Confidential
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3.4 Dirt on Paper
User Check
- Check if the paper is loaded into the paper tray correctly.
- Turn over the stack of paper in the paper tray, or try rotating the paper 180° in the paper tray.
Step Cause
Check Result Remedy
Is there dirt around the
entrance of the fuser unit?
Yes Clean the entrance of the
fuser unit.
1 Fuser unit dirty
Is the pressure roller
ASSY dirty?
Yes Clean the pressure roller
ASSY.
2 Dirt on belt unit
electrode
Is the electrode of the belt
unit dirty?
Yes Clean the electrode of the
belt unit.
3 Dirt on waste
toner box
electrode
Is the electrode of the
waste toner box dirty?
Yes Clean the electrode of the
waste toner box.
4 Belt unit dirty Does dirt on the paper
disappear after replacing
the belt unit with a new
one?
Yes Replace the belt unit.
5 Toner leak from
the waste toner
box
Is the waste toner box full
of toner?
Yes Replace the waste toner
near/full sensor ASSY.
Or, replace the main PCB
ASSY.
3.5 Wrinkles
User Check
- Check if the paper is loaded into the paper tray correctly.
- Turn over the stack of paper in the paper tray, or try rotating the paper 180° in the paper tray.
Step Cause
Check Result Remedy
1 Fuser unit failure Do wrinkles on the paper
disappear after replacing
the fuser unit with a new
one?
Yes Replace the fuser unit.
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