LG50PC1D Plasma PSU Power up procedure.

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  • nogger
    Senior Member
    • Aug 2010
    • 190
    #1

    LG50PC1D Plasma PSU Power up procedure.

    Hi all
    Just wondered if anyone had the procedure for bench testing this PSU for bringing up the output voltages in the correct sequence.

    Procedure i have used so far is:

    I get 5.3v standby & 4.8v on the AC detect pin.
    Linking the Stby volts to RELAY ON i get all the secondary voltages (except 3.3 & Va/Vs) Again linking Stdby volts to the 3.3v_ON i get the 3.3v, so far so good.
    Next i linked the Stby volts to the M5V_ON i get the 5 volts.

    If i now link VS_ON to 5volts Va & Vs momentarily kick in before the relay drops out so not sure if i am testing in the correct sequence or if i have a VS/VA fault.

    The original complaint from the owner wasjust set would come on but takingb longer &longer whichi attributed to the failing output caps.

    Graham
    Tags: None
    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK
      #2
      Re: LG50PC1D Plasma PSU Power up procedure.

      On these supplies Vs needs to be loaded or it will go up to about 220V then shut down due to over-voltage protect. A 60W or 100W, 230V light bulb works well.
      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

        • nogger
          Senior Member
          • Aug 2010
          • 190
          #3
          Re: LG50PC1D Plasma PSU Power up procedure.

          Thanks Tom,thats exactly the kind of info that i was looking for. I will give it a bash now & report back.

            Comment

            • nogger
              Senior Member
              • Aug 2010
              • 190
              #4
              Re: LG50PC1D Plasma PSU Power up procedure.

              Tom that's spot on, works a treat.

              Thanks for your help

              Graham

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