Olivetti d-Copia 1801MF Plus, Service Manual, Page: 252 / 492

2NC/2NF/2NG/2NN/3P7/3P8/3P9
1-4-80
(11) Offset occurs.
Print example Cause of trouble
1. Flawed or dirty drum unit
2. Developing bias leakage.
Defective part Check description Corrective Action
1
Paper
Check that the type of the paper
used falls within the range of
specifications. Check the set-
tings of the type and weight of
the paper.
1. If the type of the paper being used falls
outside the requirements, replace and use
a suitable type of paper.
2. If the settings made for the paper being
used is inadequate, configure the settings
according to the paper being used.
2
Drum unit Check the print image on paper
has a problem at an interval
equivalent to the circumference
of the drum (94 mm). If the print image on paper has a problem at an
interval equivalent to the circumference of the
drum, replace the drum unit. (see page 1-5-40
3
Developer unit
Check if offsets are observed at
an constant interval of 63 mm,
which is equivalent to the cir-
cumference of the developing
roller.
If offsets are observed at an constant interval
of 39 mm, which is equivalent to the
circumference of the developing roller, replace
the developer unit.
(Waste toner is not properly sweeped from the
developing roller.)
(see page 1-5-35)
4
Transfer roller unit Check if offsets are occurred at a
pitch of the outer circumference
of the transfer roller. (50 mm)
If an offset happens at a pitch of the outer cir-
cumference, clean the transfer roller.
5
Fuser unit Check the print image on paper
has a problem at an interval
equivalent to the circumference
of the fuser roller.
If the fuser unit roller is dirty, replace the unit.
6
Fusing
temperature set-
ting Check the fusing temperature
value by U161.
(see page 1-3-55) If the fusing temperature value by U161 is not
its default, reset it to the default.