Canon imageCLASS X LBP1238, Руководство по обслуживанию

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● Gradation 17 Pattern (TYPE = 4)
Check item Checking method Assumed cause
Gradation Check that gradation in density is made appropriately. Failure of Photosensitive Drum
Failure of laser exposure system
Failure of developing system
Fogging Check that no fogging appears in the blank area. Failure of Photosensitive Drum
Failure of laser exposure system
Failure of developing system
Black line Check that no black line appears on the image. Failure of developing system
Failure of cleaning (drum)
Failure of Transfer Roller
White line Check that no white line appears on the image. Soiling on the laser light path
Failure of developing system
Uneven Density Check that there is no density difference between the front and
rear sides. Failure of Photosensitive Drum
Failure of developing system
Failure of Transfer Roller
● Thin Horizontal Line Pattern (TYPE = 5)
7. Troubleshooting
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