HP Color 9850mfp Service Manual - Page 334
By-pass gate control, By-pass gate operation, For the first copy, For the second copy
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II UNIT EXPLANATION CONVEYANCE 1.2.3 By-pass gate control Q5686A/Q5687A The by-pass gate is provided at the paper path to the stacker section. This is a gate to obtain a high productivity by conveying paper while in stapling with no time wasted. A. By-pass gate operation The by-pass gate [1] is driven by the by-pass gate solenoid (SD705) [2]. For small size paper (A4, B5, 8.5 x 11), the by-pass gate operates on only the first pages of the second and succeeding copies and sends them to the by-pass route [3]. The second pages of the second and succeeding copies are sent into the normal route [4], and the first pages are put upon the second pages to be conveyed to the stacker together. [3] [3] [1] [4] [2] B. By-pass gate control The by-pass gate operates only for small size paper (A4, B5, 8.5 x 11) in the staple mode. The by-pass gate solenoid (SD705) is controlled by the finisher control board (Finisher CB). (1) For the first copy The by-pass gate solenoid (SD705) does not operate while in the paper passage of the first copy. (2) For the second copy A specified period of time after the stapling operation of the first copy turns on, the by-pass gate solenoid (SD705) turns on to pull in the first paper of the second copy to the by-pass side. It turns off a specified period of time after the finisher entrance sensor (PS704) detects the trailing edge of the first paper of the second copy. SD705 does not operate while in the conveyance of the second and succeeding papers. 2-4