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This lesson is about the maintenance for the prompt of the battery anomaly

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In the first step, we need to measure the ground value of the ID of the battery holder

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We should pay attention to the components in series in the process of the ID pin leading to the chip

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Different brands of mobile phones have different ID codes

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If the ground value is abnormal, we need to replace or resolder the charging chip or power chip

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Also note here, for example, Xiaomi has a MOS tube connected in series

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If there is a problem with this MOS tube, it will also cause an abnormal ground value

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For example, if the ground value is infinite, it means that the line of the MOS tube is open

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When measuring the ground value, the measurement point is generally two of the four pins

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For some mobile phones, the measurement point is on a pin

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If there is no abnormality in the ground value, it is necessary to detect the charging chip

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Because the detection pin leads to the charging chip or power chip

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Check whether there are corroded components around the charging chip or power chip

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The detection must be purposeful,

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that is, only look at the ID pin of the battery or the chip that the detection pin leads to

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The components in the string circuit should also be checked

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Corroded resistors need to be re-soldered, and if re-soldered, they must be replaced

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There are also MOS tubes in series that can be short-circuited,

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short-circuiting the D pole and the S pole to troubleshoot

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This is the second step

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If in the second step, there is no component corroded by water,

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and there is still an abnormality after replacing the chip,

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it is time to check the battery and replace it with a new one

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In fact, in the first step,

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we can directly change a battery to eliminate the fault that indicates abnormal contact

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The above steps have been done, but there will still be an abnormal prompt

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In this case, check the chip or resistor connected to the detection pin

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The chip connected to the detection pin is usually a charging chip or a power chip

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This is the maintenance for the prompt of the battery anomaly

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That's all for this lesson