1, the surface treatment of the charger circuit board is generally the use of coating rosin process, may be the copper surface of the PCB board its rosin has been destroyed or not coated, resulting in the copper surface of the solder pad is oxidized, so that it can not be soaked tin. Is there any leakage of flux before dipping?
2, IC pin is too dense, 2; The pad is too large, 3; The temperature is not enough, 4; Incorrect soaking method, 5; tinThe quality of itself is not up to standard, it is suggested that: when dipping tin, when starting the plate, the temperature is almost set at 280, but the tin stove is different, the temperature displayed is not the same, more pay to try it.
3, the plug-in effect of soldering on the circuit board with tin furnace (dip welding) is not good, many are virtual welding, and the tin is uneven. 160*320 circuit board can be welded. Dip welding: Dip welding is a multi-point welding method that is widely used in the plug-in process and SMT red rubber surface. By hand or machine, a large amount of tin is boiled and the welding surface is immersed to make the solder spot on the tin.
4, with the right hand with the clipDamaged and deformed. As long as the welding head can fully contact the solder joint, the heat can be transferred. In addition, choosing the right welding head also helps in heat transfer.
The newly bought soldering iron is first energized to heat, take a little longer to remove the protection of the oil on the new iron, etc. When the surface of the soldering iron head becomes black due to high heating temperature - oxidation, use sandpaper to remove the oxidation layer (at this time can not be powered off), immediately stick on the solder paste or rosin at the same time to melt the "solder", this step is called "eat tin", after this "eat tin", The soldering iron will stick to the tin.
Can be fast and efficient treatment method is: put in alcohol when heatingIt should be put in when it is heated, and it should be put in when it is cold, and then turn on the power supply of the welding table. When the temperature of the bubble should use the lowest gear, the temperature is 100-200℃, not more than 200℃.
1, yes, I have done, but the garbage machine, not afraid of breaking, so bold. If your machine is good, don't risk it. Of course, you can also get thin pieces of copper from other places (I used to do this on old game cards) and glue them on and weld them.
2. Ok. Good anti-corrosion: tin platingThe gold finger can effectively prevent oxidation, corrosion, corrosion and corrosion, and extend its service life. High electrical conductivity: Tin is a good conductive metal, gold finger after tin plating can improve its electrical conductivity, reduce resistance, improve signal transmission speed and stability.
3, hello: bad, dropped on the poor contact can only be replaced. Will encounter a lot of beautiful scenery or things, but as time passes, slowly into desolation.
4, gold finger does not use lead tin coating, generally use nickel gold coating, otherwise it is not called gold finger. Gold finger coating requirements: nickel plating layer thickness is notLess than 0.003mm, gold layer thickness is not less than 0.002mm.
5, so it depends on the character, I have two memory gold fingers at home are burned, but you can boot can be used normally, because the burn is the ground on the gold finger. If your memory can not open the machine, had to take to repair, chip level repair point, if not serious refill tin may be used. Not if it's serious, and you certainly don't have a warranty on this.
6, gold finger is an important part of the memory, its conductive contact plate is arranged like a finger, the surface is also plated with a layer of gold. Although the price of gold is higherExpensive, but the performance and quality of Goldfinger are excellent, so in some high-performance servers/workstations will still choose to use gold-plated goldfinger. Because gold is more expensive, many memory chips are now plated with tin instead of gold fingers.
Soldering iron can not stick tin reasons Wireless soldering : Electric soldering iron use time is too long will produce copper oxide wireless soldering tin, which makes it difficult to stick tin. Generally, a knife is used to remove the copper oxide, reduce the clean copper, then dip it with rosin, and finally solder it by sticking tin. In this case, the iron head loss is serious and can not effectively remove copper oxide, greatly reducing the utilization rate.
I am doing electrical industry wireless charging tin ; Copper wire must be solderable. Master Wireless tin charging You try Wireless tin charging ; Use a paper towel to place copperLine wiped clean; (Copper wire is not allowed to have water and oil) until the electric soldering iron temperature is appropriate; Stained with rosin smoke; Indicates that the temperature reaches. The tin wire is then very convenient to use.
Rewelding is good. The reason why the soldering iron head is not stained with tin: the selection temperature is too high, which is easy to cause severe oxidation of the tin surface of the soldering iron head. Do not eat tinned noodles before use. Use incorrect or defective cleaning methods. Using an impure solder or flux break in the wire. When the operating temperature exceeds 350 ° C, and the welding is stopped for more than 1 hour, the amount of tin on the head of the lead-free soldering iron is too small.
Using the soldering iron for a long time will produce oxygenCopper, resulting in difficulty in sticking tin. In general, the copper oxide is removed with a knife, the clean copper is reduced, and then dipped in rosin, and finally welded with tin welding.
Soldering iron head does not stick to tin reason: the selection temperature is too high, easy to make the soldering iron head with tin surface intense oxidation. Do not eat tinned noodles before use. Use incorrect or defective cleaning methods. Using an impure solder or flux break in the wire. When the operating temperature exceeds 350 ° C, and the welding is stopped for more than 1 hour, the amount of tin on the head of the lead-free soldering iron is too small.