Canon BJ-230 - Manual (Page 18)

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.
8. Close the front cover.
When you turn off the printer, the ink cartridge moves to the home
position on the right and caps itself to keep from drying out. If you
unplug the printer while it is printing, or if you move the ink cartridge
from the home position, the cartridge is not capped and may dry out.
CAUTION: Do not move the ink cartridge after installing it. Moving the
ink cartridge to the left and leaving it there may uncap the print head and
cause it to dry out.
NOTE: If, after installing a new ink cartridge, the printer seems to be
printing but no ink appears, stop the print operation. Remove and replace
the ink cartridge making sure it is secure.