System Maintenance Manual

Page 5-48 G1000/GFC700 System Maintenance Manual – C90A/C90GT/C90GTi King Air
Revision F 190-00682-01
Symptom Recommended Action
Terrain/Obstacle/Safetaxi does
not display
• Ensure supplemental data cards are inserted correctly in the lower slots
of all three GDU’s.
• Allow the system to verify the data on the cards for approximately five
minutes after power-up.
• If a database does not activate, reload the problem database onto the
SD Card or replace the card.
Display will not track dimmer bus
• Reload GDU configuration files.
• If display is a PFD, swap PFD1 and PFD2 to see if problem remains
with display.
9 Replace display if condition remains with the same unit.
9 If condition remains in original position after swapping displays,
check GDU dimmer input to verify voltage is present.
• If display is the MFD, check dimmer input to verify voltage is present.
9 Replace MFD if dimmer voltage is present.
Keyboard will not track dimmer
bus