Sony NV-U70 - Manual (Page 21)

21
Troubleshooting
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.
Resetting the unit
If the navigation software freezes, try resetting
the unit.
Press the RESET button with a pointed object,
such as a ball-point pen.
If the problem persists, switch off the main
power by sliding the POWER switch to the OFF
position, then switch on again after
approximately 10 seconds.
Note
After you switch off the main power, it may take time to
receive GPS signals when switching on again.
The operation icons on the display do not
function.
An operation may take time while a map is displayed.
The unit does not turn on.
t Check that the POWER switch on the bottom right
of the unit is in the ON position.
t Charge the built-in battery (page 8).
t Check that the unit is securely attached to the
cradle (page 8).
The built-in battery cannot be charged.
t Check that the POWER switch on the bottom right
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.
• 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 information.
t The optional External GPS Antenna VCA-41
may be required for a heated or heat reflective
windshield.
• There is an obstacle in front of the GPS antenna.
t Install the unit where the signal is not interrupted
by the body of the car, etc. For details on the unit
installation, see “Mounting location” on page 5.
• Signal may not be received if a window film is
attached. In that case, use the optional External GPS
Antenna VCA-41.
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 meters can exist.
Voice guidance cannot be heard.
The volume is set too low.
t Raise the volume in the setting menu (page 17).
When the unit is powered by the built-in battery,
maximum available volume is 70 %, even if set
higher (80 %, etc).
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, or the map color has changed.
t The auto dimmer function may be activated
because its sensor (page 11) is covered by a hand,
etc.
POWER
ON OFF
CHG
RESET
POWER
OFF
ON
RESET button