Print-Quality Troubleshooting 5-23
3
Check each Developer Assembly 
roller for debris or damage,
Does the image quality improve?
Complete Go to Step 4.
4
Replace the Imaging Unit (page 8-5).
Does the image quality improve?
Complete Go to Step 5.
5
Replace the Transfer Roller 
(
page 8-5).
Does the image quality improve?
Complete Go to Step 6.
6
Replace the Fuser (page 8-5).
Does the image quality improve?
Complete Go to Step 7.
7
Check that the springs on the Housing 
Assembly Bias PL6.1.7 are not 
damaged and are correctly aligned to 
ensure contact with the Imaging Unit.
Are the springs in contact?
Go to Step 8. Repair or replace the 
Housing Assembly 
Bias.
8
Replace the HVPS (page 8-109). 
Does the image quality improve?
Complete Replace the Engine 
Control Board
 
(page 8-104).
Troubleshooting Procedure Table (Continued)
Step Actions and Questions Yes No