20 Most Recent Sharp R-1470 Microwave Oven Questions & Answers

Did you try the Sharp web site?. The manuals for their products are usually there for you to download.

door switches or control circuit, may be loose contact or open check all wiring and circuit...

I would suspect that you have a bad door switch or mount, or perhaps the "Start" pad on your keypad is bad.The quickest way to check is to hit the "Minute Plus" pad and see if the oven cooks.If not, it's a door switch or switch mount issue, either the top or bottom one. See my complete text file on door switch trouble here.If it cooks, then your keypad is defective. It is part number FUNTKB107MRE0 (note zeroes, not ohs) and you can order one from Encompass here or you can call them toll-free at 866-779-5835. We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Since no model number was mentioned, I'm confined to giving a general answer. It may be a bad fuse, thermostat or thermal cutout. In rare cases, it is a problem on the control circuit board. You can find links to helpful exploded view diagrams and part ordering help here. I recommend that you bookmark that link to your favorites. At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.Disassembly information for counter top ovens is here.In many models, there is a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

replace the IO circuit board.

thanks
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I would buy the microwave oven that has the one year warranty because it covers your purchase 100% If you buy one with a one limited warranty you need to read the fine print what it does not cover, and the magnetron with a five year limited warranty sounds good but has restrictions on the actual coverage, meaning they can refuse the claim by saying it does not meet the criteria, because the "claus limited" has been put into place and is misleading.

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

Basic Microwave Oven TroubleshootingTips

heatman101

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 !!!!any capacitors are 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.

We have a similar model's service manual at our site which will help you, but note that the part numbers will not be the same.

It's here: http://031d26d.namesecurehost.com/mwd//r1480_r1481_r1482_sm.pdf

If I had to bet, I would say the high voltage rectifier diode or high voltage capacitor shorted and blew the fuse.

Here are some links you or someone you know can use for test help, but read their safety warnings first:

http://www.gallawa.com/microtech/diode.html
(if it's not shorted or burned, it's probably okay)

http://www.gallawa.com/microtech/cap_test.html

Once you replace the fuse (15A or 20A fuse available at hardware stores, etc.), if it goes dead again almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

If it goes dead several seconds after pressing the Start pad, that's usually a failing high-voltage transformer.

If it runs fine but won't heat, you have a bad high voltage rectifier diode and/or magnetron.

A loud buzz, hum, or groan is usually a shorted high voltage rectifier diode, but a sound like gurgling into an empty coffee mug is one symptom of a failed magnetron, and yet the mag can be bad without that sound.

You can order Sharp parts from Encompass here or you can call them toll-free at 866-779-5835.

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

mcdevito75 here, Best bet, try to contact Sharp online, or see any store that sells Sharp microvave ovens in your area for contact info.