hitachi L42S02A

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  • willyam1
    Senior Member
    • Feb 2012
    • 112
    • israel
    #1

    hitachi L42S02A

    HI.
    problem is sound ok no backlight.
    inverter 6632L-0503B.
    24VOK.
    FROM MAIN BOARD- 3.3V OK INV/ON 3.1V OK .
    4 FET NOT SHORT SMD FUSE OK.
    INV IC CONTROLLER OZ9966SN.
    Icheck all resi diode and tra smd all ok.
    any schematic to this inv or anyone already repear this inv any data to this ic.
    i change 3 capi 680/35 but no cure.
    thanks willyam1
    Tags: None
    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK
      #2
      Re: hitachi L42S02A

      Does LED light on inverter?
      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

        • willyam1
          Senior Member
          • Feb 2012
          • 112
          • israel
          #3
          Re: hitachi L42S02A

          no i dont see any led.
          willyam.
          i notice that the vcc pin8 in the comperator 2903 is missing i will check were is the suooly to that pin.
          willyam
          Last edited by willyam1; 11-06-2013, 04:09 AM.

            Comment

            • willyam1
              Senior Member
              • Feb 2012
              • 112
              • israel
              #4
              Re: hitachi L42S02A

              need schematic.
              willyam

                Comment

                • tom66
                  EVs Rule
                  • Apr 2011
                  • 32560
                  • UK
                  #5
                  Re: hitachi L42S02A

                  No schematics for LG inverters exist AFAIK, apart from the ones which have been reverse engineered. However, if you don't even get the thing attempting to light the bulbs, I'd look towards the main controller chip being bad, or one of its supply voltages being low.
                  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

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