HP Color 9850mfp Service Manual - Page 124
Aii Aunit Explanation
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II UNIT EXPLANATION REGISTRATION/ADU/REVERSE/PAPER EXIT hp Color 9850mfp Symbol Name [6] Decurler roller [7] Fixing section [8] ADU conveyance roller 1 [9] Separation discharge plate unit [10] 2nd transfer roller L [11] Transfer belt unit [12] Pre-transfer guide plate [13] Pressure arm [14] Registration roller [15] Registration cleaning sheet [16] Loop roller [17] ADU pre-registration roller [18] Intermediate conveyance roller 3 [19] By-pass tray [20] Intermediate conveyance roller 2 [21] ADU lock solenoid (SD6) HV2 High voltage unit 2 Function or method Paper conveyance and paper curl correction in the reverse section Motor drive Fixing of paper that has been transferred See "12. Fixing Section." Paper conveyance while in the double side copy mode Motor drive Separation of the transfer belt and the paper that has been transferred Constant current AC + DC bias applied discharging method Constant current method AC output range: 0 to 300 µA Constant voltage method DC output range: -60 to 0 µA Transfer of toner from the transfer belt onto paper Pressure/release mechanism by means of cam Driven idly by the transfer belt Image formation for paper transfer See "5. Transfer belt unit." Conveyance guide of paper supplied High voltage applied to prevent toner adhesion: -500 V ± 50 V (constant voltage) 2nd transfer roller L pressure/release Motor drive For paper conveyance in the registration section and the correction of paper skew caused by the paper stopper Motor drive Cleaning of the registration roller PET method For paper conveyance in the registration section and loop formation while in paper skew correction Motor drive For paper conveyance while in the double side copy mode and the correction of paper skew correction caused by the paper stopper Motor drive Paper conveyance from the paper feed trays 1 to 3, the bypass tray and HCI Motor drive By-pass paper feed See "9. By-pass feed section." Paper conveyance from the paper feed trays 1 to 3 and HCI Motor drive ADU lock 24VDC drive Supply of high voltage to the separation discharge plate unit and the pre-transfer guide plate Pressure rise method by the inverter from 24VDC 2-50