Figure 3-17 Gtn 6Xx And 7Xx Diagnostics Pages; Gtn Diagnostics Page - Garmin GTN 6 Series Maintenance Manual

3.3.5

GTN Diagnostics Page

The GTN Diagnostics page, is accessed from the Configuration Mode home page and is a useful tool for
diagnosing issues and troubleshooting problems. Ground checks are also performed using the tools on this
page.

Figure 3-17 GTN 6XX and 7XX Diagnostics Pages

ARINC Inputs
The ARINC Inputs page displays the ARINC 429 data being received over each ARINC 429 port. Each
port can be chosen for display by touching the Port key and toggling between the input ports. Select a port
to display. The GTN will then display the label, SSM, Data, and SDI for each ARINC 429 input port. This
is useful for determining if the expected labels are being received and also for troubleshooting incorrect or
swapped wiring to the input ports. The data log is paused by toggling the Pause key. Clear the data log by
touching Clear Log key.
Serial Inputs
The Serial Inputs page displays the serial data that is being received and is useful for determining if the
GTN is receiving data on each connected port. Select the desired port by touching the Port key and
selecting the RS-232 channel from the list. The data log can be paused by toggling the Pause key. Clear the
data log by touching Clear Log.
Discrete Inputs
The Discrete Inputs page displays the state of each of the discrete input pins on the GTN. This page is
useful for troubleshooting discrete wiring issues.
Discrete Outputs
The Discrete Outputs page displays the state of each of the discrete outputs and allows them to be toggled
between active and inactive. This is useful for ensuring that annunciator and signal outputs are properly
connected to annunciator lights or other LRUs and that they are receiving the signal.
190-01007-B1 GTN 6XX/7XX Part 27 AML STC Maintenance Manual
Rev. 4 Page 3-17