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Troubleshooting; Resetting The Unit - Sony NAV-U NV-U52 Quick Start Manual

Personal navigation system


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• Halogenated flame retardants are not used in the
certain printed wiring boards.
• Use of rechargeable lithium ion batteries.
• Corrugated cardboard is used for the packaging
• VOC (Volatile Organic Compound)-free vegetable
oil based ink is used for printing the carton.


The following checklist will help you remedy
problems you may encounter with your unit.
Before going through the checklist below, check the
connection and operating procedures.
The unit does not turn on.
t Charge the built-in battery.
t Check that the car battery adapter is securely
inserted into the cigarette lighter socket.
The built-in battery cannot be charged.
t Press ?/1 to turn on the unit, then press it again to
turn off the unit.
t If the car battery adapter is being used, disconnect
it from the cigarette lighter socket, 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.
t Turn on the computer during USB charge.
GPS signal cannot be received.
Firstly, read the GPS overview (page 4), then check the
GPS status by selecting "More..." in the top menu c
"GPS Status."
• The system cannot receive GPS signals due to an
t Move your car to a place where signals can be
received clearly.
• 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.
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 (page 8).
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 suction cup comes off the attachment
Attachment strength weakens if the surface of the
suction cup or attachment surface becomes dirty.
t Clean the surface of the suction cup and the
attachment surface with a soft, wet lint-free cloth
(page 12).
The demonstration mode starts automatically
even if no operation is performed.
t Turn off the auto demonstration mode by selecting
"More..." in the top menu c "Settings" c "General
Settings" c "Demo Mode." Then, confirm that
"Demo Mode" is set to off.

Resetting the unit

If the navigation software freezes, try resetting
the unit.
Press the RESET button, then press ?/1 to turn
on the unit.
After you reset the unit, it may take time to receive
GPS signals when turning on the unit.


Table of Contents

Table of Contents