Canon BJC-3000 - Manual (Page 156)

156 Routine Maintenance
Replacing the BJ Cartridge
2
Raise the cartridge lock lever to unlock the BJ Cartridge.
Make sure that you raise the lever all the way up.
To avoid staining your hands, clothing, or areas in the work site, handle the
BJ Cartridge carefully. Avoid dropping or shaking the BJ Cartridge.
Cartridge lock lever
Important