Xerox 6250DT - Phaser Color Laser Printer Service Manual page 198

Troubleshooting Procedure
Step Check
Replace the Sub-HVPS, page 8-87.
8
Does the image quality improve if the
Sub-HVPS is replaced?
Replace the Laser Unit, page 8-68.
9
Does the image quality improve if the
Laser Unit is replaced?
Print-Quality Troubleshooting
Yes
Complete
Complete
No
Go to Step 9.
Replace the Engine
Control Board,
page 8-107.
5-17