Canon BJC-250 - Manual (Page 57)

Cleaning the Print Head Using the Operator Panel
If you want to clean the print head from the operator panel, follow these steps:
1
Make sure the green POWER light is on. Make sure
the printer is
on.
2
The POWER light will blink for several seconds while the print head is being
cleaned Press and
hold the
RESUME
button for
at least
two
seconds
until the
printer
beeps
twice.
Perform the print head cleaning only when you encounter a print
quality problem. Unnecessary and repetitious cleaning will waste ink.
If you execute the print head cleaning while paper is manually loaded,
the printer will eject the paper and then perform the cleaning.