Quoted from ChrisHibler:That's pretty simple. On the power supply board, there is a trim pot to adjust display high voltage. Turn it down to the minimum that the displays still look good.
--
Chris Hibler - CARGPB #31
htp://ChrisHiblerPinball.com/contact/
http://webpages.charter.net/chibler/Pinball/index.tm
http://www.PinWiki.com - The Place to gofor Pinball Repair Info
There is also a labled test point so you know the voltage you are setting it to. Factory is +190 volts.