Maintenance Methods And Common Faults Of Soldering Iron
Common faults of electric soldering iron _ repair method of electric soldering iron
Common faults of electric soldering iron
1. The soldering iron does not heat up after being energized
When the soldering iron is energized, it is found that the tip of the soldering iron is not hot, usually because the power cord is off or the soldering iron core wire is broken. When encountering this fault, the R×lkn block of the multimeter can be used 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, check whether the lead of the plug itself is open. If not, remove the bakelite handle and measure the two leads of the soldering iron core with a multimeter. 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 internally heated 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 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 on the fixing screw, and tighten the terminal. At the same time, be careful to cut off the excess lead of the soldering iron core to prevent the two leads from short-circuiting.
2. The soldering iron tip does not eat tin
When the soldering iron tip is used for a period of time, it will not stick to the tin due to oxidation. This is the phenomenon of "burning to death", also known as not "eating tin". When there is a failure of not "eating tin", you can use fine sandpaper or a file to re-grind the soldering iron tip or file a new stubble, and then re-plated solder to continue using. Usually, you can also put the wire cleaning ball in the soldering iron frame box, and stick the working soldering iron tip on the cleaning ball a few times to remove the oxide of the soldering iron tip. In addition, you can also hold the handle of the electric soldering iron, immerse the oxidized soldering iron tip in a container filled with alcohol, take it out after 1 to 2 minutes, and the oxide will be completely removed. In order to reduce the phenomenon that the soldering iron tip does not eat tin, try not to energize the soldering iron when not soldering. If there are impurities on the soldering iron tip, you can soak a small piece of sponge with water and put it into a small iron box, and then gently pull the working soldering iron tip on the sponge a few times, and the soldering iron tip will be as bright as new.
3. The soldering iron tip is charged
In addition to the wrong connection of the power cord to the grounding wire terminal, there is another reason for the power failure of the soldering iron tip. When the power cord falls off the terminal of the soldering iron core, it touches the screw of the grounding wire, which causes the soldering iron tip to become charged. . This kind of failure can easily cause electric shock accidents and damage components. In order to prevent the power cord from falling off, check whether the crimping screw on the electric soldering iron handle is loose or missing. If it is loose or missing, it should be fitted in time.
4. There are pits on the soldering iron tip
　　When the soldering iron is used for a period of time, the soldering iron tip will have pits or oxidized corrosion layers, which will change the shape of the blade surface of the soldering iron tip. In this case, the oxide layer and pits can be filed with a file, and filed into the original shape, and then tinned, it can be reused.
　　
How to repair the soldering iron
1. Repair method that the soldering iron is not hot after power on
(1) When the soldering iron is energized, it is found that the tip of the soldering iron is not hot. Generally, the power cord falls off or the soldering iron core wire is broken. In such a situation, the R×lkn block of the multimeter can be used to measure the two ends of the power plug. If the pointer of the multimeter is It does not move, indicating that there is an open circuit fault.
(2) First check whether the lead of the plug itself is open. If not, remove the bakelite handle and measure the two leads of the soldering iron core with a multimeter. If the pointer of the multimeter still does not move, the soldering iron core is damaged and the soldering iron should be replaced. heart.
(3) The resistance between the two leads of the 35W internally heated soldering iron core is 1. About Skfl, if the measured resistance value is normal, it means that the soldering iron core is good, and the fault occurs in the power lead and the plug itself, and most of the faults are lead open circuit. Need to replace the soldering iron core, insert a new soldering iron core of the same specification into the connecting rod, fix the lead on the fixing screw, and tighten the terminal. At the same time, be careful to cut off the excess part of the lead of the soldering iron to prevent two leads Short circuit.
2. the repair method of the iron head with electricity
(1) In addition to the wrong connection of the power cord to the grounding wire terminal, there is another reason for the electrification failure of the soldering iron tip, that is, when the power cord falls off from the soldering iron core terminal, it touches the screw of the grounding wire. As a result, the soldering iron tip becomes charged.
In order to extend the service life of the soldering iron tip, the following points must be noted:
a. Frequently wipe the soldering iron tip with a damp cloth and a water-soaked sponge to keep the soldering iron tip well tinned and prevent the residual flux from corroding the soldering iron tip.
b. When soldering, rosin or weak acid flux should be used.
c. When the soldering is completed, the residual solder on the tip of the soldering iron should continue to be retained to prevent an oxide layer from being reheated.
(2) The occurrence of this kind of failure may easily cause electric shock accidents and damage components. To prevent the power cord from falling off, it is necessary to periodically check whether the crimping screw on the electric soldering iron handle is loose or missing. Match it in time.
3. Repair method for soldering iron tip without tin
For the repair method of soldering iron tip without tin, please read this article, or you need to replace the soldering iron tip
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