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Recognition and Measurement of Electronic Components

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This video mainly explains the method of judging the quality of inductors

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The first step is to observe whether there are obvious cracks or burnt traces on the appearance of the inductor

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As shown in the picture, the inductor is broken or burnt,

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which means that the inductor has been damaged

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In the second step, if the appearance is not obviously damaged,

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we use a multimeter diode or buzzer range to measure the two ends of the inductor

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If the value shows 0, it means that the inductor is normal

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If OL or 1 is displayed, it means the inductor is damaged

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The multimeter can only roughly judge the inductor

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To make an accurate judgment, we use the third step,

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using the inductor meter to measure the inductance

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When the measured value is consistent with the value marked in the drawing,

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it means that the inductor is completely normal

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In actual maintenance, generally only use a multimeter to judge

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If you suspect damage, you can directly replace it

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In actual maintenance, it is rare to remove the inductor to judge whether it is good or bad

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Generally, we use the diode range of a multimeter to measure the diode value

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to judge whether the inductor is good or bad

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For example, the third pin of the inductor L8051 is connected to the display seat,

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and the value is 450

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When we measure the other end of the inductor,

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if the value also shows 450, it means that the inductor is normal

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If the values at both ends of the inductor are not the same,

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it means that the inductor is damaged

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For example, when measuring inductor in some places,

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there is no connection point,

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we can view the connected components at both ends of the inductor through the bitmap

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If the values of the components connected at both ends are also the same,

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it means that the inductor is normal

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OK, that's all for this video