good - some progress. Look at the Operatings Instrucions HowardR shows in post-15. We have the Work-Around on the not written 0. - Plugging-in and toggling-on makes the QB- and the ZB-Relay to actuate (if not already actuated in the game before). Then (in the Operating Instructions) the 1. works - and the 2. works and the 3. works and the 4. works --- we are on 5.
I always like to see the pin resetting the Score-Drums on all 4 players. You may have all the Score-Drums at Zero (?). Please toggle-off / unplug the 110VAC line cord (Safety Reasons), open the Backbox, take out the 100-points-Score-Drum of player-1 - manually put some points on the drum. The same on 100-points-Score-Drum of player-2, -3, -4. Have the 110VAC main power cord still unplugged - do the work-around (post-21) - plug-in, toggle-on, press the Credit-Button --- wait a bit. Does then the Z2-Reset-Relay pull-in, stays pulling and with the help of the turning motor - do the Score-Drums of player-3 and -4 reset (step forward) ? THEN Z2-Relay quits pulling, Z1-Relay pulls-in, stays pulling and with the help of the turning motor - do the Score-Drums of player-1 and -2 reset ?
IF (if, if) the Z2-Relay does not pull-in - just the motor is running: Wear rubber gloves or use an wooden stick - gently press the armature on Z2-Relay (while the motor is running) - do the Score-Drums reset ? Once again: NEVER touch bare metal / soldered-on wires in the pin with naked / non-insulated hands - current can kill You. Greetings Rolf