190-01115-01 G3X/G3X Touch Installation Manual - GDU 37X Config and Post Install Checkout
Rev. AC Page 33-147
33.7.2 GTX Transponder
Refer to the applicable transponder installation manual for configuration mode instructions. The
configuration settings are detailed in Section 26.2
and Section 27.2 of this document.
Make configuration changes only as described in Section 26.2 and Section 27.2, 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.
33.7.3 GTN 625/635/650/725/750 Unit
Configuration Mode Operations
Before configuring the GTN, ensure that no Configuration Module service messages are displayed in the
message queue. This would indicate that the config module is improperly wired or damaged.
Configuration mode is used to configure the GTN settings for each specific installation. While in
configuration mode, pages can be selected by pressing the desired key on the display. Some pages may
require page scrolling to view all of the information and keys on the page. Scrolling is done by pressing the
screen and dragging the page in the desired direction, or by pressing the Up or Down keys.
Entering Configuration Mode:
1. With the GTN turned off (circuit breaker pulled), press and hold the HOME key and reapply power
to the GTN (push in the circuit breaker).
2. Release the HOME key when the display activates and the name ‘Garmin’ appears fully lit on the
screen.
3. The first page displayed is the Configuration Mode Home Page (the following figures are for
reference only and may vary from actual screen/settings, refer to instructions on the drawings in
Section 26.2
and Section 27.2).
4. Press the GTN Setup key.
GTN 7XX Configuration Mode Home Page
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