Reading the schematics, I bring you some ideas, correct me if i'm wrong:
- I must measure the voltage drop across R1 (one of the power resistors in the plugin) and that will reveal the current sent to the YO coil, isn't it?
- The black heatsink on A9 board it's always hot. I think it is hotter than it should be, should check Q1 too? Maybe the transistor is shorted and it doesn't send sufficient current to drive the YO. What you think?
Regards,
Ruben
RubenRubio
