Canon BJC 70 Product Setup, User Guides & Manuals - Page 142

Problem White streaks or missing dots Cause Print head nozzles may be clogged with dust. An ink tank may be empty. BJ cartridge may be installed incorrectly. The print medium being used may not be acceptable. The resolution set in the printer driver may be 180 dpi and the print mode may be Economy mode. The print head may be worn out. Solution Execute the quick cleaning of the print head (see page 101); then print a Nozzle pattern (see page 47). Repeat cleaning if necessary. If print quality is not recovered after executing the cleaning two or three times, execute the extensive cleaning procedure. Open the front cover and check the contents of the ink tanks. If there is not any liquid ink in an ink tank, replace it with a new one. Make sure the BJ cartridge and/or ink tanks are installed correctly. Use only print media specified in the Selecting Paper Types section on page 35. When printing in Epson LQ mode, printing at 180 dpi in Economy mode may cause white streaks. To remedy, select the HQ mode with the printer's operator panel. The BJ cartridge may need to be replaced. Replace it with a new one. 132 Troubleshooting Chapter 8