Canon i 850 User Manual page 76

Examining the Nozzle Check Pattern
The nozzle check pattern should appear as follows when ink is discharged properly.
Examine the nozzle check pattern output by the printer.
Lines missing here indicate the
print head requires cleaning.
Unevenness in these patterns
indicates the print head requires
alignment.
Horizontal stripes in these
patterns indicate the print head
requires alignment.
Printing the Nozzle Check Pattern
Routine Maintenance
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