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Is your FH really a System 11?
Probably not.
Each of the four buttons has an independent orange wire that leads to the direct switch connector on the MPU. There is also a black wire that is jumpered to all four switches that provides ground.
That’s it.
Check for alkaline corrosion on your MPU.
—
Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
http://www.PinWiki.com/ - The new place for pinball repair info
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Chesterfield, MO