ES 1220n Troubleshooting • 187
Longitudinal black stripes
Faint shading on unprinted sections
Possible cause Remedy
Image drum is
damaged.
Replace image drum (see “Image Drum
Replacement” on page 133).
Toner is low. Change toner cartridge (see “Toner Cartridge
Replacement” on page 126).
Periodic black lateral
lines or spots.
• If the lines or spots occur at intervals of
approximately 44 - 94 mm, the green surface of
the image drum is damaged or dirty. If damaged,
replace the image drum cartridge (see “Image
Drum Replacement” on page 133). 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 (see “Fuser
Replacement” on page 147).
The image drum has
been exposed to
light.
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 (see “Image Drum
Replacement” on page 133).
Possible cause Remedy
Paper has been
affected by static
electricity.
Store paper within specified temperature and
humidity levels (see “Specifications” on
page 191).
Paper is too thick. Use recommended paper (see “Media
Recommendations” on page 11).
Toner is low. Replace toner cartridge (see “Toner Cartridge
Replacement” on page 126).