(Topic ID: 224498)

Williams System 11 background sound board melts -12V!!!

By PiLgRiM

5 years ago


Topic Heartbeat

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  • 16 posts
  • 3 Pinsiders participating
  • Latest reply 5 years ago by PiLgRiM
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#2 5 years ago

The ribbon doesn’t carry power. It only carries TTL data.

Installing it backwards shouldn’t have hurt anything. I’m sure that I’ve done that at least once.

The component on the background sound board that uses -12V is shorted. Off hand, I don’t know what that part would be.


Chris Hibler - CARGPB #31
http://ChrisHiblerPinball.com/contact/
http://www.PinWiki.com - The new place for pinball repair info

#7 5 years ago
Quoted from PiLgRiM:

The only other thing I did was to fix the solenoid ground from 3J3 (power supply) and tapped it over to the ground on 3J4.

I don't think this would cause an issue but why was this necessary?
--
Chris Hibler - CARGPB #31
http://www.ChrisHiblerPinball.com/Contact
http://www.PinWiki.com - The Place to go for Pinball Repair Info

#9 5 years ago

Weird. Thanks for the info. BYW, your OEM board will be much better when repaired.

Chris Hibler - CARGPB #31
http://ChrisHiblerPinball.com/contact/
http://www.PinWiki.com - The new place for pinball repair info

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