Question about Sharp R-1481B Microwave Oven
Here are the details. I think it's the control board or a switch. but I just want to confirm before I order the part.
I replaced the bulbs in the hood with bulbs in spec according to the manual.
After replacing the bulbs everything worked normally.
The next morning I could not turn the hood lights off.
Pressing the "work light" and "night light" switches got me beeping sounds but no on/off.
Unscrewing one bulb an alternating which one is unscrewed does not change result.
Everything else on the unit functions normally including the rest of the control board.
Any ideas? Part numbers from partstore.com are helpful as well.
Thanks so much!
The problem is on the control panel, which we regularly repair nationwide for $39.95 postpaid.
This is far less than a replacement circuit board, assuming it's even available anymore.
This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.
This often can affect the exhaust fan operation, too. The lights and fan can be inoperable or stuck on.
We have full details and critical safety information and disassembly information at our site, linked here on Fixya: http://tinyurl.com/yzjozk
Posted on Nov 17, 2007
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Feb 16, 2014 | Microwave Ovens
Make sure that the program controller is working if not check power - step down supply, the pads are responding- if not faulty pads- or the door switches, if the switch contact are not good then it will not trigger the processor to switch on the waveguides. If the lights or fan work without any display or action of program being triggered to start then it can be a possible fault on the main board or the processor. Sometimes insect secretion can short the board and display panel and so the processor can work in such an erratic manner. If so clean, solder and reset the board. Now identify the parts by clicking this link: http://www.espares.co.uk/advice/microwave/a/5/141/identifying-microwave-parts.html
If there is no heating please do not switch on unless you have confirmed the fault. It is possible that the Magnetron is faulty, the temperature cut off is faulty or the main capacitor is short. It is also quite possible that insect can get into the oven and create soft spots. When you switch on these will create a short and make the voltage jump and in the long run damage the magnetron. Check this link to know how a microwave works:
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