Question about Sharp R-1470 Microwave Oven
We have a similar model's service manual at our site which will help you, but note that the part numbers will not be the same.
It's here: http://031d26d.namesecurehost.com/mwd//r1480_r1481_r1482_sm.pdf
If I had to bet, I would say the high voltage rectifier diode or high voltage capacitor shorted and blew the fuse.
Here are some links you or someone you know can use for test help, but read their safety warnings first:
(if it's not shorted or burned, it's probably okay)
Once you replace the fuse (15A or 20A fuse available at hardware stores, etc.), if it goes dead again almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.
If it goes dead several seconds after pressing the Start pad, that's usually a failing high-voltage transformer.
If it runs fine but won't heat, you have a bad high voltage rectifier diode and/or magnetron.
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.
You can order Sharp parts 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 Oct 02, 2010
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Posted on Jan 02, 2017
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