Three common faults of LED lamp and their solutions
Date: 2017-10-14 19:33:44 Hits: 592

LED lamp with its high brightness, low energy consumption, long life and other characteristics, gradually seize the current light market. Generally speaking, the LED lamp is very difficult to occur, in the LED lamp problem, there are only three kinds of faults: the light is not bright, the lamp is dim, and the lights are flashing after the lights are turned off. Today, we'll analyze the problems one by one.

The structure of LED lamp

There are two forms of LED lights, one is the ceiling lamp, and the other is the bulb. No matter what kind of form of the lamp, the internal structure is the same, divided into beads and drive.

Lamp beads

Open the shell of the ceiling lamp or the white plastic part of the bulb. You can see there is a yellow rectangle inside the circuit board. The circuit board is light yellow. Lamp is luminous body LED lamp, which determines the number of LED lamp brightness.

Three common faults of LED lamp and their solutions


The driver of the LED bulb is installed at the bottom and can not be seen outside. The driver of the ceiling lamp is a black box, and the driver needs to be installed first when installing the lamp.

The driver has constant current, step-down, rectifier, filtering and other functions.

Three common faults of LED lamp and their solutions

The solution of LED light is not bright

When the lights don't work, you should first make sure the circuit is ok. If the new lamp, should use the pencil measurement, or the installation of an incandescent lamp, to see if there is a voltage circuit. After the circuit is determined, the following maintenance can be started.

Drive problem

The lights don't work. Nine out of ten are drivers. The light emitting diode has high current and voltage requirements, and the current and voltage are too large or too small to be normally lighted. Therefore, the constant current driver and rectifier, Buck device and other devices in the driver are required to maintain the use.

If the lights are not bright lights up, should first consider is the problem with the drive. You can buy a new drive to replace it.

Solution to dim brightness of LED lamp

This problem should be solved together with a problem. This may be the case when the light is dark or not bright.

Light problem

The LED lamp beads, is divided into a string of a string, each string beads, is a series, between the string and string, parallel.

Therefore, this string has a lamp burned, will lead to a string of beads which are not bright. If each string has a lamp burned, it will cause the whole lights are not bright. If every string has a lamp burned, to consider on the drive capacitance or resistance problem.

Burn the beads and normal beads from the appearance can be read out, burn the beads with a black dot in the middle position, and the dot is indelible.

Three common faults of LED lamp and their solutions

The red circle is burning lamp

If the number of beads burned is not much, can be burned two feet behind the bead welding electric soldering iron together. If the number of beads burned too much, it is recommended to buy a piece of board for beads, so as not to affect the lighting brightness.

Solution to flicker of LED light after turning off the light

When the light is switched off, the circuit must be confirmed first. The most likely problem is the zero line controlled by the switch. This time should be corrected in time, in order to avoid danger, the correct way is to switch the control line, zero line connection light.

If there is no problem with the circuit, it is possible that the LED lamp produces a self inductance current. The easiest way is to buy a 220V relay, the coil and the lamp in series, can be solved. The reason for this is our previous article: how to solve the flashing problem after the lights are switched off.



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