How to repair fluorescent lamp with digital multimeter
1. Use a multimeter to measure the fluorescent tube, and measure the two feet of one end. If the circuit is open, the lamp will not be able to light up, and it must be useless. (The two feet on the same end are the same filament)
2. Adjust to the ohm gear, and use the 2 probes of the multimeter to test the terminals of the ballast. The meter shows that as long as it is not connected directly, there is a certain resistance value.
3. There is a neon bulb in the starter, and a bimetal sheet in the neon bulb is disconnected. After electrification, the neon gas glows and heats up, so that the bimetal sheet is heated and deformed to connect. Therefore, it is generally open circuit, if the channel is damaged.
Note: Even if it is measured with a multimeter that the starter is not short-circuited, it does not mean that the starter is good. Conversely, if the starter is on as measured by a multimeter, then the starter must be bad.
