Garmin GTN 6 series Maintenance Manual - page 43
190-01007-B1
GTN 6XX/7XX Part 27 AML STC Maintenance Manual
Rev. 1
Page 4-11
4.3.1.4
Remote Transponder Related Alerts
Table 4-6. Remote Transponder Alert Troubleshooting Guide
Alert Text
Possible Cause
Corrective Action
TRANSPONDER 1 -
Transponder 1 needs service.
The transponder is reporting a system failure.
Refer to the transponder installation manual.
TRANSPONDER 2 -
Transponder 2 needs service.
The transponder is reporting a system failure.
Refer to the transponder installation manual.
TRANSPONDER 1 -
Transponder 1 is inoperative
or connection to GTN is lost.
The GTN cannot communicate with the
transponder or the transponder is reporting a
system failure.
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.
TRANSPONDER 2 -
Transponder 2 is inoperative
or connection to GTN is lost.
The GTN cannot communicate with the
transponder or the transponder is reporting a
system failure.
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.
TRANSPONDER -
Transponder 1 and 2 Mode S
addresses do not match.
The transponders are configured for different
Mode S addresses.
Check the Mode S address for each transponder and verify that they match.