20 Most Recent
Sharp R-340 Microwave Oven Questions & Answers
TURNTABLE SUPPORT BROKEN AND WHERE TO PURCHASE?
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The carousel works and the lights are on. The
It sounds like the magnetron may have
either failed or is not being supplied with the extremely high
voltage required to run it.
YOUR
SAFETY IS PARAMOUNT
This is a job for a professional but if
you are safety clued up, here's instruction.
Make sure the
!!!!capacitor is discharged!!!!! before attempting any
sort of repair.
Check the door interlock switches first then the
high voltage diode with either an AVO model 8 or moving coil meter on
high resistance range for short circuit, (DVM's won't show the
fault!), the capacitor can fail and go short circuit, the feed fuse
on the primary of the high voltage transformer and then finally, the
magnetron is best checked by substitution.
Hope that helps.
Load
test.
A
simple safety test.
Place 1/2 litre of water in a glass container.
Measure the temperature of the water.
Place in microwave and heat
on full power for 1minute.
Measure the temperature after it has
stood for 1minute.
If the temperature difference is more than 9
degrees Celcuis the magnetron is working and producing about 700Watts
of heat.
If your microwave is labelled with 900 or 1000Watts. That
is about right.
If the temperature is less then the magnetron is
not working properly and may need replacing.
This
a only a rough guide and any doubts you should consult an authorised
service agent.
My miroware is not heating
erwer
Sorry to read about your problem.
It seems your have a general failure in the power control or switch failure on the unit. if your unit has power, and things lite. it is more likely you have a control/switch problem,
since you can replace your unit for under $100.00 a service call would not be worth it.
I tried to help you. Please help me and Rate/Vote on my response, thanks and good luck
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My sharp r-340f works for
The magnetron may have either failed or
is not being supplied with the extremely high voltage required to run
it.
Make sure the !!!!capacitor is discharged!!!!!
before attempting any sort of repair.
Check the door interlock
switches first then the high voltage diode with either an AVO model 8
on high resistance range for short circuit, the feed fuse on the
primary of the high voltage transformer and then finally, the
magnetron is best checked by substitution.
Hope that helps.
Hello, I have a model
The fuse you are referring to is usually the line fuse. If it were blown, the microwave oven would be completely dead. Since you HAVE power and the turn table, fan and lights all work, the line is not the problem.
If everything works, but the microwave oven does not heat, this is most commonly caused by a failed magnetron or internal thrmostat. The magnetron is essentially, the heart of the oven that produces the RF energy that is used to heat your food. In order to replace a defective magnetron, you will need to consider the following:
1. You will need to uninstall the oven from over the range in order to replace the part (you will need to do this anyway, if you decide to buy a replacement oven).
2. Ensure the oven is UNPLUGGED before servicing anything inside the cabinet and remove the exterior case in order to access the magnetron. There are several websites that you can use that illustrate how the oven is assembled:
searspartsdirect.com
pcappliancerepair.com
appliancepartspros.com
NOTE: If you've never repaired an appliance on your own before, a microwave oven is usually not a recommended appliance to start with. Some models can be rather involved in taking apart.
If the model number you posted this question under is correct, the magnetron replacement part number is 10794402.
NOTE: This model also has an internal thermal fuse mounted on the magnetron that, if tripped, could give you the same symptoms. The thermal fuse acts as a fuse if the oven cavity or magnetron overheats. The part number is 59001951. You will need to remove the thermal fuse from the oven and take a resistance check across the component terminals to determine if it is good or not. A low resistance reading indicates a good thermostat. An infinite reading, indicates a blown thermostat and needs to be replaced.
I would recommend you check the thermal fuse, first as the replacement cost is much less than the magnetron.
Review the parts illustrations at the recommended websites to see if this is something that you may be able easily take apart and reassemble.
If you have any questions, please post back and let me know. I hope you find this information helpful.
CAUTION: DO NOT operate a microwave oven with the exterior cover off. The voltage inside the High Voltage network where the magnetron is installed can exceed 3,000 volts!
How do I stop the beep when food is ready (it
I too have Sharp microwave that constantly beeps at approximately one minute intervals if the food you have been heating isn't removed. It is loud, persistent and extremely annoying. I've opened the machine to try and find the loud speaker but cannot find it (it could be built in to the circuitry?). Any help on this would be appreciated. It's a very unfortunate design flaw on what is otherwise a very good and easy to use microwave.
I need back light for
repairclinic.com has all parts, just search with your model number
Let me know how this works out
Benjamin
Control Panel Touch Screen Goes Blank
This is a problem with the control panel assembly, which we commonly repair for $32.50.
Feel free to e-mail me at _ for more information or visit _ for full details.
Sharp undercounter unit
You probably have a broken "door open lever".
If you or someone you know decide to work on it, we have *critical* safety, disassembly, and troubleshooting info at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk
You can probably find an exploded view by entering your FULL model number here: http://www.searspartsdirect.com
You can order Sharp parts there or from Tritronics at http://www.wehaveparts.com
We're happy to help and we appreciate your thoughtful rating of our answer.
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