What Does A Microwave Diode Look Like

How to test a microwave high voltage diode with a multimeter.

What does a microwave diode look like.

This could be caused by a problem with the high voltage diode which helps to power the magnetron. Hull in schenectady new york. The magnetron operates as an oscillator which is a device that generates oscillatory electric currents or voltages by nonmechanical means. Reverse the meter probes and measure resistance while touching the positive probe to the cathode and the negative probe to the anode.

The positive side won t have a band and will have a bit that goes to the capacitor. We have manuals guides and of course parts for common ms19m8000as aa 0000 problems. Differences in microwave make and model account for this large range in resistance readings. According to edison tech center the cavity magnetron is the central part of a microwave the concept of the magnetron was invented in the 30s by dr.

Look for the marking a colored stripe on the diode or resistor that indicates which way the current flows. The negative side is the cathode side and the positive side is the anode side. How to diagnose microwave not cooking issues. During positive half cycle capacitor charges to the peak of the secondary voltage.

The parallel resistance cross capacitor is bleeder resistor. Your microwave may turn on but not heat up. It looks like voltage doubler circuit formed by capacitor and diode. The power flows from the end without the stripe to the end with the stripe.

Diodes are rated for the wattage or amperage that they will be allow to pass or breakdown safely within the component. Locate and remove your high voltage diode to test it for continuity. Replacing your microwave s diodes. Unplug your microwave before beginning this inspection.

During negative half cycle diode is out of picture. It is not many diodes in series as you suggest. A normal diode that is a non defective diode will read anywhere from 50 000 to 200 000 ohms. Pretty much like a fuse.

Testing the diode is done just like any lower voltage diode infinite resistance in one direction low resistance when you reverse the ohmmeter test leads less than 10 ohms.