Canon PIXMA iP4500 Series Quick Start Manual page 48

(3) Confirm the displayed message and click Print
Head Alignment.
The print head alignment pattern is printed.
Printing takes about 10 minutes to complete.
Important
Do not open the Top Cover while printing.
Note
Clicking Print Alignment Value prints the current
settings and finishes Print Head Alignment.
If the pattern is printed as shown to the right, the
Print Head is aligned automatically.
Note
If the pattern is not printed successfully, see
"ALARM Lamp Flashes Orange" on page 77.
If results of Automatic Print Head Alignment are not
satisfactory, see "Manual Print Head Alignment" on
page 47 and align the Print Head manually.
44 Routine Maintenance