What is the matter with the blue light not lighting up in the first two sections of the LED guardrai

Why is there less LED digital tube in the urban lighting project?

Now city lighting has become a city's business card, it not only adds color to the city's night scene, it plays an important role in tourism, investment and so on. The beautiful night scene makes people nostalgic for going back and forth, but the uncoordinated lighting also spoils the scenery, such as the common phenomenon of few sections, of course, there are other problems, here is the reason for the phenomenon of few sections.

The less segment is mainly manifested in a certain section of one less color such as red, that is, when the red light is on, the segment is not bright, and it is not affected when the other colors are bright, but it will be manifested as a synthetic color chaos, such as bright yellow when it is bright green, bright white when it is yellow, the main reason for this phenomenon is the quality of LED lamp beads. Some inferior LED lamp beads have a great light decay, when lit for a period of time it will die, due to its death caused by the series of lamp beads in the series is not lit, this is a situation; There is also a situation that although the lamp bead dies but does not go on, it is a short circuit, so that the remaining several lamp beads in series are divided into high voltage and high brightness, so that these lamp beads will also die quickly due to high voltage, resulting in a small number of segments. Of course, this phenomenon is also related to the production of LED digital tubes, such as the production of anti-static is not in place, resulting in LED lamp beads by static electricity breakdown and dead lamp, or component welding requirements are not strict caused by virtual welding, open welding caused by a small number of phenomena, of course, this can be detected and avoided during factory inspection.

It is pointed out that when buying LED digital tubes for urban lighting projects, do not be greedy for cheap, and buy products produced by regular manufacturers.

It is estimated that the transistor is soldered.

Is it like that without roots, or is there just one problem?

If it's this one, you need to take it apart and check whether the LED in the light of the light you said is damaged. Generally, the LED circuit of the guardrail lamp adopts several LED series connections, front cracks and parallel working circuits. If it is only a small segment that does not light up, it means that there are individual LEDs damaged or all of them in the LED circuit connected in series with the ruler.

In addition, damage to the current limiting resistor of virtual soldering or series connection will also cause the LED of this circuit to not light up.

If each base height is like that, maybe the two small pieces of red you said are underneath, and there are no LED LEDs in it.

Is it internal or external? It may be that the transistor is soldered or burned!

LED Guardrail Pipe:

There are two scenarios:

If there are two power drivers for an LED guardrail pipe, one of the power drivers is broken. The other half can still work normally under one power drive.

If there is only one power supply for an LED guardrail pipe, it means that the circuit in the aluminum substrate in the middle is broken. In this case, the power drive power remains the same, but this half of the LED lamp beads will have to withstand twice the current, and soon this half will not be lit.

If you don't know if there are two power supplies or one, you need to judge.