Common errors made by soldering irons
1. The electric soldering iron does not generate heat after being powered on.
If the soldering iron does not heat up after being powered on, it means that the soldering iron has an open circuit fault. This fault may occur at the plug of the soldering iron in several places. The soldering iron core is broken, the lead of the soldering iron core is disconnected, and the power cord of the soldering iron is disconnected.
2. The soldering iron head does not eat tin.
The soldering iron tip does not eat. "Xi Pu saw that the newly purchased soldering iron tip was used directly without being repaired, resulting in the soldering iron tip not being tinned. The soldering iron tip used for a long time was not tinned, and the soldering iron tip was burnt and needed to be repaired.
3. The soldering iron is charged
A charged soldering iron is very dangerous for welders and may lead to serious electric shock accidents. Therefore, once the soldering iron is found to be charged, the power supply should be cut off immediately for inspection. There are several reasons why the soldering iron becomes electrified: the power cord of the soldering iron is connected to the terminal of the ground wire; the power cord falls off from the terminal of the soldering iron core and then touches the screw of the ground wire, causing the electrified power lead of the soldering iron head to become entangled and cause leakage; The power ground wire itself leaks electricity.
4. Pit appears on the soldering iron tip
When a soldering iron is used for a period of time, pits or an oxidized corrosion layer will appear on the soldering iron tip, causing the shape of the blade surface of the soldering iron tip to change. When encountering this situation, you can use a file to remove the oxide layer and pits, file them into their original shape, and then plate them with tin, and you can reuse them.
1. Repair method for soldering iron that does not heat up after being powered on
(1) When the electric soldering iron is powered on and it is found that the tip of the soldering iron is not hot, it is usually because the power cord has fallen off or the core wire of the soldering iron is broken. In such a situation, you can use the R×lkn block of the multimeter to measure both ends of the power plug. If the multimeter pointer If it doesn't move, it means there is an open circuit fault.
(2) First check whether the leads of the plug itself are open. 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 the soldering iron should be replaced. Heart.
(3) The resistance between the two leads of the 35W internal heating soldering iron core is 1. Around Skfl, if the measured resistance value is normal, it means that the soldering iron core is good. The fault occurs in the power lead and the plug itself. Most faults are lead wire breakage. If the soldering iron core needs to be replaced, insert a new soldering iron core of the same specifications into the connecting rod, fix the lead on the fixing screw, and tighten the terminal. At the same time, be sure to cut off the excess part of the lead of the soldering iron core to prevent two leads. short circuit.
2. Maintenance method of live iron head
(1) The cause of the soldering iron head's electrification failure is that in addition to the wrong connection of the power cord to the ground wire terminal, there is another reason, which is that after the power cord fell off the soldering iron core terminal, it hit the ground wire screw again. This causes the soldering iron tip to become charged.
(2) This kind of failure can easily cause electric shock and damage components. To prevent the power cord from falling off, you need to regularly check whether the crimping screw on the soldering iron handle is loose or missing. If it is loose or missing, remove it. Prepared in time.
