The hot air gun manufacturer tells you the disassembly and welding of the small components

Hot air gun manufacturers tell you small element removing and welding:

1. guidance

Small mobile phone components in the circuit mainly comprises a resistor, capacitor, inductor, transistor etc.. The mobile phone has the advantages of small volume, powerful function, complex circuit, determines these elements must be used to install the patch (SMD), through hole components of chip components compared with the conventional SMD components installed high density, reduce the distribution of lead, enhance the ability to engage in electromagnetic interference and radio frequency interference. For these small components, generally using a hot-air gun for removing and welding (welding can also use electric iron), in removing and welding must certainly grasp the wind, wind speed and wind direction, improper operation, not only the small element to blow away, "and will bring disaster to the fish pond", the small element is blowing around the position or blow away.

2. operation

(1) disassembly of small components

Before using a hot-air gun removing small components, will spare batteries on the circuit board to remove the mobile phone (especially from the demolition of the standby battery element is close, otherwise, the backup battery) is easy to heat explosion, pose a threat to human body.

Fix the circuit board on the maintenance platform, turn on the magnifier with lamp, and carefully observe the position of the small components that want to be removed.

Use a small brush to clean up around the small impurity element, to add a little loose perfume small components.

Install the fine nozzle of the hot air gun, open the hot blast gun power switch, adjust the hot blast gun temperature switch in 2 to 3 files, the wind speed switch in 1 to 2 files.

One hand clamps the small element with one finger, and the other hand holds the handle of the hot blast gun, so that the nozzle is kept perpendicular to the small component to be removed, the distance is 2 to 75px, and the heater is uniformly heated along the small element, and the nozzle can not touch the small component.

The small element around the melting solder after the finger clamp will remove small components.

(2) welding of small components

Clamp the small components which are to be welded to the welding position with the fingers, and pay attention to setting them straight and not to deviate from the solder joints. If the lack of solder joints, available iron filling in the solder joints with solder.

Open the hot blast gun power switch, adjust the hot blast gun temperature switch in 2 to 3 stalls, wind speed switch in 1 to 2 stalls.

The nozzle of the hot air gun is kept perpendicular to the small component to be welded, and the distance is from 2 to 75px, and the heater is uniformly heated along the small element.

For small components around the solder melting after remove hot air gun nozzle.

Remove the finger pliers after the solder cools.

With anhydrous alcohol will clean up around the small components of rosin.