Canon MB2100 SERIES Online Manual page 1214

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Cause
Cause of following may have occurred failure of automatic print head alignment.
• Print head nozzles are clogged.
• Paper of size other than A4 or Letter is loaded.
• Paper output slot is exposed to strong light.
What to Do
Press the printer's OK button and take the corresponding actions below.
• Check the print head condition by printing the nozzle check pattern.
• Load one sheet of A4/Letter-sized plain paper and perform automatic print head alignment again.
For automatic print head alignment, always load paper in the cassette.
• Adjust your operating environment and/or the position of the printer so that the paper output slot is not
exposed directly to strong light.
After carrying out the above measures, if the problem continues after aligning the print head again, press
the printer's OK button, and then perform manual print head alignment.
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