Laser beam printer

Let's take a look how a color laser beam printer works First, a negative electric charge is applied uniformly across the surface of the photo sensitive drum The photo sensitive drum is exposed to laser beams emitted from the laser transmitter unit which conveys image data sent from a PC The areas of the photo sensitive drum on which laser beams are emitted discharge negative electricity negatively charged toner fixes only to those areas of the photo sensitive drum that were exposed to the laser beams after a paper is fixed to the photo sensitive drum a positive charge is applied to attract toner this process is conducted 4 times with separate scanners and toner cartridges for each of the 4 colors creating the color image on the paper finally heat and pressure are applied to formally fix the toner image on the paper prior to the final output