Table 4-6. Remote Transponder Alert Troubleshooting Guide - Garmin GTN 6 series Maintenance Manual

4.3.1.4 Remote Transponder Related Alerts
Alert Text
TRANSPONDER 1 -
Transponder 1 needs service.
TRANSPONDER 2 -
Transponder 2 needs service.
TRANSPONDER 1 -
Transponder 1 is inoperative
or connection to GTN is lost.
TRANSPONDER 2 -
Transponder 2 is inoperative
or connection to GTN is lost.
TRANSPONDER -
Transponder 1 and 2 Mode S
addresses do not match.
190-01007-B1
Rev. 1

Table 4-6. Remote Transponder Alert Troubleshooting Guide

Possible Cause
The transponder is reporting a system failure.
The transponder is reporting a system failure.
The GTN cannot communicate with the
transponder or the transponder is reporting a
system failure.
The GTN cannot communicate with the
transponder or the transponder is reporting a
system failure.
The transponders are configured for different
Mode S addresses.
Corrective Action
Refer to the transponder installation manual.
Refer to the transponder installation manual.
If two transponders are present, ensure that both GTNs are powered on.
Check for proper configuration of the GTN and transponder RS-232 ports.
Check for correct wiring.
Refer to the transponder installation manual.
Ensure that both GTNs are powered on.
Check for proper configuration of the GTN and transponder RS-232 ports.
Check for correct wiring.
Refer to the transponder installation manual.
Check the Mode S address for each transponder and verify that they match.
GTN 6XX/7XX Part 27 AML STC Maintenance Manual
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