Problem with Samsung Plasma PS43D450

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  • Mikeyboy2007
    Badcaps Veteran
    • Mar 2013
    • 745
    • Scotland

    #21
    Re: Problem with Samsung Plasma PS43D450

    only Vs and Va on PSU tom.

    Comment

    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK

      #22
      Re: Problem with Samsung Plasma PS43D450

      Ve is on X-main.
      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

      • Mikeyboy2007
        Badcaps Veteran
        • Mar 2013
        • 745
        • Scotland

        #23
        Re: Problem with Samsung Plasma PS43D450

        these are the only ones on the Xmain Tom :
        Attached Files

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK

          #24
          Re: Problem with Samsung Plasma PS43D450

          There are two jumpers marked VE at the top of the X-main board. Test one of those.
          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

          • Mikeyboy2007
            Badcaps Veteran
            • Mar 2013
            • 745
            • Scotland

            #25
            Re: Problem with Samsung Plasma PS43D450

            tested both VE jumpers Tom and only returning 94v ?

            Comment

            • tom66
              EVs Rule
              • Apr 2011
              • 32560
              • UK

              #26
              Re: Problem with Samsung Plasma PS43D450

              That is fine. So, -Vsc, Ve, Vs is OK, what does Va test at? It could be a bad control board or X-/Y-main board. Hard to tell without a scope on the boards.
              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

              • Mikeyboy2007
                Badcaps Veteran
                • Mar 2013
                • 745
                • Scotland

                #27
                Re: Problem with Samsung Plasma PS43D450

                deffo VE Tom. took picture of what i was testing and also what board it was on.
                Attached Files

                Comment

                • tom66
                  EVs Rule
                  • Apr 2011
                  • 32560
                  • UK

                  #28
                  Re: Problem with Samsung Plasma PS43D450

                  I know Ve is fine. 94V is OK for this generation of plasma panel. I want you to test VA.
                  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

                  • Mikeyboy2007
                    Badcaps Veteran
                    • Mar 2013
                    • 745
                    • Scotland

                    #29
                    Re: Problem with Samsung Plasma PS43D450

                    VA on PSU was testing 57v tested jumper with circle.
                    Attached Files

                    Comment

                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK

                      #30
                      Re: Problem with Samsung Plasma PS43D450

                      So, I don't have any immediate suggestions without a test using an oscilloscope.
                      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

                      • Mikeyboy2007
                        Badcaps Veteran
                        • Mar 2013
                        • 745
                        • Scotland

                        #31
                        Re: Problem with Samsung Plasma PS43D450

                        so bummed out on this one. would it be worth chucking into a TV repair shop ? only paid £20 for the tv.

                        Comment

                        • tom66
                          EVs Rule
                          • Apr 2011
                          • 32560
                          • UK

                          #32
                          Re: Problem with Samsung Plasma PS43D450

                          A TV repair shop will probably tell you bad panel (which is wrong - the only two ways a plasma panel goes bad is a stuck line on the screen, or a crack in the panel), or charge too much to be worth it.

                          Consider investing in a cheap scope. I sold my old 20MHz scope on eBay for about £35 delivered and there are plenty of others out there. Used that for all my plasma repairs, before I upgraded to the Rigol.

                          Scope just needs to be 20MHz or more, with a 10X probe (can be purchased later) and 300Vpk input or more. Analog CRT. Don't bother with a toy scope, such as a DSO Nano - not worth it.
                          Last edited by tom66; 07-12-2014, 04:04 PM.
                          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

                          • Mikeyboy2007
                            Badcaps Veteran
                            • Mar 2013
                            • 745
                            • Scotland

                            #33
                            Re: Problem with Samsung Plasma PS43D450

                            even if i purchased the oscilloscope i know i would have no clue how to work it out, seems like a lot of functions and dials on them.

                            Comment

                            • martino
                              Not so "senior"
                              • Aug 2013
                              • 997
                              • canada

                              #34
                              Re: Problem with Samsung Plasma PS43D450

                              Originally posted by Mikeyboy2007
                              even if i purchased the oscilloscope i know i would have no clue how to work it out, seems like a lot of functions and dials on them.
                              I'm sure Tom will talk you through how to set it up....
                              Proud owner of dozens of broken TV's and many,many,many boards.


                              Our website and passion:http://hollenhundshepherds.com/

                              Comment

                              • tom66
                                EVs Rule
                                • Apr 2011
                                • 32560
                                • UK

                                #35
                                Re: Problem with Samsung Plasma PS43D450

                                I'm willing to help you in using one, but fundamentally they're pretty simple devices. The volt scale is like setting the range on a multimeter. A scope just shows you a reading in time, as well as in volts. So you can see what a voltage does over time, which is vital because a plasma display works on a waveform that changes thousands of times per second. Then there is a trigger setting, which helps keep the scope synchronised and keeps the display stable - that's just a voltage setting - if the scope sees a rising voltage or falling voltage of that level, it'll sync onto it. Most of the other stuff can be ignored for simple tests. When I am fiddling with a scope, I am 99% of the time changing volts/div, time/div or trigger level. Everything else can be left in a standard setting.
                                Last edited by tom66; 07-12-2014, 05:00 PM.
                                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

                                • Mikeyboy2007
                                  Badcaps Veteran
                                  • Mar 2013
                                  • 745
                                  • Scotland

                                  #36
                                  Re: Problem with Samsung Plasma PS43D450

                                  ok Tom thanks. is there any cheap oscilloscopes you reccomend and il buy on FleEBay tonight

                                  Comment

                                  • tom66
                                    EVs Rule
                                    • Apr 2011
                                    • 32560
                                    • UK

                                    #37
                                    Re: Problem with Samsung Plasma PS43D450

                                    Bed time for me, just browse for now.

                                    You need a dual channel one, CRT analog (the old green/cyan tube ones.) It needs to be 20MHz or higher bandwidth. Aside from that, almost anything else is an added extra. If it comes with switchable 10X probes it'll save you from buying them.

                                    I'd recommend picking one up, but if shipped well they're fine. The tube can be delicate, subject to breakage etc.

                                    If you're unsure, post a link before buying.
                                    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

                                    • Mikeyboy2007
                                      Badcaps Veteran
                                      • Mar 2013
                                      • 745
                                      • Scotland

                                      #38
                                      Re: Problem with Samsung Plasma PS43D450

                                      Tom what i also noticed is i seen your video on the same tv with clicking / no power, when your tv switched on the green light on the control board stayed on however the one on mine repeatedly flashes no matter how long its left on

                                      should it be doing this ?

                                      Comment

                                      • tom66
                                        EVs Rule
                                        • Apr 2011
                                        • 32560
                                        • UK

                                        #39
                                        Re: Problem with Samsung Plasma PS43D450

                                        Repeated flashing every 1~2sec indicates a working control 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.

                                        Comment

                                        • Mikeyboy2007
                                          Badcaps Veteran
                                          • Mar 2013
                                          • 745
                                          • Scotland

                                          #40
                                          Re: Problem with Samsung Plasma PS43D450

                                          ok so got this hooked up to a oscilloscope from someone i know that owns one. he said it was most likely problem with Ymain so ordered a new one fron Fleebay and arrived today, tv working as new now. thanks for the help on this one.

                                          Comment

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