How to do if the led light is not lit _ how to replace the led light

LED (Light Emitting Diode) is a solid-state semiconductor device capable of converting electrical energy into visible light. It is called the fourth-generation illumination source or green light source, and has the characteristics of energy saving, environmental protection, long life and small size.

LED lights are available in both ceiling and light bulbs, but the internal structure is the same regardless of the form.

1, lamp beads: the illuminant of LED lights, the most commonly used electrical components in electricity

Open the outer lamp / bulb white plastic part of the ceiling lamp, we can see a circuit board covered with yellow rectangle, the yellow part is the lamp bead, the number determines the brightness of the LED lamp.

2, the driver: constant current, buck, rectification, filtering function

The drive for the ceiling light is a black box, and the drive for the light bulb is mounted on the bottom and is not visible on the outside.

In general, the life of a led tube is more than 50,000 hours, about 10 hours per day, which can be used for about 13 years. But this is only a theoretical estimate. In fact, when using a led ceiling lamp, it is also necessary to consider the heat generated by the LED chip and the impact of the inrush current on the LED diode. Excessive current is still very easy to break down the diode characteristics of the LED. Then these factors will cause the led light to be damaged. When considering these principles, we should learn to avoid the factors that cause the damage of the LED ceiling lamp when using the led ceiling lamp.

the reason:

1. The packaging protection of the LED light bar is not perfect, resulting in damage to the lamp bead during transportation.

2. The soldering point of the LED light bar has a phenomenon of virtual soldering, and the vibration during the transportation causes the solder joint to fall off and the light strip is not bright.

3. The amount of soldering of the LED strip is small, and the solder joint is easy to fall off.

4, LED light bar solder quality is not good, LED flexible lamp strip during the bending process is prone to brittle fracture, shedding phenomenon.

5. When the LED light bar is installed, the bending angle is too large, causing the LED flexible lamp to be separated from the copper foil and causing no light.

6. When the LED light bar is installed, the product is over-extruded, resulting in the LED flexible lamp with the chip being damaged or the solder joint deformed off and not bright.

7. The solder mask of the LED strip circuit board is too thick. The solder and the circuit board cannot be completely fused together during soldering, which is also a phenomenon of solder joint.

8. The LED light bar can not be twisted during installation. If it is twisted, the solder joint of the LED flexible light strip will fall off and cause no light.

1. Confirm the circuit: The newly installed lamp should be measured with an electric pen to check whether there is voltage in the circuit.

2, the drive problem: the light is not bright, in all likelihood is the drive problem. If the lamp is not lit after turning on the light, you should purchase a new drive to replace it.

PS: Light-emitting diodes have high requirements on current and voltage. Therefore, constant current drivers and rectifiers and bucks in the driver are required to maintain their use.

1. Turn off the switch. With the help of the folding ladder, remove the outer casing of the led ceiling light and check if the light tube is dark and dark. If so, it is very likely that the lamp has been damaged. Must be replaced, this LED tube can be bought in the hardware store, it is recommended to choose a well-known brand.

2, if the lamp is still intact, then you should try to tighten the lamp joint to see if there is a bad contact, this situation is also relatively simple operation, it is easy to happen.

3. If none of the above problems occur, check whether the ballast is intact, whether it has a burning smell, whether the ballast has a black burnt appearance, and if so, the possibility It is the problem of the ballast. It is better to replace one, the price of the ballast is more expensive than the lamp.

4, is to check whether the contact head of the led light has electricity, if not, then it should be a switch or line problem.

According to the above operation, basically, the line is checked from the lamp head to basically find the cause of the defect. At the same time, we should also pay attention not to rush to open the LED ceiling lamp, which will generate impact current, affect the service life, but also keep the air circulation of the room, to avoid the humidity of the room is too heavy.

WOSEN is a professional manufacturer and supplier of Led Flood Light, Led Street Light, Led Solar Light, etc. For more information, please visit https://www.wosenled.com/ or contact admin@wosenled.com or WhatsApp +86-13425434349