I recently bought a 1964 Williams Palooka, my first pinball, with some startup problems that I haven't been able to resolve. I have the schematics and slowly begin to familiarize myself with it, but so far I haven't detected what's wrong.
I cleaned all contacts, cleaned and lubricated score reels and searched for loose wires etc, but so far I have only come up with an undersized relay for the single digit drum score reel. But even if I bring all numbers manually to zero, the machine is stuck in its startup mode and the score motor doesn't stop to turn and the targets reset relay is pulsed continuously.
I found that the score motor gets its current at the end of its (infinite) reset sequence through a closed target reset switch caused by the pulsed target reset relay so I put a paper between contacts 4B and 5c of the score motor to stop the endless resetting. Now this is currently the Reset Sequence:
Power off state: Score is 1111. I manually moved the ball count unit to ball 3 or so. Game over and Game relay are latched. Tilt relay is latched. Pieces of paper between score motor contacts 4b and 5c. (Without them the sequence seems to be the same, but the score motor runs endlessly)
From what I can see, the sequence is as follows: On power on through the left flipper button, the lock relay energizes and the latched game relay gets tripped by the game trip relay. Also the score motor runs to its home position if it was off previously (cutout in the index cam).
Triggering the coin switch then energizes the coin and the reset relays for a short while, then the game relay latches, immediately the reset and coil relays de-energize and the score motor stops (or continues to run and continuously resets the drop targets. Also the ball count unit is at zero and the Game Over light is on (I understand that Game unit =0 triggers the game over light). The score got increased by 5 on all reels (except the #1 reel that is underpowered and resets unreliably), but did not get fully reset.
The Game relay is now latched, the Game over relay is latched and the tilt relay is latched. Score motor is in home position.
Now I can force a successful completion of the startup routine by manually closing the coin relay for a few seconds. Through this the score DU goes to 0 on all numbers, and the ball count goes to 10 and the game can be played (!?).
Besides these problems there are a few things I don’t understand:
The schematics suggest that a reset relay switch is connected through a blue – green wire to all the zero switches on the drum reel. From that I would expect it goes to the middle switch on the score DU which opens at zero. Instead it is connected to the top contact (Which I assume is the #9 contact, always open unless it’s 9, then it closes) .
Then the score motor turns counter to all the other score motors I have seen on Youtube (Mostly newer models though). From its home position, it triggers cam 5 and 6 first , then 4, 3 ,2 , 1. The motor turns into the contact leaves rather than the other way.
I appreciate any advice how to proceed.