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(6) Black streaks are printed vertically.
Print example
Dirty contact glass.
Dirty slit glass.
Dirty or flawed drum.
Deformed or worn cleaning
blade in the drum unit.
Defective transfer belt.
Defective transfer roller.
Dirty scanner mirror.
(7) Streaks are printed horizontally.
Print example
Dirty or flawed drum.
Dirty developer section.
Poor contact of grounding ter-
minal of drum unit.
(8) One side of the print image is darker than the other.
Print example
Defective exposure lamp.
Service Manual
Causes
Clean the contact glass.
Clean the slit glass.
Perform the drum refresh operation.
Flawed drum. Replace the drum unit (see page 1-5-15).
Replace the drum unit (see page 1-5-15).
Replace the intermediate transfer unit (see page 1-5-16).
Replace the transfer roller unit(see page 1-5-16).
Clean the scanner mirror.
Causes
Perform the drum refresh 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).
Causes
Replace the LED PWB (see page 1-5-28).
Check procedures/corrective measures
Check procedures/corrective measures
Check procedures/corrective measures
1-4-78
2NP
Y116141-8
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