Xerox Phaser 6120 Service Manual page 331

Operation 5
While feeding the first 2-sided print out, main
unit produces the print image of the 6th page
of the original on the third sheet of paper.
The second sheet of paper waits at the Duplex
take-up position until the third sheet of paper
is subjected to a switchback sequence.
Operation 6
Immediately before the first 1-sided print
leaves the Paper Exit Roller, the direction of
rotation of the Paper Exit Roller is reversed
and the first 1-sided print for the third sheet is
transported toward and into the Duplex Unit.
At the same time, the second sheet of paper is
fed into the main unit again.
Operation 7
The main unit carries out the first print cycle
for the second sheet of paper to produce the
print image of the third page of the original.
At the same time, the first 1-sided print for the
third is transported through the Duplex Unit.
At the same time, the forth sheet of paper is
taken up and fed into the main unit.
Operation 8
While feeding the second 2-sided print out,
main unit produces the print image of the 8th
page of the original on the fourth sheet of
paper.
The third sheet of paper waits at the Duplex
take-up position until the fourth sheet of paper
is subjected to a switchback sequence.
Steps 6 through 8 are repeated.
Phaser® 6120 Color Laser Printer Service Manual
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Theory of Operation