When Printing Becomes Faint Or Colors Are Incorrect - Canon PIXMA MX850 Series Quick Start Manual

When Printing Becomes Faint or Colors Are Incorrect

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.
Note
Before performing maintenance
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.
Increase the Print Quality setting in the printer driver settings.
For details, refer to the PC Printing Guide on-screen manual.
Step 1
See "Printing the Nozzle Check Pattern" on page 115.
If lines are missing or if white streaks appear
Step 2
See "Print Head Cleaning" on page 117.
If the problem is not resolved after performing
Print Head Cleaning twice
Step 3
See "Print Head Deep Cleaning" on page 118.
Note
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.
If the Ruled Lines Are Shifted
See "Aligning the Print Head" on page 119.
Note
You can also perform the maintenance operation from your computer. For details, refer to the PC Printing
Guide on-screen manual.
114 Routine Maintenance
After cleaning the
Print Head, print
and examine the
nozzle check
pattern.