Canon BJC-55 Series, Service Bulletin

Page: 136 / 249

3.2.4 Head-maintenance function and structure
a) Cleaning function
Cleaning operation is performed to correct the print quality problem, which is
caused by none-ejection of ink, and to prevent the print defects resulting from
improper ink ejection from the BJ cartridge head nozzles.
Cleaning operation includes purging, wiping, capping, and maintenance jet. The
cleaning time varies according to the type of BJ cartridge installed and the printer
status.
The printer carries out cleaning in the following cases:
The cleaning operation is performed in the purge section. The cap, cylinder, and pump
are operated by the gears and cams, which are driven by the paper-feed motor. (See
Part
4: 3.3 Purge Section Structure. (page 4-28) )
Part 4: Technical Reference
BJC-50
4-26
Carriage
Wiping Hooks
Wiper
Pump
Cap
TABLE 4-3 CLEANING INK CONSUMPTION
Printer turned on by
POWER button
RESUME button pressed
1) First time use of BJ
cartridge
2) Less than 72 hours from
last cleaning
3) More than 72 hours from
last cleaning
1) Cleaning
2) Head refreshing
BC-10
0.36
0.12
0.24
0.24
0.12
0.24
BC-11e
0.52
0.18
0.26
0.52
0.26
0.52
Printer Status
Approx. Ink Consumption (g)
BJ cartridge replaced or ink cartridge replaced
Figure 4-19 Purge Section