Electric iron failure and maintenance of electric iron common faults and troubleshooting methods

January 05, 2023

Abstract: In the process of using the soldering iron, sometimes the soldering iron head is charged, the soldering iron is not hot after being energized, the soldering iron tip does not “eat tin” or pits appear, etc. How to eliminate the repair of the soldering iron fault? Today, Xiaobian introduces the common faults and troubleshooting methods of electric soldering iron. Let's take a look at it.

[Electric soldering iron fault repair] electric iron fault and maintenance soldering iron common faults and troubleshooting methods

1. Electric iron troubleshooting

The use of the soldering iron is faulty, learn to repair the heart is not panic, the soldering iron is connected to the wrong line, or the phase line falls on the iron, in order to prevent the power cord from falling off, the compression screw has a protective array.

The electric iron does not heat up, the wire should not be forgotten. Check the two leads on the same meter. If the resistance is normal, replace the core and tighten the wire.

The soldering iron oxidizes the non-stick tin, re-polishs and replaces the new one, prevents oxidation and impurities, cleans the soldering iron head, and the pits are trimmed, and the file is shaped into the original shape.

2. Electric iron troubleshooting method

In the process of using the soldering iron, the soldering iron head is often charged, the heat is not hot after the power is on, and the soldering iron head does not eat tin. The JS28F512M29EWLA beginner should find and eliminate common faults.

(1) The soldering iron head is charged. The cause of the power failure of the soldering iron head is that, besides the power cable is wrongly connected to the grounding wire terminal, there is another reason that when the power cable is detached from the soldering iron terminal, it is hit by the screw of the grounding wire, thereby causing the soldering iron to be charged. . Such failures can easily cause electric shock and damage components. In order to prevent the power cord from falling off, check whether the crimping screw on the soldering iron handle is loose or missing. If it is loose or missing, it should be properly equipped.

(2) The soldering iron is not hot after being energized. When the soldering iron is energized, it is found that the soldering iron is not hot, generally the power cord is off or the core of the soldering iron is broken. In the event of this fault, the Rxlkn block of the multimeter can be used to measure both ends of the power plug. If the pointer of the multimeter does not move, it indicates that there is an open circuit fault. First, check whether the lead of the plug itself has an open circuit. If not, remove the bakelite handle and measure the two leads of the soldering iron with a multimeter. If the pointer of the multimeter still does not move, the soldering iron is damaged and the soldering iron should be replaced. The resistance between the two leads of the 35W internal heat-type soldering iron is about 1.Skfl. If the measured resistance is normal, the soldering iron is good, the fault occurs in the power lead and the plug itself, and most of the faults are lead disconnection.

To replace the soldering iron core, insert a new soldering iron of the same specification into the connecting rod, fix the lead wire on the fixing screw, and tighten the binding post. At the same time, be careful to cut off the excess part of the soldering iron core lead to prevent the two lead wires from being short-circuited.

(3) The soldering iron tip does not “eat tin” or pits appear. When the tip is used for a period of time, it will not be tinned due to oxidation. This is the phenomenon of "burning death", also known as not eating tin. When there is a failure to "eat tin", you can use a fine sandpaper or enamel to re-grind the tip or take out the new one, and then re-plating the solder to continue using it. In normal times, the wire cleaning ball can also be placed in the soldering iron frame, and the working iron tip can be removed on the cleaning ball for a few times to remove the oxide of the soldering iron. In addition, the electric iron handle can be held by hand, and the oxidized iron tip is immersed in a container containing alcohol. After 1~2 minutes, the oxide is completely removed. In order to reduce the occurrence of tin phenomenon in the soldering iron tip, you should try not to energize the soldering iron when not soldering.

If there is any impurity on the soldering iron tip, a small piece of sponge can be soaked in water and put into a small iron box. Then the working iron tip is gently pulled back and forth on the sponge, and the soldering iron head will be bright as new.

When the soldering iron is used for a period of time, the soldering iron tip will have a pit oxidized corrosion layer, which changes the shape of the soldering iron tip. In this case, the oxide layer and the pit can be removed by a trowel and then cut into the original shape, and then soldered, and then reused. In order to reduce the occurrence of pits in the soldering iron tip, a less corrosive flux should be used as much as possible.