Sharp Microwave Ovens - Recent Questions, Troubleshooting & Support


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

Sharp Dial... | Answered on May 13, 2020


possibly has to be done cooking . cant be sure as never owned a Sharp . wifey worked for sears so that was what we bought

Sharp Microwave... | Answered on May 05, 2020


could be a fuse or burnt out bulb

Sharp Microwave... | Answered on Apr 07, 2020


I searched using https://www.google.com but did not locate an instruction manual for that model Sharp microwave oven.

Recipe at the link below suggests adding extra sugar before baking.

https://www.allrecipes.com/recipe/140772/easy-microwave-chocolate-cake/?_ga=2.211667349.160497590.1579435247-959462057.1579435247

Sharp Microwave... | Answered on Jan 19, 2020


You can try and unplug it for 5 minutes, push the on button to make sure it's completely discharged. Then plug it in. If it does the same thing, it's toast. Getting it repaired will cost about the same as a new one on sale.

Sharp Microwave... | Answered on Jan 11, 2020


There probably is a fuse inside but replacement depends upon your degree of comfort with disassembly while maintaining awareness of the dangerous voltages lurking inside.

Sharp Insight... | Answered on Jan 08, 2020


Hi, there are two ways to this problem.

If it is a simple counter to microwave oven, then you can remove the cabinet, open the door from inside of the microwave to diagnose the problem...

But if it is an over the range model, then it is more complicated and you probably have to call a qualified technician to fix it.

In any way replacement parts, most likely, have to be ordered from Sharp only....

Take care

Sharp KB-6015KS... | Answered on Dec 07, 2019


GO BUY A NEW UNIT YOU WILL NOT FIND PARTS FOR A 39 YEAR OLD MICROWAVE

Sharp Microwave... | Answered on Nov 21, 2019


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)

Sharp Microwave... | Answered on Nov 13, 2019


Something must have spilled into the mechanism and dried there. You'll need to access and clean it out.

Sharp Microwave... | Answered on Oct 26, 2019

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