I have repaired many SS pins right down to board components, but I do not have any experience on an EM. I have an electrical technician background, but it is only used on pinball machines.
I need some help. I bought a train wreck of an EM and I am troubleshooting it, but not having done this before it would be nice to hear some second opinions and some general "Yes, you are doing it right" or "No, you are doing that wrong" from others with more knowledge than me.
I am using pinrepair, and I have the schematic from PBR.
When I plug in the pin the backbox lights up and so do the coin door lights. That is pretty much it. The primary fuse holder was a corroded mess, as was the fuse so I replaced both. The line cord was also a mess so I have replaced it, but the readings are still off. According to the schematics I should be seeing 25V for the coils and 6V for the lamps. I'm only seeing 4V at the 10A fuse holders (LIGHTS) and 14V at the 15A fuse holder (coils). So I went back to the transformer and I am not seeing 25V from any tab on the transformer. Here are my readings. I am using my black lead on the ground lug.
I'm also getting 4V from another lug (LIGHTS) on the opposite side of the transformer (not shown in the picture).
As you can see the transformer is a mess but I've seen worse. Is there anything else I should be checking? A switch that deactivates high power?