Reply To: Megadrive VA0 RGB bypass

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October 13, 2018 at 4:11 PM #23349
renovigo
Participant

    Hi,

    Thanks for all these replies. I’m sorry we’re encountering the kind of same troubles here.

    I digged a little bit more into the problems I got. I’ve been told by the guys from retro rgb that it was maybe better not to lift the csync on the VDP, that’s why I put it back down and it seemed to solve the sync problem.

    Also, concerning the interferences issue, I tried to add a capacitor (16v, 225uf) on the bypass board between the grd and 5v pads, and I got rid of the interferences. I refered to this link here.

    BUT….the image I get is still too dark, too red, and jailbars are still here.

    About not having any image at all, maybe check were you ground your bypass amp. I had this problem at the very beginning, and I got an image by grounding on the daughterboard of the VA0 (there are two little pads right beside the crystal oscillator on the extra little board, I wired the ground on one of them).

    I think I will wait for more users experiences or updated guides from now.

    Thanks