Epson SEIJ98006 manual 33. Cleaning does not Solve the Print Problem continued, EPSON Stylus Color

EPSON Stylus Color 900 Revision C

Table 3-33. Cleaning does not Solve the Print Problem (continued)				Unlike the previous products, the procedure after head replacement is
				precisely specified. Therefore, be sure to follow the steps in Table 3-34
	Step	Check Point	Action
				exactly. The background of the procedure is explained after the table.
9		Is the head driving	If a trapezoid waveform is not output in the
		pre-driver defective?	previous step, check all the power transistors (Q3 -
			Q6) for base waveforms. Like the head transistor
			in Step 8, the power transistors also output	Table 3-34.
			trapezoid waveforms, but are input from the pre-
			driver side.	Ink End Error Occurs after Printhead Replacement

	T H	H e a t		S i n	Step	Action
Q 4 Q 3 Q 6 Q 5					1	Turn the printer power off.
					2	Replace the printhead.
B 1 3 8 2 B 1 3D8220					3	Turn the printer back on. (The printer is in No Ink Cartridge
	D 2 0 8 2
B			E			condition.)
					4	Keep the Load/eject button pressed down for several seconds.
T r	f o r	t h e				The printer enters the I/C replacement sequence. (The printer
				t h e		moves to the black ink cartridge replacement position first, then to
	T r		f o r
b la c k n o z z le s						the color cartridge replacement position if the Load/Eject button is
	c o lo r			n o z z
						pressed.)
					5	Input a 21-digit head IC. (Refer to Chapter 4 “Adjustment” for
						details.)
	∝				6	Perform the initial ink charge operations. (Refer to Chapter 4
2 02V
						“Adjustment” for details.)
					7	Perform the head angle adjustment. (Refer to Chapter 4
						“Adjustment” for details.)
					8	Perform the Bi-D adjustment. (Refer to Chapter 4 “Adjustment” for
						details.)
					9	Perform the Uni-D adjustment. (Refer to Chapter 4 “Adjustment”
						for details.)

If the waveforms are not output correctly, replace the IC15/16 or C265 Main board. If the waveform is output correctly, replace the corresponding power transistor.

Troubleshooting Overview 98