Epson EPL-N4000, Service Manual

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EPSON EPL-N4000/EPL-N4000+ Chapter 2 Operating Principles
Rev.B 83
Registration Sensor
Monitors paper travel out of the paper tray.
No Paper Sensor 1
Monitors the paper level in Feeder 1. When the Lift Motor raise the
Bottom Plate, the Plate raises the paper stack, the stack pushes the
No Paper Actuator up and away from the No Paper Sensor. The
Sensor sends a paper present signal to the MCU PWB. When the
last sheet of paper is fed out of the Paper Tray, the No Paper
Actuator drops through a cutout in the Bottom Plate. The Actuator
then blocks the Sensor, and the Sensor sends a no paper signal to
the MCU PWB.
Figure 2-41. No Paper Sensor
Level 1 Sensor
Monitors whether or not Tray 1 is installed. Installing the Tray
pushes the Link Stopper out, which in turn lowers the Feed Roll and
moves the Level 1 Sensor Actuator tab away from the Sensor
window.
Figure 2-42. Level 1 Sensor
MSI Size Sensor
Monitors the size of paper that is loaded in the MSI.
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