Garmin GPS 90 - Manual (Page 79)

Antenna connections and internal failures may also result in long acquisition
times, no position fix or intermittent reception:
• Check the GPS 90’s portable antenna connection by rotating the black
knob clockwise until it stops (see page 65 for instructions).
• Position the antenna so it’s perpendicular to the ground
If you’re using the suction cup antenna mount:
• Check the antenna connections at both ends
• Make sure the antenna has a clear view of the sky and as perpendicular to
the ground as your windscreen allows.
Is there any way to completely reset my unit?
The GPS 90 is designed to provide years of reliable service without any rou-
tine maintenance or adjustments. If the unit has been stored without batteries, or
you have encountered a problem that was not solved by the troubleshooting tips,
you may find it necessary to perform a master reset on your unit. A master reset
will clear any corrupt data (e.g., incorrect UTC time, etc.) and place the unit in
AutoLocate mode for re-initialization.
NOTE: Performing a master reset will also clear all user data, including user
waypoints, routes and track logs.
To perform a master reset:
1. Press the B and M keys simultaneously for 2 seconds.
Once the unit has been reset, allow the unit 15-30 minutes to acquire new
satellite data and calculate a position (see page 63).
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Appendix D
Troubleshooting
gps 90 manual 8/6/98 10:01 AM Page 71