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Samsung Plasma PS43E470 Fault with dark bruise image

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    Samsung Plasma PS43E470 Fault with dark bruise image

    Hi everyone!

    My TV Samsung Plasma got problem with fault: Have sound but no picture and I try to fix it.
    After replace Y-SUS board and fixed X-buffer board, it works now.

    However, the image have some darkness and sparkle fixed parts.

    I have try to adjust Vs, Va and Vsc and I noticed If I increase Vs, the dark part reduce but It comes to limited voltage values and it is so higher than to standard by Factory Recommend (Vs now 219v rather ~205v)

    I actually not know which parts I need to take care now, so I need some help from someone?
    This is some pictures of its
    https://imgur.com/KjE3xg6
    https://imgur.com/tPFTQ5d
    Attached Files
    Last edited by longnguyen; 08-17-2018, 12:07 PM. Reason: post images

    #2
    Re: Samsung Plasma PS43E470 Fault with dark bruise image

    I suspect you have an issue with the Zsus

    Comment


      #3
      Re: Samsung Plasma PS43E470 Fault with dark bruise image

      Originally posted by chrismurphy View Post
      I suspect you have an issue with the Zsus
      You mean my X-buffer board has problem?

      Comment


        #4
        Re: Samsung Plasma PS43E470 Fault with dark bruise image

        yes or very bad panel

        Comment


          #5
          Re: Samsung Plasma PS43E470 Fault with dark bruise image

          I have already change 4 IGBTs on this board, an driver buffer for there couple IGBTs, and Hope my replacement work well. But the result is not perfect. I suspect that my IGBTs are not good because when I checked them by my DMM in Resistor Mode they discharged differently. Do you think it is the cause?

          Comment


            #6
            Re: Samsung Plasma PS43E470 Fault with dark bruise image

            Finally, after purchase a X board from Samsung Service Center. My TV has work fine now.

            I post this result to share with all of you in case you fall into the same situation like me.
            Attached Files

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