Stan, thinking I would try to duplicate the board shown above... I'm stuck trying to trace out the wiring of the example board above. Found a better picture here. It has a magnified view for close ups and appears to be the same board.
The problem is in following the board's traces to the components? The pinouts of the LTV-8141 and PC817 appear to be the same from their data sheets. So here's what it looks like to me so far, but it also doesn't look to be correct either? I think the whole thing is in need of a few corrections. My PCB tracing is about on the same level as my circuit designs, both still needing a lot more work!
