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EPL-N2700 Revision A
Operating Principles Printer Mechanism Operating Principles 74
2.1.6.6 Paper Exit Section
The paper fed from the fusing section passes through the paper exit
roller and ejected to the output tray. The transmit power for feeding
paper is given by the transport motor (M2) and transmitted in the order
from 1) ~ 12) shown in the figure.
When the duplex unit is installed, however, drive from the fusing section
is mechanically cut off, and the duplex unit is driven by the internal
motor of the unit. This is performed to eject the paper temporarily and
then switch back the paper for duplex printing.
The paper exit sensor (PC3) detects ejection of paper. This sensor uses
a photointerrupter. During paper is passing through the sensor, the
sensor arm is pressed by the paper so that the end of the sensor arm
engages with the photointerrupter. In this condition, the output of the
photointerrupter is “H”.
When paper has passed the sensor, the sensor arm returns to the
original position by spring force so that the end of the sensor arm comes
off the photointerrupter. As a result, the output of the photointerrupter is
“L”.
Figure 2-29. Paper Exit Sensor Mechanism
Figure 2-30. Paper Exit Mechanism
Paper Exit Sensor
[No paper]
Light passes:
Output=L
Paper Exit Sensor
Paper
Light is blocked:
Output=H
[Paper is present.]
Sensor Arm
PC Drum
Paper Exit Roller
Paper Exit Sensor
Upper Fusing Roller
(Heat Roller)
Paper Path
Lower Fusing
Roller
Transport Motor
Timing Roller
Timing Roller
Front Sensor