What are the causes of soldering iron head electrification failure and what are the solutions?
In addition to the wrong connection of the power cord to the ground wire terminal, the cause of the soldering iron tip's electrification failure is that after the power cord fell off the soldering iron core terminal, it hit the ground wire screw, causing the soldering iron tip to become electrified. . This kind of failure can easily cause electric shock and damage components. In order to prevent the power cord from falling off, you should always check whether the crimping screw on the soldering iron handle is loose or missing. If it is loose or missing, it should be replaced in time.
Induced voltage exists when AC current is connected, but good grounding is missing. If it is not grounded, just use a low-voltage soldering iron with an iron core transformer. If the LED is burned, there may be leakage or the induced voltage is too high.
The ground wire of the soldering iron tip is connected to the ground wire through the cold ground screw. If this ground wire is grounded separately without passing through the cold ground, and if the soldering station has two plugs, the ground end of the soldering station must be safely grounded. If it is a triangle plug, be sure to connect the ground wire of the triangle plug to ground. Use a soldering iron to solder LED lamp beads. It should be a 220V electric soldering iron and not grounded. The induced voltage on the soldering iron tip is very high, and the LED voltage is generally between 1.5-3.5, which can easily break down the LED chip.
The voltage on the soldering iron tip is a high-frequency induced voltage. There is a capacitance between the soldering iron tip and the coil, which is induced electricity. It is best to ground it. Sometimes it can break down light-emitting diodes and field effect tubes.
Although it is inductive, it can indeed damage LEDs (blue light is the most likely to be damaged), and some sensitive ICs can be damaged inexplicably. If there is no ground wire, you can find a way to make the potential of the human body and the soldering iron tip the same, which can also avoid damaging the components. Weld a wire to the metal barrel that is connected to the metal part of the soldering iron tip, and then weld a metal ring. Hook the metal ring on your finger during welding.
It should be noted that the soldering iron tip and the metal sleeve must be in good contact. If the soldering iron tip is burned for a long time, it seems that there will be no problem in contact with the metal sleeve. In fact, if the soldering iron tip is electrically suspended, there will still be an induced current. ,this point is very important.
