(Topic ID: 259636)
Linked Games
Eight Ball Deluxe
Bally, 1981
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Also, which bumper is popping? That might be a clue as well. If the right one, check the diode there and at the saucer.
Quoted from BigAl56:This one is easy. I could answer it but I'll give you a hint and see if you can guess. Yea I'm sadistic I know, but I love switch matrix problems.
Take a look at the matrix above posted by Nokoro. Read it like a road map. To make the game tilt you have to travel from ST0 to I6.
You already figured out you will be passing through the 3x target and the D lane switch.
One corner of your route is missing? That's the bad shorted switch.
Hint there are game switches without diodes that are not shown on the playfield schematic. Pencil them in and you'll solve the puzzle.
Good luck,
L.
It would seem like the unmarked switch to the right of 3x may be shorted, but I had assumed there is no switch there. Am I wrong?
And, yes, you really are sadistic, you know. 
But, at the same time, you sometimes learn better by trying to puzzle things out on your own.
Quoted from BigAl56:Wasn't that fun?
Yes, actually. But, it is easy for me to say because it wasn't my game. 
It's also nice to learn things, and this time, I learned about unmarked switches in old Bally games.
Quoted from BigAl56:There is no diode on a coin switch. It took us years at Bally to figure out how to add a diode to a coin switch. Therefore if/when a coin switch gets stuck, a common occurrence, it causes matrix problems like this.
I guess there isn't much need for a diode on a coin switch. It would be pretty rude for someone to reach around the player and try to put a quarter in while they were playing, so it's pretty low risk that the switch is going to be closed during game play, unless of course, like here, its broken or shorted.
Good luck, OP! Hopefully this gives you the information you need to fix your pin.
Quoted from snyper2099:Right, switch test would reveal the problem simply looking at 2nd pic. in post#7 and with no tools in about 5 seconds. Typically, people new at pinball repair do not realize how the switch test can help solve things very quickly. Learning how to use that test is so important with early Bally machines. Most people that own these machines don't even realize that there is a SWITCH TEST.
Good point, as long as none of the other switches 1-9 are closed or broken, this could have helped narrow down the problem. None of this is intuitive, though, so it is nice to have pinside as a place where people can talk you through it.
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