Phaser 6128MFP Service Manual 5-11
Print-Quality Troubleshooting
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1 Check the toner type.
Are the Toner Cartridges genuine
Xerox?
Replace with
Xerox toner,
then go to step
2.
Go to step 3.
2 Is the image printed correctly? Complete Replace the IP
Board
(page 8-41).
3 Reseat and lock the Toner
Cartridges.
Is the image printed correctly?
Complete Go to step 4.
4 Check the Transfer Belt high-voltage
connections..
Are the contacts on the Transfer Belt
and springs damaged or dirty?
Clean or
replace the
Transfer Belt
(page 8-103) or
spring(s), then
go to step 5.
Go to step 6.
5 Is the image printed correctly? Complete Go to step 6.
6 Check the paper condition
Is the paper dry and recommended
paper?
Go to step 8. Replace the
paper with a
new dry and
recommended
one, then go to
step 7.
7 Is the image printed correctly? Complete Go to step 8.
8 Check the Toner Cartridge life .
Are one or more of the Toner
Cartridges near end of life?
Replace the
To ne r
Cartridge(s)
(page 8-13).
Go to step 9.
9 Inspect the laser beam windows of
the Laser Unit
Are the laser beam windows on the
Laser Unit clean?
Go to step 10. Clean the
window(s) with
soft cloth or
cotton swab.
10 Inspect the laser beam path
Are there any obstructions between
the Laser Unit and Imaging Unit?
Remove the
foreign
substances.
Go to step 11.
11 Reseat the Imaging Unit.
Is the image printed correctly?
Complete Go to step 12.
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