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We have completed the chip reballing and pads repairing,

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then we will start to install the chip

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First, clean the pads

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Then blow it with the air gun and add some flux

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We don't care if the idle pads break off

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This board is very bad and there are lots of idle pads that broke off

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When welding, refer to the drawing for pin 1 of the chip,

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or refer to the mainboard of the same model

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We use a straight air gun to blow the chip back to its original position when welding,

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the temperature is 450 degrees, and the air volume is minimum

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Ok, it moved

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It's already installed

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Then we'll install another chip

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The mainboard has a certain temperature just after heating,

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we don't need to heat it again,

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because the PCB conducts heat very quickly

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There is a little bit of dirt on the pad, take it off

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Do not reverse the direction of the chip

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There's a little bit of dirt stuck to the corner, take it off

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Let's blow it back with a straight air gun,

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the temperature is 450 degrees, and the air volume is minimum

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After heating to 450 degrees, we will reduce the air volume

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It was reballed medium melt solder,

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which melts faster than the surrounding components,

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so you don't need to worry about the surrounding tin extrusion

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OK, it's back in place

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For the tin reballing and pad repairing , you can refer to

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the previous videos, I will not demonstrate it here

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Then we weld the last chip

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First add some flux

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Check if there is any dirt stuck on the back of the chip

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nothing dirty

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Ok, it's obvious that the chip is back in place

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In this way, we have already demonstrated the different

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disassembly methods of this small glued chip

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and the pad processing

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When we repair, we need to choose the corresponding chip removal method

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according to the different layout of the components on the mainboard