Epson SEIJ98006 manual CR Motor does not Operate 24. PF Motor does not Operate, A s e R k

EPSON Stylus Color 900	Revision C
Table 3-23. CR Motor does not Operate	Table 3-24. PF Motor does not Operate

Step	Check Point	Action
1	Getting ready	The connector used to control the CR motor is indicated
	for inspecting	in the figure below. Using the oscillo scope, check for the
	waveforms.	waveform for each phase at the indicated connector.
		To check the waveform, press the Load/Eject button to
		attempt to move the carriage. Be sure to leave the cable
		for the CR motor connected.
		P h a s e A , P h a s e B ,
		P h a s e / B f r o m t h e

F S A	E P	H R C	M /
		D E R
			C
		T H W

C / M C / M

K L B

		NOTE: The GND can be output by placing the probe of
		the oscillo scope to the tapped hole in the
		bottom plate on the board with a screw. Note
		the connector has no ground line since this
		printer drives the motor with the bipolar system.
2	Check of the	While trying to drive
	waveform and	the CR motor, the
					2	∝0
	remedies	waveform output
			2	0 V
		from each phase
		should be as shown
		in the figure. If the
		waveform output
		from each phase is
		as shown below,
		replace the CR
		motor. If not,
		replace the IC12 (CR motor driver IC) or C265 Main
		board.
		NOTE: The GND can be output by placing the probe of
		the oscillo scope to the tapped hole in the
		bottom plate on the board with a screw.

Step	Check Point	Action
1	Getting ready	The connector used to control the PF motor is indicated
	for inspecting	in the figure below. Using the oscillo scope, check for the
	waveforms.	waveform for each phase output from the indicated
		connector. To check the waveform, press the Load/Eject
		button to attempt the ASF paper feeding. Be sure to
		leave the cable for the PF motor connected.

P h a s e		/ A ,	a			M
P in	1	m a r k .		E P	H R C
					D E R	/
						C
					T H W
			/	M	C / M
					K L B

		P h a s e		A ,			P h a
		f r o m	t h e				P in
		NOTE: The GND can be output by placing the probe of
		the oscillo scope to the tapped hole in the
		bottom plate on the board with a screw. Note
		the connector has no ground line since this
		printer drives the motor with the bipolar system.
2	Check of the	While trying to drive
	waveform and	the PF motor, the
	remedies.	waveform output from		2	0	V∝		2	0
		each phase should be
		as shown in the
		figure. If the
		waveform output from
		each phase is as
		shown in the figure,
		replace the PF motor.
		If not, replace the
		IC11 (PF motor driver IC) or C265 Main board.
		NOTE: The GND can be output by placing the probe of
		the oscillo scope to the tapped hole in the
		bottom plate on the board with a screw.

Troubleshooting Overview 93