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Problem Possible Cause(s) Action
Display too
dark or too
light -
characters
hard to see
Change in
viewing angle or
ambient light
conditions in
cockpit
Adjust display
backlight (use
backlight key) or
adjust display contrast
as Section 5 describes
in “Screen Controls”
option
Search for
nearest
waypoints
reveals too
few or
wrong types
of waypoints
Incorrect
selection of
waypoint types
to show after
search
Check “Declutter
Maps” option as
Section 5 describes to
verify that desired
waypoint types to
search are “On”
Wrong
types of
waypoints
show on
moving
map screens
Incorrect
selection of
waypoint types
to show on
moving map
screens
See action above - the
waypoint types you set
to “No” do not show
on moving map
screens OR after
nearest waypoint
searches
Position fix
seems
inaccurate
Incorrect map
datum selected
Check “Operation
Mode” option as
Section 5 describes to
verify selection of
correct map datum
Displays
wrong
bearing and
track values
Incorrect
magnetic
variation value
entered manually
Check “Magnetic
Var” option as
Section 5 describes -
select “Automatic” or
verify correct value
for manual entry
Troubleshooting Apollo 360 GPS Receiver
D-2 P/N 560-0123-01