Lexmark T652 Service Manual page 555

Sensor (duplex input)
The sensor (duplex wait) detects whether media is remaining in the duplex.
Duplex drive motor assembly
The duplex drive motor assembly transmits driving force to the two duplex media transport roll assemblies and
the duplex media center transport roll assembly middle that feeds media.
# Part
1 Duplex drive motor assembly
2 Sensor (duplex input)
Appendix C: Theory of operation
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