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If the fuse is blown the microwave will be "dead". The fuse is accessed by removing the cover. You can usually find the fuse by following the power cord into the microwave. Unplug the microwave and don't touch anything except the fuse as the capacitor can hold an electrical charge.
A microwave is not a good candidate for novice repair. However, since it isn't completely dead, the power circuit is likely intact (not a blown fuse). The major components involved are the capacitor and the magnitron. The cheapest is the capacitor. If you have to replace the magnitron, it is not likely economically feasable. Be careful of the cap - it contains energy even when unplugged!
no the big fuse has gone usually 10 amp bigger china body fuse
so get the right bits
has no display so no power
i think your microwave oven
may have a fault in a thing called the diffuser plate
its a square or rectangle of mica a mineral
its used to scatter the waves around the oven for even cooking
it can develop carbon tracking as it changes state
so shorts out the energy to the body of the oven and can eventually blow the fuse as fuses become tired from surges of used energy
or some part of it has a problem exposing some metal parts not earthed to the chassis
magnatrons are the best actual valves every made
almost indestructable other than the heater element {inside the square end metal can is its connections usually welded {dont try to solder them}
so no the magnitron is aok
look for another reason
usually replacing the fuse and defuser and a good clean perhaps sometimes its the plate rotation drive motor plastic drive part
also becomes carbon tracking
causes the same error
good luck
note for all ::
>>
next time buy a stainless steel microwave
from a good maker
and good parts supply of defuser plates as they do go wrong
Check and replace magnitron with one of the same number or equivalent.High tension transformer fuse may be blown or high voltage diode and or capacitor shorted. N.B. Please disconnect applance from mains and discharge large capacitor before carrying any DIY on any microwave,
When the magnitron fails it will do one of two things, it will give no microwave action to the centerplate or it increases in strenghth many times to where it is very hazardous. Yours appears to be the first case. I;'m assuming that you've checked the fuse on the board, seeing you were already back in there to check the harness to the magnitron.
inside the microwave there is a low voltage power supply that powers the computer and display ... that is not working in your case .. if there is no low voltage power then nothing else will work .. there are several possible causes .. you can have a blown fuse on the low voltage power supply board (usually the main and only board) ... there is also a thermal fuse ... if the microwave magnitron got exceptionally hot then it could trip the thermal fuse .. this would kill power to everything else ... high magnitron tempratures can be caused by blocked air flow or running the microwave with nothing in it ... once the thermal fuse is tripped it has to be replaced ...there is also an over temperature switch that simply shuts off the power until the system cools , but this is self reseting unless it goes bad .. inside the microwave oven electronics are the most dangerous combination of high voltage and high current you will likely encounter in your life .. you simply have to know what you are doing in there ... this combination can be fatal in a fraction of a second ... your problem is inside there where its dangerous .. the low voltage supply and computer are not dangerous but the voltage they control is .. .. all parts that can cause this trouble are available for most microwaves so yes its repairable but think twice before opening .the case .. there are microwave repair centers around here .. the cost may or may not be reasonable since new microwaves are available for really good prices right now ....
no, just 1 main fuse for everything. there are temp safety
devices though, and door closed safety switches. Most likely
failure though is the magnatron.
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