Black Streaks Are Printed Vertically; Streaks Are Printed Horizontally; Spots Are Printed - Kyocera ECOSYS FS-4300DN Service Manual

(6) Black streaks are printed vertically.

Print example
Dirty or flawed drum.
Deformed or worn cleaning
blade in the drum unit.
Defective transfer roller.
Defective chager roller.
Defective developer roller.

(7) Streaks are printed horizontally.

Print example
Dirty or flawed drum.
Dirty developer section.
Poor contact of grounding ter-
minal of drum unit.
The beam detection error of a
laser scanner unit

(8) Spots are printed.

Print example
Dirty or flawed drum.
Deformed or worn cleaning
blade in the drum unit.
Flawed developer roller.
Dirty heat roller and press
roller.
Causes
Perform the drum surface refreshing operation.
Flawed drum. Replace the drum unit (see page 1-5-15).
Replace the drum unit (see page 1-5-15).
Replace the transfer roller unit (see page 1-5-16).
Replace the chager roller unit (see page 1-5-15).
Replace the developer unit (see page 1-5-13).
Causes
Perform the drum surface refreshing operation.
Flawed drum. Replace the drum unit (see page 1-5-15).
Clean any part contaminated with toner in the developer
section.
Check the installation of the drum unit. If it operates incor-
rectly, replace it (see page 1-5-15).
Replace the laser scanner unit
(see page 1-5-18).
Causes
Perform the drum surface refreshing operation.
Flawed drum. Replace the drum unit (see page 1-5-15).
Replace the drum unit (see page 1-5-15).
Replace the developer unit (see page 1-5-13).
Clean the heat roller and press roller.
Check procedures/corrective measures
Check procedures/corrective measures
Check procedures/corrective measures
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