GPS issue-- CF31 Mk5

Discussion in 'Panasonic' started by cleatus, Sep 19, 2017.

  1. cleatus

    cleatus Notebook Enthusiast

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    watching the gps data stream its showing GPRMC..V...........N*53

    keeps repeating (amongst the rest of the data and 99,99,99;s...)
     
  2. cleatus

    cleatus Notebook Enthusiast

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    just reimaged one of the "bad" laptops--no fix. looking like hardware....
     
  3. SHEEPMAN!

    SHEEPMAN! Freelance

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    Could it be antennas, cables , dock or the pass-through? Dual pass-through hooked up to the wrong antenna? (wires crossed)

    Test the GPS with a USB antenna while not docked?

    Test with WWAN disabled and un-docked?

    I (meaning this is what I would do) would run a liveusb through it for diagnostics.
    Code:
    lsusb
    #######
    dmesg | grep input
    #######
    dmesg | grep  Qualcomm -i ##maybe Sierra or Gobi
    #######
    dmesg | grep pl2303 -i 
    Just to compare with a working one.

    Right now I suspect antenna and/or cables.
     
  4. cleatus

    cleatus Notebook Enthusiast

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    it is not docked- so no pass thru issue-
    pulled the cover off the antenna--no "obvious" issue, but no way to manually test it.
     
  5. SHEEPMAN!

    SHEEPMAN! Freelance

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    PL2303 serial usb driver won't show on many Linux OS's. Blacklist by default.

    USB antenna should load a serial/usb driver when hot-plugged.

    But it's as you say, probably hardware.
     
  6. cleatus

    cleatus Notebook Enthusiast

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    this is Win 7 64.
    its so odd as there dosnet seem to be a trigger-- they just stop working.
     
  7. SHEEPMAN!

    SHEEPMAN! Freelance

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    Sorry not enough coffee.

    Forget the USB antenna.....

    Can you pull the bottom cover or are there warranty issues?
     
  8. cleatus

    cleatus Notebook Enthusiast

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    can prob pull-- I did find a video on installing a gps module. maybe could have a look.
    don't think its shock or bumping around that's breaking it --- I have one Toughbook that sits at my desk--- now that one stopped working.
     
  9. SHEEPMAN!

    SHEEPMAN! Freelance

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    Just to see the layout.
    Whether lid antenna goes direct to gps or to a passthrough and then jumpered.
    And if the bottom fell off of one accidently you could attach a spare antenna direct to gps device and just throw it on the desk for test purposes.
    Hmmmm, I wonder if the machines were spec-ed with a gps battery. Visible through the ram door on a MK2. Antenna not visible. END EDIT
    LEFT IS GPS BATTERY ATTACH POINT ...RIGHT IS FPC/MOBO CONNECTOR
    circ11.JPG
     
    Last edited: Feb 6, 2018
  10. cleatus

    cleatus Notebook Enthusiast

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    wow....do I feel like an idiot....time to eat crow.

    Not saying its the entire issue, as I have had to send back a couple that the users said were not working...buuuuuuuuuuuuuuuut.....

    It turns out they had all the windows here at work tinted...apparently with security/metallic tint....FFS...

    They used to work in my office if I put them in the window, they would get a good GPS fix. Not so much now...lol....FAIL.

    If I walk outside in the -3 deg weather, it will get a signal in about 1 min. When I bring it back in, the signal drops to nothing.

    All this time I have been looking for a "tech fix", when it looks like it was something as stupid as window tint.



    Wow.o_Oo_Oo_Oo_Oo_Oo_Oo_Oo_Oo_Oo_Oo_Oo_Oo_Oo_Oo_Oo_Oo_O

    Thanks to all that have helped.

    I am going to go be an idiot in the corner...
     
    toughasnails and SHEEPMAN! like this.
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