When I power the game on the GAME OVER relay and the FIRST BALL relay pull in and hold. The playfield is dark, the backbox and coin slots are lit up.
When I press the Start button on the front of the cabinet the TILT, TILT HOLD, REPLAY BUTTON, START, FIRST BALL and RESET CONTROL relays all pull in and hold, the reset sequence begins and the playfield lights up. Early in the reset sequence the REPLAY BUTTON relay and the START relay release. When score reels zero and reset sequence is complete the RESET CONTROL relay releases, the TILT, TILT HOLD and FIRST BALL remain energized and the ball is kicked into the shooter lane. Playfield coils and lamps are activated normally and the ball in play indicator lights ball 1. After resetting the 10 point and 100 point switches score the correct value, however, if I close a playfield switch that scores 50 points the game resets. If I don't score 50 points on a ball, when the ball drops into the outhole the bonus counts down, the ball is kicked out into the shooter lane and the ball in play advances.
After starting a game if I rotate the score motor slightly it takes off and runs 1/3 of a revolution, during which no score accumulates and the game does not reset.