Last word for the night, after removing the defective diode I measured a the frequency and duty cycle at the two terminals (boxed in red) with respect to the DC GND (circled in red). I observed a Duty Cycle of 60Hz with intermittent spikes +80Hz and and a duty cycle of 29.x% wherein the X fluctuates.
I suspect the switching circuit is operating normally - though the spikes are of concern. I will attempt to reinstall the resistor in the area and see if it affects the stability of the switching circuit tomorrow. Suggestions are welcome.
I suspect the switching circuit is operating normally - though the spikes are of concern. I will attempt to reinstall the resistor in the area and see if it affects the stability of the switching circuit tomorrow. Suggestions are welcome.