Looking for help, game resets sometimes when both flippers are pressed simultaneously.
From what else I've read, there's a situation with old capactiors on the PSU namely the 15,000 mfd cap (C2?) and 100 mfd cap C5.
The quick and dirty fix that will not last apparently involves adjusting VR2 on the PSU to approximately 5.4VDC.
I assume, since there are no test points I can find on the PSU from the manual scans, is that it would be ok to test VDC across fuse F6 to dial in that voltage properly.
Any other tips?
Here's what I found:
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Here's some info from The Ninja:
"But the interesting thing about Alvin G games is the 5 volts on the power supply is adjustable via a small pot. Ninja turned the voltage up to 5.40 volts, and the flipper resets disappeared. Now at this point some ninjas may just walk away and call it “fixed.” But not this Ninja. Because the problem will come back. The issue was the 12/5 volt regulation caps were drying out and not doing their job. So when the flippers are pressed (putting stress on the transformer and effecting the other voltages), the 5 volts would dip, and the game would reset. If the filter caps were good, this would not be a problem.
The right solution is to fix the power supply. And that involves replacing the 15,000mfd filter cap for the unregulated 12 volts (which ultimately becomes the regulated 5 volts.) Also replace cap C5, which is a small 100mfd cap. This small C5 capacitor is wired after the voltage regulator (where the big 15,000mfd cap is wired before the regulator.) It’s important to replace both caps, which the Ninja did."
If the BR turns out to be good, definitely consider reap lacing those 2 caps. I've had a similar issue on a couple of Bally pins where replacing the big cap did the trick. They only last so long...
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