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Epson Stylus COLOR 1520 Service Manual: Asf (auto Sheet Feeder) Mechanism

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Operating Principles

2.2.4.1 ASF (Auto Sheet Feeder) Mechanism

Torque from the PF roller is transmitted to the pick up roller in the ASF mechanism via the planetary
gear by the PF motor drive disengage mechanism which switches the torque based on the detected
position of the CR unit. The pick up roller shaft has 2 arms on the right and left ends. The arms push
down the paper support to make the paper surface contact with the pick up roller. The one way clutch
rotates the puck up roller in the specified direction to load paper. The paper loaded is then fed by the
paper feed mechanism and the gear transmission from the planetary gear is disengaged.
One Way Clutch
Pinion Gear
PF Motor
Disengage Gear
ASF Mechanism
Paper
Pickup Rollers
Arm
ASF transmission Gear
Paper Support
Front PE Sensor
PF Roller
Figure 2-6. ASF Mechanism
2-7
Rev. A

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