1. The problem is caused by abnormal power supply:

01. Check whether the power supply works normally and whether the indicator light is on. If not, check whether the power supply is connected properly;

02. Check whether the power cord of the lamp bead is well connected with the positive and negative poles of the power supply, and whether there is phase reversal. If the above problems exist, please connect them correctly.

2. Requirements for voltage of LED lamp beads:

The nominal 3V LED lamp beads, in fact, have different requirements on current for different colors. Yellow requires the minimum current, which is red, green, white, and blue in turn. Excessive current will scorch the wick. When using a 2.4V rechargeable battery, * * it is easy to scorch, because even if the voltage is small, but the current is too large, it will still scorch at will.

3. Power failure detection LED:

In case of power failure, it is recommended to prepare a 3V button battery for the convenience of selection when purchasing, which can be used to conveniently check what light the LED emits.

4. Reasons for burning of high-power led lamp beads:

01. The upper and lower two filaments are called gold wires in our industry. Pure gold wires are used for conducting electricity. Two positive electrodes and two negative electrodes. A really good product will have a fifth wire, which is welded to the zener tube for protection.

02. When the filament is short, it has clearly told you that the lamp has been burned by high current, which is equivalent to an open circuit.

03. The driving current of high-power 1W is about 350ma, and the working voltage is between 3.2-3.6V. Please pay attention when using. Excessive current will burn the lamp.

04. Generally, the aluminum substrates of three 1W lamps are driven by 12V or so, and few of them are directly used by 220V. Would you like to see if a constant current source or 12V drive power supply is missing?

5. Reasons for the yellow LED lamp beads:

The yellowing of LED outer sealing adhesive is mostly caused by the mismatch between epoxy resin and curing agent, but it cannot be ruled out that the outer sealing adhesive is baked for too long. Solution: Purchase a complete set of external sealing glue and curing agent. For example, the 800 or 2339 glue of Shanghai Fine Chemical will not have the following situations. In addition, pay attention to production control, strictly follow the operation instructions, and avoid the reasons such as too long or insufficient baking time. This situation is well controlled.

6. Reasons for electric leakage of LED lamp beads:

The machine equipment is not grounded, and the personnel do not wear an electrostatic bracelet (must have a rope). The resulting electrostatic protection is improper. Then, during the packaging process, the wire PAD is biased, and finally, there is a hidden quality problem of the chip itself.

7. LED lamp beads shall be the problem of capacitive and inductive load:

In fact, neither of them is true. The LED lamp bead is a diode, which requires a positive conduction voltage, generally 2-3.5V. In addition, the current can control the brightness of the LED lamp bead. That is to say, LED lamp beads only convert electric energy into light energy.

8. The reason of LED lamp pearl fading:

There are four reasons for the attenuation of low-power LED: First, poor heat conduction of the iron bracket. 2： The epoxy resin is yellowed. 3： The contact between chip and bracket is not close enough. 4： Large chip attenuation. If it is white light, there is also the problem of phosphor attenuation.