Canon CLBR 460ps Service Manual page 276

CHAPTER 4
Action: Replace the drum cartridge.
2) Circumferential scars on the upper fixing roller
Action: Replace the upper fixing roller.
[ 2-9 ] White vertical lines
<Possible causes>
1) Defective developing cylinder (toner cartridge)
Check each developing cylinder in the toner cartridges and replace the defective toner car-
tridge.
2) Adhesion of toner on the upper fixing separation guide
Action: Clean the upper fixing separation guide.
3) Circumferential scars on the photosensitive drum
Action: Replace the drum cartridge.
4) Foreign matter is deposited on the laser outlet of the printer
Action: Remove the foreign matter.
5) Dirty mirror in the laser/scanner unit
Action: Replace the laser/scanner unit.
6) Circumferential scars on the intermediate transfer belt
Action: Replace the ITB unit.
7) Foreign matter in the ITB unit
Action: Take off the cover of ITB unit, and then remove the foreign matter.
8) Vertical scars on the upper fixing roller
Action: Replace the upper fixing roller.
[ 2-10 ] Horizontal lines
<Possible causes>
1) Horizontal scars on the photosensitive drum (drum cartridge)
Action: Replace the drum cartridge.
2) Horizontal scars on the upper fixing roller
Action: Replace the upper fixing roller.
[ 2-11 ] White horizontal lines
<Possible causes>
1) Horizontal scars on the photosensitive drum (drum cartridge)
Action: Replace the drum cartridge.
2) Horizontal scars on the intermediate transfer belt.
Action: Replace the ITB unit.
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