Print out this category
Solid black (TYPE=7)
Check item
Check method
Assumed cause
Transfer failure
Check the evenness of halftone density. Check whether uneven image or foggy image appears.
Transfer system failure is considered.
Uneven pitch
Check whether lines appear on the image in the horizontal scanning direction.
Drum failure, developing system failure, laser exposure system failure or drive-related failure is considered.
Uneven density
(rear/front)
Check the density difference between the front and rear sides.
Drum failure or developing system failure is considered.