The 6-9 bank works fine. When complete it gives a WOW when the right hand bullseye target is hit.
The top 10-Ace bank is good. When complete lights the four side roll overs for WOWs.
Problem: 2-5 drop target bank
(A) ONCE every 5th time when I manually complete the 2-5 bank, it gives a WOW immediately as the last target drops. Very odd.
(B) EVERY time the 2-5 bank is complete it gives WOWs at both stand up bullseye target, all four roll over lanes (and does not score 5,000 point - the 5,000 lights are on and not the four WOW lights.)
(C) in addition to all the items above, which ever top roll over (1,000 points) lane is lit up also gives a WOW. Huh? The unlit one scores the expected 100 points.
Neither should ever give a WOW. If the lights rotate, the new lit one will score a WOW.
I just got the game yesterday. The only other unfixed problem, probably unrelated; a previous owner had taped the wires to the 5,000 point relay lugs. I haven't soldered them on yet. Touched up the cabinet and it's looking pretty good for 48 years old!
I do have a good quality PDF scan I can send by PM. I can post photo snippets from my paper copy if needed.
I'm a semi-novice, can solve many simple problems but do have trouble finding the right paths and relations on schematics. This one is definitely beyond my skills.