Lexmark C925 - Page 29

Lexmark C925/X925 Color Product Study Guide Rev 2.3
For Training Purposes Only 6/21/2011
21
Duplexing
If a page is two-sided, a signal is sent to the Printer Controller Board once the trailing edge of the paper
passes the Paper Exit Sensor. The leading edge of the paper partially feeds from the Exit Rolls and then
reverses direction and feeds into the Duplex Unit. This method of re-feed is called a “Peek-a-boo”.
The Duplex Entry Rollers pass the paper down to the Duplex Transport Rollers along the right side of the
printer. Once the paper reaches the bottom, the Duplex Exit/MPF detection lever senses the leading
edge of the media at the Duplex Exit Roll and it engages the Duplex re-feed clutch to transport the sheet
of paper into the EP paper path.
Note: Once the media reaches the Duplex Exit/MPF detection lever, it shares the same paper path as the
MPF.
The following page illustrates the Duplex paper transport in a cross-sectional of a C925/X925 printer.