Phaser 6121MFP Service Manual 5-33
Print-Quality Troubleshooting
Uneven Density in the Feed Direction
The density of the print along the length of the copy is inconsistent.
Initial Actions
Perform the initial actions listed on page 5-5.
Troubleshooting Reference Table
Applicable Parts Example Print
■ Imaging Unit, PL4.0.13
■ High Voltage Board, PL13.0.6
■ Laser Unit, PL4.0.2
■ Transfer Roller, PL7.1.10
■ Toner Cartridge (See consumables
parts list)
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1 Print Test Pattern 3
(page 5-7).
Is the error present in only
one color?
Replace the toner
cartridge associated
with the defect. If the
defect persists, go to
step 2.
Go to step 2.
2 Is the contact terminal of
the Imaging Unit dirty?
Clean the contact
terminal. If the error
persists, go to step 3.
Go to step 3.
3 Is the Laser Unit window
surface dirty?
Carefully clean the
surface. If problem
persists, go to step 4.
Go to step 4.
4 Has the problem been
eliminated?
Complete. Replace the following
units, listed in order,
until problem is
eliminated:
Imaging Unit
(page 8-6),
Laser Unit
(page 8-50),
High Voltage Board
(page 8-57).
Color Uneven or Wrong (Process Direction)
Chrysanthemum x morifolium
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