Question about Sharp R-4A58 Microwave Oven

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Where can I find a replacement touch pad for Sharp microwave oven - Model # R-4A58?

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6ya6ya
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Posted on Jan 02, 2017

MicrowaveSvc
  • 9047 Answers

SOURCE: Sharp Carousel Convection Oven. Model R-9H54.touch pad

It depends on what you mean by "a problem with the touch pad assembly".

If some or all keys do not respond, you would probably need a new keypad, but the key units for all Sharp R-9H-series models have been unavailable for a few years now.

These units did indeed last a long time.

Sorry I can't bring better news.

Posted on Dec 06, 2007

MicrowaveSvc
  • 9047 Answers

SOURCE: R-4H84 Sharp Carousel II microwave oven stoped working

A microwave can be dead for many reasons.

The fuse is normally located on the floor of the chassis behind the control panel or between the door switches.

If the fuse is good, it may be an open thermostat or thermal cutout (TCO) / thermal fuse on or near the magnetron or on top of the cavity / body of the oven.

If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the magnetron thermostat to open.

Then when it cools, it closes the circuit and allows power through again.

When checking thermostats, if it has a hood fan thermostat, that should read open, as opposed to the others, which should read closed.

If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

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

If it goes dead or blows the breaker when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount.

If it's intermittent or random, it may be a bad connection, usually on the control board or a loose fuse holder, or even an intermittent fuse.

You should do a continuity test on the fuse while it's in the holder (with the microwave unplugged, of course) then turn the fuse by hand or take it out and put it back in, then test it again.

If you remove the fuse, then press the meter leads against the ends, it can allow internal contact to be made and make a bad fuse appear to be good.

If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

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

Posted on Jun 23, 2008

MicrowaveSvc
  • 9047 Answers

SOURCE: tricky touch pad on Sharp R530 es microwave oven

There are two options here:

1. Order a new control panel frame which has the keypad, trim piece and door button already installed and swap your control boards into it.

The original part number FPNLCB346MRK0 has been replaced by part # FPNLCB346MRK0B and it runs $58.28 plus shipping.

2. Disassemble your control panel frame, peel off the old keypad and stick a new one on.

Even though the keypad alone runs only $35.66, this job takes a lot of time and labor.

If you (or someone you know) might want to replace just the keypad yourself, I have uploaded a handy guide with pictures showing you what's typically involved.

Whichever option you choose, we have the service manual for this model and have uploaded it to our site here to help you.

You will need the
free Acrobat Reader to view or print it in case you don't have it already.

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

Posted on Jan 19, 2009

MicrowaveSvc
  • 9047 Answers

SOURCE: Sharp microwave oven model r-1440 runs, but doesn't heat food

Assuming your inside light and turntable come on when you try to microwave, with the symptoms you have, I would most strongly suspect a bad magnetron or a loose and possibly corroded connection on the magnetron's terminal.

If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.

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.

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'sprobably okay)


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

The best place to order parts for this brand is Encompass (formerly Tritronics).

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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Posted on Feb 08, 2009

MicrowaveSvc
  • 9047 Answers

SOURCE: I need a manual for Sharp Microwave/ Convection R7A85

You can download that here free.

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

Posted on Aug 30, 2009

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For an oven this age, and considering the cost of a replacement oven, it will probably not be economical to repair.

But the membrane keypad is part number FUNTKB090MRE0 and you can order it from Encompass here.

If you (or someone you know) might want to replace it yourself, I have uploaded a handy guide with pictures showing you what's typically involved.

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

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If some or all keys do not respond, you would probably need a new keypad, but the key units for all Sharp R-9H-series models have been unavailable for a few years now.

These units did indeed last a long time.

Sorry I can't bring better news.

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