Kyocera FS-9120DN Service Manual page 101

(6) A black line appears
longitudinally.
Causes
1. Dirty or flawed drum.
2. Deformed or worn cleaning blade.
3. Dirty main charger wire.
(7) A black line appears
laterally.
Causes
1. Flawed drum.
2. Dirty developing section.
3. Leaking main charger housing.
4. Leaking separation electrode.
(8) One side of the print
image is darker than
the other.
Causes
1. Dirty main charger wire.
Causes
1. Dirty or flawed drum.
2. Deformed or worn cleaning blade.
3. Dirty main charger wire.
Perform the drum refresh operation. If the drum is flawed, replace
the drum unit.
Replace the drum unit (see page 1-6-14).
Clean the main charger wire or, if it is extremely dirty, replace it.
Causes
1. Flawed drum.
2. Dirty developing section.
3. Leaking main charger housing.
4. Leaking separation electrode.
Replace the drum unit.
Clean any part contaminated with toner in the developing section.
Clean the main charger wire, grid and shield.
Clean the separation electrode.
Causes
1. Dirty main charger wire.
Clean the wire or, if it is extremely dirty, replace it.
Check procedures/corrective measures
Check procedures/corrective measures
Check procedures/corrective measures
FS-9120DN/9520DN
1-5-31