It is little bit tricky.
1st run empty ink mode for the head you will change.
2nd lower service station to deepest point.
Release the 2 skrews from underside the printhead....so you can pull out the head from underside....before...cable wire from head must be disassembledand elektric off
inside new head...... Then restart, fill heads with ink. Run Y-Calibration you become all instruction displayed.....but often you dont need to change the y-calibration so the printhead caddy sit on his place......so only autofullset calibration required.
thats it......if you need pictured instruction pls contact me can send on your email.
kindly regards