Canon G4000 series Online Manual page 50

Important
• Do not touch tubes or other parts inside the printer.
3. Open ink tank cover.
To refill the black ink tank, open the left ink tank cover (C).
To refill color ink tanks, open the right ink tank cover (D).
4. Grab and remove the tank cap (E) of the ink tank to be refilled.
Place the removed tank cap on the upper tank cap holder (F).
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