Gdu 105X Troubleshooting - Garmin G1000 NXi Supplemental Maintenance Manual

Data Path Failures
Failure Message
FAILED PATH – A data path has
failed.
5.5

GDU 105X Troubleshooting

GDU 105X Symptoms
Symptom
Display is blank
Display resets
Display flickers
SD card is stuck in GDU
G1000 NXi Supplemental Maintenance Manual
Textron Aviation G36/G58
Cause
A communications data path
status is not being received by the
G1000.
Recommended Action
•
Ensure that a cell phone or a device using cell phone technology is not turned
on (even in a monitoring state) in the cabin.
•
Cycle power.
✓
If GDU recovers, observe display for yellow text containing error
information at the top of the screen. If message indicates software need
to be re-loaded, then re-load software. Otherwise, replace the GDU.
•
Use a bright light to verify LCD is active.
✓
Adjust avionics dimmer control full clockwise.
✓
Manually turn up backlight on the PFD and load configuration files to the
GDU.
•
Ensure slide lock is fully engaged with the locking tabs on the back of the unit.
✓
If slide lock is not fully engaged, remove connector and verify the locking
tabs on the GDU are perpendicular to the connector. If necessary,
straighten them before reseating connector.
•
Ensure GDU is receiving power. If a circuit breaker is tripped, determine
source of short before resetting breaker.
•
Ensure circuit breakers have not failed and power wire connections are secure.
•
Swap PFD and MFD
✓
If problem follows unit, replace the display. Please note the position it
failed in (PFD or MFD).
✓
If problem does not follow unit, troubleshoot aircraft wiring for fault.
•
DO NOT insert a screwdriver of any length into the card slot.
•
DO NOT pry against the overlay.
•
DO NOT force the SD Card out.
•
Use a small screwdriver in the groove on the side of the exposed end of the
card to help pull out the card.
•
Push the card in further to release the card locking mechanism.
•
Check SD Card for having more than one label. Two or more labels on the
card will cause sticking.
✓
Remove all but one label.
•
Ensure the SD card is from SanDisk. Use of other SD Cards is not
recommended.
•
If card was inserted with the label facing to the right, do not attempt to remove.
Return the unit to an authorized repair facility.
Page 5-9
Solutions
Determine which data path has failed:
See Section 5.1.1.
Check wiring continuity for the failed
path.
Swap or replace the affected LRU.
190-02765-05
Revision 2