Pe Detector; Transmission Path Of Driving Force For Paper Feed - Epson Stylus Photo RX700 Service Manual

EPSON Stylus Photo RX700

2.2.4.3 PE Detector

Function : • Detection for paper positioning control
• Detection of the paper tail end
Detector specifications
Item
Detection method Photo-electric conversion system (transmissive type) SHARP GP1S94
Open-collector Collector withstand voltage 30 V or below
Electrical Sink current 0.3 mA or below
characteristics
Drive voltage 1 3.3 V ± 5%
Drive voltage 2 3.3 V ± 5%
Detected Condition
There is no paper
There is paper
Recognition of the change of the PE signals:
The recognition during driving of the ASF Motor is such that the signal is read and
judged immediately (within 100 µs) after phase switching.
NOTE: Once "no paper" has been detected during driving of the PF Motor,
paper detecting operation does not take place during paper feeding by
the PF Motor until paper ejecting operation is completed.

2.2.4.4 Transmission Path of Driving Force for Paper Feed

Transmission Gear 12
Epicyclic Gear 12 Composite Gear 12, 10
No transmission during
CCW rotation
Idle Roller Shaft Assy
See Flowchart 2-1.(p.32)
Flowchart 2-1. Transmission Path of Driving Force from the PF Motor
Operating Principles
Specifications
Switch Mode Detector Output
Closed 2.4 V or above
Open 0.4 V or below
PF Motor
PF Roller Assy
EJ Transmission Gear B
Front Paper Eject Roller Shaft
Spur Gear 15.5
Rear Paper Eject Roller Shaft
Mechanism Operating Principles
Idle Roller Shaft Assy
(Transports the front-
loaded paper)
Epicyclic Gear Holder
Engaged
During CW rotation, the Epicyclic Gear
Holder turns clockwise, and the Epicyclic
Gear and Idle Roller Shaft Assy are engaged
to transmit driving force.
Idle Roller Shaft Assy
PF Motor
PF Roller Assy
EJ Transmission Gear B
Figure 2-15. Transmission Path of Driving Force from the PF Motor
Revision A
PF Roller Assy
Composite Gear 12, 10
Transmission
Gear 12
Disengaged
Epicyclic Gear 12
Rear Paper Eject
Roller Shaft
Spur Gear 15.5
Front Paper Eject Roller Shaft
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