Canon MultiPASS C545 User Manual - Page 134

When to Replace the BJ Cartridge How frequently you need to replace your BJ cartridge or one of its BJ tanks depends on how you use your MultiPASS. If you print a good deal of graphics, halftones, or grayscales, you will need to replace the BJ cartridge more often than if you print mainly text. (See page A-5 for details on the life expectancy of BJ cartridges.) To help ensure the maximum life for your cartridges, always follow the guidelines for cartridge maintenance given on page 6-11. In general, you will need to replace the BJ cartridge in the following situations: ❑ If you have been using the BC-21e Color BJ Cartridge for over six months, or a BC-20 Black BJ Cartridge for over a year. ❑ If your printed output is not crisp and clear or has gaps in the characters (missing dots), even after you have cleaned the print head five times as described on page 6-14. ❑ If your color printouts appear to be missing a color, even after you have cleaned the print head five times as described on page 6-14. ❑ If the message CHANGE CARTRIDGE appears in the LCD display. In general, you will need to replace an ink tank in the BC-21e Color BJ Cartridge in the following situations: ❑ If your output is blank. ❑ If your color printouts appear to be missing a color, even after you have cleaned the print head five times as described on page 6-14. ❑ If the message BLACK INK EMPTY or COLOR INK EMPTY appears in the LCD display. Use the procedure on the following page to replace an old BJ cartridge or change a BJ cartridge when switching between the BC-21e Color BJ Cartridge and any other optional BJ cartridge. You only need to replace the BC-21e Color BJ Cartridge when the print head is damaged (or after printing approximately 2000 pages). If one of the BJ tanks (either color or black) in your BC-21e Color BJ Cartridge runs out of ink, refer to the procedure on page 6-22 to replace the BJ tank. Maintenance Chapter 6 Maintenance 6-15