First, LED light leakage
If the leakage current of the LED lamp is too large, it will cause the LED to appear dead light. It can be assured that the dead light in this case will not affect the normal operation of other LED lights.
　　 Second, the broken line
That is the inside of the cable was disconnected and the LED lamp, the LED does not result in the supply voltage, which is an important cause of death light LED lamp.
Causes excessive leakage current of LED lamps
Because the static electricity damages the LED chip, it will make the LED chip  The junction fails, causing the leakage current to increase, making it a resistive device. We know that many high-precision electronic devices are afraid of the influence of static electricity. Therefore , it is necessary to pay attention to the electrostatic interference during the manufacture of LED lights. In order to effectively prevent the interference of LED lights in the process of production, it is recommended that When making LED lights, the staff should wear anti-static clothing, with an electrostatic ring and the electrostatic ring should have a good grounding effect.
Causes the disconnection of the cable inside the LED lamp
Cause internal LED light cable was disconnected and there are two main one is due to the production of the LED lamp of the production process is not perfect due to the LED lamp inside the connection line is disconnected, but also have the problem before the sealing step.
With the continuous development of the LED industry, LED merchants are also more and more, different manufacturers use different production processes when producing LED lights, which also leads to different yields of the products they produce. Of course, in addition to the production process, the production process is also an important reason that cannot be ignored. Therefore, if the merchant wants to make his product more qualified, he should pay attention to the details in each process, such as the chip soldering process. It can be said that most of the reasons for the LED lamp dead light are due to the virtual welding during the LED lamp welding process.
How to tell if the LED light is a dead light caused by the virtual welding
The LED lamp does not light the lighter LED lead heated to 200-300 deg.] C, remove the lighter, then with 3-volt button cell according to the positive and negative connections LED, LED lights if the temperature decreases and as the lead of the LED lamp When the light is turned off, it means that it is a dead light phenomenon caused by the virtual welding.
How to distinguish whether the LED dead light is due to a soldering problem or a soldering problem
We can weld the dead wire of the dead solder to a metal strip, soak it with thicker sulfuric acid, dissolve the external colloid of the LED , remove the colloid, take it out, and observe the welding of each solder joint under a magnifying glass or microscope. It is possible to find out whether it is a welding or a second welding problem. It is the parameter setting of the gold ball ball welder, or other reasons, in order to improve the method and process to prevent the phenomenon of the virtual welding from happening again. Â
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