Question about Sharp R-1481B Microwave Oven

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I have a SHArp microwave model #R-1481. it stopped working last week. It turns on and rotates inside but sounds differnt and has a smell as it is on and is not heating anything up. Its 10yrs old I believe. Is it worth fixing or even fixable?

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We have the service manual for this model and have uploaded it for you here.

A loud buzz, hum, or groan is usually a shorted high voltage rectifier diode, but a sound like gurgling into an empty coffee mug is one symptom of a failed magnetron, and yet the mag can be bad without that sound.


We have a sound clip of what a microwave should sound like when the cooling fan and high voltage section are working.

Here are some links you or someone you know can use (in order given) for test help, but read the safety warnings first:

http://www.gallawa.com/microtech/diode.html
(if it is NOT shorted or burned looking, it's probably fine)


http://www.gallawa.com/microtech/mag_test.html
(continuity can be good even though mag is bad!)


http://www.gallawa.com/microtech/xformer.html

You can order Sharp from Encompass here or you can call them toll-free at 866-779-5835.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Posted on Aug 23, 2010

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