Canon FAXPHONE L75 Service Manual page 119

LASER CLASS 1060P Chapter 4: Maintenance & Service
• Light
Solutions:
(1) Remove the toner cartridge and shake it lightly five or six times.
(2) Verify that user data "PRINTER SETTING" "ECONOMY PRT" is not "ON".
(3) Replace the toner cartridge.
(4) Open the front cover during printing, and remove the toner cartridge. Open the
(5) Clean the transfer bias contact and the transfer charging roller shaft contact.
(6) Replace the transfer charging roller.
(7) Clean the developing bias contact and the toner cartridge contact.
(8) Replace the PCNT board.
(9) Replace the LASER/scanner section.
(10) Replace the SCNT board.
(11) Replace the power supply unit.
• Dark
Solutions: (1) Verify that user data "PRINTER SETTING" "ECONOMY PRT" is not "ON".
(2) Clean the drum ground contact and the toner cartridge contact
(3) Clean the primary charging contact and the toner cartridge contact.
(4) Replace the LASER/scanner section.
(5) Replace the SCNT board.
• Completely blank
Solutions: (1) Clean the developing bias contact and the toner cartridge contact.
(2) Check whether the projection for opening and closing the LASER shutter on the
(3) Replace the LASER shutter lever or the LASER shutter.
(4) Replace the PCNT board.
(5) Replace the LASER/scanner section.
(6) Replace the SCNT board.
(7) Replace the power supply unit.
• All black
Solutions: (1) Replace the toner cartridge.
(2) Clean the primary charging contact and the toner cartridge contact.
(3) Replace the PCNT board.
(4) Replace the LASER/scanner section.
(5) Replace the SCNT board.
(6) Replace the power supply unit
cartridge drum cover shutter manually, and check whether the toner image on the
photosensitive drum is transferred onto the paper. If it is transferred, go to item (7).
If not, go the following step.
toner cartridge is damaged.
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