Printing Problems - Canon SmartBase MPC600F Service Manual

SmartBase MPC600F/MPC400 Chapter 4: Maintenance & Service

4.3.2 Printing problems

• Faulty printing (Evaluation criteria: Test print is no good.)
• The paper is not fed properly. (Evaluation criteria: Look at the actual unit.)
The Paper feed motor does not run.
(1) Check the connection from the paper feed motor to the PCNT board (J10).
(2) Replace the PCNT board.
(3) Replace the main unit.
The paper is not picked up from the auto sheet feeder.
(1) Check the connection ASF motor to the PCNT board (J7).
(2) Check the foreign matter in the paper feed section.
(3) Replace the ASF unit.
(4) Replace PCNT board (Faulty PRS or PES).
• The printing operation is abnormal.
Nothing is printed.
(1) Remove the BJ-cartridge and re-install it.
(2) Execute cleaning five times, and try printing again.
(3) Replace the BJ cartridge.
(4) Replace the ink tank.
(5) Check the connection between carriage ribbon cable and PCNT board (J1, J2, J3).
(6) Replace the carriage unit.
(7) Replace the PCNT board.
The carriage motor does not run.
(1) Check the connection from the carriage motor to the PCNT board (J9).
(2) Replace the carriage motor.
(3) Replace the PCNT board.
• Carriage error
The carriage comes into contact with the push-on plates at the left and right sides,
resulting in noise.
(1) Check if grease adheres to the carriage encoder film.
(2) Using lint-free paper impregnated with alcohol, wipe the carriage encoder film with care so as
not to scratch the film.
(3) If a lot of grease adheres to the carriage, replace the carriage board because grease might be
spread to the sensor on the carriage board. (In this case, you must replace the carriage unit
(QG4-0011) which contains the carriage board.)
(4) Replace the carriage encoder film.
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