4-4 Samsung ElectronicsTheory of Operation4-2-3 DevelopmentSurface moves between the DEV Roller and the OPC Drum. Negatively charged Toner is attracted to the highvoltage(-50V) of the exposed portions of the OPC Drum and is exposed more easily than the more negative(-800V) surface voltage of unexposed areas of the OPC Drum, resulting in a latent image.4-2-4 TransferToner moves from the surface of the OPC Drum to the paper via the Transfer Roller.Toner on the surface of theOPC DRUM will be attracted by the Transfer Roller, which is charged to approximately + 1.5 kV (600 ~ 2800V),depending upon temperature, and humidity.Toner then moves from the OPC DRUM to the paper.1.4KVGNDT/ROPC