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Sharp R3A52 worked OK until low voltage yesterday. Now, cannot get settings to work. Reprogrammable? If so, how to do it? Thank you.

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The power problem caused by the cook cycle starting is resulting in changes to the settings or else the microcontroller is not interpreting them properly. This may be due to a faulty part of bad connections in the controller or elsewhere. As with intermittent problems, a thorough search for loose ground and other connections and bad solder joints may locate the source of the difficulty.

Posted on Mar 29, 2008

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Posted on Jan 02, 2017

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Sharp R-9H84B-display black, cleared display shows "Conv Mix, 88:88 Auto". Short time all dark again. Hit clear happen 2 times then, all dark, no power, can't clear won't start, nothing works.


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I would suggest pulling the control board out and looking on the foil side (opposite the component side) for "ring cracks," most likely on the low voltage transformer's connections.

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Also be sure the fuse is not easy to turn with your fingertips when it is in the holder. If it is, the fuse holder is too loose and must be replaced (not just squeezed with pliers).

You can order a fuse holder, part number WB06X10034 for $6.49 (subject to change) from the Pros here.

If you have any keypad issues, please note that the membrane keypads for this model have long been discontinued.

FixYa does not directly notify us experts of responses, so if you have other questions, please contact me directly.

- William E. Miller, AS-EET
pupista@gmail.com
http://www.microwavecontrol.com
Microwave Oven Control Panel Repair Nationwide
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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.
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David
This is a sure sign that the MAGNATRON unit has went out on your oven and will need replaced! (This is what cooks the food!)
Please take a second and rate my response!
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Some do it yourself tips here.

Info on ordering Sharp UK parts / spares is here.

For local servicers, see this page.

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

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Look on the back for the power requirements, them muliply the number of amps drawn times 100 . example 10 amps times 100 = approx 1000 watts, that will give you an approx. wattage. hope this helps
budman630

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