Quoted from polyacanthus:No, I've triple checked. It's wired correctly.
I realize that voltages will be higher with no load. But at the transformer 48v coil I have 55vac.
I get 75v on the flipper voltage with both flippers held. It should be 50 but maybe it's not enough load for a good reading? I wonder what other people show for these voltages.
I've been told these numbers are normal but I have my doubts. If the schematics say 50v how is the technician supposed to validate that when the "unloaded" voltage reads 75v? Seems suspect to me.
Have you checked for "low line" transformer primary select configuration? The readings you are getting are suggestive of this.
transformer_primary_select.jpg
https://www.pinwiki.com/wiki/index.php/Data_East/Sega#Voltage_Selection_Jumper_Pinout
VAC readings are different from VDC readings because of the waveform. If you really want to get into it then lookup "RMS voltage" and enjoy having your head hurt.