System Maintenance Manual

G1000 / GFC 700 System Maintenance Manual - 300/B300 Series King Air Page 5-45
190-00716-01 Revision 1
Symptom Recommended Action
A button/knob/joystick does not
appear to function
• Go to the GDU TEST page in configuration mode and verify button,
knob, or joystick operates correctly by observing a change in color from
red to green in the button/knob/joystick icon when the
button/knob/joystick is pressed. If a button is stuck, the button icon will
be green without pressing the button as soon as you turn to the GDU
TEST page.
9 If problem is verified, replace GDU.
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