Lexmark Optra W810 Service Manual page 77

4023-001
After the printer sends a paper take-up signal, the separator/feed
rolls and paper take-up roll 1 transports the paper until the paper
blocks registration sensor RSEN. The paper travels a little further to
reach the vertical transport roller and form a registration loop before
stopping. The vertical transport roller transports the paper to the
printer.
After the trailing edge of the paper transported by the vertical
transport roller unblocks paper empty sensor 1 PPS1, paper take-up
roll 1 and 2 transport the subsequent sheet of paper until the
subsequent sheet of paper blocks PPS1.
1-51
General Information