Quoted from sethbenjamin:It's been suggested, but...I'm measuring the same voltage from the board as I am at the cabinet switches. I'm all for upgrading/refreshing parts, but doesn't that indicate there's no need?
On system 11 machines, the power for the flippers goes from the +50V Unregulated supply, to the flipper coils, through the eos switch, to the cabinet flipper buttons, to ground.
The flipper switches will have the same +50 the flippers have measured to ground when open (and they are under no load). They will have 0 volts (since they have no resistance, thus no voltage drop) when closed since they are hooked to ground.
You may want to check line voltage, and if low setting your transformer to low line. This has an effect of making the flipper coils stronger, without changing them out, since it creates a +5 to +10 % voltage increase into unregulated power inside the machine. You can also use the method to help with some reset problems from low voltage.
You do NOT want to use low line transformer settings if your line voltage is high to begin with, as then you can put too much voltage into the machine. The first sign of this condition is bright GI bulbs that burn out quickly...