As the titles says, when I hit either the eyeball standup or standup 1 all of the switches on column 7 activate. If I trigger one of the optos only the expected opto activates. My feeling is that there is an issue with the "7-opto switch board assembly", but I'd like to get some second opinions. Here is what I have tried that makes me think it's that board:
- un-plugged J207 and J205 from the CPU board and used jumpers to check all of the rows and columns. The error didn't show up when doing this so I don't think it's on the board.
- checked the diodes on the standups. They are both on in the right direction from what I can tell with the unbanded side connected to the same tab as the white wires. I also checked the voltages (without disconnecting the diodes) and the both read at around 560 (not sure of the units on my meter).
- un-plugged the trough and 7-opto boards and checked the switches. When I did this the column did not activate. Plugged the trough back in and the column still worked correctly. As soon as I plug the 7-opto board back in the issue comes back.
- when I check the
Could it be on the 7-opto board itself, or could it be one of the optos? The fact that all of the other optos seems to be working properly is confusing me.
Here is a picture of the board itself. With the flash I can what looks like a burnt spot on the underside of the playfield, but I have no idea how long that has been there. I have only had this pin for a couple months and before that who knows what happened to it.