i just bought a 1973 williams jubilee the owner said it did not work but when i got it home i pluged it up and it started to work. i think it has a few issues i just ordered a scematic for it to check switch positions and when the coils fire, voltage and other information. when i started checking the coil on number one player controlling the 100 score stays energized all the time and buzzes, i have checked for frozen switches on the playfield have not found any . the advance relay stays locked on all the time and buzzes its a m-29-1100 coil as does the change relay z-28-1200 that controls the lights changing on the lanes at the top of the playfield to extra advance, the advance unit under playfield has a coil a22-550 that stays energized all the time it gets hot and looks burnt so i figure its been doing this for a while,i think it should only be energized when it adds score when the unit steps down it controls the score lights in front of the horseshoe with the balls in it the small chime coil stays energized all the time sometimes the score adds points and sometimes it takes them away i switched the coil on the scoring real with another and it does the same . i think a switch is stuck some where trying to add 100 points at all times, i took the scoring reel apart to check for frozen parts but its free this is the only one that stays energized on the scoring reel i will tru to post some photos later i would be thankful for any help as i am just getting started in the hobby