Utax CA-3100, Service Manual

Page: 192 / 287

7-14
Troubleshooting
＞
Image formation problems
[CONFIDENTIAL]
(1-11)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 specifi-
cations. Check the settings 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
(94.2 mm). If the print image on paper has a problem at an
interval equivalent to the circumference of the drum,
replace the drum unit.
3
Developer unit
Check if offsets are observed at an
constant interval of 44.9 mm, which
is equivalent to the circumference of
the developing roller.
If offsets are observed at an constant interval of
44.9 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.)
4
Transfer roller unit Check if offsets are occurred at a
pitch of the outer circumference of
the transfer roller. (58mm)
If an offset happens at a pitch of the outer circum-
ference, 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.
Check the fuser temperature
Change fixing temperature with service setting
(System Menu > Adjustment/Maintenance > Ser-
vice setting).Chenge the setting value to 2.