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Sharp R-1870 Convection/Microwave Oven Questions & Answers
How to unlock sharp stove?
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.
I tried one cup of water with my bag of orville
follow this steps and fix it. God bless you
- 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.
- 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.
- Damaged magnetronResponsible
for generating waves and producing heat. When your microwave is no
longer heating properly, replacement will be required.
- 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.
Microwave doesn heat
please follow this steps and fix it. GOD BLESS YOU
- 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.
- 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.
- Damaged magnetronResponsible
for generating waves and producing heat. When your microwave is no
longer heating properly, replacement will be required.
- 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.
Door latch sharp 1870
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.
Door snaps when you open it fully
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.
Sharp micro counts down 59 seconds and stops
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.
Sharp convection microwave oven model R1875F. It's cooking on the left side faster then the rest of the oven. It seems to burn on the left side and not cook in the middle.
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.
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