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Next we clean the mainboard

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Put the dust-free cloth in the position to be cleaned, and then brush through the cloth with a brush

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In this way, the dirty things will be glued away by the dust-free cloth

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The welding oil will harden if you blow it more times.

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For this kind of stubborn welding oil, we first brush it with a brush,

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then put the dust-free cloth over, and then wash it through the cloth

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In this way, the board will be washed relatively clean

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There is still a little tin connection at this position,

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we use the same method to put the tin suction line on the tin connection position

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Ok, now we're done with the solder points

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Next, we add a layer of solder paste to the mainboard, and heat the mainboard with an air gun

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When the mainboard has a certain temperature, the solder paste will become relatively flat and uniform

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After applying the solder paste, carefully observe whether there is any residual dirt on the mainboard

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If there are some dirty things with relatively large particles, we need to clean them and re-add solder paste

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Now the mainboard is relatively clean, only a little bit of dust, no effect

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If the particle is relatively large, we have to clean it up

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After adding the solder paste, we put the plastic seat on the mainboard

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Wash the tip of the tweezers,

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there is some solder paste on the tip of the tweezers,

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it will stick to this seat, it is not easy to place

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Use a dust-free cloth to dip some washing water, and wipe the tip of the tweezers

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Hold the two sides of the seat with tweezers,

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and match the golden yellow contacts with the white solder points below

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Then we use the rotating air gun and adjust the temperature to 330-340 degrees

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Blow for two or three seconds, slowly remove the tweezers,

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and let the seat be placed on the mainboard smoothly

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Then we magnify a little bit to see the solder points on the edge of the mainboard clearly,

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and then heat them evenly

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If the solder points on the edge become flat, it means that the seat is welded

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The seat is slightly tilted to the right

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Take the tweezers and gently push it towards this side

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In this way, the seat has been welded