Sharp R-1870 Convection/Microwave Oven - Answered Questions & Fixed issues

If the Damper Switch loose contact will couse this problem,try to clean the contact of the damper switch and damper motor .

Those screws screw into the support plate mounted onto the wall behind the unit. would guess it is not lining up for some reason or the hole is stripped out. Would have to remove the unit from the wall to inspect the mounting plate and make sure the hole are not stripped out. Lookt at the end of the bolt. do the threads look clean and not pulled or stripped???

Manual is available for download here ... http://www.sharpusa.com/Support/ProductDetail.aspx?model=R-1870 Carousel tray ... http://www.searspartsdirect.com/model-part/r1870/0958/0123370/50020288/00001.html Item 4-3 about 2/3 of the way down the page

If it consistently runs for exactly 59 seconds, and shuts off, it's probably the control panel.

If it runs approximately that length of time, you might have a defective thermal protector on the magnetron, or the magnetron is running too warm for some reason. If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_29ad5d1dd86564b0

I've had a similar problem with a 1983 Sharp Carousel microwave. It turned out to be a faulty door micro switch, the contact didn't stay closed inside it for very long.

Disassemble the set, take out the motor, and replace it with a new one in place.

Contact any service technician. http://electronicshelponline.blogspot.com/

Not super familiar with Sharp Microwave ovens Convection or not, but most microwave ovens can run into at least two reasons that they won't open and both require you to remove the cover over the whole oven - If the door has a push-button to release the door, you could find inside it has popped free of it's pivots and is not lifting up the latches on the door so you can open it, or is has actually snapped that latch. The other thing I have seen more on Panasonic microwave ovens and again moreso on the newer Inverter ovens, is that the latching assembly inside is attached to too thin a piece of metal and the metal actually bends - now your door and it's latching assembly and switches don't line up properly. In that case you will still need to remove the cover and do your best to realign the switch assembly with the front of the microwave so that the door can click in and out easily.

yes , keep the turn table on, and also watch the time you put on them

Grind the top of the rivets off, then with a small punch and hammer tap the rivet into the hole.

looking for a tray or plate roller wheel for a Sylvania model SM81001 ser. no. 0008001033

There are some parts that are not user-servicebale and are only available to a service technician. Contact your local service.

please follow this steps and fix it. GOD BLESS YOU

1. Check the power diodeThis electronic component is responsible for transmitting current in one direction. If the diode becomes defective it will cause your microwave to not heat. Test the diode and replace it if necessary.
2. High voltage capacitorResponsible for storing electricity, this part is a key component in any microwave. Remove, discharge, and test the capacitor to determine if it requires replacement.
3. Damaged magnetronResponsible for generating waves and producing heat. When your microwave is no longer heating properly, replacement will be required.
4. Thermal CutoffsExamine the thermal cutoffs on both the magnetron and the oven itself. Take off one of the leads and using a volt-ohm meter on RX1, check the terminals. If you get a result other than zero, replace the thermal cutoffs.

follow this steps and fix it. God bless you

1. Check the power diodeThis electronic component is responsible for transmitting current in one direction. If the diode becomes defective it will cause your microwave to not heat. Test the diode and replace it if necessary.
2. High voltage capacitorResponsible for storing electricity, this part is a key component in any microwave. Remove, discharge, and test the capacitor to determine if it requires replacement.
3. Damaged magnetronResponsible for generating waves and producing heat. When your microwave is no longer heating properly, replacement will be required.
4. Thermal CutoffsExamine the thermal cutoffs on both the magnetron and the oven itself. Take off one of the leads and using a volt-ohm meter on RX1, check the terminals. If you get a result other than zero, replace the thermal cutoffs.

The service manuals you need are here and here.This is often a broken door open lever or door open button.You should be able to remove the controller assembly (see video here) and see the parts you need to check.If not, you will need to remove the oven from the wall.You can order Sharp parts from Encompass here.

Possible that the alignment of the DOOR is not correct as it might be rubbing against the lock and switch. You need to remove the front panel and reset the lock and switch to solve this fault. Check for broken plastic parts which can be glued back.

It seems this has been happening over the last few years. I am a retired appliance tech. My 1870 also started the 59 second routine, Also in a motor home. Pure logic. Had to be the board. New board same results. So now I need to run down a parts manual and possibly service manual, and get the damper switch and motor refered to in earlier posts. Changing out the board was fairly simple. Dropping the unit to change out the other components sounds like it will be a tad bit more difficult.

see the next causes. God bless you Diode The high voltage diode converts the A/C power output of the transformer to D/C, doubling the voltage to nearly 5,000 volts. This high voltage powers the magnetron which emits the energy that cooks the food. If the diode burns out, a lower A/C voltage reaches the magnetron, which is not sufficient to power the magnetron. When the diode fails it is often visibly burned out. If it appears to be good, it can be tested with a volt-Ohm meter capable of testing diodes. High voltage diodes frequently fail and are one of the most common points of failure in a microwave oven. Door Switch If the microwave does not heat, one of the door switches might be defective. Microwave ovens normally have three door switches, if any of them fail the microwave does not turn on and does not heat. Check the switches for continuity with an Ohm meter. Magnetron If the microwave oven doesn't heat the magnetron tube might have burned out. The magnetron uses high voltage, high current DC power to generate the microwave frequency that cooks the food. If the microwave oven is turned on when it is empty this can cause the magnetron to burn out. Once it is burned out it has to be replaced, it's not repairable. High Voltage Capacitor If the microwave doesn't heat the high voltage capacitor might be defective. The high voltage capacitor works with the high voltage diode to convert the output of the transformer to DC voltage and to double the output voltage. If the capacitor is burned out the entire high voltage circuit stops working properly. The high voltage capacitor can be checked with a special VOM meter which has a capacitance testing capability. Be aware that the high voltage capacitor can retain a charge of more than 3,000 volts and can injure or kill a person if not handled properly. Only trained technicians should perform this type of testing. High Voltage Transformer If the microwave does not heat, the high voltage transformer might be burned out. Microwave ovens produce a very high voltage in order to power the magnetron antenna, which emits the energy that cooks the food. Thermal Fuse If the microwave doesn't heat the thermal fuse may have blown. It can be tested for continuity. Watch our fuse testing video for more information. Thermoprotector If the microwave doesn't heat the thermoprotector may have tripped. This is a safety device to prevent the microwave from overheating. It can be tested for continuity to see if it's blown. Main Control Board If the microwave doesn't heat the main control board may be defective. This is not common. When a microwave doesn't heat the problem is usually within the high voltage circuit; either the high voltage capacitor, diode, transformer or magnetron.

PUSH UR MICROWAVE VERTICAL. IT WILL DISMOUNT ON ITS OWN.. THEN U CAN UNBOLT THE FITTINGS FRM UR WALL..

The turntable motor will need to be replaced, a common issue with most brands.