Canon Pixma TR7800 Series, Online Manual

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After printing the nozzle check pattern, examine the pattern.
• From the printer •
Printing the Nozzle Check Pattern.
If the pattern is not printed correctly, go to the next step.
Step 2
Clean the print head.
After cleaning the print head, print the nozzle check pattern and check the result.
• From the printer •
Cleaning the Print Head
If it still does not improve, go to the next step.
Step 3
Clean the print head again.
After cleaning the print head again, print the nozzle check pattern and check the result.
If it still does not improve, go to the next step.
Step 4
Clean the print head deeply.
After cleaning the print head deeply, print the nozzle check pattern and check the result.
• From the printer •
Deep Print Head Cleaning
If it does not improve, turn off the printer, wait for more than 24 hours without unplugging the power supply, and go to the next step.
Step 5
Clean the print head deeply again.
After cleaning the print head deeply again, print the nozzle check pattern and check the result.
For details on printing the nozzle check pattern, print head cleaning, and print head deep cleaning, see If Printing
Is Faint or Uneven .
Step 6
Replace the FINE cartridge.
If problem is not resolved after performing print head deep cleaning twice, the print head may be damaged, or ink may have run out. Replace
the FINE cartridge.
Replacing a FINE Cartridge
Check 5
When using paper with one printable surface, check the correct printable side
of the paper.
Printing on the wrong side of such paper may cause unclear prints or prints with reduced quality.
When you load paper on the rear tray, load paper with the printable side facing up. When you load paper in the
cassette, load paper with the printable side facing down.
Refer to the instruction manual supplied with the paper for detailed information on the printable side.
• When copying, see also the sections below: •
Check 6
Is platen glass or ADF dirty?
Clean the platen glass or ADF.
Cleaning Platen and Document Cover
Cleaning the ADF (Auto Document Feeder)
Note
• If the glass of ADF is dirty, black streaks appear on the paper as shown below. •
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