Optoma Hd146x with bad powersupply

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  • debruina
    Member
    • May 2020
    • 29
    • Nederland
    #1

    Optoma Hd146x with bad powersupply

    Hi
    I am repairing a Optoma HD beamer with a bad powersupply. It has a blown 6.3A fuse and a burned coil in the mains line.
    Any ideas where to get a filter like that? I am little surprised that the mains is directly connected to both lines on the coil. One wire has a bit of more isolation (light color) but still both mainlines are really close together like this. It seems to me this is asking for trouble. I mean i have seen them with seperate sides but never like this. Maybe rewire? Any advice?
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    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 31015
      • Albion
      #2
      Re: Optoma Hd146x with bad powersupply

      its a filter, you can replace it with a couple of jump wires to test the psu
      and you should because something feels wrong about that filter burning unless too much current went through it

        Comment

        • CapLeaker
          Leaking Member
          • Dec 2014
          • 8146
          • Canada
          #3
          Re: Optoma Hd146x with bad powersupply

          Just unwind it a half of a turn and solder it back on. Done. A half of a winding or even a whole turn doesn’t matter much. I try to cut only that much than I really have to. Just make sure that not more isn’t wrong with the PSU like a shorted mosfet in the primary.

            Comment

            • debruina
              Member
              • May 2020
              • 29
              • Nederland
              #4
              Re: Optoma Hd146x with bad powersupply

              Replaced the filter with two wires and it works again.

              Luckily nothing else damaged. I guess the wire may have been damaged at production.

                Comment

                • CapLeaker
                  Leaking Member
                  • Dec 2014
                  • 8146
                  • Canada
                  #5
                  Re: Optoma Hd146x with bad powersupply

                  A lighting strike nearby can do that. I’ve seen this a few times. For me I would just have unwound a half of a turn or a whole turn and stuck that filter back in its place.

                    Comment

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