New Year is coming - and now from the boxes to the lightChristmas-tree decorations and garlands. And if the toy just hangs on the place chosen for it, then with garlands there are different accidents. This is especially true of cheap options. Anyone who has ever repaired this miracle of technology, knows that the Chinese garland, whose scheme is simple, has some peculiarities.
Most often Chinese Christmas decorationthe craftsmen are attracted by the pleasant price (from 150 rubles per piece) and bright lights that flash in several modes. Four types of light bulbs, and sometimes LEDs, delight the eye and wallet. However, after a while one or several flowers stop burning. There may be several reasons, but the fact remains that the garland no longer works at 100%.
If the product has deteriorated, its optionalchange to new Although it is customary to enter the New Year in everything new, but our hands are not created for boredom. Is it difficult to change a light bulb? The point here is not the price and not the time spent on repairs. The matter is in principle. And every person who first decided to repair the Chinese garland, begins to wonder.
The most unpleasant surprise when repairing - thinwire conductors. You start to wonder how it all works and has not yet crumbled. It becomes clear and the price of the product, and reliability of operation. This is the Chinese garland. Scheme, repair and search for gaps - this is your further fate. Connection wiring, of course, is the weakest point. Therefore, the search for a gap should begin with the switching box.
In addition to the surprisingly thin wiring, the Chinesethe product can please with fast failure of the thyristor color lines control, as well as the main controller. To replace faulty elements, it is often necessary to search for domestic analogues or redo the whole scheme.
Consider some of the possible cases whereThe scheme of the Chinese garland is not needed. From the course of electrical engineering, only 2 problems are known related to the malfunction of electricity: a short circuit and an open circuit. In the case of a broken garland you need to look for a break. Suppose the blue color is off. Perhaps 2 options:
Now you should find a gap or burntlight bulb. As a rule, this will help us visual inspection. Most often, the gap can be seen with the naked eye, and the repair quickly ends there. To connect the two ends of the wire, you do not even need to have a soldering iron on hand - a simple twist helps. The bare wire must necessarily be wrapped with tape.
Attention! Any repair of electrical products is performed without connection to the network.
If the gap is not visible, you should pay attentionon the box with a button. The Chinese garland, the scheme of which does not differ from the standard one, has a control unit in a flat box. After unscrewing 2 or more screws, you can see a small PCB with several elements. To it fits 2 wires from the plug: phase and zero, as well as 4 wires with light bulbs of four different colors. Breaks most often occur at the junction of the wires.
A number of faults associated with violationwork control unit. Here the button for switching modes may fail. This problem is “treated” by cleaning the contacts or replacing them completely. The Chinese garland, whose scheme is standard, necessarily incorporates a controller. It can also deteriorate and can also be replaced. Any of 4 thyristors can become a weak link - one for each color.
To replace defective items Chinesecolleagues offer their element base. The problem is that the lamps quickly become obsolete, and finding the right version of Chinese production is problematic. In this case, the domestic element base comes to the rescue. The most important thing is to choose the right analogue.
To select an analogue of the desired element, it is important to knowparameters of the Chinese product. Often the forums are looking for a transistor PCR406J. Chinese garland, the scheme of which is made on such elements, is familiar. Only the sought-for element actually turns out to be a thyristor, and its Russian analog MCR100 is almost identical in terms of parameters.
What to do if no gaps were found?The scheme of the Chinese garland is simple. All bulbs are interconnected in series. So, if the blue line is not lit, it is necessary to find at least one burnt blue lamp. There are two options.
The second method can not be used ifApply a multimeter with thin needles attached to the ends of the probes. However, the veins of conductors used in Chinese products are so thin that they can even be torn by a needle.
It happens that at hand there is no second spoiledgarland and new bulb. In this case, you can simply connect the two ends together. This is fraught with an increase in voltage on the remaining light bulbs, since according to the laws of electrical engineering in a series circuit, the voltage is divided equally. But if you remove one or two elements, it does not greatly affect the service life. Despite the fact that the schemes of Christmas tree garlands are Chinese, everything works on general principles.
Такие изделия в последнее время получили большое Spread. In this regard, low-power elements appeared on the garlands instead of light bulbs. The scheme of the Chinese LED garland differs little from the standard. But, given the fact that the LED is designed for much lower voltage, each of them will have a resistor in the circuit for a 220 V network. In another embodiment, a step-down transformer will be implemented at the system input.
In addition to the usual scheme where the elements are locatedin series, there is a scheme of Chinese LED garlands arranged in parallel. With this option, even burnout of several light elements at once will not bring dissonance into the overall picture.
Chinese garland, whose scheme is built on LEDs, has a number of advantages.
LED Chinese garland is very convenientuse to decorate the street side of the house. Due to the high moisture and frost resistance such products will be pleasing to the eye for a long time without repair.
Buying such a product does not always workplease yourself and loved ones with high-quality decoration. Sometimes behind bright lights and an attractive cost, a fairly simple and cheap Chinese garland is hidden. Its scheme will be easy for studying and convenient for application of electrotechnical skills. Repairing a product can also bring moral satisfaction. Everyone decides for himself whether it is worth the time and effort. Or maybe it is better to take the option more expensive? After all, even Chinese garlands for a high price are much better than their cheap "compatriots". The choice is yours!
