G1000 Nav III Line Maintenance Manual
Page 2-41
190-00352-00
Rev.
L
Symptom Recommended
Action
No COM Audio
•
Verify the COM radios are not tuned to the same frequency and each
volume adjusted to the same level. Reference Garmin Service
Advisory 0535.
Mic Audio Heard in Speaker
•
Reduce ICS Volume
2.3.3
GMA Alerts
Message Cause
Solutions
MANIFEST – GMA1 software
mismatch. Communication
Halted.
The system has detected an
incorrect software version
loaded in GMA 1347.
•
Load correct software version.
GMA1 SERVICE – GMA1 needs
service. Return unit for repair.
The G1000 has determined
GMA1 needs service.
•
Replace GMA1
GMA1 FAIL – GMA 1 is
inoperative.
The G1000 has detected a
failure in GMA1.
•
Ensure GMA1 is receiving power
•
Ensure both GIAs are receiving power
•
Ensure all GDUs are receiving power
•
Ensure the GMA/GIA RS-232 data lines
are working properly
•
Ensure the GIA/GDU Ethernet data
lines are working properly
o
Replace GMA
GMA1 CONFIG – GMA1
configuration error. Config
service req’d.
The G1000 has detected a
GMA configuration
mismatch.
•
Load GMA configuration file, see
Section 4.2.2.
o
Replace GMA.
o
If problem persists, replace master
configuration module, check config
module wiring for faults and replace
if necessary.
NOTE
New Terrain/Obstacle cards, Jeppesen
Aviation Database and other optional
features (i.e. TAWS unlock card) will need
to be replaced if the master configuration
module is changed. The G1000 System ID
number will change to a new number when
installing a new master config module. The
old Terrain and other cards will no longer
work as they will remain locked to the old
System ID number.
Summary of Contents for G1000 NAV III
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