I'm putting this out there to see if anyone has any ideas.. I've read through a bunch of bally start up sequence threads, but nothing exactly the same.
The sequence seems to get through almost all the steps and then gets stuck in a loop after "The coin relay, through the score motor, will decrement the credit unit." step, endlessly adding to the total play count meter, and subtracting credits as the motor runs.
When I start a game (either by triggering the coin chute, start button with credits, or hitting the start relay), it does the normal start up sequence, including zeroing all the score reels, it then keeps adding to the total play count, and subtracting from the credit unit. It will indefinitely keep adding to the total play count and subtracting from the credit unit, even after the credit unit has zeroed out.
While it's stuck in the sequence, If i manually trigger the start relay, it will latch (unlatch? not sure the terminology) and stop the sequence. and then if I hit the hold relay, it will allow me to play a game normally, keeping track of balls and going into game over after the 5th ball.
My thought is that something is off with the ball count unit/ relay, but I'm really not sure. The "ball count relay" stays pulled in while the start up sequence is cycling endlessly. It stays pulled in until a ball has been drained, and then functions perfectly. not sure if that is normal?
I must have already added thousands of games to the play count trying to figure this out.
Any thoughts?
Here's the schematic:
https://www.ipdb.org/files/2466/Bally_1967_Surfers_Schematic_Diagram_continuous.jpg