Panasonic 50" power supply, no standby +5V

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  • Neelix
    Senior Member
    • Oct 2013
    • 145
    • South Africa

    #21
    Re: Panasonic 50" power supply, no standby +5V

    Are you sure you cut open the correct jumper because in the picture the STB5V marking on the board have it's arrow pointing towards a different jumper or are the two jumpers connected?
    Last edited by Neelix; 01-12-2015, 08:30 AM.

    Comment

    • Nicholas
      Senior Member
      • Dec 2014
      • 60
      • Kingdom of Denmark

      #22
      Re: Panasonic 50" power supply, no standby +5V

      Hi, yeah, it goes through there. I checked it

      Thanks!

      Comment

      • Nicholas
        Senior Member
        • Dec 2014
        • 60
        • Kingdom of Denmark

        #23
        Re: Panasonic 50" power supply, no standby +5V

        Ok, with the external +5V added as standby voltage, I get three flashed from the
        front standby LED.

        I cannot turn it on.

        Comment

        • Nicholas
          Senior Member
          • Dec 2014
          • 60
          • Kingdom of Denmark

          #24
          Re: Panasonic 50" power supply, no standby +5V

          I have looked up the failure codes for Panasonic, it seems that three
          flashes mean a problem with the 3.3V on the SOS board(?)...what IS the
          SOS-board, and does this TV even have 3.3V?

          Thanks again!

          Nicholas

          Comment

          • Nicholas
            Senior Member
            • Dec 2014
            • 60
            • Kingdom of Denmark

            #25
            Re: Panasonic 50" power supply, no standby +5V

            Update. I got the ICs and removed the old one from the PSU board. It's a real
            mess, all the solder pads + some traces are gone.

            Does someone know where pin 1 should go? (See attached image beneath)

            Thanks
            Attached Files

            Comment

            • tw2005
              Badcaps Legend
              • Oct 2011
              • 6458
              • Australia

              #26
              Re: Panasonic 50" power supply, no standby +5V

              Originally posted by Nicholas
              Update. I got the ICs and removed the old one from the PSU board. It's a real
              mess, all the solder pads + some traces are gone.

              Does someone know where pin 1 should go? (See attached image beneath)

              Thanks
              It shows you in that picture, goes in as drawn. pin 1 is bottom left

              Comment

              • drussell
                Senior Member
                • Nov 2014
                • 144
                • Canada

                #27
                Re: Panasonic 50" power supply, no standby +5V

                He means, where does the trace actually go to? His pads and traces are gone and he's trying to figure out where it's supposed to go, what pin 1 is actually connected to, I believe...

                I don't have one here to look at for him, unfortunately...

                Anyone have good pictures of the back of this power supply board or an actual board that can look?
                Last edited by drussell; 01-23-2015, 10:12 PM.

                Comment

                • tw2005
                  Badcaps Legend
                  • Oct 2011
                  • 6458
                  • Australia

                  #28
                  Re: Panasonic 50" power supply, no standby +5V

                  best guess using a photo and schematic
                  Attached Files

                  Comment

                  • Nicholas
                    Senior Member
                    • Dec 2014
                    • 60
                    • Kingdom of Denmark

                    #29
                    Re: Panasonic 50" power supply, no standby +5V

                    Yes, not the direction of the IC but which leg goes where

                    tw2005, thanks! That really goes and above the call of duty. I'll go back
                    in when my daughter gives me second.

                    Thanks a lot for the drawing!!!

                    Nicholas

                    Comment

                    • tw2005
                      Badcaps Legend
                      • Oct 2011
                      • 6458
                      • Australia

                      #30
                      Re: Panasonic 50" power supply, no standby +5V

                      Originally posted by Nicholas
                      Yes, not the direction of the IC but which leg goes where

                      tw2005, thanks! That really goes and above the call of duty. I'll go back
                      in when my daughter gives me second.

                      Thanks a lot for the drawing!!!

                      Nicholas
                      If we had a clear close up of yours without the IC in place that would be handy to see what's under the IC. If it's just pin 1 then I'm confident about what I have but pins 3 & 5 not so sure. had to rely on the schematic to have a bit of a guess as that photo is not clear enough.

                      Comment

                      • sordids999
                        Badcaps Legend
                        • May 2013
                        • 2149
                        • uk

                        #31
                        Re: Panasonic 50" power supply, no standby +5V

                        I think I have a old board somewhere ill try and post pics later

                        Comment

                        • Nicholas
                          Senior Member
                          • Dec 2014
                          • 60
                          • Kingdom of Denmark

                          #32
                          Re: Panasonic 50" power supply, no standby +5V

                          Hi guys, a managed to solder on the wire to pin 1 on the IC, and the TV works!

                          Thanks for all your help, especially tw2005's drawing!

                          So, another thumbs up for the U203-solution!

                          On a side note, what is the resolution of this TV? It says 720p on many sites,
                          but that seems low for a TV from 2012? I would expect 1080p.

                          Thanks again!

                          Comment

                          • drussell
                            Senior Member
                            • Nov 2014
                            • 144
                            • Canada

                            #33
                            Re: Panasonic 50" power supply, no standby +5V

                            1024x768

                            Comment

                            • Nicholas
                              Senior Member
                              • Dec 2014
                              • 60
                              • Kingdom of Denmark

                              #34
                              Re: Panasonic 50" power supply, no standby +5V

                              Damn, not even 1280 pixels per line...

                              Comment

                              • tw2005
                                Badcaps Legend
                                • Oct 2011
                                • 6458
                                • Australia

                                #35
                                Re: Panasonic 50" power supply, no standby +5V

                                Originally posted by Nicholas
                                Hi guys, a managed to solder on the wire to pin 1 on the IC, and the TV works!

                                Thanks for all your help, especially tw2005's drawing!

                                So, another thumbs up for the U203-solution!

                                On a side note, what is the resolution of this TV? It says 720p on many sites,
                                but that seems low for a TV from 2012? I would expect 1080p.

                                Thanks again!
                                cheap and worth the effort. Shame we got no photos though.

                                Comment

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