Quoted from DanDaMan:Bought my 1st pinball earlier this week - it is a 70 gottlieb aquarius. Been doing some reading and see most EM games have 20V AC inside but read that some have 50V and some parts may have the full 120V. I have a few things to figure out and fix on mine but to diagnose I need to power it up and play with the switches - is this dangerous?
When I first got it I touched the buzzing switch on the coin door (the switch that connects to the start button) and felt a tingle - is that the worst I can expect?
Potentially - yes! As a rule, you should ALWAYS unplug the game (not just turn it off) when working on it. Certain circuits in the game, including the transformer and portions of the coin door, receive line voltage (120 V) and are therefore dangerous while powered on. Even experienced EM techs can easily get shocked by inadvertently touching a hot circuit with their hand or conductive tool.
