Question about Sharp Microwave Ovens

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Sharp R-520KS has no power. There is no display.

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  • Jacqueline P May 10, 2009

    Thank you very much. Microwave is working now. Solution also worked for my mom's unit also.

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  • Sharp Master
  • 8,858 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 Adobe Reader to view or print it.

There is a main fuse on the filter board near the rear, a cavity themal cutout an top of the chassis, and a thermal cutout on the magnetron.

All these will interrupt power if open.

The best place to order Sharp parts is Tritronics.

Please write back if you need further help.

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

Posted on Sep 01, 2008

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1 Answer

Sharp R-520KS - When the door is opened, the light and fan comes on and the carousel rotates. I don't know if microwaves are emitted. How can I stop the fan from coming on and the carousel from...


You can tell if microwaves are being emitted if you get warm standing in front of it (seriously). But I wouldn't recommend that unless you want to cook yourself.

First thing that comes to mind is the door interlocks are out of adjustment or bad. Home microwave ovens are not supposed to operate like that. Some commercial models start the fan right away and run it after the cooking cycle is completed but I've never heard of a consumer model that does that.

Find your closest servicer here and have them take a look.

Sep 04, 2011 | Sharp R-520KS Microwave Oven

1 Answer

Everything works. Time, fan, turntable, light. It


Magnetron and accompanying high voltage diode are usually to blame. Everything else works but the magnetron isn't resonating (providing the proper energy to excite your water molecules).
An appliance repairman can change it for you (typically $180) or you can get a new microwave.

Apr 12, 2011 | Sharp R-520KS Microwave Oven

1 Answer

Fuse size for sharp mircowave r 520ks


The fuse will be a 20amp ceramic. The fuse should be available at hardware stores, Radio Shack.
If the fuse is blown, there is a very good chance you have another problem, possibly a bad or misaligned door switch, shorted capacitor. Replace the fuse, if it blows again you will have to figure out why. Door switches are the most common reason for the fuse to blow.

Feb 02, 2011 | Sharp R-520KS Microwave Oven

1 Answer

THE DOOR OPENER SEEMS TO HAVE A DISCONNECT AND HAS TO BE PRESSED EVER SO SLIGHTLY FOR THE MICROWAVE TO GO ON. CAN I FIX THIS?


There are three microswitches in the door latch assembly. One of them has failed (most often the lower one). With some mechanical know-how one can easily replace the bad switch with just a phillips screwdriver. There are two normally-open switches, and one normally-closed switch. They can be purchased off of ebay for about $10, and changed in 15 minutes.

Jan 11, 2011 | Sharp R-520KS Microwave Oven

1 Answer

I have a Sharp Microwave R-520 KS. And it stopped working. I thought it was due to a latch problem. But now I am not sure. I took it apart -- and the latching and microswitches seemed to be working...


Did you disconnect and test the three latch assembly microswitches with a multimeter or continuity tester? The top and bottom switch are normally-open, and the middle switch normally-closed. The lower switch seems to be the one that takes a beating and most often fails. It should be an Omron D3V-16G-3C25 and can be found on eBay for $10, or via an electronic parts supplier.

Nov 22, 2010 | Sharp R-520KS Microwave Oven

1 Answer

I am looking for a bottom door switch for my Sharp R-520KS microwave. I can not locate one. I have also tried the Sharp.partstore.com site. could you locate one for me? thanks lisa


It should be an Omron D3V-16G-3C25, you can google that number and find a few electronic parts suppliers who sell them in a quantity of one. Likely the cheapest route is to buy off of eBay where I see them for $10 shipped.

Jun 25, 2010 | Sharp R-520KS Microwave Oven

1 Answer

Replace door latch on sharp microwave R-520KS


Sorry but its probably not worth it - consider cost of the part + cost of labour and you could probably buy a brand new machine.
Otherwise look out for a used machine from your local 2nd hand store, garage sale, refuse tip etc and get the part from that and do it yourself - MAKE SURE ITS UNPLUGGED.

Jun 08, 2010 | Sharp R-520KS Microwave Oven

1 Answer

SHARP Microwave- doesn't rotate, fan does not come on, oven light comes on, timer works


Hi,
Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Microwave Oven Basic Troubleshooting Tips
http://www.fixya.com/support/r5508031-microwave_oven_basic_troubleshooting

heatman101

Dec 07, 2009 | Sharp R-520KS Microwave Oven

1 Answer

One of the number buttons on my microwave doesn't work


Most likely needs a new membrane switch.

Part number FUNTKB445/KIT description "KEY SHEET", part is backordered, lists for $13.18.

Find Sharp service centers here.

Mar 09, 2009 | Sharp R-520KS Microwave Oven

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