Emerson MW8987B/W Microwave Oven "always short circuit" Questions

ALWAYS unplug a microwave to replace the bulb. I have seen a lot of units damaged that way. Need either a new circuit bosrd, or someone to repair the blown traces on that one and test it. Sometimes it

...short in your microwave. b. This is usual;ly caused by a couple of things 1) The power diode for the magnetron is shorted 2) The capacitor has shorted 3) A door microswitch has failed in the open ...

...short and blowing a fuse. There should be a ceramic fuse on the power board. Also look for anything that crawls and has more than two legs. Microwave ovens are not worth repairing unless you have ...

...short while replacing the bulb(s) and, causing damage to the circuit board. pull the board out and carefully check for burned foil traces; and rebridge with solder. it may or may not work. always ...

...circuit has failed. It is the magnetron that generates the microwaves to heat the food. Typically the magnetron shorts out. The symptoms is that when it is on, it creates a loud buzzing noise when it ...

...always happens when it comes on but normalls stops when the microwave goes off. i tried unplugging it for a few mins and plugging it back in. didnt work. i tried letting it sit for a min or 2 to see ...

always clean. light, timer etc working. If it stops heating and the other parts of the oven still work, the problem is with the magnetron circuit. If it makes a loud buzzing noise when you try to heat

circuit board or order a new one. But $$$$ always unplug the Microwave to replace the builbs, It doesnt seem like a big deal but I have seen this a lot over the years and it really does some damage to

...always conclusive). Step 11 of the recommended repair procedure says to "Check voltage at 4903-2 on electronic control. If it is 120 V AC unplug microwave oven or disconnect power." Then ...

...always caused by faulty door switches. Also check diode from the big cap to earth. be careful the cap can store high voltages even when unit is off.Discharge capacitor first with a wire to earth.Make ...