Black Streaks Appear Longitudinally (Image Rendering Problem) - Kyocera TASKalfa 1800 Service Manual

(6) Black streaks appear longitudinally.
Print example
Defective part
Separation brush
1
Drum unit
2
Charging roller unit Check if there is no toner streaks
3
Transfer roller unit
4
Fuser unit
5
Eject guide
6
1. Dirty charging roller
2. Flawed or dirty drum unit
3. Damaged or paper dust bitten cleaning blade
Check description
Check if the separation brush is
dirty with paper dusts and waste
toner.
Check if drum is dirty on its sur-
face.
1. Check if the drum has
scratches.
2. Check whether the edge of
the cleaning blade is dam-
aged.
3. Check whether it is abraded
or paper dusts are accumu-
lated.
4. Check whether toner is
accumulated in the cleaning
section.
on the surface of the charging
roller.
1. Check if the transfer roller is
contaminated on its surface
or damaged.
2. Check the connecting termi-
nals of high voltage are not
dirty or deformed.
Check if the paper separation
puddle is contaminated with
toner.
Check the device is adjusted for
a correct paper weight that
matches the paper in use.
The Rib is contaminated with
toner.
Cause of trouble
If the separation brush is dirty, clean it using a
brush.
Execute drum refreshing.
(System Menu >Adjustment / Maintenance)
Replace the drum unit.
(see page 1-5-40)
If the charging roller has streaks on its surface,
clean the charging roller. Replace the charging
roller, if necessary.
If smears and scuff are observed on the trans-
fer roller unit, replace the unit.
(see page 1-5-44)
If the connector or terminals are dirty, clean.
If the connecting terminals are deformed, cor-
rect for a proper conduction.
Replace the high voltage PWB.
(see page 2-2-18)
If the paper separation puddle is dirty, clean the
paper separation puddle.
If the settings for paper weight and the paper
being used do not match, make a proper con-
figuration.
If it is duty,clean.
1-4-75
2NC/2NF/2NG/2NN/3P7/3P8/3P9
Corrective Action