Fading In Patches; Longitudinal Black Stripes; Faint Shading On Unprinted Sections; Blurred Letter Edges - Oki C7100 User Manual

Fading in patches

Possible cause
The paper is moist.

Longitudinal black stripes

Possible cause
Image drum is damaged.
Toner is low.
Periodic black lateral
lines or spots.
The image drum has been
exposed to light.

Faint shading on unprinted sections

Possible cause
Paper has been affected
by static electricity.
Paper is too thick.
Toner is low.

Blurred letter edges

Possible cause
LED is dirty.
Cannot print desired
colour because toner is
low.
Black formation method
does not match
application.
Remedy
Store paper within specified temperature and humidity
levels.
Remedy
Replace image drum.
Change toner cartridge.
If the lines or spots occur at intervals of approximately 44 -
94 mm, the image drum (green tube) is damaged or dirty. If
damaged, replace the image drum cartridge. If dirty, wipe
the image drum gently with soft tissue. If this does not
work, replace the image drum.
If the lines or spots occur at intervals of approximately 113
mm, the fuser roller is damaged. Change the fuser unit.
Remove the image drum from the printer and store it in a
dark place for several hours. If this does not work, replace
the image drum.
Remedy
Store paper within specified temperature and humidity
levels.
Use recommended paper.
Change toner cartridge.
Remedy
Clean LED with lens cleaner or soft tissue.
Replace toner cartridge.
Open the printer driver and set black formation to CMYK.
TROUBLESHOOTING > 190