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Recognition and Measurement of Electronic Components

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In this lesson we're going to learn about the principle of inductor substitution

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After the chip inductor is damaged, it needs to be replaced with the same parameters and the same size

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For example, iPhone 11 backlight inductor,

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if it is damaged, you need to find the inductor parameters

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First find the inductor position number in the bitmap,

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and then jump to the schematic diagram

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The parameters of the inductor can be seen in the schematic diagram

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The inductance is 15 uH, the error value is 20%,

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the maximum current is 0.8A,

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the resistance value of the inductor is 0.585 ohms,

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and the specification of the inductor is 32251

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When replacing, find an inductor with the same parameters to replace

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If the parameters are different, the machine may not be able to start after replacement

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After the fuse inductor is damaged,

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you can find a fuse inductor as the same size to replace

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or you can use a wire to connect directly

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Precautions for replacing the inductors

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Chip large inductors cannot be directly connected with wires,

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only fuse inductors can be directly connected with wires

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In the actual maintenance, the inductor is easy to be damaged when disassembling and assembling

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You can buy a fortune small inductor on Taobao to replace it

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The size and parameters of the fortune small inductor are similar to the inductor around the CPU,

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and it can be directly replaced

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Like some special inductors, such as charging inductors,

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you cannot use small inductors to replace them,

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you need to buy inductors with the same parameters to replace them

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Ok, that's all for this video