Do all Genesis 3s have jail bars on RGN and S video

Hi there. My Genesis 3 has the jail bars on RGB and Svideo but not composite. I paid quite a lot for it: got it imported from USA, bought a UK AC adaptor, RGB cable, S-video mod, composite out mod, 50/60hz switch, LED mod. So im a little disapointed that its got jail bars. Id anyone elses the same? Its more noticable on an LCD TV.

The reason I got a Genesis 3 was so I could put it in my luggage and take it with me on ship where I work.

Is it possible to swap out the video chip if that would resolve it?


Any help would be great!

It's not quite clear yet. Some theories on the more extreme end suggest RGB jail bars could be inherent to Genesis hardware.

I have quite a few Mega Drive 1's and none of them have jail bars when using composite. A mate of mine also has a 2 Mega Drive 2 with an RGB cable and there is no jail bars either.

Do any of the hardware guru's know if I can swap out the video chip with another from an MK2 or MK1? My soldering skills are pretty good so it shouldnt be a problem.

I've worked in many Genesis 3 systems and have never seen any with jail bars..Any pics of what you're talking about?..

Hi. Thanks for reply.

I dont actually have a picture at hand as im away from home and wont be back until xmas. It the usual jail bars that people have discussed before. I have a VA2 Genesis 3.

Do you have an RGB cable and LCD TV to test it on as its alot more noticable on LCD's


Edit:

I looks like this: Attachment 4144

Attachment 4145

Yep, I know for a fact some revs. of the model 2 have this issue I've seen it for myself, but never it Genesis 3's.... You see them in s-video too?..That's just a bit weird to me...

yeah i see it on s-video aswell. ill need to check my soldering again. maybe its a little tight on the chip.

That's normal for Genesis/MD hardware, my Japanese Mega Drive and VA3 Genesis 2 do it as well. Even my VA2 Genesis 3 had them.

Wait a minute, are you referring to the banding, or the jail bair issue as seen on some Genesis 2 systems?...They are two different phenomenons....

Quote:

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Originally Posted by ooXxXoo

Wait a minute, are you referring to the banding, or the jail bair issue as seen on some Genesis 2 systems?...They are two different phenomenons....

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I'm talking about the jailbar issue, the kind you see on the screenshots Anonymouse posted.

Turn sharpness all the way down and try to disable all video filters. That should help a lot.

Im trying to find a solution to fix the genesis 3. I came across this topic: http://www.assemblergames.com/forums...=32194&page=10

Do you think this would apply? I dont have a Genesis 3 at hand. Is there anyone able to comment that has one?

What is the video chip inside a VA2 Gen 3?

The CXA1645

Quote:

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Originally Posted by Anonymouse

Im trying to find a solution to fix the genesis 3. I came across this topic: http://www.assemblergames.com/forums...=32194&page=10

Do you think this would apply? I dont have a Genesis 3 at hand. Is there anyone able to comment that has one?

What is the video chip inside a VA2 Gen 3?

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If the conclusion that topic has reached is really true, then the VDP is responsible. You'd have to reverse engineer the Genesis graphics processor and fix its design.

Which means needing access to a semiconductor plant...

Quote:

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Originally Posted by lumclaw

If the conclusion that topic has reached is really true, then the VDP is responsible. You'd have to reverse engineer the Genesis graphics processor and fix its design.

Which means needing access to a semiconductor plant...

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Or lots of transistors and resistors.