tron test points +5v

check on one of the rom chips, on the outermost board. they will be the socketed chips with labels on them toward the top of the cabinet on the boardset. to check, you should see a little notch in one end of the chip. put your positive wire on that, that is the +5, and the one on the opposite side at the other end is ground. here's a pic that shows you. the pin labeled vcc is always +5, and that's where you want to check it. the ground one is the same on them as well. to give you an idea, as the chips will be upside down if you are looking at the boardset in the game.

7400-pin-assignment.jpg
 
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