Canon iP1500 - PIXMA Color Inkjet Printer Service Manual page 11

6-2. Print Head Troubleshooting Flowchart (print head operation confirmation)
Connect to computer
Nozzle check pattern printing
Correct?
No
Print head cleaning
Nozzle check pattern printing
Correct?
No
Print head deep cleaning
Nozzle check pattern printing
Correct?
No
Print head deep cleaning
Nozzle check pattern printing
Correct?
No
Replace ink tanks
Nozzle check pattern printing
Correct?
No
Defective
See 4. SERVICE MODE
for printing method.
Yes
See 4. SERVICE MODE
for cleaning method.
Yes
See 4. SERVICE MODE
for cleaning method.
Yes
Yes
Yes
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