Canon iR6570 series Service Manual page 319

Chapter 8
[1]
[1]
[2]
[2]
F-8-147
5) While pushing the 2 stopper plates [1] of the rail assembly of the
fixing feed unit toward the inside, slide out the fixing feed unit [2] to
the front.
[1]
F-8-148
6) Remove the 2 screws [1], and detach the fixing feed unit [2] from the
rail.
8-55