Garmin G1000 Maintenance Manual page 90

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5.1.6.4 COM Advisory Messages
Advisory Message
COM1 SERVICE – COM1 needs
service. Return unit for repair.
COM2 SERVICE – COM2 needs
service. Return unit for repair.
COM1 PTT – COM1 push-to-talk
key is stuck.
COM2 PTT – COM2 push-to-talk
key is stuck.
COM1 TEMP – COM1 over
temp. Reducing transmitter
power.
COM2 TEMP – COM2 over
temp. Reducing transmitter
power.
Page 5-44
Rev. A
Possible Cause
The GIA63W has
determined COM1 needs
service.
The GIA63W has
determined COM2 needs
service.
The COM1 external push-to-
talk (PTT) switch is stuck in
the enabled (or "pressed")
state.
The COM2 external push-to-
talk (PTT) switch is stuck in
the enabled (or "pressed")
state.
The G1000 has detected an
over temperature in COM1.
The G1000 has detected an
over temperature in COM2.
Recommended Actions
Replace GIA1.
Replace GIA2.
•
Press the push-to-talk switch(s)
again to cycle its operation.
•
Check push-to-talk switch(s)
and wiring.
•
Check GIA1/GMA 1347 #1
interconnect.
•
Switch GIA1 and GIA2, to verify
location of problem:
−
If problem follows the unit,
replace GIA1.
−
If problem persists replace
GMA 1347 #1.
•
Press the push-to-talk switch(s)
again to cycle its operation.
•
Check push-to-talk switch(s)
and wiring.
•
Check GIA2/1347 #2
interconnect.
•
Switch GIA1 and GIA2, to verify
location of problem:
−
If problem follows the unit,
replace GIA2.
−
If problem persists replace
GMA 1347 #2.
a. Check fan, wiring and air tubing
for proper operation (if
applicable).
b. Replace cooling fan if unable to
determine if operating correctly.
c. Replace GIA1.
d. If problem persists contact
Garmin Aviation Product
Support for assistance.
a. Check fan, wiring and air tubing
for proper operation (if
applicable).
b. Replace cooling fan if unable to
determine if operating correctly.
c. Replace GIA2.
d. If problem persists contact
Garmin Aviation Product
Support for assistance.
G1000 System Maintenance Manual
190-00903-00