Canon BJC-55 - Manual (Page 74)

7.
Press down gently on the high side of the ink cartridge until the ink
cartridge clicks into the print head unit.
8.
Close the top cover.
9.
Press the CARTRIDGE button. The cartridge holder moves to the
home position and the printer starts cleaning the print head.
■ Replacing BJ Cartridges
Follow this procedure to replace or exchange a BJ Cartridge.
Before you replace a worn BJ Cartridge...
When a print head becomes worn out, the printing is no longer crisp and
clear, gaps may appear in characters, and lines may appear broken or
not complete. However, these and similar problems can also be caused
by a clogged print head.
Before you decide to replace the BJ Cartridge, always clean the print
head to confirm that the problem is not a clogged print head.
72 Chapter 5 Daily Operation and Printer Maintenance
BCI-11/BCI-12 BCI-10