I've got a customer who has a Street Fighter 2 and it's giving me a real hard time. He called me out as he could smell something burning the last time the machine was used. I've replaced 2 coils that were completely burnt to a crisp, fixed a GI short and now I'm stuck banging my head against the wall.
Right now the Q/game relay does not fire at all when a game is started (the coil has been tested and even swapped to another position and is works) I have the left upkicker coil locking on as soon as the game is powered up - for now I disconnected it. The ball release coil in the trough doesn't fire at the start of a game either but all coils work work during a burn-in test (obviously besides the one that locks on)
When you try to start a game it boots up players and then goes straight into ball search, after about 5 seconds the machine displays "balls stuck call service person". Also in the switch test the machine is reporting probably about 20 switches as inoperative yet none of them complete a row or column in the switch matrix.
I reflowed solder on the ground board by the transformer to ensure there's no ground issues which seem to plague system 3 machines. Do any Gottlieb gurus have any suggestions on where to start?System 3s are not my specialist subject so starting to feel a little lost with this one!