SOURCE: manual for sharp carousel R-230 AV
Models R420D and R520D also have this common feature found on Sharp microwaves. You can download that manual free at the link below (not my link) and the section on Compu Defrost should help you just fine. http://www.htsarebates.com/files/mic_man_420,520D.pdf#search=%22sharp%20compu%20defrost%20filetype%3Apdf%22 Or you can just do the Google search below and you'll end up with a list of several manuals you can try: "sharp compu defrost filetype:pdf" (without the quotes)
SOURCE: Where is the light bulb in an old Sharp Carousel Microwave?
Manufacturers used to include access panels in the rear or side so you could easily change the bulb. That exposed the customer to 110V connectors, and that posed a real liability threat, so they stopped using them.
You now must generally remove the outer cover to replace the bulb.
The service manual (available at our site) shows how and shows that the lamp is mounted in the air duct near the magnetron. See http://www.microwavedisplay.com/r510hk_hw_sm.pdf
Part # is RLMPTA086WRZZ and you should be able to get that generically locally but if not, you can get it form Tritronics at http://www.wehaveparts.com
If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk
SOURCE: Sharp Carousel Microwave door latch stopped working door won't stay closed
Microwavesvc, that's what I've had happen with my sharp also, I carved a hook out of a piece of plastic and then epoxied it in, and haven't had any more problems with that.
Another problem I've had with the sharp (that just reoccured, I'm trying to figure it out) is that the micro-switches that the door latch push have gone bad. Originally just one went bad and I replaced it, now the micro has the light and fan on, and won't recognize being closed...
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.
SOURCE: Where is the light bulb in an old Sharp Carousel Microwave?
Microwave_svc's site is awesome! I was able to get all the help I needed for a similar Sharp Carousel microwave. My bulb was simply loose in the socket base causing intermittent bulb lighting. Microwave_svc's helpful links got me to the service manual and, along with a nice set of "tamper-proof" screw compatible TORX bits I bought at HarborFreight, I was easily able to get cover off, remove bulb socket, tighten bulb, re-install bulb socket, button unit back up, and, voila, the light now works without intermittent blinking. FIXYA!!!!
Many thanks to guru microwave_svc!!!!!!!
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