A Black Line Appears Longitudinally; A Black Line Appears Laterally; One Side Of The Copy Image Is Darker Than The Other - Kyocera TASKalfa 620 Service Manual

2KN/2KP

(6) A black line appears longitudinally.

Copy example
Dirty or flawed drum.
Deformed or worn cleaning blade.
Dirty contact glass.
Dirty scanner mirror.
Dirty upper and lower slit glass.
Dirty main charger wire.
Dirty or flawed press roller.

(7) A black line appears laterally.

Copy example
Flawed drum.
Dirty developing section.
Leaking main charger housing.
Contact fail-
ure of
developing
bias termi-
nal.

(8) One side of the copy image is darker than the other.

Copy example
Dirty main charger wire.
Defective exposure lamp.
Defective CIS.
1-4-54
Causes
Causes
Poor installation of high
voltage PWB.
Causes
Check procedures/corrective measures
Clean the drum. If the drum is flawed, replace the drum
(see page 1-5-44).
Replace the cleaning blade.
Clean the contact glass.
Clean the scanner mirror.
Clean the upper and lower slit glass.
Clean the main charger wire or, if it is extremely dirty,
replace it.
Clean the press roller.
Check procedures/corrective measures
Replace the drum (see page 1-5-44).
Clean any part contaminated with toner in the developing
section.
Clean the main charger wire and grid.
Check the installation state of the high voltage PWB.
Check procedures/corrective measures
Clean the wire or, if it is extremely dirty, replace it (see page
1-5-27).
Check if the exposure lamp light is distributed evenly. If not,
replace the exposure lamp (see page 1-5-28).
Check if the CIS light is distributed evenly.
If not, replace the CIS (see page 1-5-79).