Epson WF-C5790 Service Manual page 66

EPSON WF-C5790/WF-C5790a/WF-C5710/ET-8700/WF-C5210/WF-C5290/WF-C5290a
Venting Valve
Before capping, the Valve Lever interferes with the Link Lever, therefore the
Venting Valve opens.
During the capping sequence, the Valve Lever shaft moves along the Wiper/
cap-drive Cam Slot, and the Valve Lever drops backwards. When this happens,
the Valve Lever and Link Lever interference is removed, and the return force
of the Compression Spring makes this slide to the 80-digit side, closing the
Venting Valve.
Configuration and operating principles
Pump Tube (to Cap)
Valve: Open (vented)
Operating principles
Wiper/cap-drive Cam
(side of 0-digit side)
The rotation of the Wiper/cap-
drive Cam moves the salient of
the Wiper Drive Lever along
the cam surface of the Wiper/
cap-drive Cam (red part) to
move the valve open and close.
Compression Spring
Link Lever
Valve: Closed
Figure 3-50. Venting Valve
Revision A
Shaft
Valve Lever
Wiper/cap-drive
Cam
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