The pictures below show the End-Of-Stroke (EOS) contacts for the flipper assembly.  Notice on the top picture that the contacts are open indicating that the flipper is energized (the flipper button is depressed).  The second picture shows the same contacts when the flipper is de-energized (the flipper button is not pressed). 

I've also included a couple of pictures of EOS gaps on a Twilight Zone (gasp - this is an EM page) to illustrate the EOS gap. There's also a picture of a Twilight Zone flipper opto board that was used in some newer games that actuates the flipper assembly. 

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End Of Stroke Open
Flipper Button Pressed

 

End Of Stroke Closed
Flipper Button Not Pressed

 

TZ EOS Open Switch
TZ EOS In The Open Position
(Flipper Button Not Pressed)

 

TZ EOS Closed Postion
TZ EOS In The Closed Position
(Flipper Button Pressed)

 

TZ Flipper Opto Board
TZ Flipper Opto Board

 

 

 

 

 

 

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