Connector Engagement Check; Configuration Mode Operations - Garmin GTN 625 Installation Manual

6.3 Connector Engagement Check

Prior to configuration and checkout of the GTN, the connector engagement should be checked as described
below:
1. Turn on the avionics master switch (if installed).
2. Place the GTN in the rack and engage the cam mechanism.
3. Turn the Allen screw of the locking cam (located on the lower left side of the unit) slowly clock-
wise until the GTN just powers on. A T-handle can be used for this, but ensure that the screw is not
over-tightened.
4. Count the number of complete revolutions the Allen screw can be turned until it cannot turn any
more. Take care not to over-tighten. Three (3) turns is the minimum for proper installation. If
fewer than three (3) turns are possible, the mounting rack should be moved aft (toward the pilot)
such that the aircraft panel does not obstruct the unit from properly engaging in the rack.

6.4 Configuration Mode Operations

Configuration Mode is used to configure the GTN settings for each specific installation. To access
configuration mode with the GTN turned off, press and hold the 'Home' key and apply power to the GTN.
Release the 'Home' key when the display activates and the Garmin logo appears fully lit on the screen. The
first page displayed is the Configuration Mode page, as shown in Figure 6-1. While in configuration mode,
pages can be selected by touching the desired key on the display.
NOTE
The configuration pages shown in this section reflect main software version 4.00. Some
differences in operation may be observed when comparing the information in this manual
to later or earlier software versions.
GTN 625/635/650 TSO Installation Manual
Page 6-2
Figure 6-1. Configuration Mode Page
190-01004-02
Rev. F