Garmin GTN 6 series Maintenance Manual - page 35
190-01007-B1
GTN 6XX/7XX Part 27 AML STC Maintenance Manual
Rev. 1
Page 4-3
RS-232 device is not
communicating with the GTN.
GTN RS-232 port not
configured correctly.
Check RS-232 port setting for port that device is connected to.
Improper setup on the remote
device.
Verify the configuration of the other device.
Device not compatible, or
improper connection.
Verify GTN RX is connected to remote device TX and GTN TX is connected to remote device
RX.
Multiple TX lines connected
together.
Verify that there is only one TX source per RX port.
Wiring connections are
incorrect.
Check wiring.
Baud rate and parity settings
not set correctly.
Ensure the correct baud rate and parity settings are selected in Config Mode.
GTN boots into Configuration
mode rather than Normal
mode.
Software Loader Card is
inserted into SD card slot.
Remove Software Loader Card and insert database card. Ensure GTN powers up in normal
mode after this.
Reload software into the GTN (See Section 3.2). Ensure the GTN powers up in normal mode
after this.
Table 4-1. GTN Troubleshooting Guide
Problem
Possible Cause
Corrective Action