Lexmark X543 Service Manual page 192

7525-xxx
When the trailing edge of the media clears the fuser, the fuser engine rotates forward to prepare the fuser for the
page travelling through the duplexer.
As the media reaches the gate aligner, a sensor (S1) is triggered indicating the presence of the leading edge.
When the S1 sensor is triggered, the paper continues to the S2 sensor. When the S2 signal is detected, the
speed of the paper is adjusted to accommodate the speed of the transfer belt, ensuring the proper registration of
the image on the media. The paper travels to the ITU (C) and the second image is transferred to the reverse side
of the media.
Once the imaged is transferred, the media travels to the fuser (D), the fuser exit rolls (E), and the output bin.
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Service Manual