Quoted from jetmechinnc:If I am reading the wiring diagram correctly, the player unit has an effect on the bonus as well as the ten and the ten thousands units? Plan to Completely disassemble it and clean all contacts , and verify continuity on each wire for that disc that maybe were not cleaned properly.
F relay, 00-90, only moves during 100 points. Should it be moving for all score reels? Seems like it should move for the tens unit, unless this is just for match feature on the print.
Don't touch the player unit! The PU has nothing to do with your initial problems that HowardR addressed in his posts.