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microwave diode keeps blowing??

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Originaly I heard a popping sound and then the microwave got louder and quit heating food. I disassembled the microwave

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Old 11-02-2010, 02:54 PM
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Default microwave diode keeps blowing??
Model Number: 65568601991   Brand: Kenmore   Age: 5 - 10 years   

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Originaly I heard a popping sound and then the microwave got louder and quit heating food. I disassembled the microwave and tested HV diode, capacitor, transformer, and magnetron. Everything except the diode cheked out OK. I replaced the diode put it back together turned it on and I heard a pop the microwave was loud for a second or two and then got quiet(like only a fan is running) still not heating.

I opened it back up tested all of those components again and the diode was the only thing bad again??? It seems like the diode is a symptom of something else wrong. From what i've read it is usually the magnetron. It tests fine..... Help Please!!


Thanks,


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  #2 (permalink)  
Old 11-02-2010, 02:57 PM
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Make sure, when you replace the diode, that the point of the triangle on the diode (the schematic symbol) points toward chassis ground.
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Old 11-02-2010, 03:02 PM
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Thanks,
One side of the diode has a screw connection for chassis and the other has slip connect for capacitor. The cathode is toward the chassis.
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