Epson Stylus Photo 1390 - Page 32

EPSON Stylus Photo 1390/1400/1410 Revision B
OPERATING PRINCIPLES Printer Mechanism 32
2.2.5.2 Drive Transmission Path to Pump Unit
The drive of the Pump Motor is transmitted to the Pump Unit in the following path.
The following shows the internal part names and operation outline of the Pump Unit.
Figure 2-9. Outline of Pump Unit Inside
The following shows the Pump Unit operating principle.
Figure 2-10. Pump Unit Operating Principle
 Ink Suction
1. The Pinion Gear of the Pump Motor rotates in the CW direction.
2. The Roller turns and simultaneously presses the tube.
3. Ink is fed from the Cap Unit toward the Waste Ink Pad.
 Pump Release
1. The Pinion Gear of the Pump Motor rotates in the CCW direction.
2. The Roller moves away from the tube and releases the tube.
3. Ink is not sucked.
Pump Motor
Combination Gear 10.2, 21.2 IS
Pump Unit
Spur Gear 20.4 IS
Pump Motor and Motor Pinion Gear
<Pump Unit inside>
Combination Gear 10.2, 21.2 IS
Spur Gear
20.4 IS
Cap Unit Side
To Waste ink pad