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circuitcide  
#1 Posted : Thursday, January 5, 2017 10:06:04 PM(UTC)
circuitcide

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I bought a small oven, the Ktichenaid KCO275.

It has an internal speaker that loudly sounds for any input you give it.
To silence it I took it apart. As I was unsure where the speaker was I plugged it in to listen. While twisting an input knob the control board shifted and made contact with the frame.
My guess is that this created a short as I heard a fuse snap and the unit went dark.

Now I need to find and replace the fuse. Then find and remove the speaker.

I have no idea where the fuse is, my guess for the speaker is the round black element on the control board labeled BZ?



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ThatGuy  
#2 Posted : Friday, January 6, 2017 1:23:08 AM(UTC)
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BZ would be buzzer or piezo buzzer. Yes it makes noise.

I hope your boards survived. Follow the power cord coming in. One side should have a fuse holder on it. Always replace the fuse with the same type and amperage.
circuitcide  
#3 Posted : Friday, January 6, 2017 1:24:47 AM(UTC)
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There is no fuse.

Would the boards be available as parts?
ThatGuy  
#4 Posted : Friday, January 6, 2017 7:26:27 AM(UTC)
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It might look like this. I thought I could see the edge of one on the far right of your pic behind the circuit board.

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circuitcide  
#5 Posted : Friday, January 6, 2017 3:54:26 PM(UTC)
circuitcide

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Thanks for the help.

It turns out this model does not have a fuse. Power comes in, through a resistor and the 2 diodes. Then out the drain of the switching voltage regulator.

However, much simpler is the fact that I tripped the GFCI on the wall power outlet. After a re-set it now powers on.
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