Canon BJC-55 - Manual (Page 81)

3.
Open the top cover.
When the top cover is open, never touch the orange film cable inside
the printer.
4.
With the tip of your finger, lift up the green tab on the corner of the
BJ Cartridge then raise the cartridge out of the cartridge holder.
Make sure that you remove the whole BJ Cartridge, not just the ink
cartridges.
79 Chapter 5 Daily Operation and Printer Maintenance
5
Hold the green tab
to remove the BJ
Cartridge.
Film cable