Question about Sharp R-520LK Microwave Oven

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Noisy magnatron Whenever the magnatron is operating, a very noticeable buzzing, vibration appears to emanate from the magnatron housing. It has become noticeably louder over the last few months. The unit still appears to cook properly but very noisily. Any ideas what could be cause the buzzing, vibration?

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  • mikek9 Apr 26, 2008

    this unit is still under warrenty . it has been very noisy since we got it 5/14/07.
    now thier is no power at all. when you push the start button the light and timer come on but no power.

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  • Sharp Master
  • 8,865 Answers

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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