Konica Minolta bizhub C200 Service Manual page 416

Field Service Ver. 2.0 Dec. 2008
19.3 Solution
NOTE
• Typical faulty image samples shown in the following are all printed with A4S set-
ting.
19.3.1 Scanner system: white lines, white bands, colored lines 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 Original cover
Original glass
3
Shading sheet
4
Mirror, lens,
exposure lamp, and
5 reflectors
Machine Adjustment
→ Scan Area → Feed
6
adjustment
(Service Mode)
7
White bands in sub Color lines in sub scan
scan direction 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 [Feed]
falls within the specified range.
The white lines/bands or colored
lines/bands are blurry.
19. 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 exposure unit.
375