2WA/2NJ/2RK
(1) Isolate the place of image failure......................................................................................... 7-1
(2) Scanner Factors (when scanning from DP)......................................................................... 7-2
(2-1) Abnormal image ......................................................................................................... 7-4
(2-2) Colored background ................................................................................................... 7-6
(2-3) Black or color spots appear on the image .................................................................. 7-8
(2-4) Blurred characters ...................................................................................................... 7-9
(2-5) Original center and copy image center are mismatched .......................................... 7-11
(2-6) Horizontal black streaks ........................................................................................... 7-11
(2-7) Vertical black / color streaks or band ....................................................................... 7-13
(2-8) There is a regular difference between the image leading edges of the original
and copy................................................................................................................... 7-15
(2-9) Vertical white streaks or band .................................................................................. 7-16
(2-10) Moire ........................................................................................................................ 7-18
(2-11) Blank image or entirely black image......................................................................... 7-18
(2-12) Partly dark or light image.......................................................................................... 7-20
(2-13) Blurred image ........................................................................................................... 7-21
(2-14) Part of the image is not copied................................................................................. 7-22
(2-15) Color shift ................................................................................................................. 7-24
(2-16) Skewed image.......................................................................................................... 7-25
(2-17) The entire image is too light ..................................................................................... 7-26
(3) Scanner Factors (when scanning on the contact glass).................................................... 7-29
(3-1) Abnormal image ....................................................................................................... 7-31
(3-2) Colored background ................................................................................................. 7-32
(3-3) Black or color spots appear on the image ................................................................ 7-33
(3-4) Blurred characters / Color Shift ................................................................................ 7-34
(3-5) Original center and copy image center are mismatched .......................................... 7-34
(3-6) Horizontal black streaks ........................................................................................... 7-35
(3-7) Vertical black / color streaks or band ....................................................................... 7-36
(3-8) There is a regular difference between the image leading edges of the original
and copy................................................................................................................... 7-37
(3-9) Vertical white streaks or band .................................................................................. 7-38
(3-10) Moire ........................................................................................................................ 7-39
(3-11) Blank image or entirely black image......................................................................... 7-39
(3-12) Partly dark or light image.......................................................................................... 7-40
(3-13) Blurred image ........................................................................................................... 7-42
(3-14) Part of the image is not copied................................................................................. 7-43
(3-15) Skewed image.......................................................................................................... 7-44
(3-16) The entire image is too light ..................................................................................... 7-45
(4) Engine Factors (Paper conveying cause: Transfer, Fuser and Separation)...................... 7-47
(4-1) Colored background ................................................................................................. 7-50
(4-2) Black spots appear on the image ............................................................................. 7-50
(4-3) The image is not partly printed (blank or white spots) ............................................. 7-51
(4-4) Blank image.............................................................................................................. 7-51
(4-5) Original center and copy image center are mismatched .......................................... 7-52
(4-6) Paper creases .......................................................................................................... 7-52
(4-7) Dirty reverse side ..................................................................................................... 7-53
(4-8) The entire image is too light ..................................................................................... 7-53
(4-9) Horizontal streaks or band (white/black) .................................................................. 7-54
(4-10) The irregular misalignment occurs between the leading edges of the original
and copy image (Variation of paper leading edge timing) ........................................ 7-55
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