Canon BJC-4400 - Manual (Page 63)

Chapter 4 Maintaining the Printer 4-9
You may need to replace the BJ cartridge or a BJ tank when your printed
output is not crisp and clear and there are gaps in the characters
(missing dots)—even after you have cleaned the print head at least five
times.
If you are using the BC-21e Color BJ Cartridge and your output is
blank, one of the BJ tanks is probably out of ink. See the instructions
starting on page 4-18 for replacing a BJ tank.
N
Canon has more engineers dedicated to creating quality ink for providing
the best results for output on Bubble Jet printers than any other
organization. Canon does not prohibit the use of third-party inks and the
use of third-party inks does not invalidate the product’s limited warranty.
However, Canon cannot guarantee the quality or performance of your
printer when you are using inks from other suppliers.
Canon’s limited warranty does not cover damage caused to Canon’s
Bubble Jet products that is attributable to the use of third party parts or
supplies, including inks. The limited warranty remains in effect for its
life once that particular damage has been properly repaired.
For optimum printing results, Canon recommends that you use only
Canon BJ cartridges and BJ tanks.
Maintaining the Printer