No Power in bertazzoni Microwave MO30STANE

[manojdada]

Model Number

MO30STANE

Age

1-5 years

Hi All,

I have bertazzoni Microwave and no power. I do not see anything on display. I tested following componen

diode and capacitor
Magnetron
Two fuse all has continuity.

I can not test ceramic fuse because it has been soldered on board, there is Magnetron Thermal fuse and i do find NO continuity. looking for feedback how to make sure it has broken M Thermal fuse



Magnetron
Two fuse all has continuity.


I can not test ceramic fuse because it has been soldered on board, there is Magnetron Thermal fuse and i do find NO continuity. looking for feedback how to make sure it has broken M Thermal fuse .

 

[jeff1]

Hi,

Just by looking at your pics ( nice jobs on those )....doesn't that board with the fuse have 2 wires going in and 2 wires going out? Power in but no power out tested with a volt meter should suggest the fuse is bad.

jeff sr.

 

[manojdada]

Hi Jeff,

Thanks. I like to remove that ceramic fuse and test continuity but it is soldered on the board. i did test that fuse without taking out from the board i can see continuity. Please suggest me how to test it. Appreciated help
Manoj

 

[jeff1]

Isolating the fuse is best, but all that is required is to isolate one side of the fuse to continuity test the fuse.
Those ends look like they will seperate from the fuse.

jeff sr.

 

[manojdada]

to isolate the ceramic switch, i will have to de-solider one. There is cap on top fuse and that cap is solders to board. How can remove the cap from the fuse Any suggestion.

 

[jeff1]

If you don't think the end will come off of the fuse then you have no choice but to un-solder it.

jeff sr.

 

[manojdada]

done. I took out and tested continuity and it has continuity. Only Magnetron Temp fuse does not have continuity

 

[manojdada]

any other suggestion ?

 

[jeff1]

I took out and tested continuity and it has continuity.

Good job!
Put back together.

Only Magnetron Temp fuse does not have continuity

Bypass it to see what happens. A wire with alligator clips was useful for doing this for me.

jeff sr.

 

[manojdada]

I changed the magnetron fuse and it powered on. When i start the microwave, house electric fuse tripped. any suggestion ?

 

[jeff1]

I changed the magnetron fuse and it powered on.

Good news.

When i start the microwave, house electric fuse tripped. any suggestion ?

A dedicated outlet? Too many things on that line? Shorted high voltage capacitor?
https://www.applianceaid.com/capacitor-testing.php

jeff sr.

 

[manojdada]

Yes it was in dedicated outlet. I plugged in the microwave, power came up, i put the water cup inside, close the door and started it. It trip the dedicated circuit breaker in the house. It happened three time. I started testing the continuity again for Diode, Fuse, Meganatron. I see all has continuity except lower door switch. I see continuity with or without door is closed.

Does capacitor test is continuity test?

Thanks
Manoj

 

[jeff1]

Does capacitor test is continuity test?

Yes continuity test with an analog meter.
https://www.applianceaid.com/capacitor-testing.php

except lower door switch. I see continuity with or without door is closed.

Shouldn't normally blow a fuse unless opening or closing the door.
Something like a shorted capacitor will blow a fuse as soon as you press start.

jeff sr.