Lexmark Optra C710 Service Manual - Page 56

5016-001 When the setting is four pages The back page of the first printed page is printed after Print Start is pressed. The print is received in the upper unit through the above step and then halted when it reaches the paper exit sensor [S5] through the storage, reverse and skew correction mechanisms in the lower unit. The second page is then fed from the selected paper tray and its back page is printed and transported to the upper unit. The second page stops when it reaches the upper paper pass sensor [S2] and is held there. The first page waiting in the lower unit is fed to the timing roller in the printer. When the timing roller rotates, the motors in the upper and lower units rotate in high speed mode, transferring the second page, waiting in the upper unit, to position in the lower unit. At this time, the front page of the first page is printed and then exits the printer. The printer then prints the front page of the second page and finally the second page, as it is finished, exits the printer. 1-32 Service Manual