Kyocera TASKalfa 7002i Service Manual page 937

(5-15) Vertical white streaks or band
Step Check description
1 Checking the developer
unit
2 Checking the laser path
3 Checking the drum unit
and the developer unit
4 Setting the cassette heater The image forming section
5 Checking the main charger
unit
6 Cleaning the eraser
Assumed cause
Foreign objects are in the
developer unit.
There are foreign objects
on the laser path of the
LSU.
The drum surface is dirty
or has some scratches.
is affected by humidity.
The main charger roller
surface is dirty or has
some scratches.
The eraser is dirty.
7-77
Measures
Replace the developer unit
with faulty color.
Remove foreign objects on
the frame or sealing material
between the developer unit
and the drum unit.
Execute the drum refresh. If
not repaired, replace the
drum unit.
[Cassette heater standard
model]Connect the cassette
heater and set U327 if neces-
sary.[Cassette heater
optional model]Install the
cassette heater and set U327
if necessary.
Clean the main charger roller
surface. Replace the main
charger roller unit if the issue
is not resolved.
Clean the eraser.
2WA/2NJ/2RK
Reference
Detaching
and Reat-
taching the
developer
unit
Detaching
and Reat-
taching the
drum unit
Installing
the cas-
sette
heater
Detaching
and reat-
taching the
main char-
ger roller
unit