Street Fighter 2 CE Jamma Help

narkotic

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Hello - I have a once working Jamma board from my SF2 CE arcade that stopped working. I found a surface mount cap sitting atop another surface mount cap and have never seen this before. Touching it with a probe showed that it was loose.

I'm trying to find out if this cap came from somewhere else and is why the board isn't booting. Have been scanning the board with my eye and cant seem to find any pads that had a component fall off.

I should add that I believe this happened after I was seperating the boards to replace some of the chips with red wave chips I burned.

If anyone has this jamma board, it's the bottom-most board with the dip switches. There are two chips below the "zilos" chip, the floating cap was in between them.

Are there any schematics out there for these?


Thanks...
 
No schematics that I've ever found.

Does it do anything? If it plays an audio sound immediately upon power up then the main CPU is dead.
 
It doesn't do anything :(

Man, these boards must be very sensitive to ESD or something, I've been handling PC motherboards for decades and haven't ever had an issue like this. No sound or anything. Sigh....
 
I doubt it's ESD, especially from your soldering iron, unless you're in a very dry-aired place and you can actually see sparks coming from things you touch after you've walked like 2 steps. :p

really from what I gather, these CPS1 boards are just very fragile. I'll make note of the CPU being dead if it plays sound on power-up thing.... but if you're not hearing anything at all, generally I think that's a cap failure. I think audio problems like that can be fixed, but when you get into like the scrambled graphics and such, then your A-board (I think) is no good.

and if channelmanic can't get it done, really, no one can. :(
 
No schematics that I've ever found.

Does it do anything? If it plays an audio sound immediately upon power up then the main CPU is dead.

I get no sound or video on power up. I've had people send me hi-rez shots of their boards and I don't seem to be missing any components... The cap I spoke of earlier must have been just a manufacturing error.

I'm at a loss - I found a company that has a jamma test bench but they're only open during the day and i'm stuck at work...

Hmm any other ideas?
 
CPS1 sound fix

I recently bought a lot of cps1 boards that had sound problems, all were fixed with a Z80 chip, as far as video I really cant help ya there, I have a few extras if you need one, I will trade ya for a rom set to change a ce edition to rainbow or redwave
 
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