First: First, look at the appearance of the lamp bead. If you see the phenomenon of blackening in the middle of the lamp bead, you can consider whether the lamp bead is broken down by excessive current, and the chip is directly burned to black, causing the lamp bead to die.

Second: We need to control the temperature of the heating table when we are reflowing. While controlling the temperature of the heating table, we must know whether the solder paste used is high-temperature solder paste or low-temperature solder paste, so that it is convenient to better control the heating table. temperature. We should not take too long during reflow soldering, generally 3-5 seconds. If the temperature is too high for a long time, the lamp beads will burn out, resulting in the death of the lamp beads.

Third: the lamp bead is not bright or the lamp bead is slightly bright, we should pay attention to whether the lamp bead has the phenomenon of virtual soldering and de-soldering, and pay attention when attaching the aluminum substrate. When we test, this will also cause the lamp bead to be off or slightly bright. Bright, at the same time, pay attention to the positive and negative polarity of the lamp beads. Under normal circumstances, like 5730 lamp beads and 2835 lamp beads, the cutting edge is generally negative, so we should pay attention to the polarity of the lamp beads when attaching the aluminum substrate.

Fourth: In the process of using the lamp bead, we must first understand the power of the lamp bead, and then match the appropriate current and voltage and matching power supply to light it. As a result, the lamp bead is directly burned out, and the current and voltage cannot be lower than the lighting standard of the lamp bead, which will also cause the lamp bead to not light up.

Fifth: We should pay attention to anti-static when operating, just wear electrostatic clothing when operating, static electricity will also cause the lamp bead to not light or cause the lamp bead to leak.

Sixth: Under normal circumstances, we do not recommend using an electric soldering iron when soldering lamp beads. If a small batch of lamp beads is used for experiments, we should pay attention to controlling the temperature of the electric soldering iron to a suitable temperature, and the time should not be too long. At the same time, the electric soldering iron should be Connect the wires to prevent leakage of static electricity.