Pinball newb here with little experience working on these but trying to learn. I definitely do better with hands on than schematics but I try.
From unplugged state:
1.plug in (nothing)
-playfield and head unit lights turn on
-game adds credits correctly
-ball kicks out ready to plunge
All score reels fail to reset •
Playfield is active and all score reels will accumulate points correctly except for the ones reel.
The ones reel will mostly spark and make a buzzing sound when bumpers or targets are hit but will %90 of the time not advance. Ones reel can be advanced manually with finger and moves easily. Tapping ones relay will also add points to ones reel but bright sparks occur when tapped. Sometimes the relay holds shut and blows the fuse both when manually tapping or via playfield
Ones reel will NOT advance tens reel when rolled past 9.
I hope i explained that correctly. I guess the thing to do is to get the reset working properly.
Thanks for reading.