17 gradations (TYPE=2/3)

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17 gradations (TYPE=2/3)

Check item | Check method | Assumed cause
Gradation | Check whether gradation in density is made appropriately. | Drum failure, laser exposure system failure or developing system failure is considered.
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.