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Mega Drive I Scart RGB Calbe

Discussion in 'General Tech Help & CD Burning Help' started by sheep64, Feb 6, 2002.

  1. sheep64

    sheep64 New Member

    Hi there,

    I got an old Mega Drive I from eBay. I only came with a RF Cable and I want to connect it to my TV via RGB like my Mega Drive 2.

    How must I connect the Mega Drive to the TV?

    My problem is, where on the Scart connector do I have to connect the Sync from the Mega Drive.

    And where must I connect the +5V from Mega Drive to switch the TV into RGB Mode? (is that blanking signal???)

    I found a scart and Mega Drive pinout at www.hardwarebook.net
  2. IceDigger

    IceDigger Founder Staff Member

    you don't connect sync at all.

    5V go to pins 8 and 16.
  3. sheep64

    sheep64 New Member

    Thankx alot!!

    My cable is working but there´s a little problem.

    I have a original Sega RGB Cable for the Mega Drive 2.

    When I compare the color saturation of the Mega Drive 1 and the 2. The MD1 has a lot more color saturation.

    I think it´s TOO much. Can I reduce the color intensity by pulling the RGB channels down to ground with resistors? If yes, how much Ohm must they have?
  4. IceDigger

    IceDigger Founder Staff Member

    in fact, you HAVE to put a 75 Ohm resistor on each of the R, G and B lines, to get the normal output level.
  5. sheep64

    sheep64 New Member


    Do I have to put them into the line.

    Hard to describe in english ;) sorry.

    Sega Red ----------//--------- TV Red

    Or like this: (pulled to ground)

    Sega Red ----------------------- TV Red


  6. IceDigger

    IceDigger Founder Staff Member

    directly on each line, not pulled to ground.
  7. sheep64

    sheep64 New Member


    The cable is working fine now.

    I´m still searching the web for some info to make a RGB mod for my Master System without Sony chip.

    Maybe I should buy a nice Master System I ;)
  8. eke-eke

    eke-eke New Member

    hi ...

    i just open up a sega megadrive - mastersystem scart cable (the "black box" in the middle of the cable) and i found that the circuit inside is a little more complex than just 3 resistors and that the "sync" line is used for example (there a lot of more cable connected to the scart connector, such the blanking signal")

    is there someone here (arakon ??? ) who could explain the purpose of this little circuit inside the scart cable ,
  9. SEGA_Teufel::Ger

    SEGA_Teufel::Ger New Member

    One little question from me. What resistor I need for a 32x Conversion Cable (I want to find I out by myself but my multimeter broke down). [​IMG]
  10. Arakon

    Arakon New Member


    good question. I got no clue at all. nothing more than the resistors is needed for a good rgb signal.


    none. the 32x video link cable is a 1:1 cable.

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