Ir System: White Lines In Sub Scan Direction, White Bands In Sub Scan - Konica Minolta bizhub C250 Service Manual

Field Service Ver. 3.0 Aug. 2006
18.3 Solution
18.3.1

IR 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
4036fs4021c0
B. Troubleshooting Procedure
Step Section
1 Original
2 Original Cover
Original Glass
3
Shading sheet
4
Mirror, lens, Exposure
Lamp, and reflectors
5
Machine → Scan Area
→ Image Position:
6
Side Edge (Service
Mode)
7
White bands in Sub
Scan Direction
4036fs4022c0
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 lines in Sub Color bands in Sub
Scan Direction
4036fs4023c0
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 Scanner Assy.
Change CCD Unit.
Scan Direction
4036fs4024c0
Action
477