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Pixel Colour Bleeding

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This topic contains 10 replies, has 3 voices, and was last updated by  Milsancho 1 month ago.

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  • #15795

    jonlad
    Participant

    This is kind of related to the OSSC but here goes…

    I have a super famicom with a CSYNC RGB retrogaming scart cable, playing through a 26″ sony triniton crt.

    I see quite a bit of colour “bleeding”, mostly on the reds

    Can anyone tell me if this is the SNES, the cable or my display? Will I see this on the OSSC (when mine arrives :p)?

    Cheers

    • This topic was modified 1 month, 2 weeks ago by  jonlad.
    • This topic was modified 1 month, 2 weeks ago by  jonlad.
    • This topic was modified 1 month, 2 weeks ago by  jonlad.
    • This topic was modified 1 month, 2 weeks ago by  jonlad.
    #15804

    BuckoA51
    Keymaster

    Difficult to say… what kind of SNES is it? (2-chip/1-chip)? Do other systems have colour bleed on that TV or only your SNES?

    #15817

    jonlad
    Participant

    Unsure as to type of SNES, but after looking for it, I can actually see the bleeding on my jap mega drive too.

    I’ll try to eliminate parts of the chain (have a Shinybow scart>component convertor and a powered bandbridge scart switcher also)

    #15837

    BuckoA51
    Keymaster

    Do you have access to a flashcart on either SNES or Megadrive?

    #15848

    jonlad
    Participant

    Yes to both

    I tried bypassing the scart switcher and still saw the bleeding so thats one component we can cross off

    • This reply was modified 1 month, 2 weeks ago by  jonlad.
    #15857

    BuckoA51
    Keymaster

    Can you try the colour bleed test in the 240p test suite?

    #15871

    jonlad
    Participant

    Will do.

    I have that on the MD though didn’t know about the colour bleed test

    #15890

    jonlad
    Participant

    1

    • This reply was modified 1 month, 1 week ago by  jonlad.
    #15903

    BuckoA51
    Keymaster

    Red does look a little over-saturated, blue too You may need to look how to adjust convergence on your set. How to do this varies between sets so check around. If you do decide to open your CRT, always exercise caution as it contains very high voltage components that keep their charge even after the set has been powered off.

    #15923

    jonlad
    Participant

    Saturation might be the exposure from my phone camera

    I can get into the service menu on my TV (Sony trintron) but I’m not sure what setting I’d need to change to adjust the bleeding

    Opening up the set is a little above my pay grade I’m afraid

    #16166

    Milsancho
    Participant

    You’re not saying which Trinitron model, but anyways, try to find the “HWD RED”, “HWD GREEN”, “HWD BLUE” options; they’re usually together with geometry options, though I’m not sure on NTSC models. Lower the RED value a bit and check it out. Over-driven colors (together with the focus) will normally need adjustments only possible by opening up the set, but you may alleviate a bit the problem with the service menu options.

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