Introduction to Electronic Ballast: An electronic control device that uses semiconductor electronic components to convert DC or low-frequency AC voltage into high-frequency AC voltage, driving the operation of low voltage gas discharge lamps (sterilization lamps), halogen tungsten lamps, and other light sources. The most widely used is electronic ballasts for fluorescent lamps. Electronic ballasts include fluorescent lamp electronic ballasts, high-pressure sodium lamp electronic ballasts, and metal halide lamp electronic ballasts. Due to the use of modern soft switching inverter technology, advanced active power factor correction technology, and electronic filtering measures, it has good electromagnetic compatibility and reduces the self loss of the ballast. Distinguish the quality of the electronic ballast by removing the starter, disconnecting the power supply, and testing both ends of the ballast. If the ballast is an old inductive type, the inductive type can only be used to test whether the coil is burnt out using this method. This old-fashioned ballast is broken, usually due to the coil burning out, resulting in a lack of voltage at both ends of the lamp tube, which will not cause the lamp tube to burn out. There are many situations with electronic ballasts. You can measure the resistance values of the three ballasts separately using the method mentioned above to see if there are significant differences, in order to determine whether the ballast is damaged. You can also replace the starter to see if the one that will burn cannot be disconnected and remains in the path state. Anyway, use the substitution method