Gsr 56 Troubleshooting; Gts 820/850 Troubleshooting - Garmin G1000 System Maintenance Manual

5.26

GSR 56 Troubleshooting

Symptom
No communication with GSR 56
No or low-quality Iridium signal
No audio output
Unable to make a phone call
5.27

GTS 820/850 Troubleshooting

Problem
Unit does not power up – Data
failed message
Traffic Display erroneously
indicates TA at own ship position
No Audio alerts
Calibration Fault
Configuration Fault
FPGA Fault
ROM Fault
Execution Fault
Electrical Fault
Whisper Shout Fault
Transmit Power Fault
G1000 / GFC 700 System Maintenance Manual - 300/B300 Series King Air
190-00716-01
Recommended Action
• Check power wiring and pin out of GSR 56 unit.
• Ensure GSR 56 configuration option has been loaded.
• Ensure the Iridium antenna has an unobstructed view of satellite
constellation.
• Check the Iridium antenna cable and connectors.
• Verify antenna ground plane is adequate.
• Check wiring from GSR 56 toGDL 59.
• Verify subscription with Garmin Flight Data Services (reference Section
7.27).
• Verify signal quality is adequate
• Verify communication between GSR 56 and the display/control device
• Verify subscription with Garmin Flight Data Services (reference Section
7.27).
Cause
Improper wiring; circuit breaker open
Improper configuration
Suppression bus I/O fault
Improper wiring; Volume not set correctly
Factory calibration invalid
Both internal and external configuration
checks failed
Internal Fault
Internal Fault
Internal Fault
Internal Fault
Internal Fault
Internal voltages are out of tolerance
Solution
Ensure power is properly wired to the
GTS 8XX and the TRFC circuit
breaker is closed
Verify that the GTS 8XX is configured
correctly for the desired display
Check the mutual suppression line to
ensure it is connected to the correct
pins at the GTS 8XX as well as the
installed transponder. Ensure there
are no fractures in the wire, and that
the suppression line is functioning
properly.
Ensure the audio is properly wired
from the GTS 8XX and volume is not
set too low
If the unit fails to go into operate
mode then return to Garmin for
service
Verify the configuration
Verify wiring to the configuration
module and replace if necessary
Return to Garmin for service
Return to Garmin for service
Return to Garmin for service
Return to Garmin for service
Return to Garmin for service
Check power connections to the GPA
65 to verify that they are not
connected to ground or each other.
Ensure that power and ground
connections to the GPA 65 are
connected in their proper place.
Page 5-87
Revision 1