LED full color perforated lights do not change color solution
                                LED full color perforated lights do not change color solution 

After the full-color LED exposure lamp is powered on, there is effect change, but the LED effect is disorderly string and flicker, and the indicator light of the controller is normal.
This fault in the actual outdoor luminous advertising words also often appear. There are three main reasons for this failure.
1. The ground wire between the manufacture and the lamp is not connected. This happens all the time. Many people tend to pull only one signal line from the lamp string into the controller, while the negative terminal is connected to the transformer.
This practice is not standard, because sometimes there are multiple transformer output, their negative pole is not necessarily connected together, so that there is no common ground between the controller and the lamp string and quickly on the power, the lamp flash. Therefore, when wiring, must be in accordance with the requirements of wiring, to avoid this kind of error.
2. The effect of SD card surface is wrong, and the lamp chip selected for the effect is inconsistent with the chip of the actual lamp. This situation is the programmer, in the program when the selection of the wrong IC model. The way out is to redesign the program.
3. The power supply voltage of the lamp is insufficient. This also leads to a lot of flashover. We calculate the number of transformers when a certain transformer nominal power 80 percent to use. Some transformer power virtual standard, even according to 6. So try not to choose a bad transformer. As soon as possible to choose the exposure lamp manufacturers own configuration of the power supply to ensure quality and effect.