In a one-player game, ball 2 goes to player 4 instead of player 1 and the ball count stops advancing. Later the score reels stop resetting at game start and the score motor keeps running.
Wrong player comes up on ball 2 and scores won't reset: stuck P relay switch
Cause: A stuck switch on the P relay (the relay that steps the player unit to the next player and ball) upset the player unit stepping and the reset sequence.
Checks
- Watch the P relay and the player unit at the end of a ball: the player unit should step the right number of times and the relay should release.
- Check the switch stacks on the P relay for welded or stuck contacts.
- If the reels still won't reset, check the score reel zero-position switches and the score motor switch that sends the reset pulses.
Fix
- Free, clean and gap the stuck switch on the P relay.
Some EM circuits run at line voltage; switch the game off before working on relay switches.
Systems
Games
Related tips
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- Game resets when a target is hit while the spinner spins
Source: Pinball Repair help group!! (Facebook group)