Epson SEIJ98006 Isolating the Faulty Part according to the Phenomenon, 21. Phenomena Exhibited

EPSON Stylus Color 900 Revision C

3.1.3 Isolating the Faulty Part according to the Phenomenon

Refer to this section if you could not solve the problem in Section 3.1.1 or Section 3.1.2 or need more information to isolate the cause according to the exhibited phenomenon. The contents mostly cover the problems relating to the C265 Main board and their remedies.

Table 3-21. Phenomena Exhibited

No.	Phenomenon Exhibited	Table to refer to
1	The cooling fan does not rotate.	Table 3-22,
	Note the cooling fan does not constantly rotate.
	Refer to Chapter 2 / Section 2.3.7.
2	CR motor does not rotate.	Table 3-23
3	PF motor does not rotate.	Table 3-24
4	pump/ASF motor does not rotate.	Table 3-25, Table 3-26
5	ASF solenoid does not operate.	Table 3-27, Table 3-28
6	Cleaning does not solve the print problem.	Table 3-29 - Table 3-33
7	Ink End Error occurs after the printhead is	Table 3-34
	replaced, so the printhead can not be adjusted.

Table 3-22. Cooling Fan does not Rotate

Step	Check Point					Action
1	Is the fuse (F6)	Place the probes of the tester on the both terminals of
	open?	the chip fuse (F6) on the C265 Main board. Then
		check for electrical continuity. F6 is located beside the
		Q7 which is in front of the cooling fan connector
		(CN13).
2	Is the transistor	Q7 is beside the connector (CN13 for the cooling fan).
	(Q7) defective?	Since the three terminals for the base, emittor, and
		collector are not marked, try every pattern below to
		check for electrical continuity. Be sure to test with the
		correct polarity. The correct findings are shown under
		the figure.
					S t e p			1S t e
		S o ld e r e d
		a r e a
		-	+
			+				-
				S t e p			3S t e
			+ +				-
		-
		Step 1: On, Step 2: Off, Step 3: On, Step 4: Off
3	Is the internal coil	Replace the Fan unit and then check for the correct
	for the fan motor	operation.
	open?
4	Is the C265 Main	If the cause has not been isolated yet, replace the
	board defective?	C265 Main board.

Troubleshooting Overview 92