Sony Nav-u NV-U81T Guia De Inicio Rapido página 28

The built-in battery cannot be
charged.
t Check that the POWER switch on the
bottom left of the unit is in the ON
position.
t If the AC power adapter is being used,
disconnect it from the outlet, then
reconnect.
t The built-in lithium-ion battery can be
charged at temperatures between 5 – 45
ºC (41 – 113 ºF). The battery may not be
charged if the temperature inside the unit
increases because of direct sunlight
exposure, etc. This is not a malfunction.
GPS signal cannot be received.
• Read the GPS overview (page 6).
• The system cannot receive GPS signals
due to an obstruction.
t Move your car to a place where signals
can be received clearly.
• GPS signal reception is low.
t Check the GPS status by selecting
"More..." in the top menu c "GPS
Status."
• There is an obstacle in front of the GPS
aerial.
t Install the unit where the signal is not
interrupted by the body of the car, etc.
• GPS signal reception may be prevented by
a heated or heat reflective windscreen.
t Use the optional External GPS
Antenna VCA-41.
28
The car position on the map does not
match the current road.
The error margin of the signal from the GPS
satellites is too large. A maximum error
margin of a few hundred metres can exist.
Voice guidance cannot be heard.
The volume is set too low.
t Raise the volume by touching
top menu or the map display.
When the unit is powered by the built-in
battery, volume may slightly decrease.
The LCD is not displayed normally.
• In high temperatures, the LCD may darken
and not display clearly. In low
temperatures, afterimage may occur on the
LCD. These are not malfunctions, and the
LCD will return to normal when the
temperature returns to within the specified
operating range.
• The LCD is dark.
t The auto dimmer function may be
activated because its sensor (page 8) is
covered by a hand, etc.
The cradle comes off from the
attachment surface.
Attachment strength weakens if the surface
of the suction cup or attachment surface
become dirty.
t Wash and clean the suction cup and the
attachment surface (page 23).
in the