At present, the most common building lighting products are mainly digital tubes, because they are cheap and effective. This is the main reason why they are widely used. However, due to the mixed quality of digital tubes, plus some lighting companies The construction level is too low, which leads to the unsatisfactory effect after installation, and there will often be some small problems, such as the non-synchronized scrolling of the light bar of the digital tube, often flickering or not bright, which is very annoying to customers, but The solution to these problems is simple. The non-synchronization of the light bar of the digital tube when rolling is mainly caused by the signal controller. The digital tube has three wires, namely positive, negative, and signal wires. If the signal wire is not pressed to the correct position of the controller, then The scrolling on both sides will be out of sync after power up. If the lights of some of the digital tubes in the entire row are dimmed after the power is turned on, it can be concluded that there is a problem with the power supply, indicating that the output current or voltage is insufficient, resulting in dim brightness. Just replace the power supply with a good one.