Samsung PN50B450B1DXZA Red Sparkles

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  • Audioplus
    Senior Member
    • Feb 2012
    • 157
    • USA
    #1

    Samsung PN50B450B1DXZA Red Sparkles

    After repairing the Power issue with a new X Board, the set powered up, but has an amazing amount of Red Sparkles. I'm assuming that is a common issue? I updated the firmware which improved somewhat.
    Any comments on this issue?
    Tags: None
    • Audioplus
      Senior Member
      • Feb 2012
      • 157
      • USA
      #2
      Re: Samsung PN50B450B1DXZA Red Sparkles

      did some research, guess when the Y Board is upgraded (replaced originally), the X board should be too, or vice versa. Anyone want to comment?
      Firmware and board adjustments are additional fixes. Sometimes they recommend replacing all the boards.
      Last edited by Audioplus; 08-27-2014, 01:15 PM. Reason: Update

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK
          #3
          Re: Samsung PN50B450B1DXZA Red Sparkles

          What voltage is Vs currently set to? Try lowering it by 10V.
          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

            • Audioplus
              Senior Member
              • Feb 2012
              • 157
              • USA
              #4
              Re: Samsung PN50B450B1DXZA Red Sparkles

              Tom, is that on the X Board?

              Thank you!
              Last edited by Audioplus; 08-27-2014, 07:12 PM. Reason: comment

                Comment

                • Audioplus
                  Senior Member
                  • Feb 2012
                  • 157
                  • USA
                  #5
                  Re: Samsung PN50B450B1DXZA Red Sparkles

                  Received a comment from client that when the TV turns on it's somewhat OK, then the red sparkles get progressively worse to the point where you can't watch it. When the TV is turned off for awhile and turned on, it's OK then the whole scenario is recreated.
                  Do you still think it's the Vs voltage?
                  Please confirm if that is on the X board

                    Comment

                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK
                      #6
                      Re: Samsung PN50B450B1DXZA Red Sparkles

                      Vs is on the power supply.
                      I'm not sure about the particular fault, but it's in a Samsung tech doc.
                      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

                        • Audioplus
                          Senior Member
                          • Feb 2012
                          • 157
                          • USA
                          #7
                          Re: Samsung PN50B450B1DXZA Red Sparkles

                          I found the Vs test point and adjustment on the power supply. Should I also perform a factory reset or
                          'Alignments should be performed whenever a panel is replaced or the SMPS, or Y
                          Main board. Alignments such as Option Bytes and White balance should at least be
                          checked for accuracy.'
                          As mentioned in the Service Manual?
                          These older plasma's are not very easy to trouble shoot.
                          Thank you!

                            Comment

                            • tom66
                              EVs Rule
                              • Apr 2011
                              • 32560
                              • UK
                              #8
                              Re: Samsung PN50B450B1DXZA Red Sparkles

                              No, just decrease Vs.
                              These older plasmas are easier for troubleshooting, they don't shut everything down after only one fault...
                              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

                                • Audioplus
                                  Senior Member
                                  • Feb 2012
                                  • 157
                                  • USA
                                  #9
                                  Re: Samsung PN50B450B1DXZA Red Sparkles

                                  The voltage at Vs and Va were identical to panel sticker. I decreased Vs from 209 down to 200. Still has sparkles, whether it's any better, I'm waiting to hear back from client?

                                    Comment

                                    • tom66
                                      EVs Rule
                                      • Apr 2011
                                      • 32560
                                      • UK
                                      #10
                                      Re: Samsung PN50B450B1DXZA Red Sparkles

                                      Any chance of a photo of the fault?
                                      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

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