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install the nav desk software to you p.c and connect the navman to the pc via the usb cable.
You will be prompted that a map upgrade is available through the NavDesk software. Once the unit has synchronized with the NavDesk software you will be informed that a later map is available. Once you select the map data, it will begin to download to your computer.
Unfortunately the website of the manufacturer is useless because is NOT ACCESSIBLE [http://www.nav-cam.com]. Usually on the website most of the GPS devices manufacturers' are offering updates [firmware & maps]. Thinking of this "special" case of Nav-Cam all you can do is to connect the company: # by telephone - 866-268-8515 # by e-mail - USAsupport@nav-cam.com
1. Download the SONYNAVU_U73T_3.2.CN.BIN file to a temporary or download
directory. 2. Connect your nav-u personal navigation device to the
computer using the supplied USB cable. 3. Power on your nav-u
personal navigation device and wait until the "Connect to PC" message is
displayed on the nav-u screen. 4. Start the nav-u Tool software on
the computer. 5. At the "nav-u tool" window, click "Upgrade System". 6.
On the right side of the Upgrade Screen, verify that the target version
is 3.00. 7. On the left side of the Upgrade Screen, click the
"Browse" button, and go to the directory where the
SONYNAVU_U73T_3.2.CN.BIN file was downloaded and then click "OK". 8.
In the "Name" box, click to select "3.02 cn NV-U73T" update, and then
click the button. 9. After the update file is transferred to the
nav-u device a "Transferring Upgrade file completed." message is
displayed on the computer. 10. After the system software update is
complete, the nav-u device will automatically shut down and restart.
Sorry, here is the bad new,
Sony Canada told me that my NAV-U70 does NOT have sufficient memory to drive the next Navteq update (which will be offered by Sony) and guess what, that update is not even available yet, may be in a couple months or weeks, Sony don't even know when!!!
After spending over 500 CDN$ (tax incl) for my NAV-U70 2 years ago at Best Buy store, Sony Canada do not care at all either Best Buy, they offered me 100$ which I can use on other Sony products, well... will I buy something else from Sony... not sure! :-(