Lg 50pg60

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  • arbitarytwist
    Member
    • Nov 2016
    • 31
    • Canada
    #1

    Lg 50pg60

    I picked up an LG 50PG60 with a blank screen but has sound.

    I pulled the Y Buffer and checked for IC shorts and it seem to be ok. I am not sure how i would check the Y-Sus and Z-Sus boards. I checked the power to Vs and Va and they all seem to be within spec.

    First time trying to fix a TV let alone a Plasma. Have electrical knowlege but no electronics expert.

    See link below for a video. Screen comes on bright and then goes dark. There are two vertical bands towards the right of the tv screen (bottom in this video as the TV is sitting sideways).

    https://www.youtube.com/watch?v=GiaB...ature=youtu.be

    EDIT: Added Pictures
    Attached Files
    Last edited by arbitarytwist; 11-11-2016, 12:52 PM.
    Tags: None
    • Hamie
      Badcaps Legend
      • Apr 2014
      • 1383
      • UK
      #2
      Re: Lg 50pg60

      Pictures of the boards would be handy.

        Comment

        • arbitarytwist
          Member
          • Nov 2016
          • 31
          • Canada
          #3
          Re: Lg 50pg60

          Originally posted by Hamie
          Pictures of the boards would be handy.
          Added pictures to original post.

            Comment

            • Hamie
              Badcaps Legend
              • Apr 2014
              • 1383
              • UK
              #4
              Re: Lg 50pg60

              OK so this model should run and display an image with the z-sus disconnect form the PSB.

              Does it?

                Comment

                • arbitarytwist
                  Member
                  • Nov 2016
                  • 31
                  • Canada
                  #5
                  Re: Lg 50pg60

                  Originally posted by Hamie
                  OK so this model should run and display an image with the z-sus disconnect form the PSB.

                  Does it?
                  So i disconnected both power connectors to the Z-SUS. TV comes on, although not the initial bright screen. Still see the two bands on the screen as before.

                    Comment

                    • Hamie
                      Badcaps Legend
                      • Apr 2014
                      • 1383
                      • UK
                      #6
                      Re: Lg 50pg60

                      Sorry I don't see what bands your talking about in your video. Video isn't of great quality.

                      You're going to need to check voltages on the y-sus.

                      VZB and Vy


                      Vy is located here. Negative probe on - test point, positive to the leg of the resistor.

                      Can't see vsc but it will be there somewhere.

                        Comment

                        • Hamie
                          Badcaps Legend
                          • Apr 2014
                          • 1383
                          • UK
                          #7
                          Re: Lg 50pg60

                          Pic
                          Attached Files

                            Comment

                            • arbitarytwist
                              Member
                              • Nov 2016
                              • 31
                              • Canada
                              #8
                              Re: Lg 50pg60

                              Originally posted by Hamie
                              Sorry I don't see what bands your talking about in your video. Video isn't of great quality.

                              You're going to need to check voltages on the y-sus.

                              VZB and Vy


                              Vy is located here. Negative probe on - test point, positive to the leg of the resistor.

                              Can't see vsc but it will be there somewhere.
                              Vy = 180.6V
                              Vsc = 150.4V

                              See attached pic of when the screen comes on bright and then it goes dim. I get those vertical bands. Don't know if its something after i removed the Y-Buffer boards or before.
                              Attached Files

                                Comment

                                • Hamie
                                  Badcaps Legend
                                  • Apr 2014
                                  • 1383
                                  • UK
                                  #9
                                  Re: Lg 50pg60

                                  OK so y-sustain is working fine.
                                  However Id probably stop working on this TV as by the looks of your picture the panel is toast.

                                  Black vertical bars are never a good sign for a plasma.

                                    Comment

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