Olivetti d-Copia 6500MF Plus Service Manual page 542

(8) Uneven density longitudinally.
Print example
Defective part
Transfer belt unit
1
Drum unit
2
Developer unit
3
LSU
4
Service Manual
1. Dirty LSU inside
2. The transfer belt is not pressed against the drum properly.
3. Drum condensation.
Check description
Check that the transfer belt unit
is properly fit.
1. Check toner is evenly
layered on its surface.
2. Check whether the device
has been operated under a
highly humid environment.
Check that toner is evenly lay-
ered on the developing roller.
The emission of laser dispersed
from the LSU is not even. (Mirror
is dropped off inside.)
Cause of trouble
1. If it is not fixed properly, fix it properly.
2. If the conveying unit has not been closed,
check how the conveying guide is locked
and open the conveying guide once, then
close.
3. Replace the transfer belt unit.
(see page 1-5-65)
1. Execute drum refreshing.
2. Selects the Dew Mode by U148 Drum
Referesh Mode. (see page 1-3-88)
3. Install a cassette heater.
4. Replace the drum unit. (Perform U119)
(see page 1-5-57)
Replace the developer unit. (see page 1-5-56)
Replace the LSU.(Perform U119)
1-4-214
Corrective Action
2N8/2N7
Y116520-3