Xerox Phaser 6121MFP Service Manual page 258

Print-Quality Troubleshooting
5-32
Troubleshooting Procedure Table (continued)
Step Actions and Questions
6 Check the document
setting.
Is the document placed
on the document glass
correctly?
7 Is the paper dry, a
recommended type, and
loaded in the correct
position?
8 Print Test Pattern 3.
Does the defect persist?
9
Check that the paper tray
paper guides are set
correctly.
Does the defect persist?
10
Reseat the Imaging Unit.
Does the defect persist?
11 Inspect the Feed Roller.
Clean (page 7-5) or
replace as necessary.
Does the problem persist?
12 Replace the Laser Unit
(page 8-50).
Does the problem persist?
13 Replace the Engine
Control Board
(page 8-59).
Yes No
Replace the Scanner Reseat the document.
(page 8-31).
Go to step 8. Replace the paper
with paper that is
new, dry, and
approved for the
printer, then go to
step 8.
Go to step 9. Complete.
Go to step 10. Complete.
Go to step 11. Complete.
Go to step 12. Complete.
Go to step 13. Complete.
Phaser 6121MFP Service Manual