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In this lesson,

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we will talk about the search of the main power supply in the bitmap

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In the last lesson,

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we learned the related circuit on the main power supply on this side of the mainboard

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Then on the other side of the mainboard where the main power supply occupys,

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Where does the main power supply lead to?

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Check if the resistor is grounded, if it is a 0 ohm resistor

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If it doesn't have a ground pin and goes to a chip,

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we also need to consider the line it goes to

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For example, this resistor R1992, the first pin is the main power supply,

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it is connected to the chip U1902

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and these two capacitors through the second pin

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If they are damaged,

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they can also cause leakage in the main power supply line

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Let's go back again,

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In the same way,

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this main power supply goes to the chip 12106_NM through the resistor R2118

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Of course, this chip is not installed on Xiaomi phones,

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including these two capacitors.

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The main power supply leads to the chip U1904 and the two capacitors C1961, C1960

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We don't care about the chip that contains NM in the logo

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The main power supply leads to the RF part,

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which is branched to the U1901 chip and two capacitors C1918 and C1919

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through the zero-ohm resistor R1910

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If they are damaged,

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they will cause leakage of the main power supply line

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The main power supply also goes to the zero-ohm resistor R1935,

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the other end of which is connected to the chip U1903

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and the capacitors C1947 and C1946

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Here, the main power supply is connected to the chip U2105

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and the capacitors C2112, C2111 through the resistor R2106

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Here, the main power supply goes to the chip U6001 and the two capacitors around it

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At the same time,

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it goes to the chip U4200 and the nine capacitors around it

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It also goes to the chip U5301 and the capacitor C5201

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At the same time,

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it goes to the chip U5200 and the five capacitors around it

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Okay, let's move on to the top

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The main power supply leads to this chip U5303

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and two capacitors C5333 and C4312 around it

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It also leads here to R2511,

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through it to these five capacitors and the chip U2500

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The main power supply goes to the chip U2501

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and four capacitors around it through the resistor R2516

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The main power supply also goes to this socket,

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and also to the component A0151

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Is this a capacitor?

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One end of it is grounded and the other end is connected to the main power supply

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It may be a capacitor

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Switch it to the circuit diagram, the capacitor usually starts with C,

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but this one is unique, it is named after A,

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then it is also a capacitor

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If the capacitor is damaged,

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it will also lead to electrical leakage

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We click here, select it,

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and click Find Bitmap Component

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If the socket has not been touched, generally we don't need consider it

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Well, these are the lines that the main supply leads to on the side of the big power supply

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that is, we can quickly find all the components to which the main power supply leads through the bitmap

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Ok, that's it for this leeson