Epson Photo750 manual Repair of the Printer Mechanism

EPSON Stylus Photo 750 Revision A

Table 3-14. Repair of the Printer Mechanism

Symptom	Condition	Cause	Check Point	Solution
	A vertical	Bi-directional	Perform Bi-D	Refer to Chapter 5
	line is not	alignment is
			adjustment.	“Adjustment”.
	aligned.	not adjusted.
		Head angle is	Perform head	Refer to Chapter 5
			angle	“Adjustment”.
		not correct.
			adjustment.
		Platen gap is	Perform Platen	Refer to Chapter 5
		not right.	Gap adjustment.	“Adjustment”.
Abnormal
	White line	Dot shooting	Perform cleaning
Printing.		direction is	several times
	appears in			Perform the
		tilted because	and check the
	the imaged			cleaning operation.
		head surface	print quality.
	data.
		is not clean.
		I/C is	Install the new
			I/C and perform	Replace I/C.
		defective.
			self-test.
		Head unit is	Head unit is	Replace the head
		defective.	broken.	unit.
			Check if the PF	Clean the PF roller
				by the cleaning
		Friction of the	roller rotates
				sheet. Replace the
		PF roller.	when paper is
Abnormal				PF roller if it does
	Paper is not		not fed.
				not recover.
Paper
	fed.
Feeding.		Abnormal	Check the
			movement of the
		operation of		Replace the ASF.
			ASF hopper
		the hopper.
			visually.

Table 3-15. Repair of the Printer Mechanism

Symptom	Condition	Cause	Check Point	Solution
	Paper is	Malfunction of	Check if the ASF	Replace the
				gears of the
	not fed.	ASF drive	gear rotates
				ASF drive
		change-over.	visually.
Abnormal				change-over.
Paper
				Clean the PF
Feeding.
	Page		Check if the PF	roller by the
	heading	Friction of the	roller slips during	cleaning sheet.
	position is	PF roller.	the paper	Replace the PF
	wrong.		feeding.	roller if it does
				not recover.
		ASF sensor is	Check the signal	Replace ASF
			level of the ASF
		defective.		sensor.
			sensor.
		PE sensor is	Check the signal
			level of the PE
		defective.
			sensor.	Replace PE
		HP sensor is	Check the signal	sensor.
			level of the HP
		defective.
			sensor.
Printer	Fatal error	Head FFC is	Check if the	Connect the
stops during			head FFC is
	appears.	disconnected.		head FFC.
initialization.			connected.
				Replace the CR
		CR motor is	Check the CR	motor if there is
			motor cable is	no problem in
		defective.
			connected.	the cable
				connection.
				Replace the PF
		PF motor is	Check if the PF	motor if there is
			motor cable is	no problem in
		defective.
			connected.	the cable
				connection.

Troubleshooting Unit Repair (Printer Mechanism) 49