Failure analysis and maintenance of led strip lights
There will occasionally be some small failures when using led strips, especially if they are used for too long, many parts are slowly aging, and sometimes there will be short circuits. Then, when you encounter a failure, what should you do?
1. Static electricity burns out
Because LED is an electrostatic-sensitive component, if the electrostatic protection work is not done well during the production process, the LED chip will be burned out due to static electricity, which will cause the false death of the LED strip.
Solution: Strengthen electrostatic protection, especially the soldering iron must use an anti-static soldering iron. All employees who come into contact with LEDs must wear anti-static gloves and static rings in accordance with regulations, and tools and instruments must be well-grounded.
2. Short circuit
Many LED strips emit poorly because the LED pins are short-circuited. Even if the LED lights are changed, they will short-circuit again when they are powered on again, which will burn out the LED chips.
Solution: Find out the real cause of damage in time before repairing, do not replace the LED rashly, repair or directly replace the entire LED strip after finding the cause of the short circuit.
3. High-temperature damage
The high-temperature resistance of LED is not good. Therefore, if the welding temperature and welding time of the LED is not well controlled during the production and maintenance process, the LED chip will be damaged due to ultra-high temperature or continuous high temperature, which will cause the LED strip to be damaged. Feign death.
Solution: do a good job in the temperature control of reflow soldering and soldering iron, implement a special person responsible, and special file management; the soldering iron uses a temperature-controlled soldering iron to effectively prevent the soldering iron from burning the LED chip at high temperature. It should be noted that the soldering iron cannot stay on the LED pin for 10 seconds. Otherwise, it is extremely easy to burn the LED chip.
4. Moisture bursts under high temperature
If the LED package is exposed to the air for a long time, it will absorb moisture. If it is not dehumidified before use, it will cause the moisture in the LED package to expand due to the high temperature and long time period during the reflow soldering process. The LED package bursts, which indirectly causes the LED chip to overheat and damage it.
Solution: The storage environment of the LED should be constant temperature and humidity. The unused LED must be baked in an oven at about 80° for 6~8 hours for dehumidification before the next use, to ensure that the used LED will not have any Moisture absorption phenomenon.