DRUM UNIT hp Color 9850mfp II UNIT EXPLANATION 2-22 Symbol Name Function or method [10] Charging M Forms a charging potential on the surface of the drum M DC corona discharge (Scotron) Wire discharge: gold-plated tungsten wire (φ 30µm) Constant-current method DC output range: -450 to -1100µA Grid bias: charging grid plate Constant voltage method DC output range: -200 to -950V [11] Charging C Forms a charging potential on the surface of the drum C DC corona discharge (Scotron) Wire discharge: gold-plated tungsten wire (φ 30µm) Constant-current method DC output range: -450 to -1100µA Grid bias: charging grid plate Constant voltage method DC output range:
-200 to -950V [12] Charging K Forms a charging potential on the surface of the drum K DC corona discharge (Scotron) Wire discharge: gold-plated tungsten wire (φ 30µm) Constant-current method DC output range: -450 to -1100µA Grid bias: charging grid plate Constant voltage method DC output range:
-200 to -950V [13] Pre-charging exposure lamp Y (PCL Y) Lowers and uniforms the drum Y surface potential LED [14] Pre-charging exposure lamp M (PCL M) Lowers and uniforms the drum M surface potential LED [15] Pre-charging exposure lamp C (PCL C) Lowers and uniforms the drum C surface potential LED [16] Pre-charging exposure lamp K (PCL K) Lowers and uniforms the drum K surface potential LED [17] Cleaning blade Cleans the drum Drum contacting separation method [18] Toner collection screw Conveys toner from the cleaning section to the toner collection section Screw method [19] Lubrication Assists the drum cleaning ability Zinc stearate rod [20] Lube applying brush roller Applies lubrication to the drum surface Drum contacting application method by brush [21] Transfer belt unit YMCK synthetic transfer image formation base See "5.
Transfer belt unit." [22] Drum K Transfer image formation base for black OPC drum (φ 60mm) [23] Drum C Transfer image formation base for cyan OPC drum (φ 60mm) [24] Drum M Transfer image formation base for magenta OPC drum (φ 60mm) [25] Drum Y Transfer image formation base for yellow OPC drum (φ 60mm) [26] Process unit Color image formation section Consists of the developing unit, drum cartridge, and transfer belt unit