Epson 680Pro Service Manual - Page 39
Capping Mechanism, Cap Mechanism
UPC - 010343832138
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EPSON Stylus COLOR 680/777/77i 2.1.6.2 Capping Mechanism The capping mechanism covers the printheads with the cap holder to prevent the nozzle from increasing viscosity when the printer is in stand-by mode or when the printer is off. This product has valveless cap system. Air valve function used for the previous models pumps and ejects ink only inside the cap by absorbing ink with the valve open. By opening the Air valve, the negative pressure is decreased and only the ink inside the cap is ejected. (the ink is not absorbed from Ink cartridge or head cavity.) But, valveless cap system, this operation is done out side of the capping area. The CR moves to left side of the Cap assembly and the pump absorbs the ink inside the cap. Viewed from front side CR unit Printhead Cap Slider cap Waste Ink tube Figure 2-14. Cap Mechanism Slide up Operating Principles Overview Revision B 39