What is the reason the iron does not produce heat after a period of inactivity?
1, not hot at all
If not hot at all, use the multimeter resistance block, measure the resistance of the power cord plug, must be ∞. Take the soldering iron apart, remove or peel off the power cord and the soldering iron core connection at the insulating sleeve, measure the resistance of these two points, if there is resistance, that the core of the soldering iron is good, is the problem of the power cord --- was yanked off or poor contact within the plug. If the resistance value is still ∞, it means that the core of the soldering iron is bad. The following are two common types of soldering iron core with external heat and internal heat.
Reasons for the damage of the chrome iron core: ● Drops and knocks caused by. Due to the chrome iron core of the heating wire are wound in the quartz or ceramic tube, these insulating medium is already brittle, once heated is even more brittle, can not withstand the knocking or dropping, otherwise, it will break, resulting in damage. ● The quality of the soldering iron itself is very poor, the electric wire was burned off. Now on the market, 3 to 5 yuan a soldering iron, the appearance and dozens of dollars a basic no difference, can be faked, but the quality is very poor, not durable. People often say that "one price line one cent goods", indeed.
2, can be hot, but not enough heat, can not melt the tin!
This phenomenon is characterized by black soldering iron head, melting solder. It seems that the heat is not enough, in fact, the iron head was "burned to death".
Appeared in this case, can still be heated in the soldering iron, repeatedly dipped in rosin in the top of the tin rub, until the soldering iron head plated with tin, that is, the color from black to bright. For the tip of the kind of long life soldering iron, it is strictly prohibited to file to file, because the alloy head will be filed off.
Soldering iron head, core are consumable materials, damage to this is a normal phenomenon, but master the correct use of the soldering iron, can life long service life.
