(Topic ID: 221690)

Eight Ball Bally - 1A Playfield Fuse blowing - Slingshots & Middle Pop

By crazi

3 years ago

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  • 20 posts
  • 8 Pinsiders participating
  • Latest reply 3 months ago by pins4u
  • Topic is favorited by 1 Pinsider


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#4 3 years ago
Quoted from crazi:

Checked the coils out of circuit with the diodes off. Slingshots 7 Ohms and Pop 3.7 Ohms (all 3 seem ok to me)

Slingshot and pop bumper coils are the same spec and should measure around 11 ohms. Compare against one of the working pop bumper coils.
Some of the Marco coil wrappers list the DC resistance - see 10.7Ω here:

#6 3 years ago
Quoted from ForceFlow:

Are you sure it's supposed to only be 1A?

1A slow blow fuse under the playfield for the solenoids is pretty standard for Ballys of that era.

#9 3 years ago
Quoted from crazi:

Would a 3 Ohm (7 Ohm difference) be enough to pop the fuse?

Yes, that's nearly 3 times the current being drawn.

Quoted from crazi:

Working coils are measuring between 10 and 11 ohm....
Like wise the Slings are measuring 7.1 Ohm would a 3 Ohm difference pop the fuse?

The fact that the coils at proper spec of 11 ohms aren't blowing the fuse and the 7.1 ohm coils are should answer that question

Are they all 26-1200 coils or has someone installed the wrong ones? Do they look like they're cooked?
BTW when you checked the diodes on those coils, did you you test the diodes disconnected?

#12 3 years ago

You linked Eight Ball Deluxe to your thread, but only mention 8 Ball in text. Which game is it?
Nevertheless, both manuals state the Pop Bumpers and Slingshots are AN-26-1200 coils:

#15 3 years ago
Quoted from crazi:

So as 1A is quite low for coils.

I think Bally would disagree with that.. As zacaj mentioned you're comparing to different manufacturer/voltage games.

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