The LED light is broken, it s not that it s not bright, it s slightly bright, which part is the prob

There is a problem with the power supply, and the dimming is due to the decay of the LED light.

1. LED fluorescent lamp, commonly known as straight tube lamp, is a substitute for traditional fluorescent tubes, which is reflected in two aspects: energy saving and environmental protection. The size and installation method are the same as those of traditional fluorescent lamps, but the emitting principle is to use LED semiconductor chips to emit light. According to the material of the shell, it is divided into two categories, one is glass, and the other is aluminum and PC.

In luminous efficiency, 90 m w 200 lm w.

2. The service life is more than 50,000 hours, the power supply voltage is AC85V-265V AC, no need for brightener and ballast, fast start, small power, no flicker, not easy to see fatigue. It is not only super energy-saving, but also environmentally friendly. It is one of the key products developed by the national green energy-saving lighting market project.

3. The installation of LED fluorescent lamp is relatively simple, it is divided into two kinds of built-in and external power supply, when the LED fluorescent lamp built-in power supply is installed, the original fluorescent lamp is removed and replaced with LED fluorescent lamp, and the ballast and glitter are removed, so that the 220V AC mains can be directly added to both ends of the LED fluorescent lamp. The LED fluorescent lamp external to the power supply is generally equipped with a special light stand, and the original one can be used if the original one is replaced.

4. Compared with incandescent lamps, LED fluorescent lamps save more than 80% of electricity, and the life span is more than 10 times that of ordinary lamps, which is almost maintenance-free, and there is no problem of replacing lamps, ballasts and brighteners frequently. The green and environmentally friendly semiconductor light source, soft light, pure spectrum, is conducive to the protection of workers' eyesight and physical health, 6000K cold light source gives people a visual cool feeling, helps to concentrate, improve efficiency.

The LED light is not lit, it's a pity to throw it away, the old electrician teaches you easy maintenance, practical electrician technology!

What is the reason why the lights are not on?

The packaging protection of the light bar is not perfect, which causes the lamp beads to be damaged by impact during transportation.

There is a virtual welding phenomenon in the solder joints of the light strip, and the vibration during transportation causes the solder joints to fall off, and the light strip does not light up.

3.The quality of the solder is not good, and the solder joints of the LED strip are easy to brittle and fall off during the bending process.

4.The bending angle is too large during installation, which causes the solder joints of the LED strip to detach from the copper foil, resulting in no light.

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

Second, the LED light is not on, but there is a weak light. How to fix them?

1.Replace the strip with a new one.

If the strip inside the LED lamp is aged or damaged, you can only replace the strip inside the tube instead of replacing the lamp housing. You can buy a suitable model of light to bring back, cut off the power supply, remove the screws with a screwdriver, remove the broken light strip, and replace it with a new one.

2.Replace the power supply with a new one.

Sometimes it's not because the LED light is broken and doesn't light up, but because it doesn't light up because of a problem with the driving power. In this case, you can check whether the drive power supply is damaged. If it is broken, replacing the same type of drive power supply can solve this problem.

3.Replace the LED lights with new ones.

If you want to completely and quickly solve the problem of LED lights not lighting, the best way is to buy new LED lights directly and install them. Because the LED light does not work, if you want to repair it, you need to check the cause step by step, and then take relevant measures according to the reason, which is time-consuming and laborious, and may not be able to be repaired. It's better to just buy a new one.

In this way, we can better ensure that the LED lights that can emit light normally can be used quickly and will not affect our work and life.

You can see that the LED light is not on, but there is a faint light that needs to be checked. If the strip light in the LED light is aged or damaged, you can only replace the light strip in the lamp tube, not the lamp housing, and the replacement is relatively simple.

The LED light is slightly bright, not bright because 1, the welding point of the LED light strip has a virtual welding phenomenon, and the vibration during the transportation process causes the solder joint to fall off and the light strip is not bright.

2. The quality of the solder is not good, and the solder joints of the LED strip are easy to crack and fall off in the process of bending.

3. The bending angle is too large during installation, which causes the LED strip solder joint to be separated from the copper foil and causes it to not light up.

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

If the 220V voltage is normal, it is normal during the next interview, and it glows after installation, that is, in the LED light, most of the patches are broken, so this situation occurs.

If it is a new lamp, you can exchange it with a new one from the merchant. It's just that the inside of the lamp is broken.

One or two LED patches can't be repaired by themselves. The probability of the LED light driver power supply being bad is very small, and most of them are broken one or two patches.

Most of the reasons why the LED lights do not light up are because some of the LED lamps are damaged, and the chance of damage to the power supply circuit is very small.

Detection method of lamp beads: use a digital multimeter and switch to"led"file, use two watch pens to the two ends of the lamp beads, if the lamp beads are good, the lamp beads shine when the lamp beads are connected to the lamp beads in the positive direction, and the reverse does not shine. If a lamp bead and two watch pens do not light up at both ends, whether they are connected to the front or back, it must be damaged.

Repair of LED lamp: replace the damaged lamp beads: blow off the damaged lamp beads with a heat gun and solder the good ones with a soldering iron.

Precautions: a, the positive and negative directions of the lamp beads should be correct, b, the thermal conductive silicone should be coated under the lamp beads. C, usually the lamp is originally used patch lamp beads, so it is not easy to disassemble with a soldering iron when dismantling down, it is best to use a sharp, temperature-adjustable hot air gun blowing (adjusted to about 400 degrees), and you can use 1W LED lamp beads with lead when replacing.

D, white LED lamps usually use "positive white" LED lamp beads.

Some of the beads in the string are aged or burned out.

The LED light is not lit and the power is slightly bright, this phenomenon indicates that the LED constant current drive power supply has been damaged, only a weak induced current, and the main reason for the damage of the LED constant current drive power supply is that the electrolytic capacitor is dry and fails, or the built-in MOS tube of the built-in constant current driver chip is too small and overheated and damaged.

There is a built-in MOS tube inside the chip, the built-in MOS tube of the constant current drive power supply of the ordinary LED lamp on the market is usually about 12 ohms, when the current is large, the chip is seriously heated, if the ambient temperature is high, the 24-hour working system, the temperature accumulates to a certain degree of bending speed, which exceeds the thermal limit temperature of the chip silicon, causing avalanche breakdown, the loop is disconnected, and only a weak induced current flows through the lamp beads, at this time we can only see that the LED light is not lit and the power is slightly bright.

To buy high-quality LED lights, as long as the following requirements are put forward when buying, if the manufacturer or distributor can meet, the lamp you buy will not be too bad:

1. High-temperature resistant lamp beads;

2. an aluminum substrate;

3. Luminous efficiency above 140lm w;

4. The life of LED drive electrolytic capacitor is required to be 10,000 hours;

5. The whole lamp is required to be guaranteed for five years;

6. Don't use all-plastic lamps, and aluminum should dissipate heat dissipation.

First, it is a problem caused by abnormal power supply.

1. Check whether the power supply is working normally, whether the instruction light is lit up, if not, check whether the power supply is connected;

2. Check whether the power cord of the lamp bead is well connected with the positive and negative poles of the power supply, and whether there is inversion. Eggplant.

Second, it is a problem caused by abnormal signal transmission.

1. Check whether the power cord of the required power cord of the controller is connected to the power supply normally;

2. Whether the control card with the program is in good contact with the controller, and whether the signal line of the lamp bead is transmitted to the controller.

The voltage is unstable, the lamp beads are necrotic and the installation is reversed, and the motherboard and aluminum-based cable are broken.

The LED light does not light up but is slightly bright after being turned on, and the maintenance method is as follows:

1. After power-on, it is slightly bright or not bright, which is reflected in the LED open circuit (breakdown burns out, and the entire LED circuit becomes an open macro circuit state) or burned out (the LED internal resistance increases, and the power supply voltage cannot meet the power supply of the series LED circuit).

2. It is also possible that the switch controls the live wire, when the switch is turned off, the live wire disconnects and the light will not be on, so it will be slightly bright, and there may be other channels with a small current passing through the zero line after the zero wire is disconnected. If the live line and the neutral line are reversed, it will work.

3. The problem of the LED lamp itself, the consumption is the storage of the power supply capacitor, it is the problem of the lamp, usually the LED lamp is guaranteed for 3 years, and it can be repaired by calling the repairman, and the voltage of the lamp and the source of the bucket will be bright if it is greater than 3 milliampes.

Advantages of LED lights:

Save more than half of the electricity cost for the same brightness; Special power saving, saving 78 kWh of electricity per year, and 450 kWh of electricity over the whole life cycle; T8LED tube 9W can replace the 16 to 24WT8LED glass tube circulating in other first-line brand markets, saving more than half of the electricity cost, saving more than 78 kWh of electricity per year, 50,000 hours of life cycle can save more than 450 kWh, saving half of the power while increasing the brightness by about 15%.

Ultra-high brightness, the brightness of the same power is more than doubled, brighter than the main T8LED tubes in circulation on the market; The brightness of the lighting 18WT8LED tube is 3 times the brightness of other first-line brands; One lamp is equal to two lamps of other first-line brands; High reliability, ultra-long life, 3 to 5 years almost not bad one, 5 years no flash, five years warranty, one top three.

It may be that the LED lamp bead is damaged or the driver is broken, first remove the LED lamp disk, carefully check whether the lamp bead has a black back point, if there is, the lamp bead is broken, replace it with a new one! If the lamp beads are in good condition, it may be that the driver is broken, mainly because some electronic components are aging, under normal circumstances, the LED lamp driver is broken and there is not much maintenance value, or replace it with a new one!

In this case, the electronic transformer is generally good, but a certain lamp bead on the lamp board is broken.

There must be a few sets of lamp beads that are not lit, which can be measured with a multimeter. I can't fix it myself.

Check the broken lamp beads for a short circuit.

The LED light is not lit and the power is slightly bright, this phenomenon indicates that the LED constant current drive power supply has been damaged, only a weak induced current version, and the main reason for the loss of the LED constant current drive power supply is very likely to be the electrolytic capacitor drying failure, or the built-in MOS tube of the built-in constant current driver chip is too small and overheated and damaged.

There is a built-in MOS tube inside the chip, the built-in MOS tube of the constant current drive power supply of the ordinary LED lamp on the market is usually about 12 ohms, when the current is large, the chip is seriously heated, if the ambient temperature is high, the 24-hour working system, the temperature accumulates to a certain extent, exceeding the thermal limit temperature of the chip silicon, causing avalanche breakdown, the loop is disconnected, and only a weak induction current flows through the lamp beads, at this time we can only see that the LED light is not lit and the power is slightly bright.

To buy high-quality LED lights, as long as the following requirements are put forward when buying, if the manufacturer or distributor can meet, the lamp you buy will not be too bad:

1. High-temperature resistant lamp beads;

2. an aluminum substrate;

3. Luminous efficiency above 140lm w;

4. The life of LED drive electrolytic capacitor is required to be 10,000 hours;

5. The whole lamp is required to be guaranteed for five years;

6. Don't use all-plastic lamps, and aluminum should dissipate heat dissipation.