User's Manual
14
NV-U83T/U73T
3-284-845-11 (1)
F:\Data Disc\3284845111\328484511NVU83TU\01US02NAV-U.fm masterpage:Left
Built-in battery charging time/usage 
time
Charging time
With the supplied car battery adapter/optional AC 
adapter: Approx. 2 hours (with unit turned on), or 
1 hour (in standby mode)
With the supplied USB cable:
Approx. 2 hours (in standby mode)
Usage time
Up to 2 hours (depending on usage)
Optional accessories
AC Adapter: XA-AC13
Car Battery Adapter: XA-DC3
External GPS Antenna: VCA-42
Design and specifications are subject to change 
without notice.
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.
•  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 printing the carton.
General
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 Turn on the unit, then 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.
Note that the CHG indicator may light up in green 
in the computer standby mode, even though the 
built-in battery is not fully charged.
GPS signal cannot be received.
Firstly, read the GPS overview (page 6), then check the 
GPS status by touching   in the main menu c 
“General” c “GPS Status.”
• The system cannot receive GPS signals due to an 
obstruction.
t Move your car to a place where signals can be 
received clearly.
• 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.
• GPS signal reception may be poor depending on the 
material of the car’s windshield.
t Use the optional External GPS Antenna VCA-42. 
(NV-U73T 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 meters can exist.
Voice guidance cannot be heard.
The volume is set too low.
t Raise the volume.
00US+00COV-U.book Page 14 Monday, October 29, 2007 5:34 PM










