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Tried making a bag of popcorn Saturday night and thought we had a bad bag that didn't pop, tried another one and the same thing. That's when my wife said the microwave smelt bad. I've checked the capacitors because I have a HVAC background and I recognized those parts and on other postings they said to check them, but that's not the problem. I'm not sure how to check the diode if that's an issue. Please Help!!
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Originally Posted by: Gene  Diode or h.v assy giving off smell, trying to get to the mag to try to test. From what I've read if the diode is bad the mag is probably shot too. Also what kind of reading would I get from a good diode? My meter has a doide function. Do you have to check them in the right direction?
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Most common source of smell and/or smoke is a high voltage transformer. Diode, if it's shorted, will cause an excessive noise. Smells diode is very seldom as well as magnetron.
Shorted diode usually accompanied by shot magnetron in most of GE microwaves.
Gene.
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Originally Posted by: Gene Most common source of smell and/or smoke is a high voltage transformer. Diode, if it's shorted, will cause an excessive noise. Smells diode is very seldom as well as magnetron.
Shorted diode usually accompanied by shot magnetron in most of GE microwaves.
Gene. Not sure if this helps but about three seconds after starting a cycle the microwave would hum louder than normal. That's also why the first thing I tried was the capacitors. Other than that I'm not sure what to try next. I've got access to the transformer and mag now but not sure how to check. If you can give any pointers that would be great!
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If you do have an ohmmeter then check the diode, transformer windings and magnetron for continuity. The magnetron has to be tested for continuity between each terminal and ground. Any reading except "∞" means it's bad. You can find the instructions on how to test the diode in one of our previous posts: http://forum.appliancepartspros...19868-diode-testing.htmlGene.
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Originally Posted by: Gene If you do have an ohmmeter then check the diode, transformer windings and magnetron for continuity. The magnetron has to be tested for continuity between each terminal and ground. Any reading except "∞" means it's bad. You can find the instructions on how to test the diode in one of our previous posts: http://forum.appliancepartspros...19868-diode-testing.htmlGene. Checked the diode with the test you posted for me thanks. I have 6volts each way throught the diode. Looks like the diode is bad. Magnetron tested open between ground and all terminals, but the high voltage transformer had continuity between a wire that goes to the capacitor and ground. The rest were all open could that mean that the transformer is bad?
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Originally Posted by: Gene Thanks Gene I got the diode today and so far the microwave works great thanks for all the advice.
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You are welcome. I"m glad you were able to fix it.
Gene.
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