LG 50PS3000 Faulty ZSUS EAX 55361501

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  • NipZ
    Senior Member
    • Jul 2013
    • 106
    • UK
    #1

    LG 50PS3000 Faulty ZSUS EAX 55361501

    I purchased an LG 50PS3000 as faulty off a Polish guy in hope to learn more about fixing TV's. The TV has sound but no picture. When I removed the back I was disappointed to find someone had already investigated the fault, found a blown fuse on the ZSUS and soldered a wire across it.

    If I check continuity across Fast Recovery Diode(RF2001 T3D) I get continuity across every pin combination and also again with the Mosfets(45F122). I removed the Fast Recovery Diode to test and it appeared ok, I'm assuming the same with the Mosfets.

    Does this issue point to something else on the board being shorted causing the problems?

    I have seen repair kits for this board, but they state they are for poor picture quality and red sparkles, I'm not sure they will fix my issue.
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    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK
      #2
      Re: LG 50PS3000 Faulty ZSUS EAX 55361501

      Poor picture quality with purple/red tint can be caused by faulty Z-sustain. Do the repair kits include those parts? Maybe they are for the ones which blow the fuses which aren't jumpered over.
      Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
      For service manual, schematic, boardview (board view), datasheet, cad - use our search.

        Comment

        • NipZ
          Senior Member
          • Jul 2013
          • 106
          • UK
          #3
          Re: LG 50PS3000 Faulty ZSUS EAX 55361501

          The guy is selling 2 kits, 24 piece and 16 piece kits, but no mention of Fast Recovery Diodes. He does mention 6x 45F122 , 4 resistors and a Zener Diode.
          I think my next step will be to take the mosfets out and test them.

          Thanks

            Comment

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