[13][11][9][7][1] [5][2] [4] [6][3][10][12][8][14]No. Name Function[1] Toner cartridge Cartridge filled with the toner for supply[2] Drum unit Unit consisting of the photosensitive drum, primary charging roller, etc.[3] Brush roller Rotates in connection with the primary charging roller to clean its surface.[4] Primary charging roller Rotates in connection with the photosensitive drum to cause it negatively charged.[5] Cleaning blade Scrapes off the residual toner on the photosensitive drum.[6] Waste toner feed screw Feeds the toner scraped off by the cleaning blade to the waste toner box.[7] Photosensitive drum Forms images on the surface of the photosensitive drum.[8] Static eliminator Applies negative charge to the back of paper to cause it separated from the photo-sensitive drum.[9] Transfer roller Applies positive charge to the back of a paper to cause the toner to be transferred toit.[10] Developing cylinder Transfers the toner in the developing unit to the photosensitive drum.[11] Developing unit Unit consisting of the developing cylinder, developing blade, etc.[12] Toner feed screw (Inside developingunit)Feeds the toner supplied from the sub hopper into the developing unit.[13] Toner feed screw (Inside sub hopper) Feeds the toner supplied from the toner cartridge to the developing unit.[14] Sub hopper Stores the toner supplied from the toner cartridge.■ Image Formation ProcessThe image formation system of the machine mainly consists of the photosensitive drum, primary charging roller, developingcylinder, transfer charging roller, static eliminator, and cleaning blade. The image formation process around the drum unit containsthe six blocks.2. Technical Explanation54
