Printer Mechanism - Epson Stylus COLOR 440 Service Manual

EPSON Stylus COLOR 440, 640, and 740

2.1 Printer Mechanism

The printer mechanism includes all the mechanical components that
enable printing to take place. These components include the printhead
(PH) and carriage (CR) unit, the paper feed (PF) and paper eject rollers,
the auto-sheet feeder (ASF), and the pump unit which is used in
printhead cleaning operations.
Like some previous versions of EPSON ink jet printers, the paper feed
motor in the Stylus COLOR 440, 640, and 740 is used not only for paper
feeding, but also to pump ink and drive the auto-sheet feeder. The
direction of the paper feed motor, along with the position of the carriage,
determines which operations are performed. Figure 2-1 shows how the
main components of the printer mechanism interact.
Figure 2-1. Printer Mechanism Block Diagram
Chapter 2 Operating Principles
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