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Next, we de-glue the motherboard and the chip

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Rotary-air hot gun

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About 230 degrees

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Air volume level 3-4

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Blow the middle area first

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to see if the pads have melted

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You can also use a knife to test around here

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If you see the solder is scrapped flat

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It means that the solder has melted

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Then we'll scrap around

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Blade flat

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Gently flatten back

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Don't stand too much

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It is easy to scratch the motherboard when scraping

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Don't push forward

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or with the tip of the blade

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It's not okay

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Just flatten backward like this

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As the position of the edge,the tip of the knife must touch it

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Scrape clean

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If the middle is clean but the edges are not

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The chip cannot be welded

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When it's done

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Remove the hot air gun

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The blade goes back and forth to scrape

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Take away the dirt left on the motherboard

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Then scrape the dirt onto this fixture

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Clean it up

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The top part

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When we scrape to the bottom, we can't scrape the edge

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So we're going to reverse the direction

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The area where the blade passes must be smoothed

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Scrape the pads flat to indicate that the glue has been scraped clean

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When you scrape, you may find that there are a lot of pads will be taken away directly with the blade

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You don't need to worry about it

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99% of them they are idle pads

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Even if you scratched off some pads, that's because it has been fallened hard before

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There is no problem with the method like mine

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It's impossible to scratch off the pads

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No exposed copper

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Pads are not tha much fragile

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If there is a large area of the exposed copper

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By that time,if there is a or some pads off, which may be because of your scrapping technique

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We scrape the chip in the same way

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It's easier than motherboard

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Because there are no other components around the chip to prevent us from operating

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As always

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At the end, scrape it back and forth with a knife

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Take away all the solder and glue on this