Phaser 6121MFP Service Manual 5-11
Print-Quality Troubleshooting
4 Inspect the Imaging Unit.
Is the outside of the unit
or the contact dirty?
Clean the unit. If the
problem persists, go
to step 5.
Go to step 5.
5 Inspect the laser window.
Is the window dirty?
Carefully clean the
surfaces. If the
problem persists, go
to step 6.
Go to step 6.
6 Is the 2nd Transfer Roller
contact dirty?
Clean the contact. If
the problem persists,
go to step 7.
Go to step 7.
7 Has the problem been
eliminated?
Complete. Replace the following
units, listed in order,
until the problem is
eliminated:
Toner Cartridge
(page 8-20)
Imaging Unit
(page 8-6),
Transfer Roller
(page 8-56),
Laser Unit
(page 8-50),
Engine Control Board
(page 8-59), and
High Voltage Board
(page 8-57).
Troubleshooting Procedure Table (continued)
Step Actions and Questions Yes No
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