external hd Seagate, broken down the +12 volt and USB 3.0 SATA board

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  • gabri2211
    Member
    • Nov 2016
    • 18
    • Italy
    #1

    external hd Seagate, broken down the +12 volt and USB 3.0 SATA board

    Hi to all 😎
    I'm looking for any useful information to repair this interface (I have attached the image).
    On this board I read E3215-1215A_4D.
    This is the small plate inside the HD enclosure that allows to connect a 12 volt power supply, interface the disk with a USB 3.0 socket and is connected to the HD with the SATA connector.

    If any of you have found a burnt or short-circuited component in a circuit like mine​, if you have useful diagrams for the repair, or even better a description for the tests at the test points, I would be very grateful.
    in particular I couldn't find the data sheets for the 3-pin mosfets (I think) like sot23 markeds x7fv/34 and w1a/26.
    the AIC2857F,Step-Down Converter ic seems to work well.
    I can't find any information about the ic INITIO inic-3609pn a416 E52262A14.


    If I connect the hd to its normal external power (12 volt dc) the hd seems dead. If I connect the HD's USB 3.0 port via a self-powered USB 3.0 multiplex, the HD starts working perfectly again.
    This means that only the 12 volt power supply of this board is at fault.

    Any advice, except that of keeping the HD with the self-powered multiple socket, is welcome 😁
    Thanks in advance to anyone who will help me. 🀩
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