Garmin G900X Installation And Maintenance Manual page 556

D.6 GIA 63W Related Alerts and Problems
D.6.1 COM
Symptom
Weak COM transmit power
Weak COM receiver or
COM squelch opens
intermittently
No COM sidetone
COM Bleedover
Page D-44
Revision D
Recommended Action
•
Switch GIA1 and GIA2, to verify location of problem:
•
If problem follows unit, replace GIA.
•
If problem does not follow unit, check COM antenna and
cabling for faults.
•
Switch GIA1 and GIA2, to verify location of problem:
•
If problem follows unit, perform GIA COM Procedure per
Section C.2.4.
−
Replace GIA if COM adjustment does not achieve desired
results.
•
If problem does not follow unit, check COM antenna and
cabling for faults.
•
Switch GIA1 and GIA2, to verify location of problem:
•
If problem follows unit, replace GIA.
•
If problem persists, replace 347.
•
Verify on the GMA CONFIGURATION page that "MUTE AUDIO
ON TX" has a green box. Due to the closeness of the COM
antennas and high power of the COM transceivers, normal Split
COM operation is not approved. If the box is black, highlight
"MUTE AUDIO ON TX" with the cursor and press the ENT key to
turn the box green.
G900X/G950 Installation and Maintenance Manual – Troubleshooting
190-00719-00