Thread: How to update maps on a street pilot 2720

4 is minimum to get a 3D fix with reasonably accurate elevation. 3 will get a 2D fix but the triangulation is potentially very inaccurate [large 'triangle of error' where you could be out by kilometers possibly].

You need to leave it for half an hour initially like i said.

Just try at another place with clear sky, got signal for all satellite
Thank you neil & ddabcd277

p.s
my homework now is find out which connector pinout for power supply
i will cut those cable and made a socket for it

Positive and Ground Connection
[Only registered and activated users can see links. ]

it seems no regulator circuit near speaker enclosure
Now its time to cut it, still looking for good connector from battety to GPS though
[Only registered and activated users can see links. ]

Originally Posted by mbajing_deh

anyway, is those car adapter with speaker is really waterproof ?

It is not really waterproof but you do not care about it. I forgot it in car before a ford forcing a many time. Just dried and cleaned from swamp slime and no problem. One moment what no voltage supply to it in this cases because all auto electrical circuits below roof certainly was disconnected.
P.S. Car adapter is not sealed and you can see yourself that is inside.

Originally Posted by Giomen

It is not really waterproof but you do not care about it. I forgot it in car before a ford forcing a many time. Just dried and cleaned from swamp slime and no problem. One moment what no voltage supply to it in this cases because all auto electrical circuits below roof certainly was disconnected.
P.S. Car adapter is not sealed and you can see yourself that is inside.

Thanks for your information, my little concern if inside those speaker enclosure have a electronic pcb or something like that
i will open it when i already have small screw driver

=========================================================================

Finally, i'm cutting DC adapter and grab some "hid ballast" socket because its waterproof
so i can interchange between AC power / Battery power
I had tested, red cable still Positive and Black is Ground
Dont forget to put a fuse, i take lazy ways (solder them directly)
[Only registered and activated users can see links. ]

after a little finishing with heatshrink
[Only registered and activated users can see links. ]

That's the sad news Mate. You can't see it using Windows tools, not as far as i know anyway. Not visible in My Computer/Windows Explorer/Disk Management. No drive letter allocated. These things are not at all like modern nuvis which are true mass storage devices [the recent ones can also be used in Media Transfer Protocol of course] and they also have a true 'preboot mode' for flashing. The 2720 has only one mode for transferring data [e.g. maps] and for flashing, no difference.

All I can tell you is to connect it with BaseCamp/MapInstall as if you intend to transfer a map image and check the free space that way:



The guys who used these things a lot in the 'old days' may have some other tricks though, but i really don't know much more about them than what you do now.