Kyocera TASKalfa 6501i Service Manual page 575

(9) Uneven density horizontally.
Print example
Defective part
LSU
1
Charging roller
2
Developer unit
3
Transfer belt unit.
4
Fuser unit
5
1. Defective laser scanner unit.
2. Improper charging roller rotation
3. Improper contact on the developer unit terminals
Check description
Check the emission of laser is
even.
Check if the charing roller is
improperly mounted.
Check If the connecting termi-
nals of the developing bias is
contaminated by toner.
Check if the transfer belt is con-
taminated on its surface or dam-
aged.
Check if the cleaning bias con-
nector or the connecting termi-
nals of high voltage are dirty or
deformed.
Check that the roller, its driving
unit, or the fusing pressure
release mechanism is deformed,
abraded, or damaged.
Cause of trouble
Replace the LSU. (see page 1-5-49)
1. Fix the charging roller properly.
2. Replace the charging roller.
(Perform U930) (see page 1-5-59)
1. If the connecting terminals is dirty.
2. Replace the developer unit.
(Perform U140) (see page 1-5-56)
1. Replace the transfer belt unit.
1. If the connector or terminals are dirty,
clean.If the connecting terminals are
deformed, correct for a proper conduction.
2. Replace the high-voltage PWB.
If the roller, its driving unit, or the fusing pres-
sure release mechanism is deformed,
abraded, or damaged, replace the fuser unit.
1-4-215
Corrective Action
2N8/2N7