Config and Post Install CheckoutRev. AA Page 31-14031.7 External Interface Configuration (Garmin units only)Refer toSection 24.2 and Section 25.2 for wiring the interface connections between GDU 37X LRUs andany external Garmin units such as the GNS 4XX/5XX, GNS 480, GTN 6XX/7XX, and GTX transponderproducts. See the Configuration Guidance instructions on the drawings in Section 24.2 and Section 25.2for specific unit configuration settings. This section lists specific instructions for changing theconfiguration settings of the external Garmin units (the SL30 and SL40 units do not require configuration).31.7.1 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 theENT key and turn the unit on.2. Release the ENT key when the display activates. The unit is now in configuration mode. After thedatabase 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 thesmall right knob, select the desired Config Page.NOTEMake configuration changes only as described in this section, changing otherconfiguration settings is not recommended and may significantly alter the unit’s operation.Garmin recommends recording all configuration settings (before making any changes) forreference.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.
