Epson Scan 2500 General, Printer Mechanism Operation, Motor Types and Corresponding Functions

EPSON Stylus Scan 2500 Revision A

2.1 General

The main components of the EPSON Stylus Scan 2500 are the printer mechanism, scanner mechanism, and the following circuit boards

Main:	B102 Main Board
Power Supply:	B102 PSB/PSE Board
Panel:	B102 PNL Board

2.2 Printer Mechanism Operation

Like previous EPSON Ink Jet printers such as the Stylus Color 740, the printer mechanism of the EPSON Stylus Scan 2500 does not have an exclusive mechanism to switch from paper feeding to pumping and back. Instead, this control is done by the rotational direction of the paper feed/ pump motor and also depends on the position of the carriage.

The printhead combines the black and CMY heads in one unit. The following indicate the nozzle configurations of these 3 models.

	Black Nozzles:			144 nozzles (120 dpi x 3 rows in staggered)
￿CMY Nozzles:				48 nozzles/colors (120 dpi x 1 row)
		Motor Types and Corresponding Functions
	Motor		Type	Function	For details
					see
	CR Motor		Stepping	Used to drive the carriage.	page 38
				• Drives the ASF to feed paper into
				paper path
				• Drives paper feed rollers at variable
	PF Motor		Stepping	speeds	page 40
				• Drives the CR Lock lever (as
				described on page 44)
				• Drives pump unit to absorb ink

Figure 2-1 in the in the right column shows the outline of the printer mechanism.

Operating Principles General 34