Canon PIXMA TS302 Online Manual page 282

Load paper with the printable side facing up.
Refer to the instruction manual supplied with the paper for detailed information on the printable side.
Is the FINE cartridge installed properly?
Check5
If the FINE cartridge is not installed securely, ink may not be ejected correctly.
Retract the output tray extension and the paper output tray, open the cover, then remove the FINE cartridges.
Then install the FINE cartridges again. Push up the FINE cartridge until it clicks into place.
After confirming that the FINE cartridge is installed properly, close the cover.
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