The thousands score reel advances 1 position at start up. Maybe a few digits, but generally stops at #4. All others advance to 0 and the game is ready to play. So, the player has 4k even before starting game. Actuating the L relay or any relay controlling the tens, 100's, 1000's advances the next decade reel. Any thoughts where start up pulses come from? I put my time in at a customers house trying most everything I could to no avail. I have the schematics at home to go over, "P" I assume player unit, but at the time I did not know where position 3C was. Since all other reels are advancing and there is a common amongst all, I assume it's switch P3C. Good assumption or bad?
Does the disk on the score reel (either the 100's or 1000's) have anything to do with this?
Thanks!

Solar City Schematic (resized).JPG

Yes I did check that carefully, as mentioned the score on player one 1000's unit doesn't advance to 0 on start up. But once start up is finished all digits work fine because they are being controlled from each of their own relay. During start up none of the relays activate. The score reels are pulsed directly bypassing these relays. I will go to the animation of a Gottlieb start up on Utube and see if I can discern what might be happening.
One other thing, the person who owns the machine reported that player 2 does not "score" properly. I bet it too is the 1000's reel and something is telling me it's in the Player Unit associated with the cams in back of the stepper unit.