I have recently acquired a Williams Big Strike which is not resetting correctly.
I have rebuilt the score reels which were gummed up, they now score and reset correctly, the ball count unit was also gummed up, I have cleaned it and replaced the springs and it now steps up and down smoothly.
I have been through the motor board and score motor and cleaned and checked the gaps on all the switches and all seems ok.
What is causing me some head scratching is that there is a switch in the backbox to select 7 ball play or 5 ball play or add a ball play (which I assume should give 5 balls initially?)
At the start of a game, on the add a ball setting it gives 7 balls, on the 5 ball setting it gives 7 balls and on the 7 ball setting it gives 2 balls, this is consistant and has me baffled.
I have watched the game reset and the strange thing it does on the 5 ball setting and the add a ball setting is that the relay bank reset coil pulls in twice, this is when the two extra balls are added to the ball count unit. My thinking is that as the score motor is turning at this point it is closing the "pulse ball count unit" switch an extra 2 times.
On the 7 ball setting the relay bank only resets once which seems normal but only 2 balls are added to the ball count unit.
The schematic is on the IPDB and I have checked everything which looks relevent but with no success, if anyone can help I would be most grateful.
Many thanks, Richard