SNESNESCUBE64

It seems this is a really bad power supply, the voltages keep on fluctuating and I can't imagine that it's a good thing in the long-run. Any recommendations or should I just get a good PC power supply and use that?

Yeah, I plan on buying a different power supply. I learned my lesson on buying a cheap power supply. I think I am going to modify a PC Power supply as I have a verified good working one on hand. Thanks for the correction, I am new to this sort of thing, I have never used negative voltages before. I'm just glad it's working at this point, I was getting stressed out about it.

I just fixed it! It turns out it was a power supply problem. How it works: So basically, the converter uses the -5V line to un-invert the colors (Nintendo unisystem boards output inverted colors because of the sanyo monitors). So what was happening is my power supply is outputting -4.4V instead of -5V which is too high. So what was happening is that the sync was also at too high of a voltage causing it to have a different sync than what is needed. My solution: I put a potentiometer on the sync line which allows me to adjust for this higher-than-necessary voltage. So far, it seems to have worked. There are still little blips here and there, but I am going on a limb and am gonna say that it just needs more fine tuning. Thanks for the suggestion SignGuy81, all the caps on the board are fine, this is the first thing I checked. To be fair, re-capping it is probably my worst nightmare. I counted and there are more than 60 electrolytic caps and about as many ceramic ones.

Hi Atariage! I am new to the forum but I heard a lot of great things about here, and I figured you guys could potentially help me with a problem I am having with my Nintendo Vs System (If this is in the wrong section I apologize in adavance). Anyway, I went to go test it today as I finally got a jamma adapter in the mail on my VGA monitor, and the picture is flickering as if it has a sync issue. Now I am converting from the RGB with a GBS-8220 as I do not have an actual monitor for it (am building this cab from the ground up with just a board). I linked a video down below to show what I am talking about. Do you guys have any suggestions on how I can fix the sync issue? I do realize that the color is off, it has the wrong ppu version of the ppu in. https://www.youtube.com/watch?v=ZQ4YBRxpBvw