Horizontal line (TYPE=8/9/10)

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Horizontal line (TYPE=8/9/10)

Check item | Check method | Assumed cause
Black line | Check whether black lines appear on the image. | Laser light path failure, developing system failure, cleaning (drum) failure or transfer roller failure is considered.
White line | Check whether white lines appear on the image. | Developing 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.