How to fix LED spotlight
Finally, LED spotlights have gained considerable popularity and are gradually replacing other types of spotlights from the market due to their technical qualities: cost-effectiveness and durability. But dory LED spotlights can fail.
In the event that you work with a specialized electrical repair worker, you can save a lot of time and bet for repairs. In any case, repairs on LED floodlights can be perverted on the surface, just try carefully and learn the principle of work and design.
Containment: 1. Typical malfunctions 2. LED spotlight device 3. Drivers chains 4. Stepka instructions for stupka for diagnostics and repair 5. Conclusion
Typical malfunctions
In any case, when there is a malfunction in the spotlight, work more and more, and follow the problems:
- When applying for voltage, the searchlight does not work in vain - no light.
- Whenever the spotlight works, it’s white, like the LED flashes periodically or constantly.
- When applying voltage, the searchlight does not work with a full power or it is white, it has changed a lot for a bright light.
Is it possible to fix your LED spotlight? I understand it, but from the knowledge of knowledge.
LED spotlight device
Tryabva yes, you know what design for all LED floodlights consists of two main parts: LED matrix and driver. Matrix e source on Svetlina. Spotlights can and can be installed with one or more matrices, which can and all consist of a few LEDs. Another important detail on the spotlight is not driver or stored.
LED spotlight device 
Driver for LED spotlight 
LED matrix
Accordingly, repairing a defective LED floodlight is still identified as a defective part and is confused with another, which is a suitable ratio on the parameter.
From the source to the current, it is stored by supplying an electronic handkerchief to the water supply, it is converting the electric current and then transferring it to the matrix, which is a light source.
In addition to the matrix and driver, the LED projector can include:
- Radiator, someone serve for razseyvane on toplinat.
- Reflector, bream or looked around, which focuses the light beam.
- Fixtures behind a fixed spotlight.
Drivers chains
Once again, repair the drivers for the LED spotlights, and you know, the structure is rather rough. Driver design including diode bridge, resistors and capacitors. Diodniyat bridge serve for the korigirane for electric current, which is a trace of the stabilizer with the help of resistors and capacitors.
This is a little bit sorry for the schemes for svarzvane on the driver. Diagram of the garden for a clear description of the principle of operation and may be different from those, installed in other devices.
Protecting the string on the LED lamp MR-16.
Šofjorska chain for LED lamp MR-16 with protection.
SMD-5050 LED Veriga Driver Veriga.
But LED floodlights are used by complex drivers, which will achieve good performance.
Approximate scheme impulsesen driver
Veriga on impulsesen driver back kjm sdzharzhanieto ↑
Stepka instructions for stupka for diagnostics and repair
If you repair the LED spotlight, please own it, do it all, and follow the following sequence of actions:
- Vsion pregled on the device.
- Water check.
- Check for LED matrix.
Vsion Pregled
Somehow it’s good electrical engineering, any malfunction on the electrical equipment has two reasons: sometimes there’s no contact, sometimes it’s a ripple, yes, or sometimes it’s a contact, sometimes it’s not a ripple, yes there!
A careful look at the spotlights can significantly and save the task of suspending for malfunctions. First try and check the protection of the conductor. You don't have to try and feel, different mechanical damage to the insulation and, when disassembled, watch out for damage to the insulation from the connection or watch out for the fire as a result of the fuel effect on the electric current.
Secondly, tryabva and check the housings for the device and the LED matrix for various mechanical damage. When examining the matrix, you can visually and determine the fault on the LED / matrix (such as COB) by the presence of a dot on the black.
In the production of LEDs, using COB (Chip On Board) technology, a few LEDs are located on a single scarf and coated with phosphor. If only one or a little bit of the LED will damage it, the handkerchief will be washed out from work, then the LEDs will be connected in series. The LED will burn out more distinguishable from others in darkness. From the design to the matrix, which is from the separate arrangement of the LED, the defective one can be different in color from the next.
Thirdly, tyaloto on the spotlight, decoction it and check the situation on the prepaid. In this case, tryabva and pay attention to the condition of the skat, to the lipsat, to mechanical damage or burnt out elements. Contact us to check for signs of oxidization or corrosion.
At the time of the check, it is even more important to call the conductor and check the electrical contact of the chain wire.
Driver functionality check
For yes, check the operability of the driver, and it is necessary to save the driver with a shifting voltage of 220 V. The voltage is constantly running out, and the voltage is always higher, if it is a little higher than the stoynost, it is put on a kutiyata.
For example, if 28-38 V is connected to the case, when the driver is wired without a product, the original voltage is still 40 V.
But with the tosi method for checking, you can send a sin, for some reason the drivers, which may or may not turn on without a product. For yes, get the correct results from the test, cut the output resistor to the driver.
Election for the cost of the resistor trebva and all the perverts according to the law on Ohm. For yes, send Comrade, tryabva and figure out how to get the parameters for recording in the corps. For example, as the case is: "OUTPUT 23-35 VDC 600 mA ± 5%", ni-malkata resistance to resistance is calculated as: 23 / 0.6 = 38 Ohm. In response, nai-visokata cost of se calculus kato: 35 / 0.6 \u003d 58 ohms. The next step is to choose a suitable resistor for a negligible value, for which we foresee the power. If you choose a resistor with insufficient power, it will heat up significantly in time for work and burn out. Standard range from capacitance including value: 0.125; 0.25; 0.5; 1; 2 or more wool.
The power to the resistor ce is determined by the product of voltage (U) and current (I) according to the formula:
P=U*I
The next calculation is to choose nai - suitable from the standard value.
The next step is to check for voltage at the output to the device. If there is a warning in the border, citing a report card for water, we conclude that the device is working and continues to be suspended due to a malfunction.
Matrix check
For yes, check the LED matrix, try again and apply a voltage, some of it a little from the nominal value. Kogato svyarzvame matricata, nie kontrolirame silat on the current. The working matrix still shines.
The next step is to increase the voltage until the rated current is reached. The work matrix is shaking and shining, and the flow of shaking is shining and responding to the nominal.
For protection against voltage, this and control of the parameters must be specially stored in a laboratory. So in the block you allow smoothly and apply voltage to the matrix and yes control the current and voltage.
When lips on such a device, you can use the working driver, removed from each spotlight.
In the production of LEDs using COB (Chip On Board) technology, some LEDs with an open frame are located on a single scarf and covered with phosphor. If only one or a little bit of the LED will damage it, the handkerchief will be washed out from work, then the LEDs will be connected in series. The LED will burn out more distinguishable from others in darkness.
LED matrix, directed by COB technology
Defective LED matrix COB
LEDs are connected in series, which is the position at the top of the matrix from the open type. Possibly connected in cascades, that is, groups from a few LEDs can be connected in series. In case of damage, the LED will be separated further away from the stop.
Faulty LED
For accurately determining if the LED is defective, use the tester in the diode test mode.
Conclusion
A trace is identified for a defective element, which may be replaced with a defective one with similar characteristics.If you direct the error in the selection to the element, damage to the correct one or replacement is often possible at no cost. Therefore, element, which should be replaced, tryabva and dissuade the characteristics of the current voltage on the technical side.
When crushed on a matrix, tryabva yes, change and termichnata gres. Installed without thermal paste, it will inevitably lead to overheating and failure on the matrix.
An important condition is for sglobyavaneto on the spotlights and all oshiguri hermeticity on the construction. This condition is not to be neglected, it is also possible that a failure to target the target spotlight and the probability of shock from currents is significantly increased.
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