Question about Sharp R-520LK Microwave Oven
First of all, if you press against the right side of the outer cover of the oven, does that lessen the noise? If so, it may be that a rubber cushion on the side of the HV transformer has fallen off.
If it had that hum but was not heating, I would first check the HV rectifier diode.
But since it's cooking, I would say your magnetron is on the way out.
Unless the warranty is about to expire, I'd continue to use it and watch and wait.
Posted on Apr 08, 2008
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Posted on Jan 02, 2017
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