EPSON Stylus CX7300/CX7400/DX7400/NX200/TX200 series/SX200 series/Stylus CX8300/CX8400/DX8400/NX400/TX400 series/SX400 series Revision C
TROUBLESHOOTING      Error Indications and Fault Occurrence Causes 84
Confidential
Table 3-20.  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.
Carriage Unit
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 Carriage Unit collides to the Upper 
Paper Guide Unit during each operation.
Upper Paper Guide 
Unit
1. Check if the Upper Paper Guide Unit is attached 
securely. (check if it interferes with the Carriage Unit)
1. Reassemble the Upper Paper Guide to the 
Main Frame.
Table 3-21.  Check point for the defective scanned image quality
Print Quality 
State
Detailed phenomenon
Defective
unit/part name
Check point Remedy
• Scanned image is 
not clear.
There are dusts or the like on the 
Document Glass. (white dots appear on 
the scanned image)
Upper Scanner 
Housing
1. Check if there is any foreign material on the Document 
Glass.
1. Remove the foreign material from the 
Document Glass. 
(Refer to Chapter 6 “MAINTENANCE” 
(p.151).)
There are dusts or the like on the LED 
inside the Rod Lens Array. (vertical 
stripes appear on the scanned image)
Scanner Carriage 
Unit
1. Check if there is not foreign material on the LED. 1. Remove the foreign material from the 
Document Glass (blow away the dusts).
The LED of Scanner Carriage Unit does 
not light up.
Scanner Carriage 
Unit
1. Check if the LED lights up. 1. Replace the Scanner Carriage Unit with a new 
one.