AR-F15 (serv.man2). Service manual - Sharp Copying Equipment Service Manual (repair manual). Page 125

The paper folding mechanism consists of a guide plate, paper folding rollers, paper pushing

plate, and paper positioning plate.

The guide plate is used to cover the folding rollers while sheets are output so as to prevent

sheets from coming into contact with the folding rollers during output. Before the stack is folded,
the guide plate moves down to enable the folding rollers to operate.

The folding rollers are driven by the paper folding motor (M2S), and the drive of the motor is

monitored by the paper folding motor clock sensor (PI4S). The mechanism is also equipped with a
paper folding home position sensor (PI21S) for detecting the position of the paper folding rollers.

The paper pushing plate is driven by the paper pushing plate motor (M8S), and the drive of the

paper pushing plate motor is monitored by the paper pushing plate motor clock sensor (PI1S). The
paper pushing plate home position sensor (PI14S) and the paper pushing plate top position sensor
(PI15S) are used to detect the position of the paper pushing plate.

After being folded into two by the paper folding rollers, a stack is moved ahead by the delivery

roller for delivery. The delivery roller is driven by the paper folding motor. The delivery sensor
(PI11S) is mounted to the delivery assembly to detect delivery of paper. The tray paper sensor
(PI6S) is used to detect the presence/absence of paper on the tray, but does not detect jams. The
vertical path paper sensor (PI17S) serves to detect the presence of paper after jam removal.