Service manual

EPSON Stylus Photo R340/350 Revision A
Troubleshooting Troubleshooting 34
• White bands/
Color
unevenness
A vertical (perpendicular to the CR
moving direction) white line (trace of
Star Wheel) appears on printouts.
EJ Frame Assy. 1. Check if the Star Wheel Holder has not come off. 1. Install the Star Wheel Holder correctly.
2. Check if the EJ Frame Assy. surface stays in a horizontal
position.
2. Replace the EJ Frame Assy. with a new one.
EJ Roller Assy. 1. Check if the EJ Roller Assy. has not come off the Printer
Mechanism.
1. Install the EJ Roller Assy. correctly.
Printouts are faint Printer driver and
Special paper
1. Check if appropriate type of paper is used in accordance
with the printer driver setting.
1. Use an appropriate type of paper in
accordance with the printer driver setting.
Print Head 1. Check if the Head ID written in the EEPROM is correct
using the Adjustment Program.
1. Write the correct 15-digit Head ID to the
EEPROM with the Adjustment Program.
• Displacement
of the print start
position
Printing operations are performed
properly, but the top margin is narrower
than usual.
Shaft Assy. Holder 1. Check the LD Roller surface if it is free of paper dust. 1. Wipe the paper dust on the LD Roller with a
clean cloth moistened with alcohol.
* If the problem still occurs after performing
the above remedies, replace the LD Roller
with a new one.
Table 1-14. Print Quality Problems (continued)
Problems Description Failed Part Check Point Remedies
Star Wheel Holder
EJ Frame Assy.
LD Roller