5-30 Phaser 6300/6350 Color Laser Printer Service Manual
Dirty Vertical Streaks on the Edges of the Page
Simplex Print: Streaks are on the back side of the page.
Duplex Print: Streaks are on both sides of the page.
Note
The most likely cause of this artifact is high clay content paper. This component 
in the paper gums up the Transfer Roller cleaning blade. It can also be caused by 
a full Transfer Roller waste toner reservoir and other problems.
5
Replace the Laser Unit, (page 8-76).
Does the image quality improve?
Complete Replace the Engine 
Control Board
 
(page 8-104).
Troubleshooting Reference Table
Applicable Parts Example Print
■ Imaging Unit, PL6.1.1
■ Transfer Roller, PL5.1.4
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1
Is the problem resolved by using 
different media?
Complete Replace the Transfer 
Roller (
page 8-5).
2
Replace the Transfer Roller 
(
page 8-5).
Does the imaging quality improve?
Complete Replace the Imaging 
Unit (
page 8-5).
Troubleshooting Procedure Table (Continued)
Step Actions and Questions Yes No
s6300-121