(Topic ID: 107551)

Bally Special Force solenoid expander board

By KenLayton

9 years ago


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  • 30 posts
  • 9 Pinsiders participating
  • Latest reply 4 years ago by barakandl
  • Topic is favorited by 3 Pinsiders

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#6 9 years ago
Quoted from barakandl:

Needs to be a 555 bulb. Not enough load from an led.

Quoted from KenLayton:

Yes indeed! This is one of those rare instances where an incandescent bulb absolutely positvely MUST be there. An LED bulb simply does not draw enough of a load for the Q25 to properly latch. Without a properly working solenoid expander board, the wrong coils will be firing!

I used an LED in my SEB on EBD and it worked fine. I guess it all depends on the LED and the tolerance of the SCR. Couldn't hurt to try.

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