MV-1FZ and kof 2000 issues

[geise]

I recently bought a kof 2k cart that is perfectly legit. I have major graphic issues with the cart. All the graphics are garbled for backgrounds and characters. The text, menu bars, and character icons are all fine, as is the sound. I cleaned the contacts with alcohol, a pink eraser, and even some very fine sandpaper and still no go. All my other mvs carts work perfectly fine. This is being played on a MV-1FZ that is connected to a mini supergun. The power supply is is running +5v 5A and +12V 2A. Sadly the poweer supply is not adjustable. I noticed on hardMVS that the FZ board requires +5v at 7A. Could a voltage issue cause garbled graphics? I looked at all the solder joints and they look good. Also the kof 2000 cart is Set 2. Any help would be greatly appreciated. Here are some pics:

 

[alphagamer]

The official SNK data from the manuals (which are cited on hardMVS) is way off from reality. 5 ampere is more than enough, so it's not that.

 

[mjs256]

Do you have other games to check? If it is a problem with just this one game then it looks like a problem with the C ROMs.

 

[geise]

Yeah every mvs cart I own works fine. It's just this one giving me issues. This is the largest (meg wise) cart I own. I didn't know if larger carts would affect anything. I am thinking it's the C roms, but it's so hard to really see if one is bad or not. Would any other roms cause this issue? I know the C roms would be where I would want to start. What about the M1 rom?

 

[alphagamer]

Higher meg count games draw more current, but 5v 5a is still more than sufficient.

 

[Xian Xi]

Depending how old the other games are the newer larger games use higher address lines on the C roms where the older ones use the lower address lines. Since it's an FZ first thing is to check is if the riser card is seated 100%, if it is then you need to check continuity from the slot to the lower board. There could be some corrosion in the pin holes on the card connectors.

 

[geise]

I checked continuity and I'm getting good readings with every contact. The biggest MVS cart I have at the moment is Blazing Star. I didn't notice any bad traces either. The MV-1FZ board is in good condition. I also didn't see any corrosion in the cart slot contacts. I'll have to double check the cart. Would just one bad cold solder joint cause that much of a graphic issue? BTW thank you all for the help! It is very much appreciated!

 

[Xian Xi]

If it's the set 2 type KOF2k2 then you might want to verigy the P roms as I know one of them is a windowed eprom. If you want you can ship it over to me and I can take a look at it but I'd hold off until you get another higher meg game to confirm it's the cart and not the board.

When I said corrosion, I didn't say cart slot, I said card connectors which are the 3 connectors that connect the upper and lower boards on the FZ.

 

[geise]

A little update. I recently received Metal Slug 3 in the mail. I popped it in and it worked perfect. So, it's more than likely my kof 2000 cart. I'll have to see if I can mess with it. It's been cleaned to death, so it's probably a bad solder joint. That's all I can think off. All the traces look good. I'll have to pull out the multimeter. Thanks again for the help.

 

[Xian Xi]

Check if any of the C roms have cracks on the top of them. Either way if any of the C roms are bad it's just cheaper and easy to get a new cart since that game is pretty low in price.