Canon MultiPASS C530 Service Manual page 97

MultiPASS C530/C560 Chapter 2: Technical Reference
5. BJ CARTRIDGE
This model accepts three types of BJ cartridges, the BC-20, BC-21e and BC-22e.
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-21e Color BJ cartridge structure
The color BJ cartridge has a printing head equipped with 360 dpi/720 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.
When drop modulation technology is used, small dots are printed in low density areas to minimize the
graininess and large dots are used for high density areas. Using this technology allows the printer to
retain its printing speed and achieve high quality printing.
c) BC-22e 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. Adopting drop
modulation technology, the photo BJ cartridge prints small dots in low density areas to minimize the
graininess and large dots in high density areas to retain its printing speed and achieve high quality
printing.
NOTE
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) .
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