(Topic ID: 224902)

WOZ problem

By DnDPins

1 year ago

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  • 10 posts
  • 4 Pinsiders participating
  • Latest reply 1 year ago by DCFAN
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#4 1 year ago

Make sure the opto connectors are connected to the main opto board under the playfield.

#10 1 year ago
Quoted from DnDPins:

Unfortunately, using the unused port on either opto board did not work.
It seems that my troubleshooting has confirmed the problem is not the Optos, or cables to the optos or the opto boards. Therefore I guess all that is left is the connection from the MPU to each opto board. Interestingly, the problem is on the same port of both opto boards under the playfield.
1) Plugged connector of failing opto to unused port of opto board and while it registers when plugged in, it does not resolve the problem
2) Plugging in the connector of a working opto into the port of the failing one does not register anything at all on the switch matrix
3) Plugging in a spare known good opto on the failing port does not register. (it does on a working port)
4) Swapping a new Opto board on either side results in the same exact conditions
5) Each switch in the same row have been tested as expected
Any ideas of where to go from here?

It may help us help you if you post a picture of the main opto board under the playfield.

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