Image Quality Problems; Bands Or Smudges That Appear At Regular Intervals; Completely Blank - Epson AcuLaser M2000D Service Manual

EPSON AcuLaser M2000D/M2000DN/M2010D/M2010DN

3.4.4 Image Quality Problems

BANDS OR SMUDGES THAT APPEAR AT REGULAR INTERVALS

Horizontal bands or smudges appear at regular intervals due to a problem of some
roller(s).
Measure the interval and check if the measured value match with any of the values
shown below. If it does, replace the appropriate part or unit.
Rollers
Upper registration roller Upper registration roller
Lower registration roller Lower registration roller
Transfer roller Transfer roller
Developing roller Developing unit
Heat roller Fuser unit
Pressure roller Fuser unit
Photoconductor drum Photoconductor unit
Heat roller Photoconductor drum
Pressure roller Transfer roller
TROUBLESHOOTING
Part/Unit to be Replaced Interval
25 mm
38 mm
45 mm
63 mm
73 mm
79 mm
94 mm
Developing roller Upper registration roller
Lower registration roller

COMPLETELY BLANK

Completely blank pages are printed.
Sample Possible cause
The photoconductor unit or
the developing unit is
faulty.
Transfer bias or developing
bias is not normal.
Poor connection
between the developing
bias terminal (spring)
and the high voltage
output terminal B
(J401,J402,J403) on the
HVPS.
Poor connection
between the bias
terminal (spring) and the
transfer bias output
terminal T
(J201,J202,J203) on the
HVPS.
The laser scanner unit is
faulty.
The Main Board Assy. is
faulty.
Troubleshooting
Revision B
Checkpoint & Remedy
Open the top cover and check if the
photoconductor unit or the developing unit
is properly installed.
Check if there is something wrong with
terminals between the charging unit and
the photoconductor unit.
Replace the HVPS.
Check if the HVPS is installed at the correct
position. If not, correct the position.
Replace the laser scanner unit. (See P. 119)
Replace the Main Board Assy. (See P. 92)
Confidential
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