Unsharp Printing - Mita DP-2800 Service Manual

5A2

Unsharp printing

Check contamination on
the main charger wire and
the grid.
Check paper for property.
Check the paper chute
installation.
Try changing the transfer bias
potential ( Normal or Thick).
Check the transfer roller
installation.
Check the transfer bias
potential.
Check EcoPrint setting.
Refresh drum.
6-36
• Clean the main charger wire by pulling the green color
main charger wire cleaner know in and out several
times.
• Paper with rugged surface or dump tends to cause this
type of failure.
• The paper chute (the metallic fixture provided between
the transfer roller and the fuser unit for antistatic
purpose) must not be fit loose. Press the paper chute
down firmly if necessary.
• Use the MODE SELECT key on the printer's control
panel. For details, refer to the instruction handbook
accompanying the printer.
• The transfer roller must be supported by the axle holder
at the both ends. Clean the axle holder to remove oil
and debris. Replace the transfer roller if necessary.
• Check contamination on the main charger wire and the
grid.
• The EcoPrint mode can provides faint, unsharp printing
because it acts to conserve toner for draft printing
purpose. For normal printing, turn the EcoPrint mode
off by using the MODE SELECT key on the printer's
control panel.
• Try cleaning the drum surface using the printer's built-
in cleaning system specifically provided for this purpose.
For details, refer to page 6-40.