How to deal with leakage from the soldering iron
Reasons for soldering iron leakage
Soldering iron leakage cause is mainly caused by the soldering iron core leakage.
The core of the soldering iron consists of a heating wire, an insulating support and an insulating layer, and when the insulating layer is humid and aged for a long time, the degree of insulation may decrease, resulting in leakage of the core of the soldering iron. 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 electric leakage of the soldering iron, 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!
5, after the replacement is completed, use a multimeter to confirm the resistance value between the resistor's far-earth measurement and ground.
6, 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.
