Canon FAX-L350, Руководство по обслуживанию

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3-21
FAX-L350 Chapter 3: Maintenance and Service
• Light
Solutions: (1) Remove the toner cartridge and shake it lightly five or six times.
(2) Verify that user 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
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.
(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.
• Dark
Solutions:
(1) Verify that user setting
“ECONOMY PRT”
is not
“OFF”
.
(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
toner cartridge is damaged.
(3) Check the voltage connector (MCNT : J503/J5, SCNT : J501/J3) for the high-
voltage power circuit.
(4) Replace the PCNT board.
(5) Replace the LASER/scanner section.
(6) Replace the SCNT board.
• 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.
• Dots
Solutions: (1) Clean the static charge eliminator in the toner transfer section.
(2) Check the static charge eliminator contact.
(3) Clean the transfer charging roller.
(4) Replace the transfer charging roller.