Question about Sharp Microwave Ovens

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My Sharp carousel model R-306LW "popped" right after I pressed the start button.

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  • funtimes70x7 Oct 23, 2008

    I put in a plate to reheat some leftovers and closed the door. I then pressed 2 0 0 and the "Start" button. Then a "pop" sound happened and everything is off. Nothing is showing and the light doesn't come on when you open the door. I have tried other appliances in the outlet and they work.

  • funtimes70x7 Nov 20, 2008

    MicrowaveSvc,

    Thanks for the manual. I will be able to test the fuse and the capacitor now. I will let you know the results. Thank you again!

  • William Miller
    William Miller May 11, 2010

    Did the fuse blow?

    Is it dead (meaning no display and no light when you open the door)?

    Or does it run but just not heat now?


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  • Sharp Master
  • 8,820 Answers

We have the service manual for this model and have uploaded it to our site here to help you.

You will need the free Acrobat Reader to view or print it in case you don't have it already.

I would bet that the high voltage capacitor shorted and took out the fuse. It may possibly be the high voltage rectifier diode, but I bet it's not.

Here are some additional 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/cap_test.html
http://www.gallawa.com/microtech/diode.html (if it is NOT shorted, it's probably fine)

The best place to order Sharp parts is Tritronics.

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

Posted on Oct 24, 2008

  • William Miller
    William Miller Nov 21, 2008


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

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