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820-00840-A Part Identification

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  • 820-00840-A Part Identification

    Hey all :-)

    Have an 820-00840-A with some liquid damage. There a rather large hole in the board which connects to a part thats not listed on any schematic I can find?

    Looks to be PI3USB32224BXEAE , can't find pinouts so not sure where to run trace wire.

    Pics attach and help appreciated!
    Attached Files

  • #2
    https://es.aliexpress.com/item/40001...chweb201603_52

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    • #3
      Thanks mate

      Found that part but not pinout or explanation of function. A bit more searching and https://www.diodes.com/assets/Datash...I3USB32212.pdf is the closest thing I've found so far with chip info, so USB 3.1 Mux/Demux (looks like more pins on short ends..).

      As its a 2 Thunderbolt model I'm guessing that burned pin is a fair place to start.

      Hoping someone can identify that pin connected to the burned pad so I can run a trace wire.



      Last edited by MLS; 09-12-2019, 06:53 AM.

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      • #4
        Mouser has the part listed (new from supplier) but no info. https://au.mouser.com/ProductDetail/...8T79trwA%3D%3D

        Part is not on available schematics.

        If anyone has the ability to name the broken/burned line in the above Pics so I can run a trace, that would be an amazing help :-)

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        • #5
          Get a scrap board with that area in good shape.
          Remove the f**g USB redriver chip and also CD3215 chips.
          Then check continuity between redriver, CD3215 and USB connector pins...

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