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.

NCanon 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

Chapter 4

Maintaining the Printer 4-9

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Canon BJC-4400 user manual Chapter