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    Backlit keyboard connection

    Discussion in 'Panasonic' started by dukeluca86, Mar 14, 2014.

  1. dukeluca86

    dukeluca86 Notebook Consultant

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    Hi, i bought a keyboard for a cf28, is a backlit non rubber model, i connected all the three connector to the respective connector holder, but none happens. What am i doing bad ? If anyone knows the pinout of the KBbackilt connector (3 wire) i can test it stand alone to check if it's good.
     
    dukeluca86, Mar 14, 2014
    #1
  2. dukeluca86

    dukeluca86 Notebook Consultant

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    [​IMG]

    This is it
     
    dukeluca86, Mar 14, 2014
    #2
  3. ohlip

    ohlip Toughbook Modder

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    I've guess your unit don't have a keyboard inverter.


    ohlip
     
    ohlip, Mar 14, 2014
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  4. unclemack

    unclemack Notebook Evangelist

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    Don't I remember that one of the flexi connectors needs flipping over to insert correctly?
    Either that or I'm having another senior moment... Nurse!... NURSE!!
     
    unclemack, Mar 14, 2014
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  5. capt.dogfish

    capt.dogfish The Curmudgeon

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    That's for later models. If that is the right emissive keyboard (technically electro-luminescent) for a CF-28 he will need the "Texas" inverter board to make it work. http://forum.notebookreview.com/panasonic/370512-unfamiliar-components-cf-28-a.html
    CAP
     
    capt.dogfish, Mar 14, 2014
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  6. dukeluca86

    dukeluca86 Notebook Consultant

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    If someone have some photos of this board, i think that i can try to replicate it, el wire are not too difficult to drive.
     
    dukeluca86, Mar 14, 2014
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  7. Shawn

    Shawn Crackpot Search Ninja and Options Whore

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    What version is the keyboard? Is it originally from a cf28 or a cf29?

    The ribbon cable with 3 wires makes me believe it's from a cf28. That inverter board creates a higher voltage to run the keyboard.

    Now if you got a keyboard from a cf29, that's a different story. They operate on 5VDC.
     
    Shawn, Mar 14, 2014
    #7
  8. dukeluca86

    dukeluca86 Notebook Consultant

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    No i disassebled the keyboard there's an "emissive" layer just underthe aluminium chassis that use two of the 3 wires (the middle wire is dead, just nc) so i should provide about 100vac, i think that i will make a little inverter, not so difficult, the ain problem is to do it very small, to fit it in a suitable place in the 28... maybe under the battery...
     
    dukeluca86, Mar 14, 2014
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  9. Shawn

    Shawn Crackpot Search Ninja and Options Whore

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    Shawn, Mar 14, 2014
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  10. dukeluca86

    dukeluca86 Notebook Consultant

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    Yes but the point is that i alread have this one... and payd it very low, about 18 euros (30usd), so i just want to make this one working, yesterday i connected a little transformer (not an autobot) and give it little hv spikes, it made some flashes, so it can be done. Now i just have to find a way to dimm it, if i can find the originale connection i can use it (it should be already dimmed), or can exploit the screen duty/enable signals to switch it on/off and dimm... Mhhhh....
     
    dukeluca86, Mar 15, 2014
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  11. capt.dogfish

    capt.dogfish The Curmudgeon

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    There is a picture of the board in the link I included in my first post on this thread.
    CAP
     
    capt.dogfish, Mar 15, 2014
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  12. Shawn

    Shawn Crackpot Search Ninja and Options Whore

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    Shawn, Mar 15, 2014
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  13. dukeluca86

    dukeluca86 Notebook Consultant

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    I managed to light the backlit keyboard but with my inverter is very dim, barely visible only in a dark room, i havo to do better on this, i will go on and have a couple of ideas, will report on next days, if i'm not too busy.
     
    dukeluca86, Mar 17, 2014
    #13