What causes the electric soldering iron to remain cold after being powered on?
If the soldering iron is not hot when it is powered on, it is usually because the power cord has fallen off or the core wire of the soldering iron is broken. When encountering this fault, you can use the R×lkn gear of the multimeter to measure both ends of the power plug. If the pointer of the multimeter does not move, it means that there is an open circuit fault.
First of all, check whether the lead wire of the plug itself is broken. If not, you can remove the bakelite handle, and then use a multimeter to measure the two leads of the soldering iron core. If the pointer of the multimeter still does not move, it means that the soldering iron core is damaged and the soldering iron core should be replaced. The resistance between the two leads of the 35W internal heating soldering iron core is about 1.Skfl. If the measured resistance is normal, it means that the soldering iron core is good. The fault occurs in the power lead wire and the plug itself, and most of the faults are lead wire open circuit.
To replace the soldering iron core, insert a new soldering iron core of the same specification into the connecting rod, fix the lead wire on the fixing screw, and tighten the terminal post. At the same time, pay attention to cut off the excess part of the soldering iron core lead wire to prevent short circuit between the two leads.
Electric soldering iron: A tool for electronic production and electrical maintenance. It is generally composed of a soldering iron head, a soldering iron core, a shell, a wooden handle, a power lead, a plug, etc. The main purpose is to weld components and wires.
The working principle of the 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 tip, and the soldering iron tip melts the solder to work.
If the soldering iron is not hot, the main reason may be that the resistance wire in the soldering iron tip is blown. This is a vulnerable part of the soldering iron. Just replace the soldering iron core. However, the failure of the power cord and plug cannot be ruled out. Therefore, when the electric soldering iron is not hot, first check the power plug and power cord with a multimeter, and then check the soldering iron core
