Paper Loading Mechanism (Asf Unit) - Epson STYLUS COLOR 480 Service Manual

EPSON Stylus COLOR 480

2.1.5 Paper Loading Mechanism (ASF Unit)

The Paper loading mechanism is positioned at the printer rear. The Paper loading
mechanism loads paper at the ASF unit and feeds paper to the PF roller.
This ASF unit was designed newly for this product and consists of LD roller, Pad
holder (Paper return plate), ASF Frame, Hopper, and so on.
For the major feature of this ASF unit, ASF HP sensor is not used and the single LD
roller is built in the ASF unit.
Drive sent from the PF motor is always transmitted to the ASF unit side. But, the
Change lever and the Clutch mechanism switch ON/OFF the PF motor drive to the LD
roller with the motor rotational direction.
Drive from the PF motor is transmitted to the ASF unit as described below:
o
Switch the PF motor drive to ASF unit side
PF Motor pinion gear rotates CCW direction with a specific steps
Gear 8.4, 21.6 (CW) Combination Gear 11.2, 32.4 (CCW)
rotates (CCW)
Release the Clutch mechanism lock position
Following Figure 2-8 shows you the switching path for PF motor drive to ASF unit
side.
Top View
Figure 2-8. Switch the PF motor drive to ASF unit side
Operating Principles
Combination
Change Lever
Right side view
Spur Gear 35.2
Combination
Gear 22.4, 32
Change Lever
Combination
Gear 11.2, 32.4
Combination
PF pinion gear
Gear 8.4, 21.6
o
Transfer the PF motor drive to LD roller
PF Motor pinion gear rotates CW direction
Combination Gear 11.2, 32.4 (CW)
Combination Gear 22.4, 32 (CCW)
mechanism) LD roller (CW).
Following Figure 2-9 shows the PF motor drive transmission path to the LD roller unit
built in the ASF unit. The LD roller is assembled on the same shaft that the Spur gear
35.2 is assembled.
Top View
Figure 2-9. PF motor drive transmission path
When the PF motor torque is switched to the ASF unit side by the clutch mechanism,
the function of the ASF mechanism varies depending on the rotational direction of the
PF motor, as shown in the table below.
Table 2-3. ASF unit function & PF Motor rotational direction
Directions
Clockwise (*1)
Counterclockwise (*1)
(*1): The PF Motor rotational direction = seen from the right side of the printer.
Overview
Combination Gear 8.4, 21.6 (CCW)
Change Lever rotates (CW)
Spur Gear 35.2(CW) (include the clutch
Right side view
Spur Gear 35.2
Change Lever
Combination
Gear 11.2, 32.4
Gear 8.4, 21.6
PF pinion gear
Corresponding Functions
• Picks up and loads paper
• Release the DE lever & Clutch mechanism
Revision B
Combination
Gear 22.4, 32
Combination
37