Epson Scan 2500 service manual Epson Stylus Scan Revision a

EPSON Stylus Scan 2500						Revision A
			Table 3-4. Repair of the Printer Mechanism (cont.)
	Symptom	Condition		Cause	Check Point	Solution
		A vertical line is not		Bi-directional alignment is	Perform Bi-D adjustment.	Refer to Chapter4.
		aligned.		not adjusted.
				Head angle is not correct.	Perform head angle adjustment.	Refer to Chapter4.
	Abnormal printing
				Platen gap is not correct.	Perform platen gap adjustment.	Refer to Chapter4.
	(continued)
				Dot shooting direction is	Perform the cleaning operation several
		White line appears in		tilted because head		Perform the cleaning operation.
					times and check printing.
		the image data.		surface is not clean
				I/C is defective.	Install a new I/C and perform the self-	Replace I/C.
					test.
				Head unit is defective.	Perform the cleaning operation several	Replace the head unit.
					times and check printing.
					Check if the PF roller rotates when paper	Clean the PF roller by the cleaning
				Friction of the PF roller.		sheet. Replace the PF roller if it
					is not fed.	does not recover.
				Abnormal operation of	Check movement of the ASF hopper	Replace ASF.
	Abnormal paper			the hopper.	visually.
		Paper is not fed.
	feeding.
				Malfunction of ASF drive	Check if the ASF gear rotates visually.	Replace gears of the ASF drive
				change-over.		change-over.
					Check if the PF roller slips during paper	Clean the PF roller by the cleaning
				Friction of the PF roller.		sheet. Replace the PF roller if it
					feeding.
						does not recover.

Troubleshooting Printer Related Troubleshooting 68