Canon BJC 50 Service Manual - Page 114

Part 4: Technical Reference BJC-50 3.2.4 Head-maintenance function and structure Carriage Wiping Hooks Cap Wiper Pump Figure 4-19 Purge Section 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: TABLE 4-3 CLEANING INK CONSUMPTION Printer Status 1) First time use of BJ cartridge Printer turned on by 2) Less than 72 hours from POWER button last cleaning 3) More than 72 hours from last cleaning BJ cartridge replaced or ink cartridge replaced RESUME button pressed 1) Cleaning 2) Head refreshing Approx. Ink Consumption (g) BC-10 BC-11e 0.36 0.12 0.24 0.24 0.12 0.24 0.52 0.18 0.26 0.52 0.26 0.52 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)) 4-26