Question about DeLonghi MW 605 Convection/Microwave Oven

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Fuse is always blown

Have a good day Sir, I have a DeLonghi Microwave model MW605. Right now it does not work, it always blown up the fuse. I inspect high voltage Capacitor, it is good. I check the high voltage diode, it is also good. Only the resistor across the terminals of the capacitor it shows infinitive when measured by Megohm. Does it cause the fuse blown up?. I saw it said in Capacitor label, the resistor is 10 Megaohm? I also measured the Magnetron between the two terminals, it is 0.5 Ohm and terminals to body is infinity. Appreciate much if you can give me some hint to repair my microwave. Thank you

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Re: Fuse is always blown

Thank you very much for your hint. I changed the transformer and it works now. I feel happy when the problem solved by my hand with your great help. You are really very good expert in both theory and practice. Best regards, Cuoitoet

Posted on May 12, 2007

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Re: Fuse is always blown

When does the fuse blow? If it blows the fuse as soon as you hit START, you probably have a high voltage capacitor shorting. Does it blow a few seconds after you press START? If so, then it may be a bad high voltage transformer. Does it blow when you open or close the door? If so, it may be a bad door swithc or a misaligned or damaged door or door switch mount. Please give more details.

Posted on May 08, 2007

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