Grounds on RGB SCART cables and CRT TV

Discussion in 'General Gaming' started by helakustorm, Feb 13, 2018.

  1. helakustorm

    helakustorm Robust Member

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    Hello,

    I saw that the majority of the RGB SCART cables sold on the market have all the grounds wired; one big example is RGC cables.
    I have tested continuity with my multimeter and inside the consoles and inside the CRT TV the grounds are wired/soldered together.
    So, what is the logic behind this because from my point of view you can connect one single ground that go from the console connector to the SCART connector.

    Thanks!

    P.S. for the moment I have tested only the GameCube PAL, PlayStation 1/2 PAL slim editions.
     
  2. Bad_Ad84

    Bad_Ad84 The Tick

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    Connect them all to guarantee it will work on all Tvs.

    Too many connected has no downside. Not having ones required would mean it didn't work.
     
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  3. helakustorm

    helakustorm Robust Member

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    From what you are saying Bad_Ad84 I understand that some CRT TV's doesn't have the SCART grounds soldered together inside?
    This is used more for compatibility on CRT TV side not console side?
    I was thinking that grounds in general are the same for all the pins inside CRT TV's and consoles.

    Thanks!
     
  4. rama

    rama Gutsy Member

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    Technically, the different ground pins each have their own purpose.
    Most TVs have them all connected together right at the PCB, but there are devices that don't do it (some upscalers, for example, or self made adapters).
    If you only connect one or two grounds, you risk an incompatibility or degraded picture / sound.
     
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  5. helakustorm

    helakustorm Robust Member

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    What about my case rama?
    I can connect only one ground, correct? Because internally they are connected inside the TV inside the consoles.
     
  6. AtomizerZero

    AtomizerZero Intrepid Member

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  7. helakustorm

    helakustorm Robust Member

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    If I'm not mistaken, inside the official GameCube RGB cable (SCART end) only one ground is soldered.

    Thank you everyone for the explanations.

    By the way, this is only for my information but does anyone knows if all the consoles that support RGB share the same grounds?

    P.S. "too many connected has no downside" but if you have to solder each one of them and if you have a soldering iron like mine you call demons and summon the evil himself :D
     
  8. rama

    rama Gutsy Member

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    You can link grounds with tiny, short wires. At least do the RGB, sync and audio ground pins.
     
  9. AtomizerZero

    AtomizerZero Intrepid Member

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    Make a cable with legs coming off it first, then you can just solder those legs to the pins. Makes it super simple.
    A cable like this > ¬¬¬¬
     
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