Epson SEIJ98006 25. Pump/ASF Motor does not Operate, EPSON Stylus Color, Revision C, Overview

EPSON Stylus Color 900	Revision C
Table 3-25. Pump/ASF Motor does not Operate	Table 3-26. Pump/ASF Motor does not Operate (continued)

Step	Check Point	Action
1	Getting ready for	The connector used to control the Pump/ASF motor
	inspecting	is indicated in the figure below. Using the oscillo
	waveforms.	scope, check the 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 Pump/ASF motor connected.

Step	Check Point	Action
2	Check of the	While trying to drive the Pump/ASF motor, the
	waveform and	waveform output from each phase should be as
	remedies.	shown below. If the waveforms output from each
		phase are as shown below, replace the Pump/ASF
		motor. If not, replace the IC13 (Pump/ASF motor
		driver IC) or C265 Main board.

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

C / M	C	/ M
	K L B
P h a s e A , P h a s e B , P h a s e
f r o m t h e P in 1 m a r k

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.

/ A ,

NOTE:

2 02V∝0

a s e / B

∝

2 02V0

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 94