Question about GE Spacemaker JVM1640SJ Microwave Oven

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How to test a diode

I want to see if the diode is good for my GE SPACEMAKER XL1800 is good.

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  • richhall19 Jan 03, 2009

    I read on the internet that if I test continuity and get a signal changing polarity in both directions it shows the diode is shorted. If I get no signal from eather end when changing polarity it shows the diode is open. Thay then said that the dioed should be replaced. I used a continuity tester with a small 9volt battery like used in a smoke alarm. I

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To test a diode, first remove it, then use a test meter with a diode check facility. Test component first one way around, then the other. It should give a 1 in one position, and 0 in the other if all is ok.

This is the correct way to test a diode.

Posted on Jan 03, 2009

  • Richard Perkins
    Richard Perkins Jan 04, 2009

    Hi,

    You realise that by rating this as helpful, you're actually pulling my rating down from 88% ?



    Did I misdirect you?

    Was the information wrong in any way?



    Would you reconsider your verdict please.



    Yes you can use a higher voltage, and check diodes in this way, but you can also blow them up in the process - giving a voltage in both directions. Using a very low voltage logic device - there is no risk of this.

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