Wood River, IL
Lost U20 and U23 on my MM. I replaced them but U20 blows within a minute or so.
Disconnected J206 and started testing the plug for voltage and found 12V on the Green-White wire which I assume is not supposed to be there.
Chased the wire to all the switches (Moat Enter, Trolls, and top lanes) and had voltage at all of the switches. Disconnecting J3 at the 10-Opto board eliminated the voltage on the white/green wire. The opto board is putting voltage on J3-3 which I also assume is not right.
I'm getting ready to pull the Opto board and I assume I have a problem with one of the LM339's?
