Samsung PN51E530A3FXZA wont turn on

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  • bigmatt0211
    Member
    • Dec 2015
    • 44
    • United States

    #1

    Samsung PN51E530A3FXZA wont turn on

    Hey everyone, I stumbled upon this great resource and am looking for some help. I have worked on all different kinds of electronics, but never a TV, so I am having fun learning all new things.

    I was given a samsung plasma because it wasn't turning on. When I first plugged it in, the Samsung start up chime would happen, but no image. The red LED on the front would blink 6 times and stop. My first thought was bad caps or blown fuse, being inexperienced with this kind of stuff. So, I pulled off the back, inspected all the caps and checked the fuse, all seemed to check out. THe logic board LED stayed on for 5 secs, turned off for a second or two, then back on for 5. I began doing research, and first tested the Vs and Va voltages. After checking it a few times, I realized that the power supply was shutting down very soon after the chime, so I only had a few seconds each time to check the voltages. The Vs hit 209v and the Va was 59v, per spec. So that was good. Next, I tried checking the Vscan and Ve, I found the Vscan, but really didn't seem to get the -187v. I didn't get a negative at all actually, it was something like 5v. I couldn't find the Ve (yet).

    So, not knowing where to go next and watching tons of videos/reading tons of forums, I started pulling apart the y buffer to test the chips. They seemed ok, but my multimeter isn't very fancy.

    Next, I decided to pull the X-buffer off and inspect it all thoroughly, nothing obvious.

    So, now I'm here today. I put everything back together, but some new behavior is happening. Once everything is connected, the TV will not chime at all, and the logic board just flashes occasionally. If I disconnect the X-buffer from the power supply, the TV will then chime when plugged in, and then chimes a few more times. Another thing is the Vs and Va voltages are gone. I noticed one thing. With the X buffer, there is continuity between Vs and ground. The moment I plug in the power supply to the buffer, the Vs grounds. There is nothing visibly wrong with the buffer, and I am not sure why it would have changed after disconnecting it.

    I would love to solve this. It's an interesting and new challenge. Please, if anyone could help me, I would be greatly appreciative.
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  • bigmatt0211
    Member
    • Dec 2015
    • 44
    • United States

    #2
    Re: Samsung PN51E530A3FXZA wont turn on

    Anybody have any ideas? I'm pretty much open to try whatever.

    Comment

    • ReeceyBurger123
      Never Give Up !
      • May 2014
      • 7325
      • Britain

      #3
      Re: Samsung PN51E530A3FXZA wont turn on

      Disconnect the Ymain from the Xmain see if it boots, if so order a Ymain. I repaired the E550 with that Ymain shorted 30F124 fets on it.
      Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

      https://www.facebook.com/Telford-Tel...7894576335359/

      Comment

      • ReeceyBurger123
        Never Give Up !
        • May 2014
        • 7325
        • Britain

        #4
        Re: Samsung PN51E530A3FXZA wont turn on

        The Ymain is the board on the left hand side of the Tv with you facing the back.
        Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

        https://www.facebook.com/Telford-Tel...7894576335359/

        Comment

        • bigmatt0211
          Member
          • Dec 2015
          • 44
          • United States

          #5
          Re: Samsung PN51E530A3FXZA wont turn on

          Thank you for your help. I believe, and may be wrong, that this version has an upper and lower x-buffer on the right, and an X/Y-main on the left, with a long y-buffer to the left of it. So, I am unsure how I can disconnect the y-main from the x-main when it is one unit.

          Comment

          • bigmatt0211
            Member
            • Dec 2015
            • 44
            • United States

            #6
            Re: Samsung PN51E530A3FXZA wont turn on

            Does anyone else have any thoughts or insight?

            Comment

            • bigmatt0211
              Member
              • Dec 2015
              • 44
              • United States

              #7
              Re: Samsung PN51E530A3FXZA wont turn on

              So been messing with it, but still haven't run into anything new. I still have no idea where to go.

              Comment

              • Sevenqi
                Badcaps Veteran
                • Jul 2011
                • 292

                #8
                Re: Samsung PN51E530A3FXZA wont turn on

                I have a PN51E535A, exact same board I believe, same symptom, the vs and va were normal for a second then dropped to 1x voltage in a minutes.

                I checked all the fets in the y main, but non was shorted. Not sure what to do for these models of plasma.

                Comment

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