Canon LBP-800, Руководство по обслуживанию

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2) Defective primary charging roller
Action: Replace the cartridge.
3) Defective engine controller PCB.
Action: Replace the engine controller PCB.
II-5. Dirt on back of paper
<Possible causes>
1) Periodic dirt (transfer charging roller, pressure roller)
Action: Identify and clean the dirty roller according to Table 4-2-2 on page 4-11. If dirt can-
not be removed, replace the dirty roller.
2) Dirty feed guide or fixing unit entrance guide
Action: Clean the dirty areas.
3) Dirty delivery roller
Action: Clean the delivery roller.
II-6. Dirt
<Possible causes>
1) Periodic dirt (pick-up roller, fixing film unit, EP-22 cartridge)
Action: Identify and clean the dirty part(s) according to Table 4-2-2 on page 4-11. If the dirt
cannot be removed, replace the dirty part(s).
2) Dirty face-down delivery sub-roller or fixing delivery sub-roller
Action: Clean the face-down delivery sub-roller or fixing delivery sub-roller.
II-7. Black vertical lines
<Possible causes>
1) Circumferential scars on the photosensitive drum
Action: Replace the cartridge.
2) Dirty fixing unit entrance guide
Action: Clean the guide.
3) Scar(s) on fixing film unit
Action: Replace the fixing film unit.
II-8. White vertical lines
<Possible causes>
1) Lack of toner
Action: Remove the cartridge from the printer. Rock the cartridge in the way described on
page 1-9 Chapter 1, and then install it back to the printer. If the problem still
remains, replace the cartridge.
CHAPTER 4
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