Paper Feed Mechanism; Paper Tray - Epson EPL-5900 Service Manual

EPSON EPL-5900/EPL-5900L

2.2.2 Paper Feed Mechanism

2.2.2.1 Paper Tray

PAPER FEED OPERATION
When the paper feed solenoid (SL1) is turned ON, the driving power from the main motor
(M1) is transmitted to the paper feed roller via the paper feed clutch, and the paper feed
roller rotates.
At the same time, the push down cam rotates, and it lifts the tray. Paper on the tray is carried
into the printer by the paper feed roller.
Separation pad method is used in order to separate each sheet of paper and prevent feeding
the second sheet together.
Since there is no paper size sensor mechanism in the paper tray, the printer detects the
length of paper by the ON period of paper feed sensor (PS1), and judges the paper size.
So, when sheets of paper have the same length, the printer judges the sheets to have the
same size even if they are different in width.
PAPER EMPTY SENSOR
Paper empty sensor (PE1) is mounted on the upper part of the paper tray and it detects the
absence of paper in the paper tray.
When there is paper on the tray, the actuator is lifted and the sensor turns OFF.
When the tray is empty of paper, the actuator falls into the hole in the tray and the sensor
turns ON.
Operating Principles
Paper Feed Sensor(PS1)
Paper Feed Clutch
Paper Feed Solenoid (SL1)
Waiting Mode
Description of Mechanisms
Paper Feed Roller
Push Down Cam
Figure 2-7. Paper Feed Mechanism 1
During Paper Feeding
Tray
Figure 2-8. Paper Feed Mechanism 2
Revision B
Paper Empty Sensor
(PE1)
Tray
Push Down Cam
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