Konica Minolta bizhub C360 Service Manual page 759

23. IMAGE QUALITY PROBLEM
23.3 Solution
NOTE
• Typical faulty image samples shown in the following are all printed with A3 setting.
23.3.1 Scanner system: white lines, white bands, colored lines and colored bands
in sub scan direction
A. Typical faulty images
White lines
B. Troubleshooting procedure
(1) When the original glass is used
Step Section
1 Original
2 ADF
3 Original glass
4 Shading sheet
5 Mirror, lens,
exposure Lamp, and
reflectors
Machine → Scan
6
Area → Image
2.1
Position: Centering
(Service Mode)
7
704
2.1
White bands
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: Centering] falls within
the specified range.
The white lines/bands or colored
lines/bands are blurry.
Field Service Ver. 2.1 Feb. 2012
Color lines Color bands
Result
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 exposure unit.
Change CCD unit.
A02EF4C507DA
Action