Canon BJC-55 - Manual (Page 71)

When the top cover is open, never touch the orange film cable inside
the printer.
4.
Release the hook on the ink cartridge and raise it up as shown in the
illustration below.
Dispose of the ink cartridge immediately.
You may want to place it in a plastic bag to keep from spilling any ink.
Ink Cartridges BCI-11 Color and Black/BCI-12 Photo Color
and Photo Black
69 Chapter 5 Daily Operation and Printer Maintenance
5
Press this
white hook to
remove the
colour ink
cartridge.
Press this grey
hook to
remove the
black ink
cartridge.
Do not raise the green
tab!
This is for BJ Cartridge
replacement. Be sure to
leave the green print head
unit in the printer.
(Illusration below shows the Color BJ Cartridge BC-11e.)