Olivetti d-Copia 1801MF Plus, Service Manual, Page: 249 / 492

2NC/2NF/2NG/2NN/3P7/3P8/3P9
1-4-77
(8) Uneven density longitudinally.
Print example Cause of trouble
1. Dirty LSU inside
2. The transfer roller is not pressed against the drum properly.
3. Drum condensation.
Defective part Check description Corrective Action
1
Transfer roller unit Check that the transfer roller unit
is properly fit. 1. If it is not fixed properly, fix it properly.
2. If the conveying unit has not been cloed,
check how the conveying guide is locked
and open the conveying guide once, then
close.
3. Replace the transfer roller unit.
(see page 1-5-44)
2
Drum unit 1. Check toner is evenly
layered on its surface.
2. Check whether the device
has been operated under a
highly humid environment.
1. Execute drum refreshing.
2. Install a cassette heater.
3. Replace the drum unit. (see page 1-5-40)
3
Developer unit Check that toner is evenly lay-
ered on the developer roller. Replace the developer unit.. (see page 1-5-35)
4
LSU The emission of laser dispersed
from the LSU is not even. (Mirror
is dropped off inside.) Replace the LSU. (see page 1-5-27)