Canon BJC 50 Service Manual - Page 168

Part 5: Maintenance BJC-50 6. Print Defect Other Print Problems Symptom • Smeared paper Check Item Ink mist on the platen. Measures Use a soft cloth moistened with water to clean. Clean a few times, If the problem persists, replace the BJ cartridge. Replace printer base unit. • • • • Ink has clogged around the head's nozzles. (No smearing during paper feeding and discharging). Ink has clogged or paper bits have stuck around the purge unit's head wiper or head capping area. Ink has adhered to the paper transport system. (The paper is already smeared by the time it reaches the platen). Spur tracks appear Ink has adhered to the spurs. Spurs have deformed Misaligned vertical The BJ cartridge is installed lines appear incorrectly. The problem re-occurs when the user's BJ cartridge (causing the problem) is installed in a normally-operating printer. Corrugated printing Chassis is deformed. Frinctional wear between the carriage unit and the carriage shaft. Irregular darkness Check the printing mode. of printout BJ cartridge is faulty. Clean the paper feed roller and the platen. Use a soft toothbrush to clean. Replace the print unit. Reinstall the BJ cartridge correctly. Replace the BJ cartridge. Replace the print unit. Replace the print unit. Reset the printing mode. Replace the BJ cartridge. 5-28