Scanner System: White Lines, White Bands, Colored Lines And Colored Bands In Main Scan Direction - Konica Minolta bizhub C25 Service Manual

22. IMAGE QUALITY PROBLEM
22.2.2 Scanner system: white lines, white bands, colored lines and colored bands
in main scan direction
A. Typical faulty images
White lines
B. Troubleshooting procedure
Step Section
1 Original
2 ADF
3 Original glass
4 SERVICE MODE
 ADJUST 
CIS MAIN REG-
IST or ADF MAIN
REGIST
5
346
White bands
Check item
Original is damaged or dirty.
Original pad is dirty.
Original glass is dirty.
The adjustment value for [CIS
MAIN REGIST] or [ADF MAIN
REGIST] falls within the specified
range.
The problem has been eliminated
through the checks of steps up to 4.
Field Service Ver. 1.1 May 2011
Color lines Color bands
Result Action
YES Change original.
YES Clean.
YES Wipe the surface clean with a
soft cloth.
NO Readjust.
NO Change scanner unit.
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