Canon BJC 7000 - Manual (Page 58)

If the print head is hot, it may not move until it has cooled down. Never
attempt to force the cartridge holder to the left manually. Wait a few
minutes for the print head to cool down, then press the CARTRIDGE
button again.
2
Remove the
BJ
cartridge.
o If you are removing the BC-60 Black BJ Cartridge, pull up on the
left cartridge to remove it.
o If you are removing the color cartridge (either the BC-61 Color BJ
Cartridge or BC-62 Photo BJ Cartridge), pull up on the right
cartridge to remove it.