Canon MG3500 Series Online Manual page 93

Important
The head cover will open automatically after you open the paper output cover.
If you have closed the head cover while replacing a FINE cartridge, close the paper
output cover, then open it again.
Trying to force open the head cover with your hand may cause the machine to
malfunction.
Do not touch the metallic parts or other parts inside the machine.
If the paper output cover is left open for more than 10 minutes, the FINE cartridge
holder moves to the far right and the Alarm lamp lights. In this case, close the paper
output cover, then open it again.
3. Remove the empty FINE cartridge.
(1) Push down the ink cartridge lock lever until it clicks.
(2) Remove the FINE cartridge.
Important
Handle the FINE cartridge carefully to avoid staining of clothing or the surrounding
area.
Discard the empty FINE cartridge according to the local laws and regulations
regarding disposal of consumables.
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