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The light bead's good or bad judgment
The LED light emitting body, is a small light-emitting diode, these diodes on the lamp has an exclusive name-light bead.
The lamp bead is damaged, there may be two kinds of phenomena--light dimming or light bulb is not bright.
Among them, the possibility of light is low, if this happens, consider replacing the light starter at the same time. In most cases, the lights darken. This is because the LED light beads are in parallel, or in a group of parallel.
If there is a short circuit of a light bead, it is possible to burn down the whole set of light beads under the circuit.
The quality of the lamp bead can be judged by the naked eye or the multimeter.
In the eyes of the naked eye, notice the color of each lamp bead, the burnt light bead, there will be a small black dot If the light size is too large, the person is dazzled.
You can use a multimeter to measure, measurement, the multimeter hit the "buzzer file", one by one contact each lamp bead on both sides of the metal, to find the multimeter can not make a beep of the lamp bead
Replacement of single lamp beads LED lamp bead is divided into SMD type and pin type, new type ceiling lamp or LED light bulb, use is SMD type.
If a single lamp, such as an electrical indicator, and an older ceiling lamp, use a PIN type Pin-type lamp beads are welded and installed. When installing, the old lamp bead is heated to remove with electric iron first.
Then insert the new lamp bead, use the tin Bar to weld. SMD-type lamp beads are stuck by special glue, the installation of the use of hot air machine, if not, the use of iron or hair dryer hottest file, the old lamp bead on the back of heating, you can easily remove.
Put the new lamp bead on and wait for cooling.
No matter which kind of lamp bead, must notice two points in the installment: Light beads need to distinguish between positive and negative poles, whether the pin type or patch type, with a small hole at one end is the negative.
The Lamp Bead board will have the positive and negative pole marking, installs must keep the lamp bead and the lamp bead plate polarity same.
The use of electric iron or hot air machine, will make the light bead plate becomes hot, so disassembly light bead make, must use tweezers.
Replacement of the whole row of light beads
The whole row of light beads, usually installed in the lamp-specific terminals.
Fluorescent lamp transformation of the LED lamp, lamp bead plate is through the magnet suction on the lamp base, directly suction on it.