What is the reason why the electric soldering iron does not heat up after being powered on
An electric soldering iron that is not hot when energized is usually caused by the power cord falling off or the soldering iron core wire breaking. When encountering this fault, the R of the multimeter can be used × If the pointer of the multimeter does not move at both ends of the power plug measured at the LKN gear, it indicates an open circuit fault.
Firstly, check if there is an open circuit in the lead of the plug itself. If not, remove the bakelite handle and use a multimeter to measure the two leads of the soldering iron core. If the multimeter pointer still does not move, it indicates that the soldering iron core is damaged and should be replaced. The resistance value between the two leads of a 35W internally heated soldering iron core is about 1. Skfl. If the measured resistance value is normal, it indicates that the soldering iron core is good. The fault occurs in the power lead and the plug itself, and most of the faults are due to open circuit in the lead.
When replacing the soldering iron core, a new soldering iron core of the same specification should be inserted into the connecting rod, the lead wire should be fixed on the fixing screw, and the wiring post should be tightened. At the same time, attention should be paid to cutting off the excess part of the soldering iron core lead wire to prevent a short circuit between the two leads.
Electric soldering iron: A tool for electronic production and electrical maintenance, generally composed of a soldering iron head, soldering iron core, shell, wooden handle, power lead, plug, and other parts. Its main purpose is to weld components and wires.
The working principle of an electric soldering iron: After the power is turned on, the resistance wire of the soldering iron core generates heat, which is transmitted to the soldering iron head, and the soldering tin is melted by the soldering iron head for operation.
The electric soldering iron is not hot, and the main reason may be that the resistance wire in the soldering iron head is burnt out, which is a vulnerable component in the electric soldering iron. Just replace it with a soldering iron core. But it cannot be ruled out that there are faults with the power cord or plug. So when encountering an electric soldering iron that is not hot, you should first use a multimeter to check the power plug and power cord, and then check the soldering iron core after troubleshooting
