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SONY MBX-266 Z50CR MB S1202 4RM02 board repair

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    SONY MBX-266 Z50CR MB S1202 4RM02 board repair

    SONY MBX-266 Z50CR MB S1202-2 48-RM02 021 board repair
    is possible or not.

    Pu4103 ,RT8223M IC is burnt in such a way that a gap is created between motherboard sides like a hole lol

    PIN 16,17,18 of this ICs are damaged and on the other side there are capacitors closed by to the damaged pad.

    Need help or suggest is this board repairable or not if we replace IC
    and if yes then how?
    https://datasheetspdf.com/datasheet/RT8223M.html

    Schematic - https://www.badcaps.net/forum/showth...t=39080&page=2

    Any suggestions

    .
    Attached Files
    Last edited by SMDFlea; 10-26-2020, 06:57 AM.

    #2
    Re: SONY MBX-266 Z50CR MB S1202 4RM02 board repair

    Find a BV, it'll be difficult to verify repairs if you dont have it. In principle yes, this is salvageable. You'll need a dremel, bakelite or another material to cover the hole that's sufficiently heat resistant, UV mask and lamp to create flat work surface, jumper wires to recover the traces, and all of this has to be done under microscope. I've seen people do it however.

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      #3
      Re: SONY MBX-266 Z50CR MB S1202 4RM02 board repair

      Here watch this: https://www.youtube.com/watch?v=h4HNEWdvv8c. It's a silent video, you dont need to know russian
      Last edited by emestee; 10-25-2020, 08:58 AM. Reason: remember no russian

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        #4
        Re: SONY MBX-266 Z50CR MB S1202 4RM02 board repair

        Originally posted by emestee View Post
        Here watch this: https://www.youtube.com/watch?v=h4HNEWdvv8c. It's a silent video, you dont need to know russian
        Thank You.

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          #5
          Re: SONY MBX-266 Z50CR MB S1202 4RM02 board repair

          BV not available freely. Remove the IC and 4 mosfets connected to this IC and then check impedance on both the coils. If impedance is good , then it makes sense to try else you need to findout what else is wrong. If layer beneath the surface is damaged, may not be repairable.

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