Paper Loading Operation - Epson Stylus PHOTO 1270 Service Manual

EPSON Stylus Photo 870/1270

2.1.4.2 Paper Loading Operation

Multiple paper loading prevention mechanism is included in the ASF unit
to ensure steady paper loading. To prevent any paper from falling from
the paper set position into the paper path, the paper return lever pushes
paper that may have fallen off back onto the hopper. After this motion is
completed, the LD roller starts loading paper. The paper loading
mechanism, including the multiple paper loading prevention mechanism,
is described in the following steps.
1) When the printer power is turned on, the ASF/Pump motor rotates
counterclockwise to detect ASF home position. Then it rotates
clockwise specified steps to set the LD roller and paper return lever in
their standby status. (See "Standby State" in Figure 2-1.)
2) When the paper loading signal is sent from the PC and the Load/Eject
button is pressed, the ASF/Pump motor turns counterclockwise to let
the LD roller start loading paper. (See "Paper Pick Up State" in Figure
2-1.)
3) When the paper is transported to the PF roller, the LD roller stops
where it loses friction. (See "PF Roller Paper Feed State" in Figure
2-1.)
4) When the next print signal is sent and Load/Eject button is pressed*,
the ASF/Pump motor rotates clockwise specified steps to set the LD
roller and the paper return lever in standby status. (See "Standby
State" in Figure 2-1.)
* If the printer does not receive any print signal for TBD seconds in step 4,
the LD roller and the paper return lever automatically return to the
standby state.
OPERATING PRINCIPLES
Hopper
Hopper Spring
LD Roller
Cam
Pad Spring
Paper Return
Pad
Lever
Standby State
Flowchart 2-1. Multiple Paper Loading Prevention Mechanism
Overview
PF Roller Paper
Paper Load State
Feeding State
Revision B
Pinch Roller
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