Replacing The Bj Cartridge - Canon FAX-B840 User Manual

Cleaning the BJ cartridge print head
If your printouts become faint or streaked, or if their quality otherwise deteriorates, print the nozzle check pattern to
see if the print head nozzles are operating properly (see p. 57). If the pattern is broken or missing, clean the BJ
cartridge print head.
• To maintain the best possible print quality, clean the BJ cartridge print head from time to time.
• Cleaning the print head consumes a small amount of ink. Cleaning too often reduces the amount of ink in the BJ cartridge.
1 Press [Function], then press [Cleaning].
2 Use [ ] or [
The fax cleans the print head.
• You can clean the print head up to five consecutive times if necessary.
• After cleaning, print the nozzle check pattern to check if cleaning corrected the problem (see p. 57).
• If cleaning does not improve print quality, replace the BJ cartridge (see below).

Replacing the BJ cartridge

• Do not replace the BJ cartridge while the fax is printing or performing another operation.
• If you need to unplug the fax, wait until it returns to standby mode (time and receive mode displayed on the LCD).
Otherwise the cartridge holder may not be in its home position, causing the BJ cartridge to remain uncapped and dry out.
1 Make sure the fax is plugged in, then open the printer cover.
• Do not try to manually move or stop the cartridge holder.
• Do not touch any metal parts.
2 Raise the cartridge lock lever a on the cartridge holder
and remove the BJ cartridge b.
• Discard the old BJ cartridge immediately according to the local laws and
regulations for disposal of consumables. You may want to place it in a
plastic bag to keep any residual ink from spilling.
• Spilled ink can stain any surface; protect yourself and your work area.
3 Remove the new BJ cartridge from its package, then
remove the orange protective cap a and tape b.
• Discard the cap and tape. Never attempt to reattach them to the BJ
cartridge print head.
• Install the BJ cartridge immediately after removing the cap and tape.
• Spilled ink can stain any surface; protect yourself and your work area.
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] to select HEAD CLEANING, then press [Start/Copy].
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