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Hello everyone, in this lesson we will talk about the welding of chip capacitor resistors

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There are two ways to weld chip capacitors and resistors: air gun welding and soldering iron welding

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Capacitors that are relatively large and open around them can be soldered with a soldering iron

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However, small capacitors like this one that are relatively dense and small in size need to be welded with an air gun

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Let's take a look at the soldering iron first

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Here we are using a knife-type soldering iron tip

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First apply a little tin to the knife surface above the knife-shaped soldering iron tip

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After coating the tin, touch the pads at both ends of the capacitor at the same time to continuously heat the pads

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After the tin on the pad has melted, remove the soldering iron,

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and the capacitor can be brought down

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This is how to remove a capacitor with a soldering iron

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Next, let's take a look at the method of using a soldering iron to install a capacitor

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The steps are still the same

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Let's tin the tip first

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After adding the tin, use the tip of the soldering iron to stick the capacitor and place the capacitor on the pad

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Make the tin on the soldering iron touch the pads at both ends of the capacitor at the same time

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When the tin on the pad has melted, remove the soldering iron

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At this time, the capacitor is soldered on.

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If the welding is not very straight, you can do it again until the capacitor is welded

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After welding, we clean up the welding marks

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After cleaning, let's observe the welding effect of the capacitor

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Confirm that there is no tin tip, no deviation, and no false soldering

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After confirmation, the capacitor is soldered.

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This is how to use a soldering iron to desolder the chip capacitor

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Next, let's take a look at the welding of this capacitor.

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The size of this capacitor is relatively small, and the surrounding area is very dense

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Capacitors like this cannot be soldered with a soldering iron,

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but can only be soldered with an air gun

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The method of welding with air gun is also very simple

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First use tweezers to hold the capacitor to be soldered

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After clamping firmly, heat the capacitor with an air gun

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Be sure to pay attention to the air gun blowing vertically when heating

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Here we are just for the convenience of demonstration, so blowing diagonally

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The temperature of the air gun is adjusted to 450 degrees, and the wind speed is adjusted to 60

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Keep heating the capacitor

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After the pad of the capacitor is melted, we can directly remove the capacitor with tweezers

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Be careful when removing the capacitor, use tweezers to stabilize the capacitor before blowing it

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Otherwise, the tin of the surrounding components will be blown

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If your hand is not steady, it may blow the surrounding components off

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Therefore, it is recommended to clamp the capacitor with tweezers before blowing it.

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Next, let's take a look at the method of using an air gun to install a capacitor

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Apply a little flux to the pad first

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Then use an air gun to continuously heat the pad

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After the tin on the pad is completely melted, use tweezers to pick up the capacitor and place it on the pad

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Then remove the air gun

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Remove the tweezers after the tin on the pad solidifies

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In this way, the capacitor is not easy to be blown away.

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If it is not soldered well, or the soldering is crooked,

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we can add some soldering oil and blow it with an air gun to make the capacitor return to its place

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Ok, you can see it's in place

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Even if the capacitor is soldered after returning to its position

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This is the soldering method of two-pin chip components such as chip capacitors