White Streaks Are Printed Vertically - Kyocera ECOSYS M3040dn Service Manual

(5) White streaks are printed vertically.

Print example
1. Table scanning
Defective part
Original document
1
Contact glass
2
Mirror
3
Lamp unit
4
ISU
5
Shading plate
6
CCD PWB
7
Control PWB
8
2. DP-scanning
Defective part
Original document
1
Slit glass
2
Mirror
3
Lamp unit
4
Check description
Check whether the original
document is dirty.
Check whether the contact glass
is dirty.
Check whether the mirrors are
dirty.
Check that the lamp unit is con-
taminated with dusts.
Check whether the lens cover is
hanged off.
Check whether the shading plate
is dirty.
The CCD PWB is defective.
The control PWB is defective.
Check description
Check whether the original
document is dirty.
Check whether the slit glass is
dirty.
Check whether the mirrors are
dirty.
Check that the lamp unit is con-
taminated with dusts.
If the original document is dirty, replace.
If the contact glass is dirty, clean the contact
glass, and the bottom part of the shading plate.
If the mirrors are dirty, clean the three mirrors.
If dusts are observed on the lamp unit, remove
the dusts in the light paths.
Re-mount the lens cover if it is hanged off.
If the shading plate is dirty, perform
maintenance mode U063 to modify the
shading position. If it does not cure, replace the
contact glass assembly.
(see page 1-5-16)
Replace the ISU and perform U411.
(see page 1-3-54)
Replace the control PWB.(see page 2-2-12)
If the original document is dirty, replace.
If the slit glass is dirty, clean the slit glass, and
the bottom part of the shading plate.
If the mirrors are dirty, clean the three mirrors.
If dusts are observed on the lamp unit, remove
the dusts in the light paths.
1-4-52
2NM/2NX/2NY/2NZ/2P0/2P6
Corrective Action
Corrective Action