How to deal with leakage of electric soldering iron
The main reason for the leakage of soldering iron is caused by the leakage of soldering iron core.
The core of the soldering iron consists of a heating wire, an insulating support and an insulating layer, when the insulating layer is subjected to moisture, the use of a long period of time aging may occur to reduce the degree of insulation, resulting in the core of the soldering iron leakage. And then through the soldering iron heat transfer shell and soldering iron head out.
The handle of the soldering iron may also leak after excessive ageing.
After the soldering iron leakage, the problem is very serious, very easy to cause electric shock accident, to the person and to be repaired electronic and electrical equipment is very harmful, please replace the soldering iron core and the leakage parts immediately, if necessary, is the whole replacement.
Soldering iron leakage how to deal with
1, first will be adjusted to the multimeter AC voltage block, black pen grounded, red pen connected to the head of the soldering iron, observe the multimeter readings, if there are readings, proving that the soldering iron has a leakage of electricity, need to be repaired.
2, will be disassembled iron, looking for the internal grounding mark, and then along the grounding line to find the circuit board connected to the resistance, and measure its resistance, more than 5 ohms is judged to be burned need to be replaced (leakage of the vast majority of cases are damaged resistance), in addition to the resistance value is normal, please confirm that the soldering iron plug contact is good.
3, the burnt resistor removed, replaced by a new resistor, note that the resistance value of this resistor although 0 ohms, but he played a protective role, can not be short-circuited here!
4, after the replacement is completed, use a multimeter to confirm the resistance value between the resistor's far-earth measurement and ground.
5, after the completion of the repair and then use a multimeter on the soldering iron head and ground between the resistance value to confirm, if the resistance value within 2 ohms, proving that the repair is successful.
