Common faults and solutions of household LED lights
LED lights are gradually occupying the current electric light market due to their high brightness, low energy consumption and long life. Generally speaking, it is difficult for LED lights to have problems. Among the problems of LED lights, there are nothing more than three faults: the lights do not turn on, the lights become dim, and the lights flicker after turning off the lights. Today, LED panel light manufacturers come to analyze and solve various problems one by one.
The structure of LED lights
There are two types of LED lights, one is a ceiling light and the other is a light bulb. No matter what form of lamp, the internal structure is the same, divided into lamp beads and drivers.
Lamp beads
Open the shell of the ceiling light or the white plastic part of the bulb, and you can see a circuit board covered with yellow rectangles inside. The yellow on this circuit board is the lamp bead. The lamp bead is the illuminant of the LED lamp, and its number determines the brightness of the LED lamp.
Lamp beads, commonly known as "light emitting diodes", are the most commonly used electrical components in electricity.
driver
The driver of the LED light bulb is installed at the bottom and cannot be seen from the outside. The driver of the ceiling light is a black box, and the driver needs to be installed first when installing the light.
The driver has functions such as constant current, step-down, rectification and filtering.
The solution to the LED light not on
When the light does not turn on, you should first make sure that the circuit is ok. If it's a new light bulb, you should use a pen to measure, or install an incandescent light bulb to see if there's voltage in the circuit. After confirming that there is no problem with the circuit, you can start the following maintenance.
drive problem
The light doesn't come on. Nine times out of ten, it's a problem with the driver. Light-emitting diodes have high requirements on current and voltage. If the current and voltage are too large or too small, they cannot be lit normally. Therefore, constant current drivers, rectifiers, step-down devices and other devices in the driver are required to be maintained.
If the lamp bead does not light up after turning on the light, the first thing to consider is the driver. At this point a new drive can be purchased for replacement.
The solution to the dim LED light brightness
This problem needs to be solved together with the previous one. This may be the case if the lights are dimmed or not.
lamp bead problem
The lamp beads of LED lights are divided into strings, and the lamp beads on each string are connected in series, and the strings are connected in parallel.
Therefore, if a lamp bead on this string is burned, it will cause this string of lamp beads not to light up. If each string has a lamp bead burnt, it will cause the entire lamp to be off. If each string has one lamp bead burnt, it is necessary to consider that there is a problem with the capacitor or resistance on the driver.
The burnt lamp bead and the normal lamp bead can be seen from the appearance. The burnt lamp bead has a black dot in the middle, and this dot cannot be wiped off.
If the number of burnt lamp beads is not many, you can solder the two soldering feet behind the burnt lamp beads together with an electric soldering iron. If there are too many burned lamp beads, it is recommended to buy a lamp bead board to replace it, so as not to affect the lighting brightness.
The solution to the flickering after the LED light is turned off
If the light flashes after turning off the light, first confirm the wiring problem. The most likely problem is the switch-controlled neutral. At this time, it should be corrected in time to avoid danger. The correct way is to switch the live wire and connect the neutral wire to the light.
If there is no problem with the circuit, it may be that the LED lamp generates a self-inductive current. The easiest way is to buy a 220V relay and connect the coil in series with the light to solve the problem.
