1, the toner cartridge leaks powder, just empty the waste powder, and the toner cartridge that is easy to add powder can be dumped by itself. It is impossible to find a professional to repair it.
2. The drum core is damaged by aging. If it is found that one side of the drum core of the selenium drum falls off obviously, it means that the drum core is aging and needs to be replaced with a new drum core.
3. The fixing film or fixing roller is damaged. If there is obvious rubbing sound when printing, there are gray fragments in the machine after the toner cartridge is taken out, which need to be replaced by professionals.
Laser printer is a printing output device which combines laser scanning technology and electrophotography technology. Its basic working principle is that the binary data information transmitted by the computer is converted into a video signal through a video controller, and then the video signal is converted into a laser driving signal through a video interface/control system, and then a laser scanning system generates a laser beam carrying character information, and finally the laser beam is imaged and transferred to paper by an electrophotographic system.