Pixma mg 3522 exploaded view - Canon Office Equipment & Supplies

Although the printer costs less than the ink it is coming with, I think it is to dangerous to put in a grenade and trying to picture that.
When you are looking for a service manual, be aware you need special tools and special replacement parts to build it together. Buying a new printer will save you time, money and frustration. But if you want to do, on your own risk see how printers are repaired here:
Canon Printer Repair