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In this lesson,

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we talk about how to find the positive electrode of the battery in the bitmap

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Here, the two capacitors C5513 and C5518 will cause the electrical leakage

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The chip U5500 will also cause the electrical leakage

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If the two capacitors including C5413 and C5458

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are corroded or damaged by water,

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it will also cause electrical leakage

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The chip U5200 will also cause the electrical leakage

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In the actual maintenance, the quick method is that

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the positive electrode of the battery has leakage,

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we generally first find the capacitor that is corroded by water on this line,

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remove it, and test it,

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if the fault disappears

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indicating that the cause of the fault has been found,

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and the fault can be repaired

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We can remove one or two capacitors

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This capacitor connected to the power supply is a filter capacitor,

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and only 3 capacitors are needed in a line

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Of course, you can also find a good capacitor to replace it

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If the capacitor is removed and it still leaks,

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we have to consider removing the chip on the lline

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There are two chips on the line, U5200 and U5500

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We remove the two chips respectively

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When we take off a chip and test it, it no longer leaks,

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it means that there is a problem with the chip,

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it is damaged and leads to the electricity leakage

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So how do we fix it?

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We buy a good chip, or take a good chip from the disassembly board,

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install it on the mainboard, and we can fix the fault

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This is how do we usually fix the problem of the electrical leakage of the battery positive electrode

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Ok, that's it for this lesson