Epson CX4400 - Stylus Color Inkjet, Service Manual

Page: 54 / 129

EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
TROUBLESHOOTING Troubleshooting 54
Table 3-14. Check point for the abnormal noise
Occurrence
timing
CR position
Detailed phenomenon
Defective
unit/part name
Check point Remedy
• Anytime
• Anywhere
The abnormal noise occurs at the first
power on timing and during each
operation although the printing
operation is performed.
Main Frame
1. Check if the grease on the Carriage path is sufficient. 1. Wipe off the remaining grease on the
Carriage path and lubricate it on its frame.
ASF Unit
1. Check if the Change Lever moves smoothly. 1. Replace the ASF Unit with a new one.
The bottom of the Carriage Unit contacts
the surface of the EJ Frame Assy.
EJ Frame Assy
1. Check if the EJ Frame Assy is not bent up. 1. Replace the EJ Frame Assy with a new one.
The Carriage Unit collides to the Paper
Guide Upper Unit during each operation. Paper Guide Upper
Unit
1. Check if the Paper Guide Upper Unit is attached securely.
(check if it interferes with the Carriage Unit)
1. Reassemble the Paper Guide Upper to the
Main Frame.
Table 3-15. Check point for poor scanned image quality
Scanned image
Quality State
Detailed phenomenon
Defective
unit/part name
Check point Remedy
• Scanned image is
not clear.
There are dusts on the Document Glass.
(white dots appear on the scanned
image)
Upper Scanner
Housing
1. Check if there is not any dust on the Document Glass. 1. Remove the extraneous matter from the
Document Glass.
(Refer to
Chapter 6 “MAINTENANCE”
(p.116) .)
There are dusts on the LED in the Rod
Lens Array.
(vertical stripes appear on the scanned
image)
CIS Assy.
1. Check if there is not any dust on the LED. 1. Remove the extraneous matter from the
Document Glass (blow away the dusts).
The LED of CIS Assy. does not light up. CIS Assy. 1. Check if the LED lights up. 1. Replace the CIS Assy. with new one.