Question about Sharp R-1405 / R-140 Microwave Oven

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Microwave possible blown fuse??

I have a Sharp Over the stove microwave Model R-1480 manufactured July 2001. This microwave is in my motorhome & I hooked up my motorhome by mistake to 220 volt and now I have a T.V. & microwave that does not work and there is power to the receptacles?? After taking this "attack of dumb" I reset breakers and GFI receptacles and everything else started working but these two items. I am hoping there are fuses in both of these however I don't know where they are located and if indeed they even have fuses??

Thanks so much in advance for your input, it is appreciated.


Lonnie McIntyre

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  • Lonnie McIntyre Dec 06, 2007

    Thank you so much for your help, it is apprerciated. I did find the fuse in the microwave but unfortunately the fuse is good. I have 120 volts on both sides of the fuse. So I am now stumped as to what the problem may be. This over-the-range microwave is in a motor home and I think they built the coach around it and I can't follow the wires properly without removing an additional panel which I can not get access to the screws without removing the microwave?? Go figure.

    However on the bright side. I did take out the TV to find a blown fuse. I just have to find out where I can purchase one? I am going to go to Radio Shack and see what they have. Again, Thank you so much for your input I found it very helpful.

    Oh by the way, I am located in Homosassa Florida.





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If you still have this oven and need repair, we can do it for $39.95 nationwide or about $25 more if it needs a new transformer.

We repair these and various other models all the time with the same situation for RV owners & dealers across the country.

We have full details, plus *critical* safety, disassembly, and troubleshooting info at our site. You'll find a link to our site in our listing here on FixYa:

We're happy to help and we appreciate your thoughtful rating of our answer.

Posted on Mar 20, 2008

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Hi Lonnie,

Yes, both of them should have a fuse or two in the internal power adapter. If you open them up, you should be able to find it fairly easy (start tracing from where the AC power line comes in on the board). Make sure you unplug them and leave them unplugged for a good time

Once you find the fuses, you can take them to a local electronic parts outlet for identification, testing, and replacement. Most electronics places will have a meter on hand and be happy to do this for you for free.

Since you didn't give a city location for yourself, I'm afraid I can't offer a local store recommendation.

As always, when working on a TV, be VERY careful to make sure that the capacitors are discharged. See this faq:

Posted on Dec 05, 2007

  • Michael Ahlf Dec 07, 2007

    You're welcome, you ought to be able to find an electronic parts outlet fairly close by.

    As for the microwave, visually check capacitors for leakage as your next step. Unfortunately, if it's not that, it is probably cheaper (and safer) to replace the microwave entirely.



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