42PA30RQ Troubleshooting Dim Raster and Image

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  • corkyapv
    Member
    • Feb 2014
    • 12
    • Puerto Rico

    #1

    42PA30RQ Troubleshooting Dim Raster and Image

    VSus, VA good. Logic Board, Y, X and buffers. Unit turns on with no problem sound working, logic board led blinks once every second. Not sure if panel is defective.

    Have read through the forum still unable to find corrective action. Thanks in advanced to all.
    Last edited by corkyapv; 02-18-2014, 12:18 PM.
  • Alastair E
    Chief Womble
    • Mar 2013
    • 1963
    • U.K.

    #2
    Re: 42PA30RQ Troubleshooting Dim Raster and Image

    Dim picture generally X_SUS faults.....

    Check the waveform at the TP or the panel connector....
    TELEFIX

    How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
    http://www.irf.com/technical-info/appnotes/an-1088.pdf
    PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!

    Comment

    • corkyapv
      Member
      • Feb 2014
      • 12
      • Puerto Rico

      #3
      Re: 42PA30RQ Troubleshooting Dim Raster and Image

      I have replaced X board sorry for not mentioning.

      Comment

      • tom66
        EVs Rule
        • Apr 2011
        • 32560
        • UK

        #4
        Re: 42PA30RQ Troubleshooting Dim Raster and Image

        Can we see a picture? Not all X-main you buy from eBay are tested and working...
        Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
        For service manual, schematic, boardview (board view), datasheet, cad - use our search.

        Comment

        • Alastair E
          Chief Womble
          • Mar 2013
          • 1963
          • U.K.

          #5
          Re: 42PA30RQ Troubleshooting Dim Raster and Image

          Have you tried running the test-pattern functions direct from the Control-Board?
          TELEFIX

          How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
          http://www.irf.com/technical-info/appnotes/an-1088.pdf
          PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!

          Comment

          • corkyapv
            Member
            • Feb 2014
            • 12
            • Puerto Rico

            #6
            Re: 42PA30RQ Troubleshooting Dim Raster and Image

            Thanks for the pdf. I have attached a photo display.
            Attached Files

            Comment

            • corkyapv
              Member
              • Feb 2014
              • 12
              • Puerto Rico

              #7
              Re: 42PA30RQ Troubleshooting Dim Raster and Image

              I have ran the test pattern they are seen on the background very dim. Also checked LVDS cable for continuity.

              Comment

              • lookimback
                Badcaps Legend
                • Aug 2013
                • 1489
                • USA

                #8
                Re: 42PA30RQ Troubleshooting Dim Raster and Image

                In my opinion, parts for this particular TV should only be purchased from Shopjimmy or another reputable supplier. I say this because the majority of parts sold on Ebay really are not tested, and, in this particular model there is a high probability of a defective board damaging other boards.

                Also, I checked Shopjimmy yesterday while working on same model and parts are same price or cheaper than current Ebay listings.
                Last edited by lookimback; 02-18-2014, 12:23 PM.
                ------------signature starts here------------


                Comment

                • corkyapv
                  Member
                  • Feb 2014
                  • 12
                  • Puerto Rico

                  #9
                  Re: 42PA30RQ Troubleshooting Dim Raster and Image

                  You are right I did get the boards from ebay. Now that was my mistake. I did check the boards for shorts and buffers as per video. Dont have schematic for the X board, are there any voltage checks and can make to verify output?

                  Comment

                  • corkyapv
                    Member
                    • Feb 2014
                    • 12
                    • Puerto Rico

                    #10
                    Re: 42PA30RQ Troubleshooting Dim Raster and Image

                    Originally posted by lookimback
                    In my opinion, parts for this particular TV should only be purchased from Shopjimmy or another reputable supplier. I say this because the majority of parts sold on Ebay really are not tested, and, in this particular model there is a high probability of a defective board damaging other boards.

                    Also, I checked Shopjimmy yesterday while working on same model and parts are same price or cheaper than current Ebay listings.
                    I have no problem ordering the board again. Is just I have invested time and a lot of effort on this unit. Would hate to have it scrap

                    Comment

                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK

                      #11
                      Re: 42PA30RQ Troubleshooting Dim Raster and Image

                      Its definitely an X-main problem looking at that if that helps.
                      Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                      For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                      Comment

                      • corkyapv
                        Member
                        • Feb 2014
                        • 12
                        • Puerto Rico

                        #12
                        Re: 42PA30RQ Troubleshooting Dim Raster and Image

                        Originally posted by tom66
                        Its definitely an X-main problem looking at that if that helps.
                        I will order another X board and post results. It should take about 10 days. Any chances of short on the display. Thanks Tom

                        Comment

                        • corkyapv
                          Member
                          • Feb 2014
                          • 12
                          • Puerto Rico

                          #13
                          Re: 42PA30RQ Troubleshooting Dim Raster and Image

                          Originally posted by tom66
                          Its definitely an X-main problem looking at that if that helps.
                          Tom I found this after removing front cover, is this repairable? I see small sparks when tv is initialized. Thanks...
                          Attached Files
                          Last edited by corkyapv; 02-18-2014, 07:38 PM. Reason: forgot to add image

                          Comment

                          • tom66
                            EVs Rule
                            • Apr 2011
                            • 32560
                            • UK

                            #14
                            Re: 42PA30RQ Troubleshooting Dim Raster and Image

                            Where are the sparks occurring? Possible to get a video?
                            Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                            For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                            Comment

                            • corkyapv
                              Member
                              • Feb 2014
                              • 12
                              • Puerto Rico

                              #15
                              Re: 42PA30RQ Troubleshooting Dim Raster and Image

                              Originally posted by tom66
                              Where are the sparks occurring? Possible to get a video?
                              It happens at this connection looks like corrosion, humidity. Initial spark only on this top connector which powera from main x board. All others look clean .

                              Comment

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