Epson Stylus Color 670, Service Manual

Page: 38 / 152

EPSON Stylus COLOR 670 Revision A
Operating Principles Overview 38
2.1.5 Paper Loading Mechanism (ASF Unit)
The paper loading mechanism is positioned at the printer rear and consists of
paper load roller, paper return lever, hopper, and so on. The paper loading
mechanism loads paper at the ASF unit and feeds paper to the PF roller. The
ASF unit uses a PF motor. Drive sent from this motor is switched between the
ASF unit side and Pump/PF roller side by the disengage mechanism when the
CR unit moves to the left end of the CR guide shaft.
Drive from the PF motor is transmitted to the ASF as described below:
o
Drive sent from PF motor is switched to ASF unit
The CR unit moves to the left end of the CR shaft
→
the DE lever is
pushed to the left end
→
the Spur gear 26.4 moves to the left side
→
the
Spur gear 26.4 revolves PF motor CCW (counterclockwise).
o
Drive transmission to the ASF unit
PF Motor pinion gear
→
Combination gear (3, 30)
→
Spur gear (67.2)
→
Spur gear (26.4)
→
Combination gear (16,40.8)
→
Spur gear (23.2)
→
Spur gear (34)
→
ASF paper load roller shaft
Figure 2-7 shows the disengage mechanism and the parts involved.
When the PF motor torque is switched to the ASF unit side by the disengage
mechanism, the function of the ASF mechanism varies depending on the
rotational direction of the PF motor, as shown in the table below.
(*1): The PF Motor rotational direction = seen from the PF motor pinion gear.
ASF unit stops the paper loading operation when the PE sensor detects that
the paper is loaded to the PF roller.
Figure 2-7. Disengage Mechanism (Top view)
Table 2-5. PF Motor Drive & Function
Directions Corresponding Functions
Clockwise (*1)
• Picks up and loads paper
Counterclockwise (*1)
• Resets paper to the correct paper set
position using the Return Lever.
Spur Gear 26.4
Combination Gear
16,40.8
Spur Gear 23.2
Spur Gear 34
PF Roller
DE lever
Spur Gear 67.2