HP Color 9850mfp Service Manual - Page 96
hp Color 9850mfp
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II UNIT EXPLANATION DRUM UNIT hp Color 9850mfp Symbol Name [10] Charging M [11] Charging C [12] Charging K [13] Pre-charging exposure lamp Y (PCL Y) [14] Pre-charging exposure lamp M (PCL M) [15] Pre-charging exposure lamp C (PCL C) [16] Pre-charging exposure lamp K (PCL K) [17] Cleaning blade [18] Toner collection screw [19] Lubrication [20] Lube applying brush roller [21] Transfer belt unit [22] Drum K [23] Drum C [24] Drum M [25] Drum Y [26] Process unit Function or method 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 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 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 Lowers and uniforms the drum Y surface potential LED Lowers and uniforms the drum M surface potential LED Lowers and uniforms the drum C surface potential LED Lowers and uniforms the drum K surface potential LED Cleans the drum Drum contacting separation method Conveys toner from the cleaning section to the toner collection section Screw method Assists the drum cleaning ability Zinc stearate rod Applies lubrication to the drum surface Drum contacting application method by brush YMCK synthetic transfer image formation base See "5. Transfer belt unit." Transfer image formation base for black OPC drum (φ 60mm) Transfer image formation base for cyan OPC drum (φ 60mm) Transfer image formation base for magenta OPC drum (φ 60mm) Transfer image formation base for yellow OPC drum (φ 60mm) Color image formation section Consists of the developing unit, drum cartridge, and transfer belt unit 2-22