What is the reason why the electric soldering iron does not heat up after being energized?
What is the reason why the electric soldering iron does not heat up after being energized? If the soldering iron is not hot when it is powered on, it is usually because the power cord is dropped or the core wire of the soldering iron is cracked. When encountering this fault, you can use the R×lkn block of the multimeter to measure the two 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, you should 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 type 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 and the plug itself, and most of the faults are lead wire breakout.
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 remaining part of the soldering iron core lead wire to avoid short circuit between the two leads. .
Electric soldering iron: A tool for electronic manufacturing and electrical repair, usually composed of a soldering iron head, a soldering iron core, a shell, a wooden handle, a power lead, and a plug number, and is mainly used for welding components and wires.
The working principle of the electric soldering iron: After the power is turned on, the resistance wire passing through the soldering iron core generates heat, which is transmitted to the soldering iron tip, and the soldering iron tip melts the solder for operation.
The soldering iron is not hot. The main reason may be that the resistance wire in the soldering iron head is blown. This is a vulnerable part in the soldering iron. Just replace the soldering iron core. But it can't clean up the defects of power cords and plugs. Therefore, when the electric soldering iron is not hot, first use a multimeter to check the power plug and power cord, and then check the soldering iron core after cleaning.
