Arnopesto

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  • May 29, 2025 at 10:51 AM in reply to: Overvolted OSSC 1.6 has no input nor output [updated] #66143
    Arnopesto
    Participant

      Well, I finally removed the U8 chip and… nothing changed. And I ripped some U8’s pads in the process 🙄
      I think I can now consider this unit as dead.

      On the bright side, it did not cost me much, and I learned about electronics troubleshooting so, yay (I guess ?)

      Thanks for the help anyway, have a nice day everyone !

      April 26, 2025 at 9:50 AM in reply to: Overvolted OSSC 1.6 has no input nor output [updated] #65835
      Arnopesto
      Participant

        Hi ! Thanks for your answer !

        Sadly I don’t have an oscilloscope, but I think my multimeter can measure Hz (I don’t know to which extent, and if it can help)

        About the C18 capacitor… The more I think about it, the more I’m convinced it was fine.
        I guess this is a low resistance line so my multimeter was beeping as a false positive. When I measure the actual resistance of the line, I get about 6 ohms IIRC (whereas I get about 0.05 ohms on ground).
        Initially I thought it was faulty because it was heating, but I realize now that the heat probably comes from U1 (which is really hot). I was impatient, I should have tested to feed 3.3V to the line before removing it.
        So, let’s consider it wasn’t shorted for now. (And I can’t test it because I have no idea where I put it, it vaporized lol)

        Anyway, removing U8 may be the next step you’re right. And if it doesn’t work I guess I will send it to repair. Do you have an idea how much it will cost ? 40$ is the initial price and I’m fine with it but if the bill increases it may not be worth it

        Thanks again for the advises. I think I will test this next week !

        Stay tuned 😛

        • This reply was modified 3 months ago by Arnopesto. Reason: Add info about C18
        April 25, 2025 at 11:03 AM in reply to: Overvolted OSSC 1.6 has no input nor output [updated] #65826
        Arnopesto
        Participant

          So, Update !
          I found the 1.6 pcb schematics, it helped me follow the 3.3V line.
          So I sat down a little more and by testing, I thought the C18 capacitor was shorted
          After removing it and feeding (temporarly) U5 into U6 (which was previously removed) I can get the OSSC to boot and display the usual menu on the LCD.

          BUT, I get no HDMI output (not even the test pattern), and even if I plug any cable, SCART RGB or Component, the OSCC still displays “NO SYNC”

          So maybe U1 and/or U3 is definitively fried, or maybe there is another faulty capacitor / voltage regulator ? Or maybe somehow the whole board is cooked ? x)

          Other regulators seems to output the right voltage.
          Could it be a shorted clock or sync line, something like that ? It may explain the sync problem for the input and output ? How could I debug this ?

          Stay tuned

          • This reply was modified 3 months ago by Arnopesto. Reason: More infos and questions lul
          April 23, 2025 at 12:02 AM in reply to: Overvolted OSSC 1.6 has no input nor output [updated] #65801
          Arnopesto
          Participant

            Hi again !

            Unless someone has an idea/advice in the next days I guess I will send it to the repair service soon

            I got the order number now, is it enough for sending it to repair ? I don’t have the bill as I bought it secondhand

            It’s a 5-digit number, is that correct ?

            Thank you ! <3

            • This reply was modified 3 months ago by Arnopesto. Reason: added a question about order number
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