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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.
General
The unit does not turn on.
tCharge the built-in battery.
tCheck that the car battery adapter is securely
inserted into the cigarette lighter socket.
The built-in battery cannot be charged.
tTurn on the unit, then turn off the unit.
tIf the car battery adapter is being used, disconnect
it from the cigarette lighter socket, then reconnect.
tThe 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.
tTurn on the computer during USB charge.
Note that the CHG indicator 7/
3 may light up in
green in the computer standby mode, even though
the built-in battery is not fully charged.
• 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
cushions.
• VOC (Volatile Organic Compound)-free vegetable
oil based ink is used for printin
g
the carton.
GPS signal cannot be received.
Firstly, read the GPS overview (page 6), then check the
GPS status by selecting “More…” in the top menu c
“GPS Status.”
• The system cannot receive GPS signals due to an
obstruction.
tMove your car to a place where signals can be
received clearly.
•There is an obstacle in front of the GPS aerial.
tInstall the unit where the signal is not interrupted
by the body of the car, etc.
• GPS signal reception may be poor depending on the
material of the car’s windscreen.
tUse the optional External GPS Antenna VCA-42.
(NV-U73T/U53 only)
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.
tRaise the volume (page 12).
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.
tThe auto dimmer function may be activated
because its sensor 5 (page 8)/
4 (page 8) is
covered by a hand, etc.
The cradle comes off the attachment surface.
Attachment strength weakens if the surface of the
suction cup or attachment surface becomes dirty.
tClean the surface of the suction cup and the
attachment surface with a soft, wet lint-free cloth
(page 17).
The demonstration mode starts automatically
even if no operation is performed.
tTurn 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.
continue to next page t