16-9190-01004-03 Rev. B
Garmin GTN 625/635/650 Pilot’s Guide
Foreword
Getting
Started
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Wpt Info
Map
Traffic
Terrain
Weather
Nearest
Music
Utilities
System
Messages
Symbols
Appendix
Index
Message Description Action
GPS RECEIVER -
Low internal clock
battery.
The GPS module
indicates that its clock
battery is low. The unit
will function normally,
but may take a longer
than normal period to
acquire a GPS position.
Contact dealer for service.
GPS RECEIVER -
GPS receiver needs
service.
The GPS module is
reporting that it needs
service. The GPS module
may continue to
function.
Use a different GPS receiver
or a non-GPS based source of
navigation. Contact dealer for
service.
GPS SEARCHING
SKY -
Ensure GPS
antenna has an
unobstructed view
of the sky.
The GPS module is
acquiring position and
may take longer than
normal. This message
normally occurs after
initial installation or if
the unit has not been
powered for several
weeks.
No action is necessary; message is
informational only.
GTN -
GTN needs service.
The GTN has lost
calibration data that
was set by Garmin
during manufacturing.
Contact dealer for service.
INTERNAL SD
CARD ERROR -
GTN needs service.
Internal SD card has an
error. This card is not
accessible by the user.
Contact dealer for service.
INTERNAL SD
CARD REMOVED -
GTN needs service.
Internal SD card was
removed. This card is
not accessible by the
user.
Contact dealer for service.
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