Whirlpool microwave failed with shorted transformer.
I found another (older but same power) Whirlpool in working order but with a component in it that I've never seen in any other oven:
In addition to the usual capacitor/diode voltage doubler arrangement, this unit has a second (double-)diode across the capacitor terminals. It is the same shape/size/color as the other diode but has a symbol printed on it that looks like two diodes connected cathode to cathode (and the anodes going to the cap. terminals) with one of the two diode symbols being smaller than the other (1.5kV PRV) and one being 6kV PRV. The part number is 2X062H/SK5822 and it's listed as a protection diode.
Why would my broken oven (and others that I have worked on) not have this component while the oven that I scrounged the transformer from have it?
I found another (older but same power) Whirlpool in working order but with a component in it that I've never seen in any other oven:
In addition to the usual capacitor/diode voltage doubler arrangement, this unit has a second (double-)diode across the capacitor terminals. It is the same shape/size/color as the other diode but has a symbol printed on it that looks like two diodes connected cathode to cathode (and the anodes going to the cap. terminals) with one of the two diode symbols being smaller than the other (1.5kV PRV) and one being 6kV PRV. The part number is 2X062H/SK5822 and it's listed as a protection diode.
Why would my broken oven (and others that I have worked on) not have this component while the oven that I scrounged the transformer from have it?