The "height" of the optos is shorter than the originals and with the interrupters slightly bent from years of use, they don't reliably block the beams at rest, even with brand new interrupters. Also, the bigger …

Note: I quoted "more sensitive" because that's a generalization of the part's unique behavior. I was wondering why the TZ clock needed this unique opto and whether all optos in Williams games …

Jun 1, 2025 · Thing, the Bookcase, and all the Optos fail in self-test mode. Everything else works fine, and the game plays without the Bookcase and Thing. A few years ago, I had similar issues with just …

I have been reading about some issues I am having and it seems like on a few occasions the solution was to clean the optos and that fixed their issue. The only problem is that no one ever said how to …

WPC Optos - General and Slugfest By EddiePi 2 years ago 2 posts 1 Pinsider participating Latest reply 2 years ago by EddiePi No one calls this topic a favorite

When you say opto boards were replaced are you speaking of 520-5239-01 or the optos on the ramp? Have you tried reflowing solder or replacing the boards with the actual optos on them that are …

Seems odd that Marcos would be selling the wrong optos and not be aware of it being as these boards have to be purchased on a regular basis. Bear in mind that the boards from Marcos are complete …

The optos show open in test. [ (1-2-3-4) 53-54-55-56] I can flag the bumper lane opto and it shows closed. I checked continuity for the switches, J 206-5 Green-Black to shooter lane (51) with continuity …

Also check Switches 88, 84 that are the other lock optos. Testing this can be quite a pain because it's all underneath the ramps, but that's what needs to be done. Finally, machines this age are having a …

It sounds like you determined the optos are bad. Stern optos used to be a different part for transmitter and receiver. Now they use the same physical part for both. Because of this, you should replace the …