I have a Phillips Cdi unit with a power board that is not working. I have a working unit and verified that the broken unit works using the power board. I checked the fuses and those all have continuity, but I checked the pinouts and there is no voltage on any of the pins out to the main board. Not sure what to look at next. I haven’t replaced the caps so that could be the source of the issue, but none of them are bulging or corroded as far as I can see, though I know that could still be the issue. I guess my question is how to debug further to isolate what the issue is with the power board? I found a service manual linked here, http://icdia.co.uk/svcmanuals/cdi210b.pdf , but I’m a novice and don’t know how to read the circuit diagrams, or translate those to points to check on the physical board. I was hoping to check some other points on the board for a cold solder joint or bad capacitor, but I simply don’t know what to check.
Any advice on how to proceed or how to read the circuit diagram to know what pin on the physical board to check would be appreciated.