Galaga 88' help converting to a switching power supply

GunSmoke Guy

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Galaga 88' help converting to a switching power supply

I have an Original dedicated Galaga 88', I would like to replace the existing power supply from 1984 "Astec Components Ltd." with new a switching power supply. Rather than re-wire the entire cabinet with a new JAMMA harness which I can do if I really need to, hopefully someone can help me without needing to do that. The game has it's own weird JAMMA type adapter from the factory. I see where it's connected on the harness it's labeled "Power", but I don't know what's ground, -5, +5, +12, etc... Nothings labeled.

Below are pictures of the inside of my cabinet showing the existing original power supply, along with the adapter I'm referring to. The first 6 wires on the adapter are power.. the ones to the right of it are speaker wires.
 

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Installed and working great!

I just traced the pins on the atari adapter,(on top and bottom matching it to JAMMA standards) and the first 3 are ground, next 2 are +5v, the last one is +12..I know the board is JAMMA i just needed to make sure.. Just sliced the wires connecting the molex from the old power supply and attached them respectively to the correct terminals to the brand new switching power supply. And of course A/C as well.

I was paranoid so I tested with a random JAMMA board to make sure and it worked!.. connected my Galaga 88' board to the adapter and I'm back in business!

At least I didn't need to completely re-wire the entire cab, and I'm still utilizing the existing wiring, I just cut a molex, and attached the wires to the new power supply.
 
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