Thomson 26HS4246C

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  • pyrosster
    Member
    • Aug 2013
    • 43
    • Spain

    #1

    Thomson 26HS4246C

    Hello all!

    I have a THOMSON 26HS4246C that wont power on. No standby LED, nothing.
    This TV have a separate 24V power supply that's working correctly.

    Inside the TV I found a damaged diode with the reference AB which seems a (SILICON 28V HYPERABRUPT VARACTOR DIODE).

    Could I use another replacement for this diode?

    Any help is appreciated!
    Attached Files
    Last edited by pyrosster; 10-21-2014, 05:13 AM.
  • pyrosster
    Member
    • Aug 2013
    • 43
    • Spain

    #2
    Re: Thomson 26HS4246C

    bump!

    Comment

    • kasfamily
      Badcaps Veteran
      • Aug 2014
      • 765
      • Russia

      #3
      Re: Thomson 26HS4246C

      in pdf MP1593D this diode B340A

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #4
        Re: Thomson 26HS4246C

        Did some one work on this TV before? The connector is broken and then the female is not inserted correctly to line up with pin of the connector.
        Does the diode test bad?
        Attached Files
        Never stop learning
        Basic LCD TV and Monitor troubleshooting guides.
        http://www.badcaps.net/forum/showthr...956#post305956

        Voltage Regulator (LDO) testing:
        http://www.badcaps.net/forum/showthr...999#post300999

        Inverter testing using old CFL:
        http://www.badcaps.net/forum/showthr...er+testing+cfl

        Tear down pictures : Hit the ">" Show Albums and stories" on the left side
        http://s807.photobucket.com/user/budm/library/

        TV Factory reset codes listing:
        http://www.badcaps.net/forum/showthread.php?t=24809

        Comment

        • pyrosster
          Member
          • Aug 2013
          • 43
          • Spain

          #5
          Re: Thomson 26HS4246C

          kasfamily,

          Thank you very much! Do you have service manual/schematic for this model?

          budm,

          Thank you very much! Nobody worked on this TV before. I disconected the board to look the voltage legends below the board and take photos, then I connected the board again without inserting correctly the connector but only to take photos again of the whole tv.

          I checked the diode and using resistance check the diode gave me 0.002 and 0.004 in opposite direction. Then I checked the other diode on the same board and gave me 1.09 and 1.19.

          This is normal?

          Comment

          • budm
            Badcaps Legend
            • Feb 2010
            • 40746
            • USA

            #6
            Re: Thomson 26HS4246C

            Best to test the Diode off the board. That diode is part of the switching power supply circuit.
            Never stop learning
            Basic LCD TV and Monitor troubleshooting guides.
            http://www.badcaps.net/forum/showthr...956#post305956

            Voltage Regulator (LDO) testing:
            http://www.badcaps.net/forum/showthr...999#post300999

            Inverter testing using old CFL:
            http://www.badcaps.net/forum/showthr...er+testing+cfl

            Tear down pictures : Hit the ">" Show Albums and stories" on the left side
            http://s807.photobucket.com/user/budm/library/

            TV Factory reset codes listing:
            http://www.badcaps.net/forum/showthread.php?t=24809

            Comment

            • kasfamily
              Badcaps Veteran
              • Aug 2014
              • 765
              • Russia

              #7
              Re: Thomson 26HS4246C

              only this
              Attached Files

              Comment

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