This for the CX5400 which is similar with its menu system:
Using the Control Panel
Follow the steps below to replace an ink cartridge.
Make sure this product is on and the On
light is not flashing.
When the ink is low:
Press one of the Menu
buttons until Change Cartridge appears on the LCD panel, and then press the
Color Copy button.
The ink cartridges move to the replacement position.
Make sure that the document cover is closed, and then raise the scanner unit.
Do not raise the scanner unit with the document cover opened.
Do not move the print head by hand. Doing so may damage this product.
Do not start replacing the ink cartridge before the print head stops.
For best results, shake a new ink cartridge four or five times, then remove it from its the package.
Pinch the sides of the ink cartridge that you want to replace. Lift the
cartridge out of this product and dispose of it properly. Do not take
the used cartridge apart or try to refill it.
careful when you are handling used ink cartridges, as there may be some
ink around the ink supply port. If ink gets on your skin, wash the area
thoroughly with soap and water. If ink gets into your eyes, flush them
immediately with water. If discomfort or vision problems remain after
thorough flushing, see a doctor immediately.
sure to always install an ink cartridge into this product immediately
following the removal of an old ink cartridge. If the ink cartridge is
not installed promptly, the print head may dry out rendering it unable
Place the ink cartridge vertically into the cartridge holder. Push the ink cartridge down until it clicks into place.
If you need to replace other ink cartridges, repeat steps 4 through 6 before continuing with step 7.
Lower the scanner unit.
The print head moves and ink charging begins. The On
light flashes while ink charging is in progress. When the On
light stops flashing, ink charging is completed.