Epson Scan 2500 service manual Platen GAP Lever, Motor, Unit Forward, Normal, Position Front

EPSON Stylus Scan 2500 Revision A

PLATEN GAP LEVER

		Home position	Carriage
	Timing	sensor	motor
Paper feed
	belt	Carriage
roller		unit

		Forward	Rear (thick
Paper eject			paper) position
		(normal)
rollers	Paper guide	position
	(front)
		Platen Gap
		lever	Parallelism
			adjust
			lever

Figure 2-6. Carriage Mechanism with platen gap lever (Top view)

As shown in Figure 2-6, the Platen Gap lever can be moved forward or back to adjust for the thickness of the paper. The PG lever is connected to the carriage guide shaft, which raises or lowers the carriage depending on the PG lever position. The nozzle surface remains parallel to the paper in either position thanks to a tilt adjustment mechanism. Also, the two parallelism-adjustment levers, one mounted on each side of the carriage guide shaft, adjust the parallelism between the platen and shaft when the shaft is installed in the factory. This precise adjustment is necessary to make sure the gap between the platen surface and the printhead surface is 1.04 mm in the normal position or 1.74 mm in the thick-paper position.

Operating Principles Printer Mechanism Operation 39