2M4/2M5/2M6/2M7-1
1-4-13
(5) White streaks are printed vertically.
(6) Black streaks are printed vertically.
(7) White or black streaks are printed horizontally.
Print example Causes Check procedures/corrective measures
Foreign object in one of the
developer units.
Replace the developer unit (see page 2-4-7,2-4-12).
Dirty LSU slit glasses. Clean the slit glasses.
Dirty slit glasses. Clean the slit glasses (contact glass) (see page 2-4-21).
Dirty CIS sensor. Clean surface glass of CIS sensor.
Dirty contact glass. Clean the contact glass.
Print example Causes Check procedures/corrective measures
Dirty contact glass. Clean the contact glass.
Dirty or flawed drum. Perform the drum refresh (see page 1-3-19).
Flawed drum. Replace the drum unit (see page 2-4-6,2-4-
13).
Deformed or worn cleaning
blade in the drum unit.
Replace the drum unit (see page 2-4-6,2-4-13).
Defective charger roller. Replace the drum unit (see page 2-4-6,2-4-13).
Dirty slit glasses. Clean the slit glasses (contact glass) (see page 2-4-21).
Dirty CIS sensor. Clean surface glass of CIS sensor.
Print example Causes Check procedures/corrective measures
Dirty or flawed drum. Perform the drum refresh (see page 1-3-19).
Flawed drum. Replace the drum unit (see page 2-4-6,2-4-
13).
Dirty developer section. Clean any part contaminated with toner in the developer
section.
Poor contact of grounding ter-
minal of drum unit.
Check the installation of the drum unit. If it operates incor-
rectly, replace it (see page 2-4-13).
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