I just finished a long restoration project on the Flintstones. After the first boot up, it seemed to play fine. Then, on the second game, it started shooting out balls over and over. After a reboot, I got the F115 F116 J112 an 12V to opto error.

I have been reading about this and the various things that could cause it. Before I proceed, however, I have a question about the voltage readings I am getting from the power driver board:

The board is a brand new Rottendog:

TP = Reading (V)
12VP = 18.85
5V = 6.57
50V = 95 (!)
12VD= 15.8
18V = 24
20V = 29

Certainly this should not be the case. I would assume I need to address this problem first. Would this be a bad board, or could I have hooked something up incorrectly?

The coindoor buttons have also quit responding, which I fear could mean I have blown up a chip or two.

As always, thank you very much for the help!

MK

After further reading -

I did not test the V under load. Perhaps these readings aren't as bad as I thought?

It seems that resetting the ribbon cable to the CPU board has solved the problem

I would still like to know if those voltages are OK while not under load.

Thanks!

Thanks for the info. I feel much better