Page D-48
G900X/G950 Installation and Maintenance Manual – Troubleshooting
Revision D
190-00719-00
D.6.6 NAV Related Alerts
Message Cause
Solutions
NAV1 SERVICE – NAV1
needs service. Return unit for
repair.
The system has detected
a failure in NAV1 receiver.
•
Replace
GIA1.
NAV2 SERVICE – NAV2
needs service. Return unit for
repair.
The system has detected
a failure in NAV2 receiver.
•
Replace
GIA2.
D.6.7 G/S Related Alerts
Message Cause
Solutions
G/S1 SERVICE – G/S1 needs
service. Return unit for repair.
The system has detected
a failure in G/S1 receiver.
•
Replace
GIA1.
G/S2 SERVICE – G/S2 needs
service. Return unit for repair.
The system has detected
a failure in G/S1 receiver.
•
Replace
GIA2.
G/S1 FAIL – G/S1 is
inoperative.
The system has detected
a failure in G/S1 receiver.
•
Switch GIA1 and GIA2 to verify
location of problem:
−
If problem follows the unit,
replace GIA.
−
If problem does not follow unit,
check G/S1 antenna and
cabling.
G/S2 FAIL – G/S2 is
inoperative.
The system has detected
a failure in G/S2 receiver.
•
Switch GIA1 and GIA2 to verify
location of problem:
−
If problem follows the unit,
replace GIA.
−
If problem does not follow unit,
check G/S2 antenna and
cabling.