EPSON Stylus Photo 720 / EPSON Stylus Photo EX3
Revision A
Operating Principles
Overview
38
Torque sent from the ASF/Pump motor to the ASF unit via the disengage mechanism.
ASF paper loading sequence is described below.
o
Paper loading operation
Like Stylus Photo 750 / Stylus Photo 1200, ASF of this printer has the multiple paper
loading prevention mechanism to provide steady paper loading. This mechanism
prevents a sheet of paper from falling from the paper set position into the paper path.
After and before loading paper, by revolving the PF motor CCW, a paper return lever
in the mechanism 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 is powered on, the CR unit moves to the DE lever switching position
and switches DE position to the ASF side. PF motor revolves CW and ASF home
position is detected by ASF HP sensor. Then PF motor revolves CCW, drives paper
return lever and return the paper to the stand-by position.
2.
When the print signal is sent from the PC or the Load/Eject button is pressed, CR unit
moves to the DE lever switching position and switches DE position to the ASF side. PF
motor revolves CW to let the LD roller load paper.
3.
When PE sensor detects paper loaded from ASF is transported to the PF roller, the ASF
unit stops loading paper. LD roller of ASF stops at ASF HP when ASF HP sensor
detects ASF HP. CR unit switches from DE switching position to CR HP side and
disengages PD roller drive from ASF unit.
4.
When the PF roller ejects paper, CR unit moves to the DE switching position and
switches DE lever to the ASF side. PF motor revolves CCW to drive paper return lever
and returns paper to the stand-by position.
Figure 2-8. Multiple Paper Loading Prevention Mechanism (right side view)
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3
LD Roller
Cam
Hopper
Hopper Spring
Pinch Roller
Pad
Pad Spring
Paper Return
Lever
[Stand-by State]
[Paper Pickup State]
[PF Roller Paper Load State]
Содержание Stylus Photo 720
Страница 5: ...Revision Status Revision Issued Date Description Rev A April 6 2000 First Release ...
Страница 8: ...C H A P T E R 1 PRODUCTDESCRIPTION ...
Страница 29: ...C H A P T E R 2 OPERATINGPRINCIPLES ...
Страница 51: ...C H A P T E R 3 TROUBLESHOOTING ...
Страница 64: ...C H A P T E R 4 DISASSEMBLYANDASSEMBLY ...
Страница 94: ...C H A P T E R 5 ADJUSTMENT ...
Страница 114: ...C H A P T E R 6 MAINTENANCE ...
Страница 121: ...C H A P T E R 7 APPENDIX ...
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