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  1. #41
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    20min and its still 4-5 satellite. Should i leave it there till 1 hour?
    So what minimum satellite is recomended?

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  3. #42
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    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.
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  4. #43
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    Move somewhere else where on the Satellite page the GPS "sees" more satellites. If the GPS sees only 4-5 most probably the place you are on does not have very good vision of satellites or worst the GPS have a problem. But better change you place and if you wish perform a hard reset before that.

  5. #44
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    Ok will try it, mine have surrounded by trees

    anyway, is those car adapter with speaker is really waterproof ?
    i have read manual, and its only say remote control not waterproof

  6. #45
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    Sorry, I don't know. But I know from local offroaders that they put silicone on the cradle of zumo 550 not to get water inside and the cradle to burn.

  7. #46
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    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
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    it seems no regulator circuit near speaker enclosure
    Now its time to cut it, still looking for good connector from battety to GPS though
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    Last edited by mbajing_deh; 21st December 2013 at 18:09. Reason: Update

  8. #47
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    Quote Originally Posted by mbajing_deh View Post
    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.
    Love your wife? Buy yourself a GPS for answering to her favorite question: "Dear, where are you?".

  9. #48
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    Quote Originally Posted by Giomen View Post
    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)
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    after a little finishing with heatshrink
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    Last edited by mbajing_deh; 22nd December 2013 at 15:47.

  10. #49
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    Quote Originally Posted by Neil View Post
    Yes. 750MB was available over and above the already loaded NA mapping. So, as the OEM detail map is more in size than the ID map you intend to load then you should have even more free space after you replace it. US/CA V7 was OEM and would have been far more than 200MB, probably closer to 700MB back then, so I'm guessing maybe the flash drive is 1.5GB in the 2720.
    Hallo Neil
    How to see avaiable space ? i have searching on SP2720 menus and did not find it


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

    Add information
    I had an test on this 2720, this device actually only drawn less than 0.2A (fluctuated) at 13.8VDC with 3 satellite locked (i'm inside home) so my guess that 1A is really peak value.
    And this device still running fine to voltage 7,5VDC.
    below than that value its start to striped screen

  11. #50
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    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:

    6zmz

    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.
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