Kyocera TASKalfa 5551ci - Mono-Color Image: Longitudinal Uneven Density

2L6/2N6/2N5/2N4
1-4-267
(8) Uneven density longitudinally.
Print example Cause of trouble
1. Dirty LSU inside
2. The transfer belt is not pressed against the drum properly.
3. Drum condensation.
Defective part Check description Corrective Action
1
LSU The emission of laser dispersed
from the LSU is not even. (Mirror
is dropped off inside.)
Replace the LSU.(Perform U119)
2
Primary transfer
roller (intermediate
transfer belt)
Check the position at which the
primary transfer roller axles are
mounted.
1. If the axle holder is hanged off of the
mounting position,
1. fix the axle holder properly.
2. Replace the intermediate transfer belt unit.
(see page 1-5-62)
3
Drum unit 1. Check if toner is evenly
layered on the durm surface.
2. Check whether the device
has been operated under a
highly humid environment.
1. Execute drum refreshing.
2. Execute U148 Drum refresh-Dew. (see
page 1-3-106)
3. Install a cassette heater.
4. Replace the drum unit. (Perform U119)
(see page 1-5-57)
4
Developer unit Check that toner is evenly lay-
ered on the developing roller.
Replace the developer unit. (see page 1-5-57)