Question about Sharp R-1470 Microwave Oven

1 Answer

I have a sharp microwave, model #R-1470. It's about 14 years old. I went to use it and it sounded like a power surge and then lost all power. I checked the electrical outlet and it has powere to it. Is their a reset button or fuse on this model that I could check?

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Sharp Master
  • 9,047 Answers

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.

Posted on Oct 02, 2010

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get 2 Free calls (no credit card required) and instant help on almost anything you can think of (from cars to computers, appliances, handyman, and even pets).
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I have a 12yo Sharp r-430cs microwave. The LED is not displaying all the "lights" in the numbers/alpha readouts. It is missing a lot more of the readout than it is showing. Everything else is working


Go to Sharp's website and check availability of the clock/timer readout board. Being that old you may not be successful, but it;s worth a try.

Oct 21, 2014 | Sharp Microwave Ovens

1 Answer

Panasonic NN-SD277. Almost 3 years old. We pressed start, it went for about a second (may have made a sparking sound) and then it just lost all power. There is still power to microwave but no lights are...


We also have this same microwave. It is less than 3 years old. We've had nothing but problems since we purchased it. In November 2010, the microwave made a crackling sound and then BOOM! Nothing. I have been back and forth with Panasonic. I refuse to pay for the repair on an appliance that is less than 3 years old. It's ridiculous!

Anyway, the problem t is an issue with their inverters. Google it and you will find page after page of the same story.

Jan 21, 2011 | Panasonic Microwave Ovens

1 Answer

When plugging in a Sharp R-33st microwave, nothing happens except a flashing time, no buttons seem to work, any ideas?


it sounds like this is not a new microwave,, is it getting on in years?
if the microwave was discounted from the mains when it was pluged back in the power surge could have blown the circuit bord inside it,, this is quite common, it may be cheaper just to buy a new microwave than spend good money on an old week unit

Mar 05, 2010 | Microwave Ovens

1 Answer

Power just died on microwave


There is no real safe fix. When appliances like that go bad like that it would be best advice to just get a new one to be on the safe side. You can pull off the cover with 4 screws and look to see if anything has been fried. But again, being safe is number 1

Feb 07, 2009 | Sharp Microwave Ovens

1 Answer

Hood range microwave not heating up


We had one that did the same thing. my brother got so mad at it he put a wrench in it and turned it on. It didn't do anything to it. No power surge nothing. It acted as if I put a plate of food. Lighted up turned and even beeped when done. The wrench wasn't even hot. Now I do recommend this myself. But we went and got antoher one.
There is something in there that magnifys the power inside the mircowave and it sounds like its out.

Dec 12, 2008 | Emerson MW8778 Microwave Oven

1 Answer

Microwave won't work. The time is frozen, buttons dont work.


I have over 20 years experience with microwaves and over 25 with all other electronics, and I'll have to say it sounds to me also like some kind of power surge "scrambling" its "brains".

Or possibly its power is being interrupted for a fraction of a second and having the same effect.

A microwave should really be on its own circuit breaker.

Microwave ovens, refrigerators, toasters, and electric ovens are very high current devices.

There are power line (mains) surges created when they cycle on and off.

If the microwave can't be on its own breaker, then maybe you can try a power strip with a surge suppressor, or better yet, a power strip with a surge suppressor and a built-in noise filter.

Or it may be that there is a subtle bad connection on the circuit board or at the fuse holder.

These kinds of problems are difficult to diagnose, and even harder to do remotely. Especially since I'm in the US! *grin*

I would strongly suggest that if you can't cure this with a surge strip or similar, please carefully document when and how it fails, then while it is in a failed state, open the door (to keep it from starting on its own) and call Sharp customer service at 1300 13 50 22.

Or you could visit here and click on Service Centre Location search.

You should have a one year warranty, so you should get in touch with a Sharp-authorized repair center.

An over the range type will include home visits in the warranty, but not if it's a counter top model.

You'd have to take that type to the shop yourself, and of course that would mean unplugging it, which would reset it, and the repairman may never see if fail.

If you wait too long, your warranty will be expired, so I'd get in touch with the shop.

Good luck.

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

Dec 01, 2008 | GE XL1800 1100 Watts Microwave Oven

1 Answer

Blown Microwave


Most likely a shorted capacitor and a blown fuse. Very common problem on that model.

Jul 16, 2008 | Microwave Ovens

1 Answer

3 year old unit, oven works, microwave does not


hi,

You may need a new magnetron, contact sharp or the store you got it from; most microwaves have a 3-5 year warranty on the magnetron. If it's not in warranty, find a good appliance repairman, this is a difficult and dangerous repair job.

Apr 03, 2008 | Microwave Ovens

1 Answer

Sharp model number: R-320HQ (1200 watts)


the electronic circuit are corroded timer does not function / the IC program was lost of memory such as function / if you have some old look a like Sharp Model you may transfer control panel.

Jan 05, 2008 | Sharp R-510HW Microwave Oven

Not finding what you are looking for?
Microwave Ovens Logo

473 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sharp Microwave Ovens Experts

William Miller
William Miller

Level 3 Expert

9047 Answers

Devabhakthuni...
Devabhakthuni...

Level 2 Expert

225 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Are you a Sharp Microwave Oven Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...