Epson Photo750 manual Repair of the Printing Mechanism

EPSON Stylus Photo 750 Revision A

Table 3-12. Repair of the Printing Mechanism

Symptom	Condition	Cause	Check Point	Solution
			Check visually if
		Head FFC is	the head FFC on	Connect FFC
		out of	the board or
				properly.
		connection.	carriage is
			connected firmly.
		FFC is	Check the FFC	Replace the
		disconnected
			by using a tester.	FFC.
		inside.
	Carriage
Printing is not			Install new I/C
	moves but no	I/C is
performed.	printing is		and perform the	Replace I/C.
		defective.
	performed.		self-test.
			If the condition
			does not improve
			even after 2 or 3
		Head Unit is	times of cleaning	Replace the
		defective.	operation,	head unit.
			replace the head
			unit and perform
			the self-test.
			Check the
		Print head	printing quality	Perform
		surface is not	after performing
				cleaning.
		clean.	the cleaning
			several times.
	Only a
			Check the	Replace the
	particular dot	Head unit is
Abnormal			printing quality	head, if the
	causes
printing		defective.	after performing	print quality
	abnormal
			the cleaning	does not
	printing.
			several times.	recover.
		Absorber in	Visually check	Replace the
		the cap is	the condition of	absorber in
		touching the	the head	the cap if it is
		head surface.	absorber.	deformed.

Table 3-13. Repair of the Printing Mechanism

Symptom	Condition	Cause	Check Point	Solution
		Print head	Perform cleaning
		surface is not	several times	Perform
		clean.	and check the	cleaning.
			print quality.
		FFC is	Check the FFC	Replace the
		disconnected
			by using a tester.	head FFC.
		inside.
		Head FFC is	Install new I/C	Connect Head
		out of	and perform the
				FFC firmly.
	Sometime	connection.	self-test.
	printing is not
			If the condition
	performed.
			does not improve	Replace the
			even after 2 or 3	head unit, if it
		Head Unit is	times of cleaning	does not
Abnormal		defective.	operation,	recover after
			replace the head	performing
Printing
			unit and perform	cleaning.
			the self-test.
		I/C is	Install the new
			I/C and perform	Replace I/C.
		defective.
			self-test.
			Check if the	Connect FFC
		The head FFC	head FFC on the
		is out of	board or carriage	properly.
		connection.	is connected
	Black specks		surely.
	or dots.			Replace the
		The head unit	Check	head if there is
			connection with	no connection
		is defective.
			the head FFC.	problem with
				the FFC.

Troubleshooting Unit Repair (Printer Mechanism) 48