Kyocera TASKalfa 7002i Service Manual page 935

(5-13) Vertical black streaks or band
Step Check description
1 Executing Drum refresh
2 Setting the cassette heater The image forming section
3 Drum unit replacement
4 Checking the main charger
unit
5 Main charger roller unit
replacement
6 Checking the developer
unit
Assumed cause
The drum surface is dirty.
is affected by humidity.
The drum surface is worn
down.
The main charge roller sur-
face is dirty in the shape of
a streak.
The main charge roller sur-
face is deteriorated in the
streak shape.
Foreign objects are on the
developer roller surface.
7-75
Measures
Execute Drum refresh.
[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.
Replace the drum unit.
Clean the main charge roller
surface.
Replace the main charger
roller unit.
Clean the developer roller.
Or, replace the developer unit
if not repaired after cleaning.
2WA/2NJ/2RK
Reference
Installing
the cas-
sette
heater
Detaching
and Reat-
taching the
drum unit
Detaching
and reat-
taching the
main char-
ger roller
unit
Detaching
and reat-
taching the
main char-
ger roller
unit
Detaching
and Reat-
taching the
developer
unit