Canon BJC-4550 User Manual - Page 76

Replacing the BJ Cartridge

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Replacing the BJ Cartridge The following procedure describes how to replace the BC-21 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-21 and any of the BJ cartridges. You only need to replace the BC-21 Color BJ Cartridge when the print head is damaged (or after printing approximately 2000 pages). If one of the ink tanks (either color or black) in your BC-21 Color BJ Cartridge is out of ink, see the next section (page 5-18) for instructions on how to replace an ink tank. Before starting, make sure the printer's power is on. Open the front cover. r Use both hands to grasp the sides of the cover and pull it toward you. Maintaining the Printer Chapter 5 Maintaining the Printer 5-11

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Chapter 5
Maintaining the Printer
5-11
Replacing the BJ Cartridge
The following procedure describes how to replace the BC-21 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-21
and any of the BJ cartridges.
You only need to replace the BC-21 Color BJ Cartridge when the print
head is damaged (or after printing approximately 2000 pages). If one of
the ink tanks (either color or black) in your BC-21 Color BJ Cartridge is
out of ink, see the next section (page 5-18) for instructions on how to
replace an ink tank.
Before starting, make sure the printer’s power is on.
Use both hands to grasp the sides of the cover and pull
it toward you.
Open the
front cover.
Maintaining
the Printer