I just bought a Jet Spin a couple weeks ago. It works great EXCEPT every time you hit the round target on the left > it awards an Extra Ball (even if that target isn't lit for Extra Ball) ... Having some friends over for pinball tournament tomorrow and want to fix this.
I am NOT an electrical genius ... I did look at the Extra Ball Unit relay ... When I examined it and relay OFF > BOTH contacts were touching ... Thought maybe an "easy fix" so I spread the contact closest to relay so NOT touching (seemed like a good thing to try .. LOL .. like I said I'm NOT a genius) .. So NOW when relay OFF the contact closest to the coil is NOT touching ... contact farther from relay is touching. When hit the red target the relay activates and the contacts "switch" (closest to coil touches .. farther doesn't) ... Well the good news > fiddling with the close contact didn't appear to break any thing or make it worse ... but didn't solve problem either ... (SHOULD I PUT THIS BACK TO WAY IT WAS??)
Don't know if this tell you anything > switched the Extra Ball plug that goes Conservative or Liberal ... no effect on problem. I also pulled the pin completely out > no effect on problem.
I have a schematic I just bought ... I found the Extra Ball Relay on it at 4 1/2 E .. but, did I mention, I'm not an electrical genius... so can't tell what to look for ..
APPRECIATE YOUR TIME and HELP !