Table 5-5. Vloc/Gs Alert Troubleshooting Guide - Garmin GTN 6XX System Maintenance Manual

5.3.1.3 VLOC/GS Related Alerts
Alert Text
VLOC RECEIVER -
Navigation receiver needs
service.
VLOC RECEIVER -
Navigation receiver has
failed.
GLIDESLOPE - Glideslope
receiver needs service.
GLIDESLOPE - Glideslope
receiver has failed.
REMOTE KEY STUCK -
NAV remote transfer key is
stuck.
System Maintenance Manual GTN 6XX/7XX Part 23 AML STC
Page 5-12

Table 5-5. VLOC/GS Alert Troubleshooting Guide

Possible Cause
The GTN 650/750 has detected a
failure in its navigation receiver.
The GTN 650/750 has detected
an internal failure in its VLOC
receiver.
The GTN 650/750 has detected
an internal failure in its glideslope
receiver.
The GTN has detected an
internal failure in its glideslope
receiver.
NAV remote transfer key is stuck
in the enabled or pressed state.
Corrective Action
Contact Garmin technical
support.
Contact Garmin technical
support.
Contact Garmin technical
support.
Contact Garmin technical
support.
Press the NAV remote transfer
switch to cycle its operation.
Go to the GTN DIAGNOSTICS -
DISCRETE INPUTS page in
configuration mode and check
that the state of the input
changes when the NAV remote
transfer switch is pressed and
released.
Verify that the NAV remote
transfer switch wiring is correct.
If the problem persists, contact
Garmin technical support.
190-01007-A1
Rev. 5