This mod uses the diodes inside the extra bridge to drop the feature lamp voltage. The later bally transformers put out very high feature lamp voltage. I have seen it close to 8vdc in kings of steel which will burn out the feature lamps fast (or melt LEDs). I would measure your feature lamp bus voltage before deciding to reverse this. You may be better off leaving it in.
I think there was a major distributor that did this mod to every single one of their games. Quite common and always done in the same way.
Quoted from Russ1302:That's what I was thinking. Thanks for confirming that. Can I flip the Rectifiers to the top side of the board when I replace them?
not without adding a substantial heat sink to the feature lamp bridge. Keep it on the bottom. Use a thicker brand of bridge rectifier and it will mount underneath ok. Like GBPC3506W by Fairchild / On Semi are right size but Vishay is too thin.
