Color issue

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  • #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

    #22653
    BuckoA51
    Keymaster

    Possibly a faulty HDMI decoder chip just a wild guess.

    #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.

    #22655
    LaMangouste
    Participant

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

    I’ll keep you updated.

    #22678
    LaMangouste
    Participant

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

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