How To Troubleshoot Magnetron

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magnetron

How To Troubleshoot Magnetron

How To Troubleshoot Magnetron

Magnetron is designed to generate microwaves. The physics of the magnetron is quite complicated. It is using strong external magnetic field to direct the flow of electrons in a resonant circular cavity developing tens and hundreds of watts at frequencies around 2.45 GHz. Magnetron can be tested on continuity only. The volume resistance of the terminals should be less than 1Ω. The insulation resistance between the two terminals and the housing should be infinite.

It may also be possible to detect faulty magnetron when it starts making loud humming noises. A magnetron with a short between the filament (cathode and anode) is likely to cause a loud hum when the cook cycle is initiated. Evidence of arcing (burned spots around ventilation holes in base or a burnt odor) usually indicates a bad magnetron as well. Melting or other damage to the antenna might be the result of arcing due to problems in the oven cavity or waveguide, perhaps operating microwave oven with nothing inside the oven.

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Disclaimer: The Technical Reference Materials (hereinafter “Materials”) at this site are intended for viewing and use by qualified appliance service technicians. If you do not possess sufficient mechanical and electrical skills and the ability to comprehend, understand and follow all safety warnings and cautions on the product in these Materials, do not attempt to undertake the repairs that are depicted in these Materials. MD Appliance LLC disclaims any and all liability, to the fullest extent permitted by law, arising out of your use of the site and Materials.

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