12-18 Maintenance Chapter 12When to Replace the BJ CartridgeHow frequently you need to replace your MultiPASS C70’s BJ cartridgeor one of its BJ tanks depends on how you use your MultiPASS C70. Ifyou print a good deal of graphics, halftones, or greyscales, you willneed to replace the BJ cartridge more often than if you print mainly text.(See page A-12 for details on the life expectancy of BJ cartridges.)To help ensure the maximum life for your cartridges, always follow theguidelines for cartridge maintenance given on page 12-14.In general, you will need to replace the BJ cartridge in the followingsituations:❏ If you have been using the BC-21e Colour BJ cartridge for over sixmonths, or the BX-20 Black BJ cartridge for over a year.❏ If your printed output is not crisp and clear or has gaps in thecharacters (missing dots), even after you have cleaned the print headfive times as described on page 12-17.❏ If your colour printouts appear to be missing a colour, even afteryou have cleaned the print head five times as described on page12-17.❏ If the message CHANGE CARTRIDGE appears in the LCD display.In general, you will need to replace an ink tank in the BC-21e Colour BJcartridge in the following situations:❏ If your output is blank.❏ If your colour printouts appear to be missing a colour, even afteryou have cleaned the print head five times as described on page12-17.❏ If the message BLACK INK EMPTY or COLOR INK EMPTY appearsin the LCD display.Use the procedure on the following page to replace an old BJ cartridgeor change the BJ cartridge to a different one.
