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Combi magnetron Siemens HTHB86P IGBT: magnetron functie is uitgevallen

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Combi microwave oven Siemens HTHB86P IGBT Replacement, Measure which of the IGBTs is faulty: passo 0, imagem 1 %32
Measure which of the IGBTs is faulty

  • Measuring with a multimeter in the 'diode' mode revealed that the left IGBT (the GT60N321) had indeed yielded its spirit: there was little resistance between collector and emitter.

  • To be sure that this was not a side effect of the surrounding electronics, I desoldered the IGBT pins from the PCB using a desoldering pump, and then measured again. The IGBT was indeed found to be defective.

Meten welke van de IGBT's defect is

Meten met een multimeter in de 'diode' mode wees uit dat de linker IGBT (de GT60N321) inderdaad de geest had gegeven: ik mat weinig weerstand tussen collector and emitter.

Om zeker te zijn dat dit geen neveneffect van de omringende electronica was, soldeerde ik de IGBT pennetjes met een tinzuiger los van de PCB, om vervolgens nogmaals te meten. De IGBT bleek inderdaad defect.

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