Laser scanner system The DC controller controls the laser scanner system according to commands from the formatter. The DC controller controls the internal components in the laser scanner system to form latent electrostatic image on the photosensitive drum according to the VIDEO signals. The following are the main components of the laser scanner system: ● Laser assembly ● Scanner motor assembly ● BD (beam detect) sensor ● Scanner mirror Figure 1-10 Laser scanner system DC controller Laser assembly Scanner mirror BD sensor Scanner motor assembly Photosensitive drum 20 Chapter 1 Theory of operation ENWW