s0urceror

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  • January 1, 2023 at 8:14 PM in reply to: Accidentally plugged in to a 12v adapter, won’t boot #56194
    s0urceror
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      Thx Morpheus for your reply and highlighting the corresponding traces.

      I checked the schematics already and figured out that indeed IOVDD is connected everywhere. Was hoping there was a likely culprit. The 12v probably triggered an over-voltage behind U5 which led to a short somewhere. ICs usually just fail without creating a short. Filtering caps usually just survive unless they are of the tantalum kind which short. Do we have tantalums anywhere on the board?

      Anyway, I’ll keep checking, thx.

      Btw. I got myself already a new OSSC but want to revive this one as well. One cannot have too many retro video converters 😉

      December 28, 2022 at 10:38 AM in reply to: Accidentally plugged in to a 12v adapter, won’t boot #56165
      s0urceror
      Participant

        Hi, similar thing happened to me. I am now trying to repair. I have OSSC v1.6

        U6 is good. U5 was fried. But behind U5 there is a short between IOVDD and GND as well. I removed all input caps and regulators U7,U9, U12,U13,U14, U15,U16. Still a short between IOVDD and GND.

        What could still be causing this. Do I have to start pulling the bigger ICs? What do you think is the main culprit?

        Let me know.

        • This reply was modified 2 years, 6 months ago by s0urceror.
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