Xerox Phaser 7300B, Service Manual, Page: 250 / 277

8-234 Phaser 7300 Color Printer Service Manual
Duplex Unit
1.
When the duplex unit receives instructions from the printer to print on both sides
of a sheet of paper, the exit gate (duplex) solenoid opens the exit gate (duplex)
after completion of the first side of the print. The path of the paper is switched
when roller 1 turns, just as the paper begins to exit, and the paper is retracted back
into the printer.
2. When the leading edge of the paper passes through the duplex entrance sensor, the
rollers reverse and feed the paper through the duplex unit. The paper is carried
across all the rollers in the duplex unit and through the printer with the other side
printed.
a
b
Roller(1)
Duplex
Entrance
Sensor
Exit Gate
(Duplex)
Solenoid
Exit Gate
(Duplex)
Roller(2)
Roller(3)
Roller(4) Motor
S7300-125