Question about Microwave Ovens
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Posted on Jan 02, 2017
Remove the case ... look on the base of the machine near the big silver thing (Capacitor - DON'T TOUCH IT !!!) You should find the main fuse near where the cord enters the case.
Posted on Sep 13, 2009
Usually when a microwave regardless of brand quits mid cycle the main fuse has failed. It is easily located as it will be the very first connection point off of the end of the power cord. Remove all of the chassis screws usually 4 on the sides and 6 on the back of the unit. Then begin lifting the chassis up at about a 15 deg angle and pull to the rear, Once the chassis is removed be very careful no to touch the large capacitor as it will still have a considerable charge. Locate the power fuse by following the power cord to the white and black terminals and remove the fuse. Purchase an exact replacement fuse and replace it. Reinstall the chassis cover without the screws and test the function of the unit by heating a cup of water until it boils. If it passes this simple test it should be fine. If it works momentarily and then quits the power diode has probably failed. The power diode is a 2.5 inch long and 0.5 inch wide and black located either on the bottom of the chassis or the inside back panel. This can be tested with an ohm meter by testing resistance. Set the meter to any ohm setting and place the test leads one on each terminal. The power diode should only read in one direction. If it reads in both directions (reverse the position of the test leads on the terminals) then the power diode has failed and will need to be replaced.
Posted on Jan 02, 2010
If your handy with getting the cover off and looking inside... check the obvious.
I suspect :
If both microwave and Heating elements dont work, then I will assume the magnetron is ok, ans we are dealing with a high voltage issue... and you will need at best... a volt meter and or neon troublelight...
moust appliances have a simple schematic inside... I would start with the heating element first... trace wiring back to circuit board... usually one side of the heating element is connected to the white wire (neutral) and live (Hot) side is controlled thru the circuit board... so finding the neutral should be easy... then trace with neon light or voltmeter...
I know easy for me to say... but with everything else working... it doesnt seem to be the microprocessor that controlls the unit...
Posted on May 06, 2010
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