That is one solution. There are 3 solutions that I can think of.
1. Purchase the cable mentioned above.
2. Rewire the 3rd party cable so that pin 7(console end) connects to pin 20 (scart end)
3. Connect a wire from pin 11 (cxa1145) to pin 3 (AV port). A wire should already be soldered from pin 11 (cxa1145) to pin 7 (AV port) on the French mega drive so the wire can simply be moved.
It all depends on what the op feels comfortable with.
This is an interesting problem. After a bit of searching, I found this thread https://assemblergames.com/threads/the-csync-on-genesis.53583/
As said above, the French mega drives don’t have Composite video (AV port pin 3) connected. They do have Csync (AV port pin 7) connected. Cheap 3rd party cables use Composite video for sync so your new cable wouldn’t work. As mentioned before, u need a quality cable which is wired for Csync. These cables from retro gaming cables https://www.retrogamingcables.co.uk/games-consoles/sega/mega-drive-1/sega-mega-drive-1-sega-genesis-1-sega-master-system-1-rgb-av-scart-cable-tv-lead say they are suitable for French mega drive and also OSSC. There is also a stereo audio version of the cable for better experience. They also have good info on RGB video and the difference between Composite video and Csync, for your information.
Have u tried importing the shopping basket to mouser from the GitHub .xml? Remember u don’t need the exact same product code, as long as the ratings match (resistors/caps). Most of those items should be available on mouser. The IR receiver dose seem to be causing a lot of people issues. There’s a guy on this forum in another thread who might have a few left.
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