Hello,
Well, if it's anything like my Pixma 2522 look under name cannon where paper comes out front you will see a built-in handle pull on that handle with machine on it should allow the jets to come to center inside machine you have to reach in and stick finger on top of each jet push slightly down the jet will shift downward once it does this allows you to remove jet well & replace by sliding in to slotted holding area and lifting up until it clicks in place black to right color to left on mine i am sure same with yours // I do hope this help's? Im a newbie here.
fishingman,
