Canon MX850 Manuale Utente

Routine Maintenance

When printing becomes faint or colors are incorrect even if ink remains in the ink tanks, the print 
head nozzles are probably clogged. Print the nozzle check pattern to confirm the condition of the 
nozzles and then perform Print Head Cleaning.
If print results are not satisfactory, performing Print Head Alignment may improve print quality.

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Before performing maintenance
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Open the Scanning Unit (Printer Cover) and make sure that all lamps for the ink tanks are lit red.
If not, see “Getting the Ink Status Information” on page 107 and take the appropriate action.

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Increase the Print Quality setting in the printer driver settings.
For details, refer to the PC Printing Guide on-screen manual.

See “Printing the Nozzle Check Pattern” on page 115.

If lines are missing or if white streaks appear

After cleaning the 

Print Head, print 

and examine the 

nozzle check 

pattern.

See “Print Head Cleaning” on page 117.

If the problem is not resolved after performing 

Print Head Cleaning twice

See “Print Head Deep Cleaning” on page 118.

If Print Head Deep Cleaning does not resolve the problem, turn off the machine and perform another Print 

Head Deep Cleaning after 24 hours. If the problem is still not resolved, the Print Head may be damaged. 

Contact your Canon service representative.

See “Aligning the Print Head” on page 119.

You can also perform the maintenance operation from your computer. For details, refer to the PC Printing 

Guide on-screen manual.