Kyocera TASKalfa 6501i Service Manual page 571

(5) White streaks are printed vertically.
Print example
Defective part
Developer unit
1
Light path between
the LSU and the
2
drum
Drum unit
3
LSU
4
Transfer belt unit
5
1. Dirty LSU slit glass.
2. Foreign objects inside the developer unit.
3. Internal contamination
4. Dirty drum inside.
Check description
Executing U089 to generate
PGs. (see page 1-3-64)
Check if there are dusts, dirt, or
toner obstructing the light paths.
Check if the charging roller is
dirty.
Check if the discharging lamp is
dirty.
Check if the LSU slit glass is
dirty.
Check whether a white streak
occurs at the same position as
the smear on the transfer belt.
Cause of trouble
Replace the developer unit.
(see page 1-5-56)
If a foreign object exists on the frame or the
sealings between the developer unit and the
drum unit, remove.
If the charging roller is dirty,clean. Or replace it.
(Perform U930) (see page 1-5-59)
If the discharging lamp is dirty,clean.
If the LSU slit glass is dirty,
perform laser scanner cleaning.
Clean the transfer belt if it is dirty.
Replace the transfer belt unit. (see page 1-5-
65)
1-4-211
Corrective Action
2N8/2N7