Color issue

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  • July 29, 2018 at 7:28 PM #22649
    LaMangouste
    Participant

      Hello,

      I hope some specialists can give me some hints about how to track the issues.

      I built 2 unit: one is working perfectly, while the other have some issues. There is a color issue that is visible on the test pattern, vertical lines have weird colour, odd one are purple, even are a bit yellow.
      test pattern

      Also the compatibility with multiplication modes is limited with that unit compared to the other one. Ex: 480i passthrough not working with that unit. And it works with the other one on same TV. Same with 240pX3.

      Do you know where should I look? I don’t see any visible solder bridge.

      Thank you

      July 29, 2018 at 10:07 PM #22653
      BuckoA51
      Keymaster

        Possibly a faulty HDMI decoder chip just a wild guess.

        July 30, 2018 at 9:48 AM #22654
        marqs
        Participant

          The color issue looks like you have a floating pin(s) on the color data bus between FPGA and HDMI TX (B[4] perhaps). If some modes are not working on that specific board, it may be a sign of other weakly connected HDMI TX pins as well.

          July 30, 2018 at 1:03 PM #22655
          LaMangouste
          Participant

            Thank you both.
            I’ll try to rework the soldering for the pins mentioned.

            I’ll keep you updated.

            August 1, 2018 at 10:19 PM #22678
            LaMangouste
            Participant

              Thanks again marqs, you were right. Both issues are solved now.

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