Optical fiber welding machine prompt abnormal light source?

Optical fiber welding machine prompt abnormal light source? Optical fiber welding machine can appear this situation, follow these steps one by one. 1, confirm whether the objective is too dirty, clean the lens, the light source correction. 2, the above steps can't solve, whether down cover red light is too dirty, cleaning, in confirm if not lit up. 3, when the red light is not bright, that is in the red light is loose, in return for.