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Care and Maintenance
Trouble Possible Cause Corrective Action
Dark and wavy vertical
streaks appear in all
colours.
The main charge grid is
dirty.
Replace the imaging unit.
The entire page prints in
black, including the
borders.
Bad electrical contact for the
main charge grid.
Reinsert the imaging unit to
correct the contact for the
main charge grid.
The main charge grid is
broken.
Replace the imaging unit.
Toner spots appear on
the back of the media.
The transfer unit is worn out. Replace the transfer unit.
The page prints in black
in the image area only.
(The borders are clear.)
Either the image processor
board or engine control board
is not functioning properly.
Turn the printer off and back
on again. If the problem
persists, call for service on
your printer.