Canon BJC-55 Series, Service Bulletin

Page: 130 / 249

3.1.1 Mechanical system configuration
a) Ink/BJ cartridge
The black BJ cartridge (BC-10) has a 360-dpi resolution and 128 nozzles, and the
color BJ cartridge (BC-11e) has a 360-dpi resolution, and 64 black nozzles, 24
yellow, 24 magenta, and 24 cyan nozzles. You can print in either black or color
simply by replacing the BJ cartridge.
The ink cartridge (BCI-10) for the BC-10 and ink cartridges (BCI-11Bk, BCI-11color)
for the BC-11e can be replaced respectively.
b) Purge section
The purge section has a function to maintain the high printing quality of the BJ
cartridge bubble jet nozzles.
The purge section consists of the pump section and wiper section.
The pump section sucks ink within the BJ cartridge so that the nozzles are smoothly
filled with ink for next printing. The wiper section wipes the head-face of the BJ
cartridge.
The purge section is driven by the paper feed motor and carriage motor.
c) Paper feed section
Paper must be fed manually, one sheet at a time.
The built in manual paper feeder can take cut sheets up to Legal size.
When a cut sheet is inserted into the manual paper feeder unit and detected by the
paper end sensor, the paper feed roller and pinch rollers which are driven by the
paper feed motor, will grab the sheet and feed it partially under the paper feed roller.
Pressing the
RESUME button will bring the paper to the print start position.
Since the paper feed unit of the printer does not have a manual-paper feed knob, all
paper-feeding operations are carried out with the
RESUME button.
d) Carriage section
The carriage that holds the BJ cartridge is moved horizontally by the carriage motor
and the drive belt. The position of carriage is detected by the home-position sensor,
which is located on the right side of printer. The printing signals sent from the
control board are transferred to the BJ cartridge on the carriage through the ribbon
cable.
The wiping hooks on the carriage move the latch lever and wiper lever to start
wiping.
Part 4: Technical Reference
BJC-50
4-20