Uneven Density Due To Toner-Coating Failure Of Sleeve - Canon imagePRESS C7000VP Series Trouble Shooting Information

3.7 Uneven density due to toner-coating failure of sleeve

 Description
There is an inspection case where an original with a low image ratio was printed in high volume,
uneven density occurred in the sub scanning direction at high-density areas of output images.
In this case, A4R-size originals were used.
 Cause
Printing an original with a low image ratio caused a downturn in consumption of toner inside the
developing assembly, causing toner clump [C] between the developing sleeve [D] and the blade
[B]. This caused uneven toner coating on the sleeve.
 Field Remedy
For the latest information, refer to 3.21 Starter overflow.
Trouble Shooting Information for C7000VP series
Rev. 2.0
Page 69
2010/09/17