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!

James

That makes sense but my issues are not specific to one column or row in the matrix, the switches that are ‘inoperative’ are scattered all around the matrix