S
OLVING
P
ROBLEMS
5.12
Vertical lines
If black vertical streaks appear on the page:
• The drum inside the toner cartridge has probably been
scratched. Install a new toner cartridge.
If white vertical streaks appear on the page:
• The surface of the LSU part inside the machine may be
dirty. Clean the LSU. See “Cleaning the Inside” on
page 4.6. Contact your service representative.
Gray background
If the amount of background shading becomes
unacceptable, the procedures below may fix the problem.
• Change to a lighter weight pages. See “Paper
Specifications” on page 6.3.
• Check the printer’s environment; very dry (low humidity)
or high humidity (higher than 80% RH) conditions can
increase the amount of background shading.
• Remove the old toner cartridge and install a new one. See
“Installing the Toner Cartridge” on page 2.4.
Toner smear
• Clean the inside of the printer. See “Cleaning the Inside”
on page 4.6.
• Check the paper type and quality. See “Paper
Specifications” on page 6.3.
• Remove the toner cartridge and install a new one. See
“Installing the Toner Cartridge” on page 2.4.
Vertical repetitive
defects
If marks repeatedly appear on the printed side of the page
at even intervals:
• The toner cartridge may be damaged. Clean the inside of
the printer. See “Cleaning the Inside” on page 4.6. After
cleaning the inside of the printer, if you still have the
same problems, install a new toner cartridge. See
“Installing the Toner Cartridge” on page 2.4.
• Parts of the printer may have toner on them. If the defects
occur on the back of the page, the problem will likely
correct itself after a few more pages.
• The fusing assembly may be damaged. Contact a service
representative.
Problem Solution
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