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Old 12-12-2016, 11:32 AM
Millertime Millertime is offline
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Default Williams teachers pet scoring keeps turning

As soon as you hit the start button the scoring begins to go by 10's. Sometimes it does it sometimes it doesn't. I've narrowed it down to the 2- drop down targets but see nothing wrong. Some help would be appreciated.
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Old 12-13-2016, 08:34 AM
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pinballdaveh pinballdaveh is offline
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Default

If you know the problem is the 2 drop down targets here is what to check. The scoring on each Williams drop targets works off of 2 normally closed switches wired in series. When the target is in the up position the top switch will be open. When the target starts to drop when hit ,the top switch will close completing the circuit for scoring. When the target drops to its bottom position the bottom switch will open, stopping the scoring. This is how newer williams em machines drop targets work. Pinball database does not have info on this, but should be the same on your machine.
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