I am replacing my electrical outlets in my house, i have replaced most on my main floor with no problems exept my kitchen. When i replaced my outlets in my kitchen and then went to turn on the power at the fuse panel a spark and smoke poped from the kitchen fuses, what is the problem?

That is a funny looking unit! You know we are Fixya and not Thermador right?

There must be too much heat back there and it is over heating the socket and the microwave lead which isn't heat resistant and normally only has its own heat to contend with.

What I would do is pull all that appliance out an put it on the other side to the kitchen, and ask a bigger electrical contractor to MOVE and REPLACE a pair of outlets in a kitchen for a remodel. What I would do is to certainly move the microwave outlet to the cupboard next door. Make a decision whether to move to 220 oven outlet as well. Don't mention anything about burning plugs or the 87 volts. Tell them you would like Industrial Quality Outlets and not domestic. I reckon that will fix the problem.

The sounder is an integral part of the control board.

I have that problem at my house.
At my house, here is why.
The house was made in 1960.
The ground wire in the "Romex" cable inside the house everywhere is tiny, about a 20 gauge wire.
Because of that, the circuits are very easy to overload.
Kitchens today have lots of electric stuff.
At our house in the kitchen, we can run nothing but the microwave, or nothing but the toaster oven, or nothing but the blender, etc.
Rewiring would cost a LOT of money here, so we just "adjust".
God bless your efforts.

electrical work is not for DIY
some one has messed with the electrical wiring of the house so get in an accredited electrician and consider having the house rewired using the correct ELB devices in the power box

If you are getting your microwave to turn on then you are just fine on your outlets. They should be putting out 120v. You just have an under powered Microwave.

In general house hold circuit breaker of the house is 15 Amps or 20 Amps.

Either you have defected (weak) circuit breaker and wiring or bad Microwave oven.

The 99.99 % house hold Microwave ovens pull less than 15 Amps. They may have internal ceramic 15A fuse or 15 Amp internal circuit breaker.

To isolate your problem:

1. Plug your Microwave oven to different areas (different electrical circuit) if the different circuit breaker still trips... your Microwave oven has a short - Most of them has a small ceramic fuse 15 amps fuse.-also check some inter lock switches at door .

2. If the Microwave oven works Ok then you may have:

2a. You may overload the existing electrical circuit, try to unplug some other appliances

2b. You may have bad electrical outlet receptacle (Replace it with the same type , - may need helps from licensed electrician)

2c. Weak or defect house hold circuit breaker. (Replace it with the same type , brand - may need helps from licensed electrician)

The main fuse in the microwave oven has probably blown, it usually goes when a part has failed.

I would suggest having whoever installed the new appliances come back and check out his work. There might be a poorly made electrical connection somewhere, and you might have a potential fire hazard.

You might also have gotten a lemon microwave oven. This happens sometimes. (Usually when I buy something.) Contact the store where you purchased it and ask if they have a service person who can check it, or just tell them what's happening and you want a replacement. They'll just return yours to the manufacturer.

In any case, have this checked out to be sure your wiring isn't at fault.

Hello if you have no power at the outlet, you may have saved your microwave. If the outlet is dead go to your house electrical panel and reset the breaker or replace the fuse. if the outlet is live and the microwave still won't power on you will have to choose between repair and replacement. Definitely get an estimate before agreeing to a repair as microwaves are very inexpensive today compared to even a couple of years ago.

I had a similar problem with my Whirlpool microwave. I replaced a fuse (after reading posts in this forum) and it's working again.  I'm not sure how similar your model is, but in my case it was an in-line fuse in a wire leading down from the main fuse in the upper right corner behind the control panel.