Transport Components; Duplexing (Models With Duplex Support Only) - Lexmark X543 Service Manual

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Transport components

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In summary, the media is fed from the tray into the printer by a feed roll and carried to the transfer roll (ITU). The
pick rollers time the media to enter the EP process at just the right moment.
The pick rollers push the media to the ITU where the image is transferred to the page.
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The transfer roller moves the media to the fuser where heat and pressure are applied to the page. The fuser
rollers push the media toward the exit bin and past the exit sensor. The exit rollers guide the paper into the
output bin.
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Note: If the printer posts a paper jam message but no paper is found, paper dust or paper particles may have
fallen in one of the sensor eyes. Use a can of compressed air to gently clean the sensor.

Duplexing (models with duplex support only)

The MFPs with duplex support use a secondary paper path in the front cover and the 250-sheet paper tray to
print on the second side of a sheet of paper. The following steps summarize the duplexing process.
After the first side of the media is printed and the trailing edge of the paper clears the fuser exit sensor, the fuser
motor reverses. The reversed motor pulls the media into the duplexer paper path. In addition to the fuser motor
reversing, the pick motor also reverses. The pick motor drives the duplex aligner rolls (A) which push the media
down to the bottom turnaround in the paper tray and gate aligner (B).
Note: While the sheet is being transported through the front door and paper tray, it is the only piece of media
being processed by the print engine. A user should not attempt to insert a piece of media into the manual paper
feed while a duplex job is being processed. This would invoke a paper jam error.
Diagnostic aids
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