MVS Colour Problems

I'm having a problem with a MVS system that I recently aquired. It's a 2 slot board that has been consolised.

It looks like there is something wrong with the RGB signal as a lot of the colours look wrong on the screen. The reds are affected worst as pure red looks more like a brown colour.

Just wondered if anybody had any ideas as to how this can be fixed. I'm still new to this whole thing so i'm not sure what information to provide but i've got the case off so if there's anything else i need to put here let me know and i'll take a look and find out.

Thanks very much for any help.

Have you confirmed the problem is actually on the MVS board- if so this may be of interest.

http://www.neo-geo.com/forums/showthread.php?t=78595

I believe that the problem is on the actual MVS board itself as the scart cable is soldered directly to the Jamma/MVS connector.

I noticed that when games 'fade in' from a black screen, everything looks normal until the colours reach full brightness. Also while i'm playing the colours will flicker slightly sometimes for maybe a frame at a time. The colours that it flicks to look a lot better than what it is showing 99% of the time.

I'll need to get someone who is more technically minded than me to take a look at that thread and see if it helps any.

Ok i got it fixed (sort of)

Tried it with a different TV and the colours looked ok but there was loads of bleeding on the reds. A similar effect to when you have the 'colour' setting too high on your TV set.

So I turned the 'colour' and 'contrast' settings down (way more down than is needed with anything else) and the picture looks fine and I can get back to enjoying my neo games

Any ideas why I have to turn these settings so far down on my consolised MVS?

That's only normal when you send the RGB from the board to the TV without any resistance in between. Put resistors on each RGB wire and it'll be OK. The resistor value depends on you: start with 82ohm and see how it goes. If necessary, raise the value until you get the picture you want.

By the looks of it, that's exactly what it is as the scart cable is soldered directly onto the jamma/MVS connector. I'm not really confident with a soldering iron so i'll just leave it as it is. But thanks very much for the info i'll certainly give it a go if i can find someone willing to do the physical work for me.

Is it possible for this type of setup (ie. RGB signal without resistance) to damage a tv set? I only ask because the first TV I tried it on died about 10 seconds after the MVS was switched on and has never worked since!!