Canon MultiPASS C50 Service Manual page 170

Part 1: Facsimile
6. TEST FUNCTIONS
6.1 User Test Print Functions
User enabled Test print functions are as follow.
6.1.1 Nozzle check
Execute cleaning if this test printing shows each nozzle condition such as no ejection, unclear or unstable
etc. If the printing does not improve even after the cartridge is cleaned five times, replace the BJ
cartridge or the ink cartridge. Press the FUNCTION button then select "NOZZLE CHECK".
Black BJ Cartridge
Printed with the first nozzle.
Printed with the 128th nozzle.
Missing dots
Unstable printing
Color/Photo BJ Cartridge
Printed with the first nozzle.
Printed with the 136th nozzle.
Splashed dots
Figure 3-26 Nozzle Check Pattern
3-52
Yellow 24 nozzles
Magenta
24 nozzles
Cyan
24 nozzles
Black 64 nozzles