At game start the player 3 and 4 score reels go to zero but the player 1 and 2 reels never move, and the score motor keeps running.
Players 3 and 4 reset but players 1 and 2 never do at game start
Cause: The reset happens in two stages: one reset relay (Z2) clears players 3 and 4 and only releases when every one of those units reads zero; then the other relay (Z1) clears players 1 and 2. Zero-position switches on the score reels and the matching switch pairs on the reset relays were out of adjustment.
Checks
- Watch which reels stop short of zero.
- On these early ten-sided score reels all three zero switches must be open at zero; check each one.
- Each switch pair on the two reset relays corresponds to one reel; check the pair for any reel that keeps cycling.
Fix
- Clean and gap the zero switches on each score reel.
- Adjust the matching switch pairs on both reset relays.
- Clean and adjust the ball count unit contacts as well.
Turn the game off and unplug it before adjusting switches in the cabinet or backbox; EM games carry line voltage and the score motor can move unexpectedly.
Systems
Games
Related tips
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Source: Pinball Repair help group!! (Facebook group)