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Introduction |
| Advance warning: a microwave oven uses high voltage. Disassembling it, if you are not knowledgeable, can lead to life-threatening situations, even quite some time after the plug has been unplugged. | | This microwave oven was presented to me for repair by my sister. After years of faithful service, the unit had completely failed. My brother-in-law discovered that the main fuse in the unit had blown and replaced it, but the new fuse had a particularly short life.
Several tips from colleagues have been incorporated into this report. | | | A microwave tube needs high voltage to function. Some microwaves generate this high voltage (about 8000V) by means of a large transformer. This microwave, however, does so in a different way, namely by means of a so-called "inverter," a circuit board equipped with a relatively small transformer, and several switching semiconductors. My brother-in-law discovered that the fuse no longer blew when he disconnected the inverter board. |
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