Canon MG3600 series Online Manual page 847

1687
Cause
The FINE cartridge is not installed properly.
What to Do
Open the paper output cover. When the head cover opens, push up the ink cartridge lock lever to make
sure the FINE cartridges are installed properly.
After that, close the paper output cover.
If the error is not resolved, remove the FINE cartridges and install them again.
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