RGB Scart Picture Not Showing- NTSC Genesis Model 2

[Endgame22]

Hello, this is my first post here and to honest I do not know much about the rgb scart/modding scene. I'm hoping I can get some help from you guys.

I bought a Genesis model 2 rgb cable for my ntsc console from this ebay seller: http://www.ebay.ca/itm/110697672171?ssP ... 1497.l2649.

I have it hooked up to my Vp30 upscaler but I'm getting sync issues I think. I can't get a steady image, it just keeps flickering in and out. I can see some screen rolling as well. I'm not sure how I can fix this, or what may be wrong. My Saturn cable (from a different seller who doesn't have items on it's ebay store anymore) works perfectly with the upscaler.

Thanks.

[Fudoh]

welcome here on the board!

Did you try - as told via PM - unlocking the output refresh rate on the VP30 ?

The cable you got there is likely not a raw sync cable, but it uses composite video for sync. You can verify this. You're using a breakout Scart to RCA cable, right ? Connect the sync line to the yellow RCA input on the VP30 (instead of the white sync input) and switch the input to composite. If you get a picture, then the cable uses composite video for sync.

With the proper cable, the GEN2 can output pure sync. Might be worth a try to get another cable.

[Drachenherz]

spamtroll?

[Fudoh]

no. He's from the AVS board and I recommend to join here.

[Endgame22]

Hey, sorry late reply. So yes it is the setup you described.

I unlocked the refresh rate and I finally got an image, however it is dark and looks like it's missing white? I then plugged the composite cable in to the composite connection, then switched to Video input. The image looked less dark but still was off and missing white I think. There's also some vertical lines in the image.

[Fudoh]

I think it's worth getting a cable which uses the sync signal instead. The vertical bars (jailbars) will be gone to a certain degree as well with the new cable, but not completely. This is not a processor problem but a design problem of all Genesis units.

[Endgame22]

I'll return the cable I have I guess. Know where I can find a raw sync cable? Can't seem to find any on ebay.

[Endgame22]

Okay, so a weird thing happened. I received my Hama Scart 4 in 1 Switch box today, plugged it into the breakout cable setup to my upscaler and then plugged the genesis into that. The picture and colours looks normal now! I don't know how or why (the Switch box has a 75 ohm video conductor, that why? :/ lol)

[Fudoh]

glad to hear, even though it's a weird fix! You can still go for another cable if you find one to get rid of the remaining jailbars.

[Endgame22]

Yes, it is very weird. I talked to the seller of this cable I have and he said that they can make a raw sync cable by request, perhaps I'll do that.

So I'm confused about sync, I'm guessing that a composite sync is still rgb?

[Fudoh]

It's the same cable, the sync signal is just derived from another pin in the console's AV connector. In addition Genesis systems require a capacitor in line with the sync signal, which can be put on either side of the cable.

[Endgame22]

So depending on ones setup, either composite (csync?) or raw sync can be used. Raw will give me less jail bars?

[Fudoh]

yes, to fully remove them you have to do an internal mod, but using a cable which uses the proper sync signal, removes most of them already.

[Endgame22]

I see. Now the switchbox is showing a blurrier signal than just plugging system into breakout cable directly (tested with Saturn). Is this signal degradation normal with switch boxes?

[Fudoh]

unfortunately yes. Especially in the US it's hard to pick up a good one.

[Endgame22]

Except I bought mine from Germany and it's supposed to be a good one :-\ it looks okay, plugging directly to upscaler looks better though. I guess for recording footage I won't use the switchbox.