Canon BJ-200e - Manual (Page 56)

6. Push the lock lever down until it snaps into place.
Make sure there is no resistance when you press on the lock lever, and
be sure no gap exists between the ink cartridge and cartridge holder.
When secure, the ink cartridge makes contact with the circuit board
inside the cartridge holder.
CAUTION: Avoid touching the yellow mounting base on which you
place the cartridge--especially the circuit board on the side of the
mounting base and the film cable that extends from the cartridge holder.