Kyocera TASKalfa 7002i Service Manual page 930

(5-7) Horizontal uneven density
Step Check description
1 Checking the main charger
unit
2 Main charger roller unit
replacement
3 Checking the developer
unit
4 Developer unit replace-
ment
5 Checking the developer
bias contact
6 Checking the developer
unit
7 Executing Drum refresh
8 Setting the cassette heater The image forming section
9 Drum unit replacement
10 LSU replacement
Assumed cause
The main charge roller
rotates irregularly.
The charger cleaning roller
is deformed.
The DS pulleys are dirty.
The DS pulleys are faulty.
The conduction is not sta-
bilized due to the dirty
developer bias contact.
The developer powder in
the developer unit is deteri-
orated.
Toner smudges in the
shape of a streak are on
both ends of the drum sur-
face.
is affected by humidity.
The drum surface is worn
down.
The laser emission is
uneven.
7-70
Measures
Reattach the main charger
roller unit.
Replace the main charger
roller unit.
Clean the DS pulleys at both
ends of the developer unit.
Replace the developer unit.
Clean the developer bias
contact.
Execute the developer
refresh. If not repaired,
replace the developer unit.
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.
Replace the LSU.
2WA/2NJ/2RK
Reference
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
Installing
the cas-
sette
heater
Detaching
and Reat-
taching the
drum unit
Detaching
and Reat-
taching the
LSU