Epson STYLUS Scan 2500 Service Manual page 41

EPSON Stylus Scan 2500
To the eject rollers:
PF motor pinion gear (CCW rotation)
(13.5, 308) Spur gear (28)
NOTE: Above CCW rotation is mentioned viewing from the PF motor pinion
gear side.
Figure 2-8 shows a paper feeding mechanism block diagram, which
includes the parts along the PF motor drive-transmission paths.
Gear
73.6
PF motor
Combination
Gear 28
Gear13.5,30.8
Figure 2-8. Paper Feeding Mechanism (Top View)
The printer feeds paper from the ASF (when the PE sensor located near
the carriage motor detects paper is loaded) through the paper path and
stops feeding when the paper's leading edge reaches the halfway point of
the front paper guide. To correct for any misfeeding, the paper is fed back
toward the ASF a predetermined number of steps and then it is fed
forward again until it reaches the top-of-form position.
Once the printer starts printing, it advances paper using the PF rollers and
subrollers until it reaches the last 14mm of the paper, when it advances
the paper using the star wheel gear and paper eject rollers.
Torque sent from the ASF/Pump motor to the ASF unit via the disengage
mechanism is used for the following operation.
Operating Principles
Gear 73.6 Combination gear
Paper eject rollers
PF Roller
Paper Eject Roller
Star Wheel Assy.
Printer Mechanism Operation
Revision A
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