Canon imagePRESS C800 Series Troubleshooting Manual page 153

Chapter 1
- Solid Density of each color and balance among each color. (Density is not extremely light.)
In the case of light density with a certain color, it may be caused by the developer of the color in question, or fault of primary transfer roller, laser scanning system
or high voltage system.
- White/Black line
If white or black lines occur with a particular color, the possible cause is an error in the Drum Unit of the color, an error in the Developing Assembly, or soiling on
the laser light path.
If white or black lines occur at the same position with all the colors, the possible cause is deterioration of the Intermediate Transfer Unit or Fixing Assembly.
- Density unevenness at the rear/front
If there is density unevenness with a certain color, it may be caused by fault of drum unit, laser scanning system or transfer (intermediate transfer/secondary transfer)
unit.
If there is density unevenness with all colors, it may be caused by deterioration of intermediate transfer unit.
c-5) 64-Gradation (TYPE > 12)
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