System maintenance and user support
Loading the factory default settings
If you still encounter system errors even after soft resetting the device, load the factory default settings to correct the error. These default settings have been selected to optimize your device’s performance.
To load the factory default settings:
1.Tap 
on the Main Menu panel.
2.Tap 
on the System panel.
3.Tap Factory Reset on the System Info screen.
4.Tap Yes on the dialog box.
5. After the factory reset, reconfigure your device’s user preferences.
Resetting the GPS function
In the following circumstances, the TTFF (Time To Fix First) values of your NAV 350 may be longer than usual.
•After a long period of inactivity
•If the current GPS fix position is more than 500 km, or more than apart 12 hours apart, from the previous position
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