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Soldering, I do frequently for jamma setups and so on. I do not do this on the actual game boards because of lack of experience with de-soldering. To answer your question however, both sound processor and video processor are on the "A" board of a standard CPS-1 three (3)board stack. The "A"...

Yep I have had this problem to. All capcom CPS1 boards that I am familiar with consist of 3 main boards. The bottom one that plugs up the your jamma hareness (A), the second witch containes the game roms (B), and the third witch is the main processor for that specific game (C). With most...

I read your problem and have seen this happen before. Most likely you have not added the Negative (-) 5 volts lead to your jamma harness. This lead is used by a good majority of Midway games to supply proper power to the sound board. Look at the (component) side of your jamma harness. This...