Canon LBP-860 Service Manual page 167

I - 7 Vertical black streaks
Possible Ca"sP step
I - 8 Irregular and smudged vertical bands
Possible cause 1 Step 1
c a r t r i d g e
Download Service Manual and Resetter Printer at http://printer1.blogspot.com
Open the upper cover while printing is
performed. and open the protective
shield of the rartridge. Are vertical
black streaks on the drum?
Check
Does the print quality improve when
the cartridge Is replaced?
Result Procedure
YES Replace the carlridge.
NO
Replace the fting unit.
Result Procedure
YES Replace the cartridge.