How to deal with soldering iron leakage_Reasons for soldering iron leakage
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 subjected to humidity and used for a long period of time, the aging of the insulating layer may decrease the degree of insulation, resulting in leakage of the core of the soldering iron. And then through the soldering iron heat transfer shell and the soldering iron head.
The handle of the soldering iron can also leak after excessive aging and specialization.
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, 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 ground, red pen connected to the head of the soldering iron, observe the multimeter readings, if there are readings, prove that the soldering iron has a leakage, need to be repaired.
2, the soldering iron for disassembly, 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, replace the new resistor, note that the resistance value of this resistor is 0 ohms, but he plays 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.
