Question about Sharp Microwave Ovens

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All power and lights are out on my Sharp R-9310A microwave. Does this microwave have a fuse that could have caused the problem or is it time for a new microwave?

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Posted on Jan 02, 2017

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MicrowaveSvc
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SOURCE: sharp carousel non functional overhead light

We see (and repair) this a lot. The problem is on the control panel, which we regularly repair nationwide by mail for $39.95 postpaid in about a week.

At our Web site, you can get details of our service, plus we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.

This can often also affect the exhaust fan operation, too. The lights and fan can be inoperable or stuck on too.

Feel free to contact me directly (and please remind me of your full model number) for more information & help.

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

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com

Posted on Jan 01, 2009

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  • 49 Answers

SOURCE: why did my sharp microwave lose all power

remove cover and check small fuse, if fuse is bad it ussually is caused by a failed door switch, hope this helps

Posted on Jan 31, 2010

heatman101
  • 43501 Answers

SOURCE: hello- problem with sharp microwave kb-6014LS boiling

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

Microwave Oven Basic Troubleshooting Tips

heatman101

Posted on Aug 14, 2011

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2 Answers

What causes microwave to blow new fuse?


The only thing inside a microwave oven that draws enough current to blow a fuse is the magnetron that generates the microwaves to provide the cooking power. Based on the age of the unit (approx 15 years) it is most likely best to just replace it as repairs at that level are not cost effective. Newer units cook better and faster using less power these days.

Jul 02, 2015 | Sharp Microwave Ovens

1 Answer

This microwave is about 5 years old. It suddenly stopped working. No power, no lights coming on, just shut off completely. Can it be fixed?


Yes it can be fixed! the main fuse in the microwave has blown, this is usually caused by a defective door switch, but on occasion it is just the fuse.

Feb 11, 2011 | Sharp R305KS Microwave Oven

1 Answer

Why would the high voltage capacitor go bad?


Hi and welcome to FixYa. I am Kelly. High voltage capacitors can and do fail when a microwave is used for long periods of operation, when the unit is operated with no internal load and sometimes for no reason at all other than the capacitor had an internal failure such as corrosion or a break down of the metal strips inside of it where the strips can make contact with the the case. I have been working on microwaves since the 70's and often there is no apparent reason for the failure of the HV cap.. They just sometimes fail.
However...... there is also a power diode in the microwave that is connected directly to one terminal of the HV Cap. If the power diode has failed it can cause subsequent failure of the HV Cap. The Sharp Power diodes can be found here: http://www.repairclinic.com/Sharp-Microwave-Parts?s=t-FH-DZA119WRKZ-%3d%3db113a6c41

You use and ohm meter on resistance to check the diode AFTER removing the terminal of the diode from the capacitor. NOTE: the capacitor must be shorted across the terminals at least 3 times with a screwdriver while holding the handle only to prevent a horrible shock.
Once the diode terminal is disconnected from the HV Cap read resistance in BOTH directions by reversing the test leads on the terminals of the diode. One direction will read resistance and the other direction it will read open / infinity. Any other reading is a failed diode.

You check the capacitor using an analog (scaled vs digital display) ohm meter on R X 1,000 or R X 10,000 and watch for a jump on the meter just as you touch the terminals EACH time you reverse the leads. No jump or... steady resistance = bad Cap.

Sharp Capacitors can be found here:
http://www.repairclinic.com/Sharp-Microwave-Parts?s=t-FH-DZA119WRKZ-%3d%3db113a6c12

Just note that either a CAP or Diode failure can cause the main fuse to blow at the end of the power cord in the fuse holder.

Fuses are normally either 15 or 20 A Slo-Blo fuses and can be found here:
http://www.repairclinic.com/Sharp-Microwave-Parts?s=t-FH-DZA119WRKZ-%3d%3db113a6c44

Thanks for choosing FixYa

Kelly

Sep 29, 2010 | Sharp Dial Microwave R-21LCF Microwave...

1 Answer

My Sharp R3A53 microwave oven has gone dead. Even the light does not come on. What is the likely cause?


Most cases where there's no power to a Sharp M/W means that the High Voltage fuse may have failed.

May 20, 2010 | Microwave Ovens

1 Answer

Why did my sharp microwave lose all power


remove cover and check small fuse, if fuse is bad it ussually is caused by a failed door switch, hope this helps

Jan 31, 2010 | Sharp R-930AK Convection/Microwave Oven

1 Answer

My sharp R1650 has no power including light and vent


Thjere is a large Ceramic fuse on top of the chassis The outer cover has to be removed to access it The cost of replacement is about $20-30. But it would be better to know WHY this blew. replacing it may cause it to fail again immediately if there is a short circuit somewhere in the unit

Aug 15, 2009 | Sharp R-1460 Microwave Oven

1 Answer

Dead replaced fuse now makes loud noise


Yes that noise is causing your fuse to blow. Machine gun sound sounds like the High Voltage Capacitor or High voltage diode is bad. (Loud humming sound is usually a bad magnetron or bad power transformer). Most of these parts are inexpensive, except for the magnetron. But most of the repair bill is most likely going to be for labor.

Based on your model, it looks like an over the range microwave. And to fix any of these problems require the removal of the microwave from the wall. So its up to you if you want to deal with that hassle. But you also have to consider that you'll probably have a hard time trying to find a new microwave that will fit.

Mar 25, 2008 | Sharp R-1480 Microwave Oven

2 Answers

Sharp R-1505 microwave


The power fuse open , if open replace it don't make jumper it b
cause fire .
the power transformer builtin fuse open/
The door micro switch open /need to replace.

Jan 03, 2008 | Sharp R-1505 Microwave Oven

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