Canon BJC-4300 Series, User Manual, Page: 67 / 100

Replacing the BJ Cartridge
The following procedure describes how to replace the BC-21e Color BJ Cartridge with the
BC-20 Black BJ Cartridge. Follow the instructions in this section to replace an old BJ
cartridge or to change BJ cartridges when you are switching between the BC-21e and any of
the other BJ cartridges.
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 is out of ink, see the next section (page 4-18) for
instructions on how to replace a BJ tank.
You may replace the BJ tanks in the BC-21e Color BJ cartridge as many as 20
times (or more) before you need to replace the BJ cartridge.
Before starting, make sure the printer's power is on.
1
Open the front
cover. Use both hands to grasp the sides of the cover and pull it toward you.
4300 Chapter 4 Page 11