Epson 2200 - Stylus Photo Color Inkjet Printer, Service Manual

Page: 59 / 258

EPSON Stylus PHOTO 2100/2200 Revision B
OPERATING PRINCIPLES Printer Mechanism 59
The following diagram shows the pump operating principle.
1. When the Pump unit is rotated by the ASF/Pump motor in the CW direction, the
turning roller presses the tube. Therefore, ink is fed from the Cap unit toward the
Waste ink pad.
2. When the Pump unit is rotated by the ASF/Pump motor in the CCW direction, the
roller moves away from the tube and does not press the tube, and ink is not sucked.
Figure 2-14. Pump Operating Principle
2.2.5.3 Capping Mechanism
The Capping mechanism uses the driving force of the Pump unit to come into close
contact with the Head surface to suck ink from the Ink cartridges, Head and Cap,
thereby securing air tightness in the Cap. When the printer is in a standby status or its
power is OFF, the Capping mechanism is in close contact with the Head surface to
secure moisture retention in the Cap, preventing the Head from being clogged with ink
while the printer is stored. The following diagram shows the outline of capping
operation.
Figure 2-15. Capping Mechanism
Cap unit side
To Waste
ink pad
Carriage unit
Cap
Printhead
Slider cap
Ink tube
Slider cap rises to
perform capping.