Scanner System: White Lines In Main Scan Direction, White Bands In Main - Konica Minolta bizhub C650 Service Manual

Field Service Ver. 8.0 Jun. 2008
18.3.2

Scanner system: white lines in main scan direction, white bands in main

scan direction, colored lines in main scan direction, and colored bands in
main scan direction
A. Typical faulty images
White lines in main
scan direction
4036fs4025c0
B. Troubleshooting procedure
Step Section
1 Original
2 ADF
Original glass
3
Machine → Scan
Area → Image
4 Position: Top
Edge
(Service Mode)
5
White bands in main
scan direction
4036fs4026c0
Check item
Original is damaged or dirty.
Original pad is dirty.
Original glass is dirty.
The adjustment value for [Image
Position: Leading Edge] falls within
the specified range.
The problem has been eliminated
through the checks of steps up to 4.
18. Image quality problem
Color lines in main
scan direction
4036fs4027c0
Result
YES Change original.
YES Clean.
Wipe the surface clean with a
YES
soft cloth.
Readjust.
NO
Change scanner assy.
NO
Change CCD unit.
Color bands in main
scan direction
4036fs4028c0
Action
695