Question about Sharp R-1610 Microwave Oven
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Posted on Jan 02, 2017
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
Is it dead, meaning no
display, no light when you open the door and no beeps when you press a
pad on the keypad?
We have the relevant service / repair manuals for this model and have uploaded it 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
I would suspect the 20A ceramic line fuse or the magnetron temperature fuse.
You can order parts from Encompass here or you can call them toll-free at 866-779-5835.
20A ceramic fuses are available at local appliance part stores or places like Wal-Mart and Lowe's.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Jun 04, 2009
There are a couple of safety thermostats in the oven to shut down power if something overheats. One is on the magnetron tube (the microwave source), the other is on the cooking cavity. These sometimes go bad. There's also a power line fuse that may have failed, or become loose in its mounting clips. These can be tested with an ohmmeter; they should all measure very close to zero ohms if they're good.
Another possibility is that the control circuit board in the oven may have failed. I have worked on several Sharp ovens where the power transformer for the board has gone bad for no good reason. If the board goes bad the oven may appear to be dead as well.
Microwave servicing is best left to professionals. If you're thinking of keeping this one, take it to a service shop (or call for home service) and get an estimate. Then decide whether to repair or replace.
Hope this has helped a little. Thanks for using Fixya!
Posted on Feb 02, 2010
Testimonial: "Thank you. I will check it out and then decide whether to repair or replace."
mcdevito75 here, Best Bet, contact Sharp online, try sharp microwave oven.com Or in any store that sells Sharp microwave ovens get contact info off that package.
Posted on Jul 07, 2010
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