I am converting a Scared Stiff pinball for use at 220v, that is originally a 115V game. The power control box on this machine only contains a thermistor, and not a MOV (metal oxide varistor). The line filter is located back at the cord attachment instead of in the power control box. Does this line filter have a MOV that needs to be changed out for conversion to 220v, or does this generation not require a MOV change out?