Zener T3D98 data required

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  • spdy
    Member
    • May 2018
    • 26
    • india

    #1

    Zener T3D98 data required

    I am trying to repair a Panasonic plasma 42 inch TV TH-P42C10D. one of the suspicious components is a Zener T3D98 which is showing infinite resistance on both sides using a diode check with a multimeter.

    I cannot find any data on this. I presume this is a high voltage 100, 150 or 200 volts zener in the power supply after the bridge rectifier and parallel to the transformer input.

    How can I get data on this and can it be checked with a DMM?

    Thanks.
  • chrismurphy
    Badcaps Veteran
    • May 2014
    • 251
    • australia

    #2
    Re: Zener T3D98 data required

    Very unlikely a zener or diode will go open
    Check again on diode setting on your multimeter

    Comment

    • spdy
      Member
      • May 2018
      • 26
      • india

      #3
      Re: Zener T3D98 data required

      Thanks. I have desoldered and checked it is open on both sides. I want to know if they have higher threshold voltage and therefore it does not show on the dmm I am using.
      I would also like to know what should be the voltage of a zener being used accross the bridge rectifier and trasnsformer of the smps?

      Comment

      • R_J
        Badcaps Legend
        • Jun 2012
        • 9535
        • Canada

        #4
        Re: Zener T3D98 data required

        That T3D98 has two diodes connected common anode, one is a zener one is a regular diode. It will measure open circuit

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA

          #5
          Re: Zener T3D98 data required

          Originally posted by r_j
          that t3d98 has two diodes connected common anode, one is a zener one is a regular diode. It will measure open circuit
          +1
          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

          • petehall347
            Badcaps Legend
            • Jan 2015
            • 4426
            • United Kingdom

            #6
            Re: Zener T3D98 data required

            example .....

            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA

              #7
              Re: Zener T3D98 data required

              The questions are:
              1) What is not working?
              2) What power supply section that this snubber diode is located in?
              3) Pictures of what we are dealing with?
              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

              • spdy
                Member
                • May 2018
                • 26
                • india

                #8
                Re: Zener T3D98 data required

                Thanks, that is why it is showing open on the dmm diode check. I will have to look at the power supply section of this tv again.

                Comment

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