Quoted from jetmechinnc:
OK, I got my game all back together again with new ramps and time expander cover. The thicker plastics on the new ramps make them a little more pissed off for sure going back to the original location.
My only error now is the opto switch 33 for the R/H center ramp. I don't think I was getting that error prior to disassembly and the opto board is new. I did take a que tip and attempted to clean them first. My questions is if the new ramp isn't just perfect with alignment, would this give me an open on those optos? Not sure on how sensitive they are, such as possible minor edge of hole is at the light sensor, but the ramp is clear so wouldn't the beam go through??
May be able to take off the inboard one and if I have enough wire get it closer to the other one, just to see if they work, or maybe they just decided to die? Kind of a bummer since this means I have to take off the the other ramp as well and that one was not happy going in.
Could just be a weak connection at the plug in cable..
Opto's can be a little sensitive to alignment, and edges can deflect light in odd ways.
Its best to have good clean openings for them to shine thru.
If you have mirrors, you might have to flip the optos around due to reflection, optos are actually quite bright. Have the transmitter shoot towards the inside of the game etc.
Test the opto pair before installing them onto the game.
After 30 years, Its probably good to just replace all of the opto's in the game.
Thats what I did, along with every single switch, they were driving me crazy with intermittent failures.