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Today I'll introduce a consumable used in the maintenance of an electronic product,rosin
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Rosin has two main functions in maintenance
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One is when the repaired motherboard has a short circuit
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We can find shorted components
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or a circuit with a shorted component connected
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Electronic components show signs of heating when they are short-circuited
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Use a soldering iron to melt the rosin
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and then put it over the surface of this component
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to heat
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The smoke emitted by the rosin will remain on the surface of the motherboard
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Energize the shorted circuit
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It is found that the surface of the component in a certain area is melted
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Suppose that the surface of this capacitor is melted
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If the surface of a single capacitor is melted
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it may be that the capacitor is damaged
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This is one of the functions
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Another function is to solder the chip
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A chip on this motherboard has been removed
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If we want to solder this chip
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You can also use rosin as flux to use
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There are two methods
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One is to heat with a hot air gun
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to melt the rosin
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Use tweezers to pick up the right amount of rosin
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Put it in the area that needs to be welded
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Blow to melt it
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This is one of the methods
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Here is another method
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Similar to the method of looking for short-circuit components
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Get a little rosin with a soldering iron
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Then go to the area that needs to be welded to smoke
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Smoke the area to be welded with a thin layer of rosin smoke
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To weld like that
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When rosin is used as a substitute for solder paste, it is not as easy to operate as solder paste
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Because rosin is solid when cooled
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crystalline solid state
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Then it will become more sticky when melted
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The amount applied is difficult to control
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And after the rosin has cooled
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This crystalline hard residue is on the perimeter of the chip
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Cleaning will be more difficult
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We mainly use it to find the hot spot of short circuit on the motherboard during maintenance
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when buying rosin
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We can check to see if there are any impurities inside
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Like this rosin I'm holding now
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The quality is not that good
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Like this area
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here
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and here
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and this
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You can clearly see some black stuff in there
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This rosin is not very good if used for welding
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The higher the transparency, the higher the purity
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The better the rosin material
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So much for rosin,thank you for watching
