Shadow, The
Bally, 1994You're currently viewing posts by Pinsider chrishibler.
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Post a picture of the manual page that contains the schematic for the Opto processing board. I have a theory.
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Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
http://www.PinWiki.com/ - The new place for pinball repair info
Thanks.
Let's isolate the issue to the MPU or some other component (opto processing board).
Read here first: https://www.pinwiki.com/wiki/index.php?title=Williams_WPC#Switch_Matrix_Problems
In particular, jumper J207/3,4 to J209/1,2, as described in the PinWiki (while in switch test).
If jumpering those pins indicates a switch closure, then the issue is not on the MPU, and is probably on your 10-opto board. Only a logic probe would be able to help us then.
Please report back.
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Chris Hibler - CARGPB #31
http://www.ChrisHiblerPinball.com/Contact
http://www.PinWiki.com - The Place to go for Pinball Repair Info
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