Canon imagePRESS C800 Series Troubleshooting Manual page 11

Contents
1.1 Troubleshooting ............................................................................................................................................................. 1-1
1.1.1 Image Faults ................................................................................................................................................................................. 1-1
1.1.1.1 Light Image / Weak Density ...........................................................................................................................................................................1-1
1.1.1.1.1 Differences between the image on the original and the print occur / Density adjustment .....................................................................1-1
1.1.1.2 Foggy Image ...................................................................................................................................................................................................1-1
1.1.1.2.1 Foggy images ..........................................................................................................................................................................................1-1
1.1.1.3 Uneven Density...............................................................................................................................................................................................1-4
1.1.1.3.1 Uneven image gloss ................................................................................................................................................................................1-4
1.1.1.3.2 Slightly uneven densities that occur in the halftone density area of a printed image .............................................................................1-5
1.1.1.3.3 Gradation/density/light hue/solid color issue on copy and print and gradation adjustment ...................................................................1-6
1.1.1.3.4 Uneven density due to the areas on ITB where paper passes and does not passes .................................................................................1-9
1.1.1.3.5 Uneven gloss (Rain drop mark) in high density area............................................................................................................................ 1-11
1.1.1.3.6 Coarse image from the leading edge to about 100mm from the trailing edge of paper........................................................................ 1-13
1.1.1.4 Image Displacement/Out of Focus................................................................................................................................................................ 1-16
1.1.1.4.1 How to correct color displacement that occurs in the output................................................................................................................ 1-16
1.1.1.5 Partially Blank/Streaked ............................................................................................................................................................................... 1-16
1.1.1.5.1 White gap occurring on dark color immediately after halftone ............................................................................................................ 1-16
1.1.1.5.2 Roller marks.......................................................................................................................................................................................... 1-20
1.1.1.5.3 White spots by drum pitch due to soiling fused on drum in specific environment (H/H) .................................................................... 1-22
1.1.1.6 Smudged/Streaked ........................................................................................................................................................................................ 1-25
1.1.1.6.1 Unable to read originals/Streak-like soiling of image when picking up by feeder (Duplex Color Image Reader Unit-H1)................ 1-25
1.1.1.6.2 Soiled originals occur with streak-like soiling when picking up by feeder (Duplex Color Image Reader Unit-H1)........................... 1-25
1.1.1.6.3 Soiled originals occur when picking up by feeder (Duplex Color Image Reader Unit-H1)................................................................. 1-28
1.1.1.6.4 Streak-like soiling/blank on images...................................................................................................................................................... 1-28
1.1.1.6.5 Luster streak/uneven gloss in vertical scanning direction .................................................................................................................... 1-29
1.1.1.6.6 Vertical line on image ........................................................................................................................................................................... 1-29
1.1.1.6.7 Image failure due to lines on Fixing Belt (luster streaks/patches of uneven gloss)/How to refresh Fixing Belt.................................. 1-30
1.1.1.6.8 Scratches on image due to soiled decurler unit guides ......................................................................................................................... 1-30
1.1.1.6.9 Dents on an image at 25mm intervals due to soiled decurler rollers of decurler unit .......................................................................... 1-32
1.1.1.6.10 20mm or less length of streak on image (development stain) due to the toner clump on the developing sleeve............................... 1-33
1.1.1.6.11 Soiling (dot soiling) on halftone images at installation ...................................................................................................................... 1-34
1.1.1.6.12 Stain along the edge of the front/rear sides of 13x19 paper................................................................................................................ 1-37
1.1.1.6.13 Color displacement/scratches on image with 173mm intervals due to move of the host machine after installation ......................... 1-40
1.1.1.6.14 Stain on image 264mm behind high-density image due to intensive use of B/W mode .................................................................... 1-41
1.1.1.7 Poor Finxing.................................................................................................................................................................................................. 1-43
1.1.1.7.1 Fixing failure due to low temperature environment.............................................................................................................................. 1-43
1.1.1.8 Stretching/Shrinking ..................................................................................................................................................................................... 1-43
1.1.1.8.1 Difference in size occur between the size of original image and the size of copied image/How to adjust magnification fine adjustment
1-43
1.1.2 Faulty Feeding............................................................................................................................................................................ 1-43
1.1.2.1 Wrinkle.......................................................................................................................................................................................................... 1-43
1.1.2.1.1 Wrinkles due to thin paper used in a low humidity environment ......................................................................................................... 1-43
1.1.3 Malfunction ................................................................................................................................................................................ 1-44
1.1.3.1 No Power....................................................................................................................................................................................................... 1-44
1.1.3.1.1 Main power does not turn on even the main power switch is turned ON............................................................................................. 1-44
1.1.3.1.2 No display appears on LCD due to disconnection of connectors ......................................................................................................... 1-44
1.1.3.2 Malfunction/Faulty Detection ....................................................................................................................................................................... 1-45
1.1.3.2.1 "Place the originals again" is displayed due to disconnection of the connector (Multi-color image reader-H1) ................................. 1-45
1.1.3.2.2 "The alignment function of the finisher needs to be checked." message is displayed due to disconnection of connectors (Finisher-AM1/
Saddle Finisher-AM2)..................................................................................................................................................................................... 1-46
1.1.3.3 User Warning Message ................................................................................................................................................................................. 1-50
Contents