Earthshaker
Williams, 1989odd behavior on my machine First occasionally it resets not at the same time or place, not when hitting the flippers at the same time.
and the other thing is when relay 1 on the auxiliary board is in the "C" position to flash say a ramp flasher If I hit either flipper all the ramp flashers will flash for a quick sec. I cant figure out how they can be connected my schematic is not the best it was scanned and I think I'm missing pieces . any Ideas would be appreciated thanks
For that occasional reset, that's usually caused by the PSU. Most likely a cold solder joint is starting to form. You might want to consider reflowing the header pins on the PSU and where it goes into the MPU.
For the flasher/flipper issue, check the relay on the AUX board. That relay also turns on and off the ground to the flipper buttons.
As for the operator's manual, IPDB has it available in PDF form.
https://www.ipdb.org/machine.cgi?id=753
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Nashua, NH