Paper Loading Mechanism - Epson Stylus Pro 3800 Service Manual

Epson Stylus Pro 3800/3800C/3850/3880/3885/3890

2.6.2 Paper Loading Mechanism

ASF (AUTO SHEET FEEDER)
The ASF, whose driving source is an ASF motor, consists of a LD roller, LD roller
shaft, ASF sensor, hopper, and paper anti-slip tab. The cams on both ends of the LD
roller shaft activate the hopper and the paper anti-slip tab. The ASF sensor (photo
interrupter sensor) controls the rotational position of the LD roller shaft by detecting
the light-shielding plate installed on the shaft. Paper loading operation from the ASF is
described below:
1. Start of the paper loading operation
The ASF motor moves to rotate the LD roller shaft.
2. Feeding paper to the paper loading position
2-1. The LD roller shaft rotates to release the lever that presses the paper anti-
slip tab, and the tabs go down.
Hopper
Paper Anti-slipTab
Figure 2-20. Lowering the Paper Anti-slip Tab
OPERATING PRINCIPLES
3.
ASF Motor
Lever LD Roller Shaft
Paper Feed Mechanism
2-2. The LD roller shaft rotates to release the hopper actuating the cam that
presses the hopper, and the hopper moves up by the tension of the spring.
Hopper
Hopper Actuating Cam
Standby
Figure 2-21. Raising the Hopper
Picking-up paper
The LD roller shaft rotates to feed a single sheet of paper into the printer with a LD
roller.
Paper
Separation Pad
Retard Roller
Figure 2-22. Picking-up Paper
Revision C
LD Roller
Raising
Hopper
LD Roller
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