What could be the reason why the iron does not heat up after the power is on?
What's the reason why the soldering iron doesn't heat up after being powered on? The soldering iron does not heat up when it is powered on, usually because the power cord has fallen off or the core wire of the soldering iron is cracked. When encountering this defect, you can use the R×lkn block of the multimeter to measure both ends of the power plug. If the multimeter pointer does not move, it indicates that there is an open circuit defect.
First of all, you should check whether the leads of the plug itself are 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 multimeter pointer still does not move, it means that the soldering iron core is damaged and should be replaced. . The resistance between the two leads of the 35W internally heated soldering iron core is about 1.Skfl. If the measured resistance value is normal, it means that the soldering iron core is good. The defects appear in the power leads and the plug itself. Most defects are lead wire breakage.
To replace the soldering iron core, insert a new soldering iron core of the same standard into the connecting rod, fix the lead on the fixing screw, and tighten the terminal post. At the same time, be sure to cut off the remaining part of the soldering iron core lead to avoid short circuiting the two leads. .
Electric soldering iron: A tool for electronic manufacturing and electrical repair. It usually consists of a soldering iron head, a soldering iron core, a shell, a wooden handle, a power lead, and a plug part. It is mainly used for welding components and wires.
The working principle of the electric soldering iron: After the power is turned on, the heat is generated through the resistance wire of the soldering iron core and transferred to the soldering iron head, which melts the solder to perform the operation.
If the soldering iron is not hot, the main reason may be that the resistance wire in the soldering iron head is burned out. This is a vulnerable part of the soldering iron. Just replace the soldering iron core. However, defects in power cords and plugs cannot be eliminated. Therefore, if the soldering iron 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 cleaning.
