50" insignia turns on and off repeatedly

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  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #21
    Re: 50" insignia turns on and off repeatedly

    With X-main and Y-main unplugged, any difference in behaviour?
    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.

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    • j33jared
      Member
      • Jan 2014
      • 31
      • US

      #22
      Re: 50" insignia turns on and off repeatedly

      Is this showing the powerboard bad or vs is bad

      Comment

      • tom66
        EVs Rule
        • Apr 2011
        • 32560
        • UK

        #23
        Re: 50" insignia turns on and off repeatedly

        Those voltages can be low if the X-main or Y-main is bad. So it's important to isolate them first to see if the power board is bad or not.
        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.

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        • j33jared
          Member
          • Jan 2014
          • 31
          • US

          #24
          Re: 50" insignia turns on and off repeatedly

          When I take plug off going to right board nothing changes.

          When I unplug left board the va reads about 120 steady. The vs then reads funny. Just has a 1 at the left side of meter. When I take black lead off it jumps to 25 for a second before going to 0

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          • tom66
            EVs Rule
            • Apr 2011
            • 32560
            • UK

            #25
            Re: 50" insignia turns on and off repeatedly

            Is your meter set to the 200V DC range, or 200V AC range? You want DC.
            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

            • j33jared
              Member
              • Jan 2014
              • 31
              • US

              #26
              Re: 50" insignia turns on and off repeatedly

              Ok switched to dc

              With left board unplugged the va reads 55 and still getting funky reading from vs

              With both plugged in I get about 23 out of va before counting down to 3 and vs gets up to about .6

              With right unplugged I get the same 23 and .6

              Comment

              • tom66
                EVs Rule
                • Apr 2011
                • 32560
                • UK

                #27
                Re: 50" insignia turns on and off repeatedly

                Sorry, my error. Try the one range higher than 200V, at 1000V.
                Vs can be around 210V so is enough to push your meter to over-range indication ("1" meaning input over-voltage, which isn't damaging, but you need to switch to next highest range.)
                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

                • j33jared
                  Member
                  • Jan 2014
                  • 31
                  • US

                  #28
                  Re: 50" insignia turns on and off repeatedly

                  On 1000

                  Right unplugged....getting 023 to 030 out of va and 001 out of vs

                  Both plugged in.....getting same

                  Left unplugged....getting 55 from va and 212 from vs

                  Comment

                  • tom66
                    EVs Rule
                    • Apr 2011
                    • 32560
                    • UK

                    #29
                    Re: 50" insignia turns on and off repeatedly

                    So, you have a short on the left board. If you mean left, looking from the rear, that's the Y-main board.
                    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.

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                    • j33jared
                      Member
                      • Jan 2014
                      • 31
                      • US

                      #30
                      Re: 50" insignia turns on and off repeatedly

                      Yeah when i say left that is from the back

                      Comment

                      • tom66
                        EVs Rule
                        • Apr 2011
                        • 32560
                        • UK

                        #31
                        Re: 50" insignia turns on and off repeatedly

                        Y-main then. Repairability limited, you can try replacing the IGBTs on it, but can be a lot of work and hardly worth it if board is cheap. Look for LJ9#-######A part number to find replacement part. Note last letter usually "A" but can vary.
                        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

                        • j33jared
                          Member
                          • Jan 2014
                          • 31
                          • US

                          #32
                          Re: 50" insignia turns on and off repeatedly

                          Looks like a little over a hundred for the ymain

                          Comment

                          • j33jared
                            Member
                            • Jan 2014
                            • 31
                            • US

                            #33
                            Re: 50" insignia turns on and off repeatedly

                            lj92-01601a

                            Comment

                            • tom66
                              EVs Rule
                              • Apr 2011
                              • 32560
                              • UK

                              #34
                              Re: 50" insignia turns on and off repeatedly

                              Hmm, so do you feel like replacing IGBTs then? It can be hard work, but will cost a lot less than $100, you would need a good quality soldering iron (temperature regulated) and good soldering skills.
                              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

                              • j33jared
                                Member
                                • Jan 2014
                                • 31
                                • US

                                #35
                                Re: 50" insignia turns on and off repeatedly

                                I have never done any soldering

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                                • j33jared
                                  Member
                                  • Jan 2014
                                  • 31
                                  • US

                                  #36
                                  Re: 50" insignia turns on and off repeatedly

                                  How much do you think those would cost

                                  Comment

                                  • tom66
                                    EVs Rule
                                    • Apr 2011
                                    • 32560
                                    • UK

                                    #37
                                    Re: 50" insignia turns on and off repeatedly

                                    Might be best to get a new board, then.

                                    Repair kit, should you find someone capable of installing it?
                                    http://www.shopjimmy.com/samsung-bn9...repair-kit.htm
                                    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

                                    • j33jared
                                      Member
                                      • Jan 2014
                                      • 31
                                      • US

                                      #38
                                      Re: 50" insignia turns on and off repeatedly

                                      Thanks for all the help. I think I should just get the board. I'm afraid I would have no idea what to do with that kit.

                                      Comment

                                      • tom66
                                        EVs Rule
                                        • Apr 2011
                                        • 32560
                                        • UK

                                        #39
                                        Re: 50" insignia turns on and off repeatedly

                                        If you buy from a seller which strips down TVs for parts, make sure to buy from one who guarantees them and offers a warranty and returns policy.
                                        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

                                        • j33jared
                                          Member
                                          • Jan 2014
                                          • 31
                                          • US

                                          #40
                                          Re: 50" insignia turns on and off repeatedly

                                          Any trusted sites to find lj92-01601a ?

                                          Comment

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