What is the reason why the LED is not lit up?
1. The reasons why the LED is not bright are as follows: the packaging protection of the LED lamp strip is not perfect, resulting in the lamp beads being damaged by impact in the process of transportation. The solder joint of the LED lamp strip has the phenomenon of virtual welding, and the vibration in the process of transportation will cause the solder joint to fall off and cause the lamp belt to be not bright. The solder content of LED lamp strip is small, and the solder joint is easy to fall off.
2. The possible reasons are as follows. The power supply system is unstable. A part in the power supply circuit for the LED lamp is damaged. The power switch that controls the LED lamp is not in contact with reality. Solution: restart the power supply system again to see if the LED light is normal. Send the lamp to the repair station to repair or replace the LED lamp.
3. The reason why the led is not bright is that the solder joint of the LED lamp strip has the phenomenon of virtual welding, and the vibration in the process of transportation causes the solder joint to fall off and the lamp belt is not bright. The quality of solder is not good, and the solder joint of LED lamp strip is easy to crack and fall off in the process of bending.
4. the phenomenon of virtual welding exists in the solder joint: this situation is generally caused by the excessive vibration of the lamp in the process of transportation, and the protective measures fail to do so, and its solder joint falls off with the vibration, resulting in no light.
5 、. It is better to mark the brightness of the same power, the power of this lamp is a virtual standard. . The brightness of this lamp has greatly decreased after using it for a short period of time, and the quality of this lamp bead is too poor. . Suddenly there is only a faint light, and it may be that a few lamp beads appear dead lights.
6. One of the reasons why LED lamps and lanterns are not bright is that the power supply is broken and the whole lamp does not work, and the other is the lamp bead dead light. But the general LED lamp beads are in series and parallel, so the general power supply under normal circumstances will not be the whole not bright, may be only part of the not bright.
What is the reason why the led light is not on? How to repair it? Let’s take a look.
The common faults and maintenance of the led lamp are as follows: the solder joint of the LED lamp strip has the phenomenon of virtual welding, and the vibration in the transportation process causes the solder joint to fall off and the lamp belt is not bright. The quality of solder is not good, and the solder joint of LED lamp strip is easy to crack and fall off in the process of bending.
The reasons why the LED is not bright are as follows: the packaging protection of the LED lamp strip is not perfect, which causes the lamp beads to be damaged by impact during transportation. The solder joint of the LED lamp strip has the phenomenon of virtual welding, and the vibration in the process of transportation will cause the solder joint to fall off and cause the lamp belt to be not bright. The solder content of LED lamp strip is small, and the solder joint is easy to fall off.
The possible reasons are as follows. The power supply system is unstable. A part in the power supply circuit for the LED lamp is damaged. The power switch that controls the LED lamp is not in contact with reality. Solution: restart the power supply system again to see if the LED light is normal. Send the lamp to the repair station to repair or replace the LED lamp.
The led flat panel lamp is out of order.
The main results are as follows: 1. The common faults and maintenance of the led lamp are as follows: the solder joint of the LED lamp strip has the phenomenon of virtual welding, and the vibration in the transportation process causes the solder joint to fall off and the lamp belt is not bright. The quality of solder is not good, and the solder joint of LED lamp strip is easy to crack and fall off in the process of bending.
2. When the led lamp is off, the revision is as follows: first, remove the lampshade and turn on the electricity to see which lights are not on. Mark it with a pen. After finding the unlit lamp beads, pull out the unlit lamp beads with pliers and be careful not to scratch the circuit board. Replace lamp beads with wires and prepare wire 4-5cm. Connect the soldering iron to the power and heat it.
3, the switch contact is bad: if the contact of the switch is not touched, it will cause the light to flicker. At this time, we can turn on the switch and touch it with our hands to see if there is any bad contact. If so, we can use fine needles or toothpicks to gently pick up some, then reinsert them, and we can solve the problem.
4, the reason why the LED light is not lit is no more than two cases: first, the excessive leakage current of the LED causes the failure of the PN junction and makes the LED light not bright, which generally does not affect the work of other LED lights; second, the internal connection lead of the LED lamp is disconnected, resulting in a dead lamp caused by no current passing through the LED.
The reason and maintenance of led Lamp not working
The main results are as follows: 1. The common faults and maintenance of the led lamp are as follows: the solder joint of the LED lamp strip has the phenomenon of virtual welding, and the vibration in the transportation process causes the solder joint to fall off and the lamp belt is not bright. The quality of solder is not good, and the solder joint of LED lamp strip is easy to crack and fall off in the process of bending.
2, the switch contact is bad: if the contact of the switch is not touched, it will cause the light to flicker. At this time, we can turn on the switch and touch it with our hands to see if there is any bad contact. If so, we can use fine needles or toothpicks to gently pick up some, then reinsert them, and then solve the problem.
3, the lamp is not bright this fault generally has two reasons, one is the lamp aluminum substrate LED lamp T beads damage (LED lamp beads are connected in series, according to the laws of physics, once a damage, the entire circuit will be interrupted), another reason is the lamp constant current drive power damage, resulting in lamp beads can not get the working voltage.
What is the reason why the led light is not on?
What is the reason why the led lamp is not bright? if some of the lamp beads are not bright, it may be that the lamp beads are damaged, and this situation requires the replacement of new lamp beads. You can carefully observe the surface of the lamp beads, if there are black spots, it means it is burnt out.
First, the excessive leakage current of the LED causes the failure of the PN junction and makes the LED lamp not lit, which generally does not affect the work of other LED lights; second, the internal connection lead of the LED lamp is disconnected, resulting in a dead lamp due to no current passing through the LED.
The phenomenon of virtual welding exists in the solder joint: this situation is generally caused by excessive vibration of the lamp in the process of transportation, and the protective measures are not achieved, and its solder joint falls off with the vibration, resulting in no light.
The reasons why the LED is not bright are as follows: the packaging protection of the LED lamp strip is not perfect, which causes the lamp beads to be damaged by impact during transportation. The solder joint of the LED lamp strip has the phenomenon of virtual welding, and the vibration in the process of transportation will cause the solder joint to fall off and cause the lamp belt to be not bright. The solder content of LED lamp strip is small, and the solder joint is easy to fall off.
What is the reason why the led light is not on?
1. The reasons why the LED is not bright are as follows: the packaging protection of the LED lamp strip is not perfect, resulting in the lamp beads being damaged by impact in the process of transportation. The solder joint of the LED lamp strip has the phenomenon of virtual welding, and the vibration in the process of transportation will cause the solder joint to fall off and cause the lamp belt to be not bright. The solder content of LED lamp strip is small, and the solder joint is easy to fall off.
2. The phenomenon of virtual welding exists in the solder joint: this situation is generally caused by the excessive vibration of the lamp in the process of transportation, and the protective measures fail to do so, and its solder joint falls off with the vibration, resulting in no light.
3. The possible reasons are as follows. The power supply system is unstable. A part in the power supply circuit for the LED lamp is damaged. The power switch that controls the LED lamp is not in contact with reality. Solution: restart the power supply system again to see if the LED light is normal. Send the lamp to the repair station to repair or replace the LED lamp.
