Canon LASER CLASS 730i Service Manual page 119

LASER CLASS 730i/720i/710 Chapter 4: Maintenance and Service
• Blank spots
Solutions:
• White vertical lines
Solutions:
• White horizontal lines
Solutions:
• Faulty registration
Solutions:
(1) Clean the transfer charging roller.
(2) Replace the transfer charging roller.
(3) Replace the toner cartridge.
(4) Check for foreign matter button the transfer charging roller gear and
the drive gear.
(5) Clean the developing bias contact and the toner cartridge contact.
(6) Replace the EPU board.
(7) Replace the ECU board.
(8) Replace the power supply unit.
(9) 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 printer 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 section or the LASER input hole on the toner
cartridge.
(5) Clean the fixing entrance guide.
(6) Replace the fixing ass'y.
(7) Replace the LASER/scanner section.
(1) Replace the toner cartridge.
(2) Replace the fixing ass'y.
(1) Check if more than the regulation amount of paper is loaded in the
multi-purpose tray and cassette.
(2) Clean the paper pickup roller.
(3) Replace the paper pickup roller.
(4) Check whether the paper edge sensor actuator is damaged or
deformed.
(5) Replace the pickup solenoid.
(6) Replace the paper edge sensor.
(7) Replace the ECU board.
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