Canon PC-D320 Service Manual page 112

PC-D320/PC-D340/FAX-L400 Chapter 4: Maintenance and Service
• Irregular and smudged black horizontal lines
Solutions:
• Marks
Solutions:
• Blank spots
Solutions:
• White vertical lines
Solutions:
If the irregular smudged black lines occur cyclically, replace the toner
cartridge. If they are non-cyclical, replace the fixing ass'y.
(1) If the marks are at intervals of approx. 62.8mm (2.47"), clean the
pressure roller; if they are at intervals of approx. 56.5mm (2.22"),
clean the fixing film unit; and if they are at intervals of approx.
75.4mm (2.97"),or 37.7mm (1.48"), replace the toner cartridge.
(2) Clean the eject roller.
(3) Clean the fixing entrance guide.
(4) Replace the pressure roller.
(5) Replace the eject roller.
(6) Replace the fixing film unit.
(1) Remove the toner cartridge and shake it lightly five or six times.
(2) Replace the toner cartridge.
(3) Clean the transfer charging roller.
(4) Replace the transfer charging roller.
(5) Clean the developing bias contact and the toner cartridge contact.
(6) Replace the ECNT board.
(7) Replace the SCNT board.
(1) Remove the toner cartridge and shake it lightly five or six times.
(2) While printing is taking place, open the right cover, and take out
the toner cartridge.
(3) Open the toner cartridge drum shutter and if there are vertical white
lines on the photosensitive drum, replace the toner cartridge.
(4) Check for foreign matter stuck in the Laser output hole on the
Laser/Scanner unit or the Laser input hole on the toner cartridge.
(5) Clean the eject roller.
(6) Replace the eject roller.
(7) Clean the fixing entrance guide.
(8) Clean the fixing film unit.
(9) Replace the fixing film unit.
(10) Replace the Laser/Scanner unit.
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