Epson AcuLaser M2000D, Service Manual

Page: 68 / 228

EPSON AcuLaser M2000D/M2000DN/M2010D/M2010DN Revision B
TROUBLESHOOTING Troubleshooting 59
Confidential
BLACK DOTS
Black dots appear on the printout.
HORIZONTAL LINE
A horizontal black line appears on the printout.
VERTICAL LINE
A vertical black line appears on the printout.
LIGHT OR FAINT IMAGE
The printed image is light or faint.
Sample Possible cause Checkpoint & Remedy
The photoconductor
unit or the developing
unit is faulty.
„
If the black dots appear at intervals of 94mm,
the photoconductor drum in the
photoconductor unit may be damaged. Replace
the photoconductor unit.
(See P. 82)
„
If the black dots appear at random intervals,
toner may be leaking from the developing unit
or the photoconductor unit. Replace the
photoconductor unit or the developing unit.
(See P. 82)
Sample Possible cause Checkpoint & Remedy
The photoconductor unit
is not properly grounded. Check if the drum shaft of the photoconductor
unit and the grounding tab on the printer properly
contact with each other. Apply a small amount of
conductive grease to the grounding tab as
necessary.
The photoconductor unit
is faulty. Replace the photoconductor unit. (See P. 82)
ABC
123
ABC
123
Sample Possible cause Checkpoint & Remedy
The charging wire has
acquired oxide on its
surface. Remove the photoconductor unit. Slide the green
charger cleaner tab (located at upper side of the
photoconductor unit) from side to side several
times. When finished, put the tab back into place.
(See P. 152)
The photoconductor unit
is faulty. If toner bands are observed on the photoconductor
drum after printing, the cleaner blade in the
photoconductor unit is not properly functioning.
Replace the photoconductor unit.
(See P. 82)
The developing roller in
the developing unit is
faulty. Replace the developing unit. (See P. 82)
Sample Possible cause Checkpoint & Remedy
The paper is inadequate
or faulty. Damp paper or paper with rough surface can cause
the problem. Replace the paper with new one.
Mounting failure of the
transfer roller. Check if both ends of the transfer roller are
properly inserted into the bearings. Clean the
bearings if they are contaminated with oil or paper
dust. Replace the transfer roller if necessary.
(See
P. 82)
Transfer bias is not
normal. Replace the HVPS (See P. 75) or the Main Board
Assy. (See P. 92)
ABC
123