Canon Pixma MG7150 Online Manual page 437

Step 3
Clean the print head deeply.
From the machine
Cleaning the Print Head Deeply
From the computer
Cleaning the Print Heads from Your Computer
Note
When you have performed the procedure until step 3 and the problem has not been resolved, turn off the power and
clean the print head deeply again after 24 hours.
If the problem is still not resolved, the print head may be damaged. Contact the service center.
When the Print Results Are Not Even such as the Ruled Lines Are Misaligned:
Align the print head.
From the machine
Aligning the Print Head
From the computer
Aligning the Print Head Position from Your Computer
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