The LED Strip Is Blinking: Why Is It Blinking In The On State And After It Is Turned Off? What Should I Do If It Blinks When Turned On? Main Reasons

2024 Author: Beatrice Philips | [email protected]. Last modified: 2024-01-18 12:09

LED strip, like any other device of this type, can suffer from certain malfunctions. It so happens that after a while of use, the ribbon starts blinking. In this article, we will learn more about this problem, and also figure out what you can do about it.

Power supply problems

The power supply is the most important part of the light emitted by the LED strip . Otherwise, this component is called "driver". It includes a capacitor, which is designed to accumulate the required voltage. As soon as the largest volume is reached, small diode bulbs are set to flicker both on and off.

The driver has another equally important component. This is a rectifier bridge. If this component is damaged due to some kind of breakdown, then an alternating current is sent to the lighting device, which provokes an unnecessarily high flicker. In a properly working and high-quality power supply, certain standard indicators of a voltage drop of over 20% are provided. If this value turns out to be more modest, then with a decrease in the current power in the network, the LED lamps begin to blink, but not when turned on, but only after all the elements in the microcircuit have completely heated up.

What other causes of blinking could be?

The troubles associated with the blinking of LED bulbs can arise for many other reasons. It is very important at the first stages to determine what exactly is the source of the problem. Only in this way will it be possible to successfully get rid of it.

Let's consider in detail what else can cause the LED strips to blink.

Contact oxidation on connectors

Oxidation of contact elements on connector components may also be the root cause .… If these components were used to connect the tape, then their contacts, as a rule, lend themselves to oxidation in spaces where excessively wet overlaps take place. Under the action of oxides, the connecting elements undergo oxidation, and then completely burn out.

As a rule, similar situations arise in new buildings, therefore, in a new apartment during the installation of the system, it is best to turn to high-quality soldering.

Poor soldering

If the reason is not oxidation, then the problem here may lie in other, equally important points. For example, poor quality soldering can be the culprit. This deficiency is revealed very often.

Chaotic flickering of LED bulbs in almost all cases indicates too weak contact on soldering or bolts … As a rule, this problem appears if an acid combined with a flux was involved during the soldering process. These components can remain on the contacts, and then completely "eat up" the copper, if they are not thoroughly washed off. After that, the device starts to flicker violently.

Faulty LED

Also, often the problem lies in a malfunctioning LED . The strips with the power supply are folded from special modules. Each of them has 3 diodes. As soon as one of them burns out, then all three are blinking. In the ribbons, which are powered from the mains, the diodes in the modular bases are connected in sequential order. Each of the modular components includes 60 lamps.

If one of them is damaged, then the full module starts blinking, the length of which reaches 1 m.

Problems with the controller and remote

The main purpose of the controller is to adjust the intensity of the glow of one specific color of the bulbs .… The controller consists of a main unit and a remote control. The unit is usually installed in the area between the power supply and the LED strip itself. If there is a large footage of the product, then auxiliary blocks are often exhibited in the zones between the belts.

Today you can find mini-models of mechanical modification. The control of these varieties is carried out by means of buttons located on the body base. The most common cause of controller breakdowns in this case is high humidity. In order not to face such troubles, it is recommended to purchase only models that are characterized by an increased level of protection against negative external factors.

If the LED strip suddenly began to flicker, then the first thing to do is to check that the control panel is working properly . The level of its functionality is noticeably reduced if the battery has run out. Another equally common reason is button sticking.

This very often provokes an ordinary contact closure.

Other

Of course, the LED strip after turning on or when connected can show annoying blinking not only due to the problems listed above. Other situations can lead to such consequences. Let's find out which ones.

• Often, the LED strip blinks constantly or from time to time, if its installation was initially carried out incorrectly . In most cases, the root cause lies in the installation without reliable protection or without the necessary removal of excess heat.
• If you break directly the connection diagram of the diode tape , then this also leads to her blinking.
• Often the tape starts to flicker periodically or constantly, if it has exhausted its resource .

If the LED strip is simply glued, then against the background of impressive length values, the power will also be correspondingly large. In the absence of the required metal mounting channel, contact damage may occur due to severe overheating.

After a certain period of time, the operation of the light bulbs in such conditions show a characteristic blinking.

The most common mistake that is made when installing yourself is in the confusion of phase and zero . The lack of markings on the switching element often leads to confusion. If zero is applied to it, then the strip blinks when it is both on and off.

Towards the end of its operational life, due to wear of the crystals, in addition to blinking, a certain change in light may also be observed .… The level of brightness of the glow often suffers, after turning off the light bulbs may start blinking.

If blinking occurs in the off state, it may be caused by a backlit switch.

Troubleshooting Tips

Breakdowns, which as a result led to the blinking of the diode tape, are quite possible to detect on their own. This is often what people do when they face similar problems. A diagnostic inspection of all the main elements of the lighting device is required to be carried out using a voltmeter.

• The input voltage indicator must be 220 V.
• As for the output voltage of the driver (power supply), then such an indicator should take place here - 12 (24) V. A deviation of only 2 V is permissible.
• A certain voltage must be on the controller and dimmer (12V).
• In the connecting places of isolated diodes, a voltage of 7 to 12 V must be observed.
• It is imperative to use the control panel.

If connector elements are used for the connections, then they will also need to be carefully checked.

Before diagnosing the power supply, it must be disconnected from the controller and directly from the diode strip … The characteristics of the driver specified in the manual do not correspond to reality in all cases, which is why the user receives a blinking lighting device. If the manufacturer of the products from the very beginning saved a lot on the use of high-quality parts, then it makes sense to purchase a device that meets absolutely all the needs of a particular system. If a dimmer or controller of the device has undergone a breakdown, then they will definitely need to be replaced in accordance with all the rules.

The switch illumination is represented by the same LED. After someone starts the lighting, he interacts with the diode strip.

In this case, the best solution would be to replace the switch itself.

A non-working LED in the tape can also be detected independently. Let's see how this is done.

• A thorough visual examination is required first .… A damaged diode will have a darkened housing. Often, dark blotches are visible on faulty elements. If the change of broken sections did not give the desired results, then it will be necessary to ring all the bulbs.
• Another way can be a normal short circuit . With it, exceptionally well-functioning light bulbs light up.
• Together with diodes, it is recommended to conduct a detailed inspection and check of current-carrying paths and resistors . If these components are burned out, then some areas will need to be replaced.

General recommendations

Consider a few useful recommendations regarding the repair of an LED strip when blinking

• You need to know that the replacement procedure for the power supply does not need to be performed every time . First, it is advisable to check if the specific place in which the lighting device was installed has led to flickering. Some models are characterized by a decrease in functional level when installed in confined spaces.
• When buying a cheap LED strip light, it is very important to consider the fact that the initially specified percentage of drawdown may well not coincide with the real indicators .
• It is highly recommended to purchase only branded and validated power supplies . You can give preference to Chinese copies, but only providing a double margin.
• When checking the operation of all the necessary parts, you can use not a voltmeter, but multimeter suitable for measuring voltage of 12V.
• It is strongly discouraged to glue LED strips onto substrates with wood or plastic surfaces .… This prohibition is justified by the fact that it can easily provoke serious overheating, even if the device is of the highest quality, reliable and serviceable.
• The tape is not allowed to be soldered with a soldering iron, the power of which exceeds 60 watts . Otherwise, severe overheating of the contact may occur. If peeling occurs from the track, the connection will be completely unstable. Checking can be very simple - just press the contact with your finger and make sure that the light has appeared, the board is functioning correctly and error-free. From the moment the finger is removed, you will notice that the light is off.