Well I've progressed (and fixed other issues along the way). Scoring motor fixed and no longer slips (clutch). Player 4 1k reel wouldn't reset but worked fine in game(improperly gapped reel switch). Had partial reset issues now fixed too(broken solder joint on reset relay #1).mrmikeman wrote: ↑Tue Jul 05, 2022 5:00 pm So today i continued (albeit unsuccessfully) to chase down a short in my EM. Was intermittent now unplayable. Can’t score 1000 pts it shorts out. I have ruled out the pf as the short is still there with the pf disconnected.
It’s not a score reel coil (shorts on all 4 players) nor is it the chime unit since it’s electronic sounds and i disconnected that board to be sure.
It’s down to the scoring motor(cab) or the player unit(head). Maybe something for next weekend. I have already gone over the pf and cab switches and relays as part of my restoration. Head was left but the game was playing well up to now.
The short is definitely in the wire bundles that go to the score reels. By wiggling them a bit the game now works but I can still see all the lights dim when 1000 pts gets scored so the short is still somewhat there, just not enough to prevent the game from working.
Also found another issue while test playing. Player 4 does not advance the 100,000 reel when the 10,000 reel advances from 9 to 0 but does advance when I trigger the 100k relay. It's not the "9" switch on the 10,000 reel that's the problem.