Canon FAX-L1000 - Manual (Page 322)

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FAX-L1000 Chapter 4: Maintenance and Service
Black vertical lines
Solution: (1) Clean the mirror.
(2) During printing, open the printer cover, remove the toner cartridge
drum protective shutter by hand, and check if there are vertical black
lines on the photosensitive drum.
(3) If there are vertical black lines on the photosensitive drum, replace the
toner cartridge.
(4) If there are not vertical black lines on the photosensitive drum, clean
the fixing entrance guide.
(5) Check if the scars on the fixing film unit.
(6) Replace the fixing film unit.
Irregular and smudged black vertical lines
Solution: (1) During printing, open the printer cover, remove the toner cartridge
drum protective shutter by hand, and check if there are vertical black
lines on the photosensitive drum.
(2) If there are vertical black lines on the photosensitive drum, replace the
toner cartridge.
(3) If there are not vertical black lines on the photosensitive drum, clean
the fixing entrance guide.
(4) Check if the scars on the fixing film unit.
(5) Replace the fixing film unit.
Irregular and smudged black horizontal lines
Solution: If the irregular smudged black lines occur cyclically, replace the toner
cartridge. If they are non-cyclically, replace the fixing film unit.