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Can this smarphone works without a (possible) protection diode?

Discussion in 'Troubleshooting and Repair' started by develnick, Oct 15, 2018.

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  1. develnick


    Oct 15, 2018
    While I was replacing the battery, I detached a component with my fingernail. Which component is it?
    Someone said this is a protection diode.

    Device name: Xiaomi Redmi5 plus
    You can see the missing component in the small orange circle.

    Xiaomi Schematics:

    Original PCB board:


    Detached-Component PCB board:

  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    Yes, it just looks like a regular diode.

    If find something in the same package that can handle (say) 1A.

    Fortunately the image of the intact board is good enough to see the markings which indicate the cathode.
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