Lexmark MS911 Service Manual page 672

Booklet maker staple unit operation
For booklet jobs, the aligner moves the paper stack to the staple unit before folding.
The motor (booklet maker staple unit) controls the stapling process. The paper stack is held between the paper press
and clincher for stapling. The stack is then fed to the bifold section.
# Part
1 Staple unit
2 Motor (booklet maker aligner)
3 Sensor (booklet maker aligner home)
4 Aligner
5 Tamper assembly
Appendix C: Theory of operation
672
4021, 7421