Canon multipass c3000 Service Manual (en)

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5. BJ CARTRIDGE
This model accepts three types of BJ cartridges, the BC-20, BC-21 and BC-22.
5.1 Structure
a) BC-20 Black BJ cartridge structure
The black BJ cartridge contains a 360 dpi 
×
128 nozzle bubble jet print head unit, on-
demand thermal ink jet type, containing 44 ml of ink. The black ink contained in the ink
sponge is filtered with a meshed ink filter to remove dust, and sucked into bubble jet print
head unit through a joint pipe.
b) BC-21 Color BJ cartridge structure
The color BJ cartridge has a printing head equipped with 360 dpi 
×
136 nozzles through
which the four ink colors are ejected (24 nozzles each for yellow, magenta, and cyan; 64
nozzles for black).  The ink cartridge (one for black and one for the other three colors) are
removable and replaceable.  The BCI-20 black ink tank contains 9 ml of black ink.  The
BCI-21 color ink tank contains 5 ml each of yellow, cyan, and magenta ink.
c) BC-22 Photo Color BJ cartridge structure
The photo color BJ cartridge has a printing head equipped with 360 dpi 
×
136 nozzles
through which the four ink colors are ejected (24 nozzles each for yellow, magenta, and
cyan; 64 nozzles for black).  The BJ cartridge contains 9 ml of black ink , 5 ml each of
yellow, cyan and magenta ink.
For details on the structure of the Bubble jet head unit structure (Printing
mechanism),  INKSAVER (economy) printing, and maintenance jet, see the
FACSIMILE BASIC•INTER SUPPLEMENT 2 (supplied separately)
.
Part 1: Facsimile
2-20
REFERENCE
Nozzle 1
Nozzle 128
Nozzle 1
Nozzle 136
Yellow Nozzles 1 to 24
Magenta Nozzles 25 to 48
Cyan Nozzles 49 to 72
Black Nozzles 73 to 136
Black BJ Cartridge
Color BJ Cartridge
Photo BJ Cartridge
Figure 2-13 Nozzle Arrangement