Garmin G1000 Line Maintenance Manual page 117

Uncontrolled if Printed
______________________________________________________________________________
Table 4-4. GMA 1360D System Messages (Continued)
System Message
GMA 1 CONFIG
GMA1 INSPECTION
REQUIRED
GMA1 FAIL
DIG GMA MANIFEST
GMA1 MANIFEST
GMA1 SERVICE
4.7.2.2 Noise Present in the Audio
Most often the cause of the noise is external to the GMA. Try the following to locate the
source of the noise before replacing the GMA:
1. Try a different headset. Noise canceling headsets might pick up or generate more
noise from their own circuitry than standard headsets.
2. Check for noise with the aircraft engine turned off.
3. If the noise is present only when the aircraft engine is running, check the
generator and ignition system as possible sources of noise. Refer to the OEM
approved Aircraft Maintenance Manual.
____________________________________________________________________________
LMM for the Kodiak 100
190-02102-00 Rev.4
Cause
The audio panel
configuration settings do
not match backup
configuration memory.
GMA1 backup power
source is not connected.
The audio panel self-test
has detected a failure.
The audio panel is
unavailable.
GMA1 software
mismatch.
Communication halted.
GMA1 software
mismatch.
A fault has been
detected in GMA1.
Recommended Actions
• Reload configuration to the
GMA.
• If the problem persists,
replace the GMA.
• If the problem persists,
check the configuration
module wiring for faults and
replace if necessary.
• If the problem persists,
replace the configuration
module.
• Cycle power to the unit.
• Check aircraft supply
voltage and proper ground.
• If problem persists, remove
and replace the GMA.
• Cycle power to the unit.
• If problem persists, remove
and replace the GMA.
• Load the correct software.
• Load the correct software.
• Replace the GMA.
Page 4-33