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    #1

    Need Power Supply diagram

    A customer does not want to repair this LCD set - Sansui SV3050LCD, because of a major power supply fault, and because the agent does not has the complete item in stock [said it is obsolete].
    The power needs substantial repair, but I have no diagram.
    The set is oldish, and maybe I will not be able to get the original parts.
    Anybody here with that set's PS wiring?
    Tags: None
    #2
    Re: Need Power Supply diagram

    Does it mean I have no luck here?
    Any suggestions where I can get that Power Supply diagram?

    Comment

      #3
      Re: Need Power Supply diagram

      You aren't likely to find a diagram. LCD power supplies aren't too complicated, please post a description of the problem and we'll try to help you fix it.

      Some clear, focused pictures of both sides of the board, resized as close to 2000x2000 as possible and uploaded using the manage attachments function would help greatly as well.
      Originally posted by PeteS in CA
      Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
      A working TV? How boring!

      Comment

        #4
        Re: Need Power Supply diagram

        If you can manage to know the Vout, just change it with 3rd party one

        Comment

          #5
          Re: Need Power Supply diagram

          These are the transistors for the power supply I need to repair [for the above LCD set], but I have not found any reference to them in my books. Don't even know if they're transistors - look more like ics or regulators, I don't know. All are stuffed up [short-circuited].
          Attached Files

          Comment

            #6
            Re: Need Power Supply diagram

            First photo- devices are dual diode packs:

            Fairchild FYPF2010DNTU
            STMicroelectronics STPR1020CFP

            Second Photo- devices are mosfets:

            Fairchild FQPF9N50C

            Comment

              #7
              Re: Need Power Supply diagram

              The third one in the first pic is a 10 amp 200 volt ultrafast rectifier. Here.

              The ones in the second pic - 500v, 9A, 0.85 ohm N-Channel mosfets. Here. That was easy. The two transistors in the first pic are going to take a bit of logic to figure out, i'll be back in a few minutes.

              Edit: jetadm123 was in before me. The FYPF2010 are 20A 100v dual Schottky diodes not transistors.
              Originally posted by PeteS in CA
              Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
              A working TV? How boring!

              Comment

                #8
                Re: Need Power Supply diagram

                Thanks very much, guy!
                Much appreciated help.
                Now, the problem is going to get them, because it appears Sansui does not stock them [here in Johannesburg].
                I would prefer to replace the PS board, but supplier [Sansui] informed that it is obsolete.
                The customer is no longer interested in repairing this unit, and has - in fact - already bought another set.
                Either I fix it or throw it away.
                [I would like to repair it to use as a monitor for other jobs.]
                What do you suggest?


                ...
                Last edited by burntfingers; 05-06-2011, 12:05 AM. Reason: Not Sanyo: Sansui, sorry

                Comment

                  #9
                  Re: Need Power Supply diagram

                  First step would be putting your location info in your profile. Second step would be to order from Digikey/Mouser/Farnell, whoever is more convenient to you. You'll find several equivalents on all three stores i mentioned.
                  Originally posted by PeteS in CA
                  Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
                  A working TV? How boring!

                  Comment

                    #10
                    Re: Need Power Supply diagram

                    Thanks again, guys.

                    Comment

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