Canon FAX-L1000 - Manual (Page 320)

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FAX-L1000 Chapter 4: Maintenance and Service
Light
Solution: (1) In user data, set “ SELECT DENSITY ” of “ FAX’S PRINTER SET ”
to “ DK ”.
(2) Replace the toner cartridge.
(3) During printing, open the printer cover, remove the toner cartridge,
open the toner cartridge drum protective shutter by hand, and check
that the toner image on the photosensitive drum is transferred to the
recording paper. If it is transferred and the toner image on the drum
surface is light, go to (4). If the toner image on the drum is faint, go to
(7).
Do not open the toner cartridge drum protective shutter for more than
10 seconds.
(4) Clean the high-voltage terminal, the toner cartridge contact and the
transfer charging roller shaft contact.
(5) Replace the transfer charging roller.
(6) Replace the ECNT board.
(7) Replace the laser/scanner unit.
(8) Replace the ECNT board.
Dark
Solution: (1) In user data, set “ SELECT DENSITY ” of “ FAX’S PRINTER SET ”
to “ LT ”.
(2) Clean the drum ground contact and the toner cartridge contact.
(3) Clean the high-voltage terminal and the toner cartridge contact.
(4) Replace the laser/scanner unit.
(5) Replace the ECNT board.
Completely blank
Solution: (1) Check if the toner cartridge drum protective shutter is damaged.
(2) Replace the toner cartridge.
(3) Clean the high-voltage terminal and the toner cartridge contact.
(4) Check if the laser shutter opens when you press the laser shutter lever.
(5) Replace the laser shutter lever or the laser shutter.
(6) Replace the ECNT board.