Ricoh FW780 Service Manual - Page 425

2.1.2 ROLL EDITION DETECTION [A] MECHANICAL OPERATION B436D503.WMF The roll paper end sensor [A] is located above each roll. When the roll paper runs out and the roll paper end sensor detects the black core of the roll, roll end is indicated on the operation panel. If the paper is not caught by the feed rollers, paper feed fails. In this case, roll end is indicated instead of a paper misfeed indication. 2.1.3 DRIVE MECHANISM [D] [E] [C] [F] [G] [B] [H] B436D102.WMF The roll feed exit roller [B] is driven by the roll feed motor [C] through timing belts [D] and gears [E]. The feed roller [F] of each roll feed unit is driven by the roll feed motor through the belt and each gear and each roll feed clutch [G]. Each feed roller can be driven manually by each knob [H]. SM 7-5 B435/B436 Roll Feed Unit B435/B436