Konica Minolta bizhub C650 Service Manual page 50

Field Service Ver. 8.0 Jun. 2008
17.5.2 Finisher ..................................................................................................... 686
18. Image quality problem ......................................................................................... 687
18.1 How to read element date................................................................................. 687
18.1.1 Table number ............................................................................................ 688
18.1.2 Level history 1 ........................................................................................... 689
18.1.3 Level history 2 ........................................................................................... 690
18.2 How to identify problematic part ....................................................................... 691
18.2.1 Initial check items...................................................................................... 691
18.3 Solution............................................................................................................. 693
18.3.1 Scanner 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 .................................................................................................... 693
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 ................................................................................... 695
18.3.3 Scanner system: color spots ..................................................................... 696
18.3.4 Scanner system: fog ................................................................................. 697
18.3.5 Scanner system: blurred image, blotchy image ........................................ 698
18.3.6 Scanner system: incorrect color image registration, sync shift (lines in main
scan direction)........................................................................................... 699
18.3.7 Scanner system: moire ............................................................................. 700
18.3.8 Scanner system: skewed image ............................................................... 701
18.3.9 Scanner system: distorted image.............................................................. 702
18.3.10 Scanner system: low image density, rough image .................................... 703
18.3.11 Scanner system: defective ACS................................................................ 704
18.3.12 Scanner system: blank copy, black copy ................................................... 705
18.3.13 Scanner system: abnormal image ............................................................ 706
18.3.14 Scanner system: uneven density .............................................................. 707
18.3.15 Printer monocolor: white lines in sub scan direction, white bands in sub scan
direction, colored lines colored bands in sub scan direction ..................... 708
18.3.16 Printer monocolor: white lines in main scan direction, white bands in main
scan direction, colored lines in main scan direction, colored bands in main
scan direction............................................................................................ 709
18.3.17 Printer monocolor: uneven density in sub scan direction.......................... 710
18.3.18 Printer monocolor: uneven density in main scan direction........................ 711
18.3.19 Printer monocolor: low image density ....................................................... 712
18.3.20 Printer monocolor: gradation reproduction failure ..................................... 714
18.3.21 Printer monocolor: foggy background ....................................................... 715
18.3.22 Printer monocolor: void areas, white spots ............................................... 717
18.3.23 Printer monocolor: colored spots .............................................................. 718
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