Canon MX720 Series, Online Manual, Page: 242 / 248

Key to Enjoying Consistent Printing Quality
The key to printing with the optimal printing quality is to prevent the print head from drying or
clogging. Always observe the following rules for optimal printing quality.
Never disconnect the power plug until the power is turned off!
If you press the ON button to turn off the power, the machine caps the print head (nozzles)
automatically to prevent from drying. If you disconnect the power plug from the wall outlet before all
the lamps on the operation panel are turned off, the print head will not be capped properly and this
will cause drying or clogging.
When disconnecting the power plug, make sure that all the lamps on the operation panel are not lit.
Notice for Unplugging the Power Cord
Important
If the power plug is disconnected, the date/time settings will be reset and all documents stored
in the machine's memory will be lost. Send or print a necessary document, or save it on a USB
flash drive before disconnecting the power plug.
Print periodically!
Just as the tip of a felt pen becomes dry and unusable if it has not been used for a long time, even if it
is capped, the print head too, may become dried or clogged if the machine has not been used for a
long time.
We recommend you to use the machine at least once a month.
Note
Depending on the type of paper, ink may blur if you trace the printed area with a highlight pen
or paint-stick, or bleed if water or sweat comes in contact with the printed area.