Hope you meant 125V not 12V

Do you have schematic? It should be straightforward, move the two 220v wires to the 125v lugs. I don't think you need to disconnect everything else connected to lugs or the backside.

BOTH transformers should have the 220v going to them on one side. . each provide a separate set of lower voltage on the other side to various parts of the machine. Both transformers will need to have the wire on the 220v lugs moved to the 125v lugs.

But....

To be safe I'd pull all the bottom board fuses and pull any connectors that aren't fused on the schematic... power board connectors A2J1, etc... and measure all the AC voltages on the other side of the transformers.

Let us know if you don't have the schematics. It's not that complicated if you see the diagram.

There's a diagram on the schematic on how to hook up the 130v transformer (North America) to handle 220v. The other thread looks like how to rewire it back to 120v... your transformers look like they were made specifically for 220V (different part number on it). Makes it easier for you. No series connections to worry about. Just connect to 125V instead of 220v.

You may find the voltages on the other side a little low though since you're only providing 120v instead of 125V... maybe not.

Google your transformer part numbers C-19555 and C-19551... maybe other forums or sites with details on them.

pdf of Gottlieb Amazing Spiderman user manual can be found here:

http://www.gametronik.com/site/fiche/pinmame/Spiderman/

It is the North American version so transformer page won’t reflect exactoy what you have now.

Yes those are all the secondary side lower voltages. On one transformer those show specific voltages and on the other transformer they are lug numbers which you can see on the schematic.

I believe so. I’d expect that if you just plugged it in now, since your primary voltage is almost half (120 vs 220) that you would get only about half on the secondary sides... 5v would only be 2.5ish, 12v would be 6ish. Wouldn’t recommend it because I’m not sure how lower voltages may affect the boards.