Epson Stylus Photo785EPX, Service Manual

Page: 39 / 192

EPSON Stylus PHOTO 895/785EPX/915/825 Revision B
Operating Principles Overview 39
Following Figure 2-9. "Switch the ASF Motor Drive to ASF Unit Side" shows the
switching path for ASF motor drive to ASF unit side.
Figure 2-9. Switch the ASF Motor Drive to ASF Unit Side
†
Transfer the ASF motor drive to LD roller
ASF Motor pinion gear rotates CW direction
→
Combination Gear 14.4, 38.4
(CCW)
→
Combination Gear 37.6, 44.4 (CW)
→
Change Lever rotates (CW)
→
Spur Gear 23.2 (CCW)
→
Spur Gear 35.2 (CW) (include the clutch mechanism)
→
LD roller (CW).
Following Figure 2-10, "ASF motor drive transmission path" shows the ASF motor
drive transmission path to the LD roller unit built in the ASF unit. The LD roller is
assembled on the same shaft that spur gear 35.2 is assembled.
Figure 2-10. ASF Motor Drive Transmission Path
When the ASF 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
ASF motor, as shown in the table below.
(*1): The ASF Motor rotational direction = seen from the right side of the printer.
†
Clutch Mechanism
Unlike the previous products, this product dose not have a ASF HP sensor.
Instead of the ASF HP sensor, Change lever and the Clutch mechanism are used to
detect the ASF home position. Following figures describe the mechanism.
Spur Gear 35.2
Spur Gear 23.2
Combination
Gear
14.4, 38.4
Change Lever
Combination
Gear
37.6, 44.4
ASF motor
Spur Gear 35.2
Spur Gear 23.2
Combination
Gear
14.4, 38.4
Change Lever
Combination Gear
37.6, 44.4
ASF motor
Table 2-5. ASF Unit Function & ASF Motor Rotational Direction
Directions Corresponding Functions
Clockwise (*1) • Picks up and loads paper
Counterclockwise (*1) • Release the DE lever & Clutch mechanism