Common faults and repair techniques of LED switch power supply

One Fuse blown: Generally speaking, a blown fuse indicates a problem with the internal circuit of the power supply. Due to high voltage and high current during power operation, it can cause an instantaneous increase in current inside the power supply and cause the fuse to melt.

Repair technique: Check for breakdown, open circuit, and damage to components such as rectifier diodes, high-voltage filtering electrolytic capacitors, and inverter power switches at the power input end. Also, check the various components on the circuit board to see if there is any burning or electrolyte overflow on the surface of these components.

II No DC voltage output or unstable voltage output: If the power supply always shows short circuits or open circuits, the power load may be too heavy, the rectifier diode in the high-frequency rectification and filtering circuit may be broken down, and the filtering capacitor may leak.

Repair technique: First, use a multimeter to measure the secondary components and rule out the possibility of high-frequency rectifier diode breakdown or load short circuit. If the output is zero at this time, it can be confirmed that there is a problem with the power supply control circuit. So we can use universal static measurement to check the damaged components of the corresponding components.

In terms of energy conservation, LED lights are a prominent product among them. As the main component of it, the importance of switch mode power supply is naturally evident. Today, we will introduce the working principle and repair techniques of LED light switch power supply, hoping to answer your questions.

Article source: Jiangmen LED Switching Power Supply http://www.gddpdz.com/