(Topic ID: 227908)

Williams Grand Prix trouble

By pinballman3

5 years ago


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#6 5 years ago

It’s likely one of the switches circled in the lower part of the schematic. Each of those when closed energizes the score motor, thus any of them stuck closed will result in your symptom. You need to go find each switch and ensure it’s not closed. You can stick paper between them if your worried your not sure if it’s open or closed. If it’s of help, some switches are on the playfield others will be in a relay stack in the bottom. I am going to bet it’s the reset relay based upon your description. It’s also the one switch in that list that’s likely to be gapped quite tightly and could easily have an issue.

#8 5 years ago

Ahhh... I did not understand that- The outhole relay is pulled in by the outhole switch, the left and right bonus relays and zero switch on left and right bonus units.

The manual for this game is freely available on IPDB as well as schematic. My above information is basically a direct quote from the manual. You should download and read. The manual for this game is exceedingly good and easy to understand.

The manual will tell you that the switch of the left and right bonus relays that activates the outhole is the furthest from the coil and is a NC switch.

I am still not sure I understand what’s going wrong exactly but you can use this info to look a bit... did not mean to hijack the help you were getting (it is very good help, listen to HowardR the dude knows his games) and I would look carefully at the switch stacks he circled in red as I think he was correct to have you inspect those based upon your initial description. I am not sure based upon your recent description, but either way, the components identified are a small list to inspect and you should find the problem in them unless we are simply not understanding the issue.

Download the manual and look at the description for the outhole and bonus relays....

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