Epson DFX-9000 - Paper Detection

Epson DFX-9000 Revision B
Operating Principles Printer mechanism 66
2.2.4.2 Paper detection
Paper is detected by sensor levers located on the tractors, and reflective
sensors on the Card guide and Paper eject unit.
Paper sensor
The photo sensors on the tractors are shielded or unshielded by the
movement of the sensor-lever. If paper is not loaded, the sensor lever
shields the sensor to indicate that paper is not set on the tractor.
Figure 2-9. Paper detection 1
Sensor Lever
Front
tractor
Photo Sensor
Sensor Lever
Rear Tractor
Photo Sensor