lg 42pt350r plasma

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  • hispeck
    Badcaps Veteran
    • Aug 2015
    • 258
    • nigeria
    #1

    lg 42pt350r plasma

    Hello friends, please i need help. some guys just messd up this tv by removing some igbt mosfet , so am having issue knowing the right component. can anyone who have very good insight about this tv tell me the real numbers and positions of the mosfets in the ysus board.
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    • hispeck
      Badcaps Veteran
      • Aug 2015
      • 258
      • nigeria
      #2
      Re: lg 42pt350r plasma

      i can see on the ysus every component like the sus-dn is 30f124 sus-up 30f124 same number . but i was told in this forum that sus-dn and sus-up dont use same number

        Comment

        • Biruslapio
          Badcaps Veteran
          • Nov 2013
          • 552
          • Brasil
          #3
          Re: lg 42pt350r plasma

          30F124 and IRG71C28U are used, I have two of these tvs here because the "technician" that touched them destroyed the boards.
          Information I found on the internet is:

          Q708 Q709 - IRG71C28U
          Q713 Q703 - 30F124
          Q711 Q710 - FDP33N25
          IC701 - ADUM1234
          IC702 IC703 IC711 - FAN73711

          The ADUM and FAN rarely fail.

          The IRG are 600V high current IGBTs, I've read on forums about 30J127 and RJP63F3 could be used in their places, but there are slim chances of buying any of those that wouldn't be a fake.
          Last edited by Biruslapio; 09-16-2020, 02:54 PM.

            Comment

            • hispeck
              Badcaps Veteran
              • Aug 2015
              • 258
              • nigeria
              #4
              Re: lg 42pt350r plasma

              So are you saying that 30j124 was not used in this ysus ? Tomorrow I will cross check with the list you just posted. Thanks a lot for your time
              Last edited by hispeck; 09-18-2020, 12:17 PM.

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                • Biruslapio
                  Badcaps Veteran
                  • Nov 2013
                  • 552
                  • Brasil
                  #5
                  Re: lg 42pt350r plasma

                  Originally posted by hispeck
                  So are you saying that 30j124 was not used in this ysus ? Tomorrow I will cross check with the list you just posted. Thanks a lot for your time
                  I don't know if it's originally on this board, because both of mine had all the IGBTs missing too, but all the repair kits use the IRG intead of 30J124 or 30J127, and the brazilian forum I've read multiple users said that the board comes with IRGs.
                  Last edited by Biruslapio; 09-18-2020, 01:45 PM.

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                    • hispeck
                      Badcaps Veteran
                      • Aug 2015
                      • 258
                      • nigeria
                      #6
                      Re: lg 42pt350r plasma

                      But is yours working now? Please check the values you have on Q705 and Q712.

                        Comment

                        • Biruslapio
                          Badcaps Veteran
                          • Nov 2013
                          • 552
                          • Brasil
                          #7
                          Re: lg 42pt350r plasma

                          none of them are working, and they won't for a long time until I can get a Y-SUS replacement because the dumbass that messed with them ripped all the traces out.
                          If the IGBTs or MOSFETs are defective, there will be a short between their pins, measuring at max 100 OHMs, pretty easy to spot the failure at these Y-SUS boards, the problem is getting original parts to replace with.

                            Comment

                            • hispeck
                              Badcaps Veteran
                              • Aug 2015
                              • 258
                              • nigeria
                              #8
                              Re: lg 42pt350r plasma

                              My comes up and work for a while and blowing up Q708/ Q709 and Q703/Q713

                                Comment

                                • Biruslapio
                                  Badcaps Veteran
                                  • Nov 2013
                                  • 552
                                  • Brasil
                                  #9
                                  Re: lg 42pt350r plasma

                                  It has perfect image for a few minutes then blow up? probably counterfeit IGBTs, what are you replacing them with?
                                  Chech the heatsinks for overheat, they probably can handle the peak voltage but not the current, this is why they fail.
                                  Last edited by Biruslapio; 09-19-2020, 04:51 PM.

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