User Guide 2-3ComponentsGetting to Know Your PrinterInternal Components451 2 3No. Name Description1 Paper Stop Raise this when printing on paper larger than A4/Letter size.2 Toner Cartridge Contains the toner and the photosensitive drum.3 Top Cover Open this when replacing the Toner Cartridge and removing jammed paper.4 Fuser Unit Fixes the toner on the paper. Do not touch this when using the printer as it is hot.5 Transfer Roll Cartridge Transfers the toner image on the surface of the photosensitive drum to the paper.