My microwave stopped working about a third of the way through heating my dinner, so amid much cursing and cold chicken and rice, I took it apart and found this.
I'm going to replace it but want to know why the inductor would get hot enough to burn out like that. Just shit build quality? The microwave is only a few years old at most.
Frigidaire Gallery, if anyone's curious.
Here's the top side. It's not really visible in the picture, but the ends of the copper wire are black (probably just the coating), but there's no other damage. The fuse is good.
scrape the burned shit with alcohol, expose some copper on the trace and solder that shit good, if it works your good, if it burns again the problem might rely on something down the line (after that board)
gl
>the inductor would get hot enough to burn out like that
oh and btw, the inductor probably didnt burn the trace, it vibrated enough to break the solder/trace until there was so little contact area that the trace/solder left began to overheat from the amps going through it until it couldnt take no more
>my 2c
>>1071658
I might try using some of that white glue/thermal compound on the posts to keep it from moving in the future.
>>1071645
looks like an input filter to the microwave
all the power passes through that point - no wonder it scorched at the bad joint
>>1071661
>glue/thermal compound
Forget thermal compound.
Some silicon on top of the board may help.
Clean up the under side and solder the thing up with some good leaded solder. Some copper wire to bridge the burnt out areas will help too.
>>1071645
Bad solder joint, clean it up and resolder and it should be fine
>>1071645
Forget to take out the spork before you threw it in there?
And I wouldn't just resolder it, you better replace whatever that 4-pin is.
>>1071645
>why the inductor would get hot enough to burn out like that
>>1071677
>Bad solder joint
This
'cold' solder joint leaves a hairline crack around part
current flow through part and movement of part cause arcing
arcing heats solder and part and solder falls out causing failure
Clean up and re-solder.
>>1071645
Just remove the old solder apply some fresh lead-based solder, its called a cold solder joint and happens because the greenists forced everyone to use lead free solder.
But this has created more problems because lead free is shit and sometimes doesn't flow correctly during assembly. The result is what you have now, most people would have tossed it out in the garbage creating move waste.
tl;dr re-flow the solder joints and it will work once more.