HP Color 9850mfp Service Manual - Page 292
Reverse operation and scanning of original back side, Positioning completed
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II UNIT EXPLANATION PAPER FEED Q3228A D. Reverse operation and scanning of original back side The drive system is driven by the conveyance motor (M302). The original returned to the conveyance section (conveyance belt) for scanning of the back side is sent in the reverse way when M302 starts reversing, stopped once, driven at a low speed again, and strikes the origin against the original positioning plate and stops. After the positioning of original, the scanner on the engine side scans the original. Striking control differs between thin paper and others (paper of normal thickness and thick paper), therefore thin paper mode is available to be used for setting the original. [2] [3] [4] [5] [1] [1] Original striking position [2] Return of paper from reverse section due to reverse feeding [3] Stops paper before the expected position- ing point. [4] Strikes the paper against the expected positioning point conveying the paper at a low speed. [5] Positioning completed 2-12
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