Canon Bubble Jet Printer i450 Simplified Manual page 12

6.2. Print Head Troubleshooting Flowchart (print head operation confirmation)
Connect to computer
Nozzle check pattern
Correct?
Head cleaning
Nozzle check
Correct?
Head refreshing
Nozzle check
Correct?
Head refreshing
Nozzle check
Correct?
Replace ink tanks
Nozzle check
Correct?
Defective
*Refer to 4. SERVICE MODE
Yes
No
*Refer to 4. SERVICE MODE
Yes
No
*Refer to 4. SERVICE MODE
Yes
No
Yes
No
Yes
No
Normal
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