Page 5-44
G1000 / GFC 700 System Maintenance Manual - 300/B300 Series King Air
Revision 1
190-00716-01
5.8 GDU
104X
Troubleshooting
5.8.1
GDU 104X Common Problems
Symptom Recommended
Action
Display is blank
•
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.
9
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.
9
Adjust avionics dimmer control full clockwise.
9
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.
9
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 PFD1 and PFD2.
9
If problem follows unit, replace the display. Please note the
position it failed in (PFD1/2).
9
If problem does not follow unit, troubleshoot aircraft wiring for fault
.
Display resets
Display flickers
SD card is stuck in GDU
•
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.
9
Remove all but one label.
•
Ensure the SD card is from Toshiba or 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 Garmin for repair.
Summary of Contents for Cessna Caravan G1000
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