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    #1

    SAMSUNG LW26A33WX- no backlight

    Since my success with my first project (acer al2416) yesterday ive now got the solder bug, Anyhow while I was up the local dump today getting rid of a couple of dvd players I spied this samsung tft in amongst a pile of old crt tv`s, anyhow I grabbed it & got it home for my next project, seems the only problem is the inverter (DARFON 48.v1448.171/A), checked the fuses,caps etc as before & all seem fine, Then I checked the Inverter transformers & found one of them to have a dead short across pins 4&5 & signs of getting too warm so I will be replacing that, Ive found what i think is the correct one on ebay (4011A******) except they end with the letters GP whereas mine does not,Do the two letters make a difference,?
    I can take some photos tomorrow if itll help.,,,,cheers.
    Just to add the b/light flashes on then off.
    Last edited by froggy; 05-12-2011, 04:09 PM.
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    #2
    Re: SAMSUNG LW26A33WX- no backlight

    Originally posted by froggy View Post
    Then I checked the Inverter transformers & found one of them to have a dead short across pins 4&5 & signs of getting too warm so I will be replacing that,

    I can take some photos tomorrow if itll help.
    1) Depending on what you call pin 4 and 5, it should be shorted if they are primaries. See

    http://lcdparts.net/TransformerDetai...ProductID=3189

    2) It should go without saying that photos ALWAYS help.
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      #3
      Re: SAMSUNG LW26A33WX- no backlight

      I have tried to take a photo but the lights not that good so will do them in the morning,(its 11-25pm now) Pins 4 & 5 are secondarys, the seller kindly listed the way to check the transformers & going on his info this one is definately u/s as the others checked out as they should, its just that G,P on the end of the part number im not sure about.

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        #4
        Re: SAMSUNG LW26A33WX- no backlight

        Okay, I see the ebay auction.

        http://cgi.ebay.co.uk/NEW-LCD-INVERT...item3cb7491458

        Pins 4 and 5 are the same as the lcdparts.net secondaries info so you should desolder that transformer and verify that it is shorted "out of circuit".
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          #5
          Re: SAMSUNG LW26A33WX- no backlight

          On Darfon transformers the first 5 (4?) characters are significant. For example, one I have here is 4006A508019. 508019 is some sort of a production code.

          PlainBill
          For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

          Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

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            #6
            Re: SAMSUNG LW26A33WX- no backlight

            Thanks PlainBill for that info, I guessed it might be something like that due to the transformers having all different numbers after the 4011A, it was just the G,P lettering on it that i found odd as mine only has numbers,
            Ive now checked the suspected unit out of circuit & it does show it shorting over the secondarys so i`ll get one bought today,,,,,,cheers.
            Attached Files

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              #7
              Re: SAMSUNG LW26A33WX- no backlight

              Quick update, Inverter transformer arrived this morning, got it all fitted & TV now working fine & a perfect picture,Now ive just got to find some screws that hold the back on as it only had two in it when i got it from the dump!.

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