Garmin GTN 6 series Maintenance Manual - page 34
GTN 6XX/7XX Part 27 AML STC Maintenance Manual
190-01007-B1
Page 4-2
Rev. 1
OBS Resolver won’t calibrate.
Incompatible resolver or
improper connection.
Check the resolver specifications and wiring.
OBS indication on GTN does
not agree with OBS setting.
GTN resolver input not
calibrated correctly.
Check wiring and calibration.
Resolver has not been
calibrated.
GTN HTAWS Audio not
heard.
HTAWS audio volume level
set too low.
Increase HTAWS audio volume level.
Check wiring.
Check audio panel volume
and audio wiring.
Main software version has
just been updated.
1.
Allow up to 5 minutes for the TAWS audio clips to load.
2.
Cycle power on the GTN and verify that the HTAWS audio is working properly.
GTN is not receiving heading
from compass system
(ARINC 429 heading input
used).
ARINC 429 input port speed
not correct.
Check ARINC 429 input port speed setting for port that device is connected to and verify that
the speed is correct for that device.
Wiring connections are
incorrect.
The raw data being received by the GTN can be monitored on the ARINC Inputs page found on
the GTN Diagnostics page. See Section 3.3.5
Check wiring.
ARINC 429 device is not
receiving data from the GTN.
GTN ARINC 429 output not
configured correctly.
Check ARINC 429 output port setting for port that device is connected to.
Receiving LRU ARINC 429
input port speed not correct.
Check ARINC 429 input port speed setting for port that device is connected to and verify that
the speed is correct for that device.
Wiring connections are
incorrect.
Check wiring.
Table 4-1. GTN Troubleshooting Guide
Problem
Possible Cause
Corrective Action