📖 Glossary, Part
What is a high voltage diode?
Works with the capacitor to double voltage for the magnetron. A shorted one causes a loud hum and no heat.
The diode and capacitor together roughly double the transformer’s output to the tens of thousands of volts the magnetron needs. When the diode shorts, the transformer labors into the fault and produces a distinctive loud hum with no heating, often taking the line fuse with it. It is one of the cheapest parts in the machine and one of the more common no heat causes, but it sits next to the capacitor, so it is not owner serviceable.
Where you’ll meet it
Repairs that involve high voltage diode
Related terms
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