Canon PC-D320, Service Manual

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PC-D320/PC-D340/FAX-L400 Chapter 4: Maintenance and Service
4-33
• White horizontal lines
Solutions:
(1) Replace the toner cartridge.
(2) Clean the fixing film unit.
(3) Replace the fixing film unit.
• Faulty registration
Solutions:
(1) Check if more than the regulation amount of paper is loaded in the
multi-purpose tray and cassette.
(2) Clean the paper pick-up roller.
(3) Replace the paper pick-up roller.
(4) Check whether the page top sensor actuator is damaged or deformed.
(5) Clean the paper feed roller.
(6) Replace the paper feed roller.
(7) Replace the page top sensor.
(8) Replace the ECNT board.
(9) Replace the SCNT board.
• Distortion/BD signal failure
Solutions:
(1) Check the connection between the Laser/Scanner unit (J801/J802) and
the SCNT board (J507/J508) connector connections.
(2) Replace the Laser/Scanner unit.
(3) Replace the SCNT board.
• Partially compressed/stretched image
Solutions:
(1) Check for foreign matter between the toner cartridge gear and the
drive gear.
(2) Check if the toner cartridge gear is broken.
(3) Replace the toner cartridge.
• Poor fixing
Solutions:
(1) If the marks are at intervals of approx. 56.5mm (2.22"), clean the
fixing film unit; if they are at intervals of approx. 62.8mm (2.47"),
clean the pressure roller.
(2) Replace the pressure roller.
(3) Replace the fixing film unit.
(4) Check the nip width of the fixing section. If it is not as specified,
replace the fixing film unit.
(5) Replace the ECNT board.
(6) Replace the SCNT board.