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Thread: Reusing color LCD from Samsung mobile model SGH-X620

  1. #1
    Member Advanced User sushmair's Avatar
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    Default Reusing color LCD from Samsung mobile model SGH-X620

    I have this LCD screen - its still connected to the cellphone motherboard through its ribbon cable. It has 30 pins. I have its pinout and schematic. The problem is how do I desolder / remove the LCD from its current connection? It is entirely an SMD assembly and looks very tricky. Is what I am trying to do even possible?

    Rgds,
    sushmair.

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    Member Advanced User MGear's Avatar
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    Sounds exciting to me... Makes me remember those hack n solder days.

    Nyways... Do you mind posting a Snap of that connection. That way we'll be able to give you exact steps.

  3. #3

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    I did something similar with a SE T230 colour LCD, i removed the cable from the phone,and then had to do some fine soldering on the ribbon, it worked quite well.

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    Member Advanced User sushmair's Avatar
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    @MGear - have attached the pics.

    @shobhit - thanks! that is encouraging.

    Rgds,
    sushmair.
    Attached Images Attached Images

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    Senior Member T-1000 akshay66's Avatar
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    De soldering is not the problem it can easily be de-soldered(If are bad at de soldering got to mobile phone repair shop & ask the guy to de-solder it.)
    Soldering it again on a different PCB is a problem.What you can do is don't de-solder it & get 30 thin wires soldered on the same PCB by expert such as the mobile phone guy.

    Regards Akshay,
    Redefine it your way!!!!

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    Administrator T-1000 rao's Avatar
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    Use a sharp tipped soldering iron, let it heat up well before using. Be very careful about the contact time with the ribbon and keep giving breaks so as to not heat up the ribbon too much, I dont think it will be that big a problem.

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    Member Advanced User MGear's Avatar
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    Sushmair You have got your answers now,

    A friend of mine suggested using the hot air desoldering gun to the remove the lcd.
    I would like to know that how would you use the LCD after removing it. Because some time ago I hacked the Calculator LCD screen n was not able to reuse it in my Circuit.
    Any Ideas??

  8. #8
    Member Advanced User sushmair's Avatar
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    @MGear, I plan to use it in a soft toy for showing simple colors and shapes and marry that with a webcam based image recognition system that I built using an open library. However, I haven't really gotten around to figure out how to interface this particular LCD...

  9. #9

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    Go through it's datasheet, it should have plenty of info on how to interface it with your uC

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    Super Moderator T-1000 docel's Avatar
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    Dump solder-flux on the solder joints before desoldering.
    Use a thread to pull the flex pcb away as you desolder. The thread must run BETWEEN the flex pcb & the main board, under tension, as you heat the joint.
    docel
    ^Anything is possible..
    after YOU prove it!!

    http://bangalorerobotics.tripod.com

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