Horizontal White Lines; Loose Toner - Canon mf6600 Series Service Manual

Cause
3) Foreign substance adheres to the laser beam
window of the printer or cartridge
4) Foreign substance adheres to the fixing inlet
guide or the guide is dirty
5) Scratches or foreign substance on the fixing
film
6) The mirror in the laser scanner unit is dirty
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Horizontal White Lines

F-6-13 F-6-13
Horizontal white line appears in image
Cause
1) Horizontal scratches on the photosensitive
drum
2) The fixing film is defective
3) Scratches/stain on the Developing Sleeve
6
Trouble Shooting > Trouble Shooting Items > Image Defects > Loose Toner
Solution
Remove foreign substance from the laser beam
window.
Clean the fixing inlet guide.
Replace the fixing unit.
Replace the laser scanner unit.
Solution
Replace the cartridge.
Replace the fixing unit.
Replace the cartridge.
6 Trouble Shooting > Trouble Shooting Items > Image Defects > Loose Toner
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Loose Toner

T-6-10 T-6-10
F-6-14 F-6-14
Toner image is not fully fixed on the media
Cause
1) The pressure roller is not within nip-width
specifications
2) The pressure roller is dirty
3) The pressure roller is scarred or dent
4) Scratches or foreign substance on the fixing
film
5) The thermistor has deteriorated
T-6-11 T-6-11
Solution
See "MAINTENANCE AND SERVICE" to check
the nip-width specifications. If the pressure roller
is not within the specifications, replace the fixing
unit.
Replace the fixing unit.
Replace the fixing unit.
Replace the fixing unit.
Replace the fixing unit.
T-6-12 T-6-12
6-7
6-7