EN
Troubleshooting the Printing System
7-71
Table 7-30. Vertical Dots
Possible Cause Action
Dirty static eliminator
teeth.
Clean the static eliminator.
Poor contact between
the Static Eliminator
and the Engine
Controller Board.
Clean the contacts, if dirty. If the problem remains
after cleaning, or if parts are damaged or deformed,
replace them.
Deformed or
deteriorated Transfer
Roller.
Replace the Transfer Roller.
Defective DC
Controller Assembly.
Replace the DC Controller Assembly.
Table 7-31. Vertical White Lines
Possible Cause Action
Toner Cartridge is
nearly empty. This can
cause uneven toner
distribution.
Remove the Toner Cartridge and shake it gently. The
cartridge will soon require replacement.
Toner Cartridge has
been exposed to too
much light.
Store the Toner Cartridge in a darkened environment
for several days. This may restore the photosensitive
potential.
Foreign objects in
beam path. Any
foreign objects will
block the light from
developing an image
on the Photosensitive
drum.
Remove the Toner Cartridge and check for damage.
Replace the Toner Cartridge if it is damaged.
Remove the Printer Cover and inspect the path from
the Laser/Scanner to the Toner Cartridge drum,
looking for foreign objects in the beam path.
