Question about Sharp R-630D Microwave Oven

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Sharp Microwave stopped heating

Our Sharp Microwave - Model # R-630DSA just stopped heating in the middle of a "reheat" cycle tonight. It is 4-5 years old, has been great, and I would like to fix it myself if possible.

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  • NDJordan Sep 12, 2008

    it blows my power when turned on to bake. the radiation level is dangerously high.

  • William Miller
    William Miller May 11, 2010

    Do the inside light and turntable come on when you try to cook?

    Is it making any unusual noise or is it louder or quieter than normal?

    We have the service manual for this model and have uploaded it to our site here to help you. You will need the free Adobe Reader to view or print it.

    Once you answer, I should be able to narrow it down for you.




  • Anonymous Mar 29, 2014

    Sharp microwave

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  • Sharp Master
  • 19,396 Answers

If it is working but not heating, then test the high voltage capacitor,the rectifier diode.or the magnetron. If all this are fine, test the control board.If turntable is not running check also the door switch.

The diodeand capacitors can be tested. The capacitor must be allowed discharge before testing, or you risk to get electrocuted, evenif power is off.Capacitors can get discharged by shorting their two contacts.
Before replacing the magnetron test also the control board.
Replace the magnetron if the checks and all of the high voltage component tests are good, but the unit still does not heat.



All locations, and description of this parts can be located using the diagram here: Counter top.

Parts must be tested to find out what is wrong.

Remember that microwaves are potentially dangerous devices if not repaired properly, the job must be done by a competent person.
A microwave energy leakage test must always be performed when the oven is serviced for any reason.

Regarding parts, contact the seller here to purchase parts.

You can also order from MicrowaveSvc , they also provide parts.

Posted on May 16, 2009

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Posted on Jan 02, 2017

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1 Answer

Microwave stopped working


Probably a problem with the door latch safety system. This happens every so often with our microwave, which is over 25 years old, and otherwise works perfectly.
If yours is new, it may still be under warranty. If not, there are places that specialize in fixing microwave ovens.
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It sounds like 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 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.
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Hi,


Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Basic Microwave Oven Troubleshooting Tips

heatman101


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Sharp microwane R-630DSA not heating properly


Chances are you have a shorted high voltage rectifier, which is pretty easy and inexpensive to replace, or a shorted magnetron, which is more work and money.

We have the service / repair manuals for this model and have uploaded them to our site here and here to help you.

They will give you safety info, step by step help in disassembly, troubleshooting tips, and part numbers.

Most computers will open these documents automatically, but you may need the free Adobe Reader.

Here are some links you 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/mag_test.html

You can order parts from Encompass here http://tinyurl.com/7qy85y 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.

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There are several possible causes for a dead oven. Since yours quit in the middle of heating, I'd say it's most likely failure of the magnetron tube which supplies the microwaves. There's a safety thermostat on the tube which opens up and shuts off power if the tube overheats. Overheating is one sign of a tube that's gone bad.

There's really nothing user-serviceable in a microwave oven. Because of hazardous voltages inside and the possibility of microwave leakage, service should be left to professionals. Take the oven to a service shop for an estimate.

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Sorry if you misunderstand, but I offer free advice so you or someone you know can fix things yourself.

Chances are you have a bad magnetron or other high voltage part, but I won't bother you with details now.

You take care of yourself.

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Generally, the most common causes of a failure to heat are:

- bad door switches or door switch mounts
- loose connection at the magnetron
- problem or loose connection on the control unit circuit board
- bad magnetron or other high voltage part (such as a shorted diode)

If you or a friend decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and
disassembly information at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

You can usually find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383

We're happy to help and we appreciate your thoughtful rating of our answer.

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If that is a new appliance, I would call GE and ask them to give you a new one or get someone to fix it.
This microwave should have one year warranty.
Hope this helps.

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