The choice of electric soldering iron power for repairing mobile phones
Soldering irons for mobile phone maintenance generally use tens of watts?
Generally 55W 60W 70W. Conventional selection of 60W is enough.
What kind of soldering iron should I use to repair a mobile phone?
The 936 constant temperature anti-static soldering station is fine.
The circuit board of the mobile phone is small, so there is no need for a powerful soldering iron.
Soldering irons for mobile phone maintenance generally use tens of watts?
Generally 55W 60W 70W. Conventional selection of 60W is enough.
What should be the temperature of the electric soldering iron when repairing a mobile phone
Electric soldering irons are divided into two types: external heating type and internal heating type. The general power of external heating type is relatively large.
Internal heat soldering irons are smaller and less expensive. Generally, 20W-30W internal heating electric soldering iron is used for electronic production. Of course, there is a 50W external heating electric soldering iron to be prepared. The internal heating type electric soldering iron has higher heating efficiency, and it is more convenient to replace the soldering iron tip.
The electric soldering iron is used for soldering. For the convenience of use, it is usually made into "solder wire". The solder wire generally contains rosin for soldering. Solder wire is composed of about 60% tin and 40% lead, and has a low melting point.
Rosin is a kind of flux, which can help soldering. People who play erhu must have it. I heard that you can also buy it in drugstores. The rosin can be used directly, or it can be prepared into a rosin solution, that is, crush the rosin, put it into a small bottle, and then add alcohol and stir well. Note that alcohol is volatile, remember to tighten the cap after use. You can put a small piece of cotton in the bottle, and when you use it, you can use tweezers to take it out and apply it on the printed board or components.
Note that there is a kind of solder paste (also called solder oil) on the market, which is a corrosive thing that is used in industry and is not suitable for electronic production. There is also rosin perfume on the market, not the rosin solution we use here.
The electric soldering iron is pinched in the hand, so be careful when using it. For a newly bought electric soldering iron, first check the resistance value between the plug and the metal case with a multimeter resistance file, and the pointer of the multimeter should not move. Otherwise it should be checked thoroughly.
In order to save costs, the manufacturer of the internal heating type electric soldering iron produced recently does not use rubber wires for the power cord, but directly uses plastic wires, which is relatively unsafe. It is strongly recommended to use rubber flex wire instead, because it is not as easy to be burned, damaged, short circuited or electrocuted as plastic wire.
Before using a new electric soldering iron, use a file to file the tip of the soldering iron. After the power is turned on, the color of the soldering iron tip will change for a while, which proves that the soldering iron is hot, and then put tin on the tip of the soldering iron with solder wire to make the soldering iron Not easily oxidized. During use, keep the tip of the soldering iron clean and ensure that there is always solder on the tip of the soldering iron.
When using a soldering iron, if the temperature of the soldering iron is too low, the solder will not be melted, or the solder joint will not be completely melted and will look unsightly and unreliable. Too high again will "burn" the soldering iron (it won't dip the tin despite being hot). In addition, the soldering time should also be controlled. If the soldering iron stays for too short a time, the solder is not easy to completely melt and contact well, forming a "virtual soldering". If the soldering time is too long, it is easy to damage the components, or make the copper foil of the printed circuit board Tilt.
Generally, a solder joint needs to be welded within one or two seconds. If it is not completed, it is better to wait a while and weld again. The electric soldering iron cannot move during soldering. You should first select the position where the solder joint is in contact, and then use the tin-coated surface of the soldering iron tip to contact the solder joint.
In the maintenance of mobile phones, the components on the circuit board are often replaced, requiring the use of a soldering iron, and the requirements for it are also high. This is because the components of the mobile phone adopt the surface mount process, the components are small in size, highly integrated, the printed circuit is fine, and the pad is small. If the soldering iron is not selected properly, it is easy to cause human faults during the soldering process, such as false soldering, short circuit or even soldering of the circuit board. Therefore, it is necessary to use a high-end soldering iron as much as possible, such as a constant temperature and anti-static soldering iron.
In addition, some large devices such as shielding covers need to use high-power electric soldering irons, so an ordinary 60W or more thick-tip electric soldering iron should be prepared.
