MyDean VR3 - GPS Usage Cautions; 5. Support Guide; Troubleshooting Checklist

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In C/A code, horizontal error combined with all errors is 28m when SA does not activate
and 100m when SA activates.
SA code means enlargement of error range so that United States may limit use by non-
allowed GPS satellite users during military operation.
Basically, GPS is not much affected by weather. It cannot be said that there is no effect
at all, but there is no absolute effect. Depending on situation, as sunspot activity of sun
becomes active, if magnetic field change around earth becomes severe, GPS reception
cannot be well performed.
 Cautions during Use of GPS
① Do not dissemble, repair, or remodel it randomly.
② Pay attention not to pour water or liquid.
③ Avoid use in environments with shock, high temperature, high humidity, etc.
④ Use it by avoiding the following conditions.
 Tree foliage.
 Next to tall buildings, beneath bridge, beneath elevated road.
 Inside buildings, tunnels, aircraft, ships etc.
 Beneath other objects blinding GPS antenna parts, etc.
 When covered by the palm of a hand.
 Do not put gold, metallic objects, or electric wave emitting objects around
GPS. Do not leave GPS for long time where there is severely high or low
temperature.
5 Support Guide
 Self Check List before contacting technical support
The following checklist will be helpful in solving problems encountered while using your
navigation system. Before reviewing the following checklist, check the equipment connection
and operation procedure.
Screen is blank.
 Verify if power is applied to the device.
Navigation does
not start.
 Verify that SD card containing the navigation program is inserted.
GPS does not
operate well.
 Verify that there is no equipment blocking to the GPS antenna.
 Verify that the vehicle has clear line of sight to the sky (it is not
in an underground parking lot or inside tunnel).
If system still does not operate normality please contact a dealer or customer services.