To my knowledge there are numerous bootleg JAMMA Pac-Man boardsets out there, probably all with unique settings. Your best bet is to just try different settings until you find the one you need. There should only be 8 switches and usually the first few of them set the pricing. Shouldnt take long.
Free play should be a dip switch but some settings on the bootlegs(such as cocktail mode) are done by jumpering on the board. We really need to know what bootleg board you have, there are many out there.