(Topic ID: 302944)

Credit wheel problem on Darling

By SimonTemplar

1 year ago

Topic Stats

  • 5 posts
  • 4 Pinsiders participating
  • Latest reply 1 year ago by southofi-10
  • No one calls this topic a favorite


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#1 1 year ago

Hello. I've run into a problem at startup on this machine. It's never done this before.
When you start a game, it does so properly, but the score motor runs continously and the credit wheel counts down to zero. Even then the motor continues to run.
I'm sure there's a switch stuck somewhere, but where do I start looking? Is this a relay contact stuck somewhere, or a switch on the motor stack itself?

I have the schematic available. Any assistance would be welcome.


#2 1 year ago

I'll need to see a high quality scan of the schematic from (for example) Staples ($2), Fedex ($6), or Office Depot

Until then, find the motor on the schematic and look at the switches that can keep it running.

#3 1 year ago

On this era of Williams machines, the reset relay has a switch that closes to allow a pulse from a score motor cam to energize the subtract coil of the credit unit. So, the first thing I would check is the reset relay. Is it staying pulled in all the time? That would cause the motor to continue to run and it could also cause all of the credits to be taken off.

If the reset relay is stuck on, you will need to figure out why that is happening. This problem is often due to the runout switch on one of the score units not opening when that score unit has reset back to zero. However, there are other reasons this can happen.

- TimMe

#4 1 year ago

I've taken a closer look at this, and I think (emphasize "THINK") this is being caused by a score reel that is not quite filly rotating back to zero. The reset switch is not being held in; I've watched it pull in and open again on its own, but if that reel is off a bit, then the motor continues to run, triggering the credit step down. Is this likely to be a problem with a spring, or a gunked up mechanism, or what?

#5 1 year ago

Look at your score reel switches.
Make sure when they zero out that the switch are eith open or closed.What even the game calls for.Usually open.
1 switch problem is all it takes.
Good luck

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