Unsharpness; Gray Background; Dirt On The Top Edge Or Back Of The Paper - Kyocera FS-1030MPF Service Manual

(7) Unsharpness.

Print example
Defective paper specifications.
Defective transfer roller installa-
tion.
Defective transfer bias output.
EcoPrint mode setting.

(8) Gray background.

Print example
Print density setting.
ABC
123
Defective potential on the drum
surface.
Defective main charger grid.
Defective developer roller
(developer unit).

(9) Dirt on the top edge or back of the paper.

Print example
Toner contamination in various
ABC
parts.
123
Defective transfer roller.
Causes
Causes
Causes
1-4-17
Check procedures/corrective measures
Replace paper with the one that satisfies the paper
specification.
The transfer roller must be supported by the bushes at
the both ends. Clean the bush to remove oil and debris.
Replace the transfer roller if necessary (See page 1-5-
30).
Replace the high voltage PWB or control PWB (See
page 1-5-43 or 1-5-37).
The EcoPrint mode can provides faint, unsharp printing
because it acts to conserve toner for draft printing pur-
pose. For normal printing, turn the EcoPrint mode off by
using the operator panel. For details, refer to the opera-
tion guide.
Check procedures/corrective measures
The print density may be set too high. Try adjusting the
print density. For details, refer to the operation guide.
Replace the drum unit (See page 1-5-28).
Clean the main charger grid (See page 1-5-29).
If a developer unit which is known to work normally is
available for check, replace the current developer unit in
the machine with the normal one. If the symptom disap-
pears, replace the developer unit with a new one (See
page 1-5-27).
Check procedures/corrective measures
Dirty edges and back of the paper can be caused by
toner accumulated on such parts as the paper chute
guide, paper conveying paths, the bottom of the drum
and developer unit, and the fuser unit inlet. Clean these
areas and parts to remove toner.
If the transfer roller is contaminated with toner, clean the
transfer roller using a vacuum cleaner or by continu-
ously printing a low density page until the symptom has
faded away.
2MH/2MJ/2MK/2ML