Xerox Phaser 6115 MFP, Service Manual

Page: 98 / 532

2-54 Phaser 6115MFP Multifunction Product Service Manual
Theory of Operation
Duplex Transport Operations
The following steps detail the transport operations for single, hand-fed sheets.
1. The first sheet of paper is taken up and fed in from the main tray and the
first print cycle begins. Immediately before the one-sided print leaves the
Exit Roller, the direction of rotation of the Exit Roller is reversed and the 1-
sided print is transported toward and into the Duplex Unit.
2. The print moves through the Duplex Unit and is temporarily stopped at the
Duplex take-up position. Any skew in the paper is corrected at the
Registration Roller before the paper is fed by the Duplex Unit.
3. The second print cycle begins to produce the second image on the
original sheet. While feeding the first two-sided print to the Exit Tray, the
first print cycle for the second sheet begins. This process repeats until the
print job is complete.
4. The first sheet of paper is then taken up and fed in from the tray and the
first print cycle begins to produce the print image on the second page of
the original. Immediately before the first one-sided print leaves the Exit
Roller, the Exit Roller is reversed and the first 1-sided print is transported
into the Duplex Option.
5. At the same time, the second sheet of paper is fed into the print engine.
The first print cycle for the second sheet produces the image on the fourth
page of the original.
6. Also at the same time, the first 1-sided print is transported through the
Duplex Option. The main unit produces the print image of the first page of
the original on the first one-sided print that has been fed through the
Duplex Option. At the same time, the second sheet of paper is subjected
to a switchback sequence at the exit section and fed into the Duplex
Option. Also, the third sheet of paper is taken up and fed into the main
unit.
7. While feeding the first 2-sided print out, the 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.
8. Immediately before the first one-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.
9. At the same time, the second sheet of paper is fed into the main unit
again.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 Option. Also at the same time, the forth sheet of paper is taken up
and fed into the main unit.
10. 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. The process
repeats until the print job is complete.