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sony pcg-51412M schematics needed

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    sony pcg-51412M schematics needed

    Unit is totally dead. No input/supply voltage at U98. No 3v and 5vdc were measurable. 19.5vdc is only present at u119 and u121 so far...

    Infos at board:

    Mbx-229
    09941-1M
    Cadiz CP MB
    48 4JH01 01M


    Thanks...

    #2
    Re: sony pcg-51412M schematics needed

    Attached Files
    Last edited by Vesko356; 06-26-2023, 01:25 PM. Reason: Schematic attached to the post. External url removed.

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      #3
      Re: sony pcg-51412M schematics needed

      At U119 pin123=19.3v, pin4=19.3v, pin5678=0. Btw, what should be the supply voltage at pin4? Tried already replacing U119 but with same result...

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        #4
        Re: sony pcg-51412M schematics needed

        Measure the voltages on pins 4, 5, 13, 8, 10, 11, 27, 14, 28 of U121

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          #5
          Re: sony pcg-51412M schematics needed

          U119 got now an output and at pin4=13.58vdc, U119 gives an output after a mild reheat on U140. But it doesn't have 3.3v and 5vdc. Replaced already u98...

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            #6
            Re: sony pcg-51412M schematics needed

            hello, does anyone have the boardviewer schematic of this motherboard? I can not find

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