Question about Sharp Microwave Ovens

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Sharp KB6524PS in wall microwave--my son dove head first into it and now it won't power up, it's not locked. That doesn't suggest fuse right? What would a head on collision and no power suggest?

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  • Sharp Master
  • 3,154 Answers

If the display does light up but it wont turn on,
Broken door switch, broken in the Open position.

But if there is no display at all (no clock, for example) then look at the power supply chain (including the fuse)

Posted on Nov 13, 2019

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6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

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SOURCE: Sharp R-9H66C Microwave Convection blowing fuses

check high voltage transformer and high voltage diodes, condencer, and magnetron.,

Posted on Oct 28, 2007

Anonymous

  • 71 Answers

SOURCE: Sharp Carousel Microwave has no power

I too believe that a "protection fuse" was possibly blown. It would need to be found and get replaced. Hopefully it is just a fuse and nothing else because the way it sounds to me, the microwave may be damaged.

Good Luck!

Posted on Jun 11, 2009

Anonymous

  • 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

al_kupchella

Al Kupchella

  • 843 Answers

SOURCE: our inverter microwave stopped completely and now has no power!

Amanda, If yours is newer construction (less than 40 years) the microwave is likely to have it's own circuit breaker in the electrical panel (in the garage or basement?) so no other lights or outlets might have gone out. I have never seen a microwave that had it's own user-replaceable fuse or circuit breaker.

Posted on Feb 10, 2010

Treefrog15

Treefrog15

  • 130 Answers

SOURCE: Yesterday, my sharp carousel r-1460 went dead. I

If the 20A fuse is blowing, it is often the high voltage transformer or magnetron. If this is the case, and the microwave is not under warranty, replace it. Residential microwaves are generally considered disposable. Parts and labor are just too expensive. A magntron or transformer can cost more that half the cost of a new microwave.

Posted on Feb 25, 2010

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Hi. Our 1 1/2 year old Sharp KB6524PS Microwave Drawer: While cooking oatmeal, at start of cycle, the microwave started arcing, then smoking. Shut off at 15 seconds. Microwave-safe china used.


I expect the arcing came from the waveguide cover or aerial cover having either a crack or carbonised food particles on it.
A new cover may affect a cure if the magnetron is not damaged.

Aug 18, 2017 | Sharp Microwave Ovens

1 Answer

I have a brand new sharp kb6524ps drawer microwave and the top face plate is loose. How can I tighten it?


Is this unit 'brand new'??
Call Sharp Electronics @ 800-BE-SHARP. If you received it this way, it may be shipping damage. Contact the seller.

Oct 09, 2013 | Sharp Microwave Ovens

1 Answer

Amana aco1840ac


Test main fuse inside on the floor near where the power cord enters. There is power in the wall ... right? No substitutes on the fuse.

Mar 18, 2013 | Microwave Ovens

1 Answer

Sharp micro doesn't heat


see this causes and fix it. God bless you
Diode The high voltage diode converts the A/C power output of the transformer to D/C, doubling the voltage to nearly 5,000 volts. This high voltage powers the magnetron which emits the energy that cooks the food. If the diode burns out, a lower A/C voltage reaches the magnetron, which is not sufficient to power the magnetron. When the diode fails it is often visibly burned out. If it appears to be good, it can be tested with a volt-Ohm meter capable of testing diodes. High voltage diodes frequently fail and are one of the most common points of failure in a microwave oven.

Door Switch If the microwave does not heat, one of the door switches might be defective. Microwave ovens normally have three door switches, if any of them fail the microwave does not turn on and does not heat. Check the switches for continuity with an Ohm meter.

Magnetron If the microwave oven doesn't heat the magnetron tube might have burned out. The magnetron uses high voltage, high current DC power to generate the microwave frequency that cooks the food. If the microwave oven is turned on when it is empty this can cause the magnetron to burn out. Once it is burned out it has to be replaced, it's not repairable.
High Voltage Capacitor If the microwave doesn't heat the high voltage capacitor might be defective. The high voltage capacitor works with the high voltage diode to convert the output of the transformer to DC voltage and to double the output voltage. If the capacitor is burned out the entire high voltage circuit stops working properly. The high voltage capacitor can be checked with a special VOM meter which has a capacitance testing capability. Be aware that the high voltage capacitor can retain a charge of more than 3,000 volts and can injure or kill a person if not handled properly. Only trained technicians should perform this type of testing.

High Voltage Transformer If the microwave does not heat, the high voltage transformer might be burned out. Microwave ovens produce a very high voltage in order to power the magnetron antenna, which emits the energy that cooks the food.

Thermal Fuse If the microwave doesn't heat the thermal fuse may have blown. It can be tested for continuity. Watch our fuse testing video for more information.

Thermoprotector If the microwave doesn't heat the thermoprotector may have tripped. This is a safety device to prevent the microwave from overheating. It can be tested for continuity to see if it's blown.

Main Control Board If the microwave doesn't heat the main control board may be defective. This is not common. When a microwave doesn't heat the problem is usually within the high voltage circuit; either the high voltage capacitor, diode, transformer or magnetron.
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Oct 02, 2012 | Sharp Microwave Ovens

1 Answer

Sharp R-1880-L microwave convection oven, year built 2007. Is there a repair manual for this unit. I have power to unit, no indication of power in unit. no lights no display, I figured it was a main fuse....


Any repair on any electrical appliance should be done with the plug removed from the power socket. Microwave ovens are dangerous and has been known to kill people. Rather be safe than sorry. If a fuse is suspected, make sure to unplug first. It should be discharged as it can, even after switching off, cause a very nasty shock.

Jan 03, 2018 | Sharp R-1880LS 850 Watts Microwave Oven

1 Answer

Door won't open on my sharp r-420b microwave


That truly sucks. Microwave door laches are quite complex. A double safety mechanism is in use and the door actually locks shut. Safety, safety. We wouldn't want you to microwave your head.
If you are going to be opening the case, unplug it and let it fully discharge. The voltages in a microwave are out of control. Keep all screws (use tape) and fully reassemble when you are done. Every part of the machine is needs assembled to keep the microwaves inside.
Smile. It could have happened to all of the locks on your house -- simultaneously. Now that would really **** :o).

Jun 03, 2011 | Microwave Ovens

1 Answer

I have a Sharp Model 1460A Microwave. It quit working while warming something up yesterday. Outlet is good. No power to unit at all. No light working, etc. Is there a fuse that I can check to see if it...


Dead appliance, power on wall outlet.

YOUR SAFETY IS PARAMOUNT!

Attempt this only if you are competent.

If your appliance has absolutely no functions at all, remove it from the mains supply, remove the case and see where the mains lead goes in to the appliance and follow the cable until you find the main fuse.
ONLY USE THE SAME TYPE AND RATING OF FUSE TO REPLACE IT.
The usual cause of this fuse failure is the door switches are contaminated or sticking. Check the door switches before putting power back on to the appliance.
Hope this helps.

Feb 07, 2011 | Sharp R-1460 Microwave Oven

1 Answer

Sharp Carousel Microwave has no power


I too believe that a "protection fuse" was possibly blown. It would need to be found and get replaced. Hopefully it is just a fuse and nothing else because the way it sounds to me, the microwave may be damaged.

Good Luck!

Jun 11, 2009 | Sharp R-1870 Convection/Microwave Oven

1 Answer

NEED TO REPLACE THE WHITE PLASTIC CATCH ON NEXT TO THE CONTROL PANEL AS IT SNAPPED OFF AS MY SON SLAMMED THE DOOR


By the nature of the oven main face plate and the locking latch being attached to the safety system the replacement cost is usually higher than a replacement microwave oven.

In your case replacing the microwave with another one is more sensible. Your oven is an obscure model as it is, I'd suggest a sharp brand.

Regards,
Worldvet

May 15, 2008 | Zanussi ZM24STX 900 Watts Microwave Oven

2 Answers

Sharp R-1450 Microwave Oven


The most common suspect here is a shorted high voltage capacitor, since you say it blew the fuse right after Start, but I would certainly suggest checking the door switches and door switch mounts first. Just be sure you installed the right fuse. It would be a The switch mounts seem to break at about this point in the life of these models. If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info (as well as a text file which helps in diagnosing and repairing door switch problems) at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk You can find helpful exploded view diagrams and order parts by entering your model number here: http://www3.sears.com (the three is correct)

Jun 04, 2007 | Sharp R-202EW Microwave Oven

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