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 …

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 …

Corvette switch matrix + optos By cait001 10 years ago 10 posts 2 Pinsiders participating Latest reply 10 years ago by cait001 Topic is favorited by 2 Pinsiders

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 …

Oct 2, 2025 · Hi, I replaced the cpu board in my # TZ. Around the same time all clock optos on my stopped working. They all register as closed. Have verified power on the clock and expansion board. …

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 …

The other two faulty switches are optos (one for the ball trough, the other for the car). I removed and cleaned the ball trough optos, including 31, but to no avail. I will look again, as well as try to eliminate …

Aug 14, 2024 · The optos that don't meet this specification don't work reliably in a Twilight Zone clock. Dumbass makes a replacement clock board, and he (like the best replacement clock board …

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 …

I no longer own a Stern Star Trek, but I had to change out the Vengeance optos on my Premium about a year and a half ago. As far as I recall, I didn't have to remove any ramps - just the Vengeance ship …