I'm consistently getting too much red in my color prints from my Cannon PIXMA MP 780. I've tried deep cleaning & checked the printer alignment. the printer align printout colors look OK, but a little lighter than the example on the screen.
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Remove the black cartridge and soak it with an alcohol free window cleaner soaked paper towel let it sit on the towel for a good thirty minutes then wipe clean and put back in printer run nozzle check if necessary.
Cannon recommend a cleaning process called deep head cleaning
Open the Printers folder.
- For Windows XP select 'Start', 'Control Panel', 'Printers and Other Hardware', and 'Printers and Faxes'. - For Windows versions other than Windows XP select 'Start', 'Settings', and 'Printers'.
Right-click the printer icon and select 'Properties'.
Click the Maintenance tab, and then click the 'Deep Cleaning' icon.
Select the ink tank color(s) for deep cleaning ('All Colors', 'Black', or 'Color').
Confirm the message, and then click the 'Execute' button.
The Power lamp will blink and print head deep cleaning will start. Deep cleaning completes when the Power lamp stops blinking and lights. (It will take about a minute for the Power lamp to stop blinking and light solid.)
Print a Nozzle Check Pattern by holding down the <Resume> on the printer until the Power light flashes twice to determine if further cleaning is necessary. Up to three deep cleanings may be necessary to determine if the print head is working properly
In both cases be sure using correct ink. Use of generic ink can lead to leakage of catrridge seats do to crossion from inferrior ink quality (per Cannon). Be sure ink in proper locations - see manual. Run the maintenance proceedures: cleaning then print nozzle pattern. If all colors are not proper after two or three cleanings, perform deep cleaning. Print nozzle pattern after each cleaning. This should clear up problem. If not, print head may need replacement.