Duplex-printing unit
The optional duplex-printing unit (duplexer) adds another reversing sequence to print on both sides
of a page.
NOTE The MFP cannot print on both sides of paper that is 180 mm (7.1 inches) or shorter.
Figure 5-30 Duplex printing paper path
Reversing/duplexing pickup
Whenever the duplex-printing unit is installed and the print job specifies duplex printing, the MFP
feeds the paper into the duplex-printing unit after the reversing operation rather than feeding it into
the output delivery path. The duplex-printing unit feeds the paper into the print engine a second time
so that the second side can be printed. After the paper has entered the reversing unit a second time,
the MFP delivers the paper to the output bin.
NOTE If the top-of-page sensor (PS108) determines that the paper is 180 mm (7.1 inches)
or shorter, the MFP does not feed the paper into the duplex-printing unit after the reversing
operation. The paper is delivered to the output bin instead.
The dc controller PCA controls all of the components in the duplex-printing unit.
Pickup, feed, and delivery system 125