Sansui SV-PD403

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  • burntfingers
    Senior Member
    • Jan 2011
    • 148

    #1

    Sansui SV-PD403

    Set does not turn on.
    When pressed, Standby light flashes blue some six or seven times and returns to yellow.
    Nothing else happens.
    Checked for dry joints, bad caps, plugs, visually there's nothing wrong.
    Can't find the diagram, also.
    Y and X boards look good.
    Tried to unplug some power plugs, nothing.
    Have you had this set here before?
    Attached Files
  • ReeceyBurger123
    Never Give Up !
    • May 2014
    • 7325
    • Britain

    #2
    Re: Sansui SV-PD403

    Checked all fuses on Psu ?
    Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

    https://www.facebook.com/Telford-Tel...7894576335359/

    Comment

    • burntfingers
      Senior Member
      • Jan 2011
      • 148

      #3
      Re: Sansui SV-PD403

      Only found two, OK - one in the mains entrance and another round one on the PS.
      Are there more?
      Something is not helping the two mains relays [for AC] to close and "fire" the set.
      Last edited by burntfingers; 12-22-2015, 08:39 AM.

      Comment

      • ReeceyBurger123
        Never Give Up !
        • May 2014
        • 7325
        • Britain

        #4
        Re: Sansui SV-PD403

        Ok, need close up images of the Psu.
        Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

        https://www.facebook.com/Telford-Tel...7894576335359/

        Comment

        • burntfingers
          Senior Member
          • Jan 2011
          • 148

          #5
          Re: Sansui SV-PD403

          OK, here are three new pictures of Power Supply board - one taken on its length, the other two half of its height each.
          Attached Files

          Comment

          • ReeceyBurger123
            Never Give Up !
            • May 2014
            • 7325
            • Britain

            #6
            Re: Sansui SV-PD403

            Ok right do you get Vs & Va voltages when you try to turn the Tv on ?
            Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

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            • burntfingers
              Senior Member
              • Jan 2011
              • 148

              #7
              Re: Sansui SV-PD403

              They both read zero volts at switching on.
              I only get one of the 5 volts, nothing else.

              Comment

              • ReeceyBurger123
                Never Give Up !
                • May 2014
                • 7325
                • Britain

                #8
                Re: Sansui SV-PD403

                Right ok, do you know how to check resistors ?
                Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

                https://www.facebook.com/Telford-Tel...7894576335359/

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                • burntfingers
                  Senior Member
                  • Jan 2011
                  • 148

                  #9
                  Re: Sansui SV-PD403

                  I do, and already checked the high wattage ones, they are OK.
                  Didn't find any fuse ones, couldn't find any.
                  The power can only come on after the two relays are activated.
                  Could I bridge them to see if I get power?...

                  Comment

                  • burntfingers
                    Senior Member
                    • Jan 2011
                    • 148

                    #10
                    Re: Sansui SV-PD403

                    I've been looking for the service diagram, but so far no luck.
                    Does anybody have it?

                    Comment

                    • fzabkar
                      Badcaps Veteran
                      • Mar 2009
                      • 772
                      • Australia

                      #11
                      Re: Sansui SV-PD403

                      Here is a [blurry] PSU circuit diagram from a Konka PW-1450:


                      Perhaps the flash codes will be similar to those of other Konka plasmas.
                      Last edited by fzabkar; 12-23-2015, 01:29 PM.

                      Comment

                      • burntfingers
                        Senior Member
                        • Jan 2011
                        • 148

                        #12
                        Re: Sansui SV-PD403

                        Thank you.
                        This youtube video suggests it could be a thermal fuse under the switch mode power transformer.
                        Going to investigate it.
                        [Diagram, unfortunately, not clear enough to read values]|


                        https://www.youtube.com/watch?v=qQ_iLxx3Fj4

                        Comment

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