How to deal with electric soldering iron leakage
Reasons for electric soldering iron leakage
The main reason for the leakage of soldering iron is caused by the leakage of the soldering iron core.
The soldering iron core is composed of an electric heating wire, an insulation layer support, and an insulation layer. When the insulation layer is damp or aged for too long, the insulation level may decrease, leading to leakage of the soldering iron core. Then, it flows out through the heat transfer shell of the electric soldering iron and the soldering iron head.
The handle of an electric soldering iron may also experience leakage faults after excessive aging and specialization.
After the electric soldering iron leaks electricity, the problem is very serious and can easily cause electric shock accidents. It poses great harm to people and electronic and electrical equipment to be repaired. Please immediately replace the soldering iron core and leakage components, and if necessary, replace them as a whole.
How to deal with electric soldering iron leakage
1. First, set the multimeter to the AC voltage range, with the black lead grounded and the red lead connected to the soldering iron tip. Observe if the multimeter shows any readings. If there are any readings, it indicates that there is leakage in the soldering iron and needs to be repaired.
2. Disassemble the electric soldering iron, find the internal grounding mark, and then follow the grounding wire to find the resistance connected to the circuit board. Measure its resistance value, and if it exceeds 5 ohms, it is determined to be burnt out and needs to be replaced (in most cases of leakage, this resistance is damaged). In addition, if the resistance value is normal, please confirm whether the contact of the soldering iron plug is good.
3. Remove the burnt out resistor and replace it with a new one. Note that although the resistance value of this resistor is 0 ohms, it serves as a protective measure. Do not short-circuit this area!
5. After the replacement is completed, use a multimeter to confirm the resistance value between the far-ground measurement of the resistance and the ground.
6. After the repair is completed, use a multimeter to confirm the resistance value between the soldering iron tip and the ground wire. If the resistance value is within 2 ohms, it indicates successful repair.
