Epson 2200 Service Manual - Page 59

EPSON Stylus PHOTO 2100/2200 Revision B 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. Cap unit side 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. Carriage unit Slider cap To Waste ink pad Figure 2-14. Pump Operating Principle Printhead Cap Ink tube Figure 2-15. Capping Mechanism Slider cap rises to perform capping. OPERATING PRINCIPLES Printer Mechanism 59