18.3 Solution; Scanner System: White Lines In Sub Scan Direction, White Bands In Sub Scan Direction, Colored Lines In Sub Scan Direction, And Colored Bands In Sub Scan Direction - Konica Minolta bizhub C353 Service Manual

Field Service Ver. 4.0 Jun. 2008

18.3 Solution

NOTE
• Typical faulty image samples shown in the following are all printed with A4S set-
ting.
18.3.1 Scanner system: white lines in sub scan direction, white bands in sub
scan direction, colored lines in sub scan direction, and colored bands in
sub scan direction
A. Typical faulty images
White lines in sub
scan direction
B. Troubleshooting procedure
(1) When the original glass is used
Step Section
1 Original
2 ADF
Original glass
3
Shading sheet
4
Mirror, lens,
exposure Lamp, and
5 reflectors
Machine → Scan
Area → Image Posi-
6
tion: Side Edge
(Service Mode)
7
White bands in sub Color lines in sub
scan direction scan direction
Check item
Original is damaged or dirty.
Original pad is dirty.
Original glass is dirty.
Shading sheet is dirty.
Mirror is dirty
Lens is dirty
Exposure lamp is dirty
Reflectors are dirty
The adjustment value for [Image
Position: Side Edge] falls within
the specified range.
The white lines/bands or colored
lines/bands are blurry.
18. Image quality problem
Color bands in sub
scan direction
A02EF4C507DA
Result Action
YES Change original.
YES Clean.
YES Wipe the surface clean with
a soft cloth.
YES Wipe the surface clean with
a soft cloth.
YES Clean.
YES Clean.
YES Clean.
YES Clean.
NO Readjust.
YES Change scanner assy.
Change CCD unit.
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